# MobileBERT

## MobileBERT

### Overview

The MobileBERT model was proposed in [MobileBERT: a Compact Task-Agnostic BERT for Resource-Limited Devices](https://arxiv.org/abs/2004.02984) by Zhiqing Sun, Hongkun Yu, Xiaodan Song, Renjie Liu, Yiming Yang, and Denny Zhou. It’s a bidirectional transformer based on the BERT model, which is compressed and accelerated using several approaches.

The abstract from the paper is the following:

_Natural Language Processing (NLP) has recently achieved great success by using huge pre-trained models with hundreds of millions of parameters. However, these models suffer from heavy model sizes and high latency such that they cannot be deployed to resource-limited mobile devices. In this paper, we propose MobileBERT for compressing and accelerating the popular BERT model. Like the original BERT, MobileBERT is task-agnostic, that is, it can be generically applied to various downstream NLP tasks via simple fine-tuning. Basically, MobileBERT is a thin version of BERT\_LARGE, while equipped with bottleneck structures and a carefully designed balance between self-attentions and feed-forward networks. To train MobileBERT, we first train a specially designed teacher model, an inverted-bottleneck incorporated BERT\_LARGE model. Then, we conduct knowledge transfer from this teacher to MobileBERT. Empirical studies show that MobileBERT is 4.3x smaller and 5.5x faster than BERT\_BASE while achieving competitive results on well-known benchmarks. On the natural language inference tasks of GLUE, MobileBERT achieves a GLUEscore o 77.7 (0.6 lower than BERT\_BASE), and 62 ms latency on a Pixel 4 phone. On the SQuAD v1.1/v2.0 question answering task, MobileBERT achieves a dev F1 score of 90.0/79.2 (1.5/2.1 higher than BERT\_BASE)._

Tips:

* MobileBERT is a model with absolute position embeddings so it’s usually advised to pad the inputs on the right rather than the left.
* MobileBERT is similar to BERT and therefore relies on the masked language modeling (MLM) objective. It is therefore efficient at predicting masked tokens and at NLU in general, but is not optimal for text generation. Models trained with a causal language modeling (CLM) objective are better in that regard.

This model was contributed by [vshampor](https://huggingface.co/vshampor). The original code can be found [here](https://github.com/google-research/mobilebert).

### Documentation resources

* [Text classification task guide](https://huggingface.co/docs/transformers/tasks/sequence_classification)
* [Token classification task guide](https://huggingface.co/docs/transformers/tasks/token_classification)
* [Question answering task guide](https://huggingface.co/docs/transformers/tasks/question_answering)
* [Masked language modeling task guide](https://huggingface.co/docs/transformers/tasks/masked_language_modeling)
* [Multiple choice task guide](https://huggingface.co/docs/transformers/tasks/multiple_choice)

### MobileBertConfig

#### class transformers.MobileBertConfig

[\<source>](https://github.com/huggingface/transformers/blob/v4.34.1/src/transformers/models/mobilebert/configuration_mobilebert.py#L31)

( vocab\_size = 30522hidden\_size = 512num\_hidden\_layers = 24num\_attention\_heads = 4intermediate\_size = 512hidden\_act = 'relu'hidden\_dropout\_prob = 0.0attention\_probs\_dropout\_prob = 0.1max\_position\_embeddings = 512type\_vocab\_size = 2initializer\_range = 0.02layer\_norm\_eps = 1e-12pad\_token\_id = 0embedding\_size = 128trigram\_input = Trueuse\_bottleneck = Trueintra\_bottleneck\_size = 128use\_bottleneck\_attention = Falsekey\_query\_shared\_bottleneck = Truenum\_feedforward\_networks = 4normalization\_type = 'no\_norm'classifier\_activation = Trueclassifier\_dropout = None\*\*kwargs )

Parameters

* **vocab\_size** (`int`, _optional_, defaults to 30522) — Vocabulary size of the MobileBERT model. Defines the number of different tokens that can be represented by the `inputs_ids` passed when calling [MobileBertModel](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.MobileBertModel) or [TFMobileBertModel](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.TFMobileBertModel).
* **hidden\_size** (`int`, _optional_, defaults to 512) — Dimensionality of the encoder layers and the pooler layer.
* **num\_hidden\_layers** (`int`, _optional_, defaults to 24) — Number of hidden layers in the Transformer encoder.
* **num\_attention\_heads** (`int`, _optional_, defaults to 4) — Number of attention heads for each attention layer in the Transformer encoder.
* **intermediate\_size** (`int`, _optional_, defaults to 512) — Dimensionality of the “intermediate” (often named feed-forward) layer in the Transformer encoder.
* **hidden\_act** (`str` or `function`, _optional_, defaults to `"relu"`) — The non-linear activation function (function or string) in the encoder and pooler. If string, `"gelu"`, `"relu"`, `"silu"` and `"gelu_new"` are supported.
* **hidden\_dropout\_prob** (`float`, _optional_, defaults to 0.0) — The dropout probability for all fully connected layers in the embeddings, encoder, and pooler.
* **attention\_probs\_dropout\_prob** (`float`, _optional_, defaults to 0.1) — The dropout ratio for the attention probabilities.
* **max\_position\_embeddings** (`int`, _optional_, defaults to 512) — The maximum sequence length that this model might ever be used with. Typically set this to something large just in case (e.g., 512 or 1024 or 2048).
* **type\_vocab\_size** (`int`, _optional_, defaults to 2) — The vocabulary size of the `token_type_ids` passed when calling [MobileBertModel](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.MobileBertModel) or [TFMobileBertModel](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.TFMobileBertModel).
* **initializer\_range** (`float`, _optional_, defaults to 0.02) — The standard deviation of the truncated\_normal\_initializer for initializing all weight matrices.
* **layer\_norm\_eps** (`float`, _optional_, defaults to 1e-12) — The epsilon used by the layer normalization layers.
* **pad\_token\_id** (`int`, _optional_, defaults to 0) — The ID of the token in the word embedding to use as padding.
* **embedding\_size** (`int`, _optional_, defaults to 128) — The dimension of the word embedding vectors.
* **trigram\_input** (`bool`, _optional_, defaults to `True`) — Use a convolution of trigram as input.
* **use\_bottleneck** (`bool`, _optional_, defaults to `True`) — Whether to use bottleneck in BERT.
* **intra\_bottleneck\_size** (`int`, _optional_, defaults to 128) — Size of bottleneck layer output.
* **use\_bottleneck\_attention** (`bool`, _optional_, defaults to `False`) — Whether to use attention inputs from the bottleneck transformation.
* **key\_query\_shared\_bottleneck** (`bool`, _optional_, defaults to `True`) — Whether to use the same linear transformation for query\&key in the bottleneck.
* **num\_feedforward\_networks** (`int`, _optional_, defaults to 4) — Number of FFNs in a block.
* **normalization\_type** (`str`, _optional_, defaults to `"no_norm"`) — The normalization type in MobileBERT.
* **classifier\_dropout** (`float`, _optional_) — The dropout ratio for the classification head.

This is the configuration class to store the configuration of a [MobileBertModel](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.MobileBertModel) or a [TFMobileBertModel](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.TFMobileBertModel). It is used to instantiate a MobileBERT model according to the specified arguments, defining the model architecture. Instantiating a configuration with the defaults will yield a similar configuration to that of the MobileBERT [google/mobilebert-uncased](https://huggingface.co/google/mobilebert-uncased) architecture.

Configuration objects inherit from [PretrainedConfig](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/configuration#transformers.PretrainedConfig) and can be used to control the model outputs. Read the documentation from [PretrainedConfig](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/configuration#transformers.PretrainedConfig) for more information.



Examples:

Copied

```
>>> from transformers import MobileBertConfig, MobileBertModel

>>> # Initializing a MobileBERT configuration
>>> configuration = MobileBertConfig()

>>> # Initializing a model (with random weights) from the configuration above
>>> model = MobileBertModel(configuration)

>>> # Accessing the model configuration
>>> configuration = model.config
```

Attributes: pretrained\_config\_archive\_map (Dict\[str, str]): A dictionary containing all the available pre-trained checkpoints.

### MobileBertTokenizer

#### class transformers.MobileBertTokenizer

[\<source>](https://github.com/huggingface/transformers/blob/v4.34.1/src/transformers/models/mobilebert/tokenization_mobilebert.py#L65)

( vocab\_filedo\_lower\_case = Truedo\_basic\_tokenize = Truenever\_split = Noneunk\_token = '\[UNK]'sep\_token = '\[SEP]'pad\_token = '\[PAD]'cls\_token = '\[CLS]'mask\_token = '\[MASK]'tokenize\_chinese\_chars = Truestrip\_accents = None\*\*kwargs )

Parameters

* **vocab\_file** (`str`) — File containing the vocabulary.
* **do\_lower\_case** (`bool`, _optional_, defaults to `True`) — Whether or not to lowercase the input when tokenizing.
* **do\_basic\_tokenize** (`bool`, _optional_, defaults to `True`) — Whether or not to do basic tokenization before WordPiece.
* **never\_split** (`Iterable`, _optional_) — Collection of tokens which will never be split during tokenization. Only has an effect when `do_basic_tokenize=True`
* **unk\_token** (`str`, _optional_, defaults to `"[UNK]"`) — The unknown token. A token that is not in the vocabulary cannot be converted to an ID and is set to be this token instead.
* **sep\_token** (`str`, _optional_, defaults to `"[SEP]"`) — The separator token, which is used when building a sequence from multiple sequences, e.g. two sequences for sequence classification or for a text and a question for question answering. It is also used as the last token of a sequence built with special tokens.
* **pad\_token** (`str`, _optional_, defaults to `"[PAD]"`) — The token used for padding, for example when batching sequences of different lengths.
* **cls\_token** (`str`, _optional_, defaults to `"[CLS]"`) — The classifier token which is used when doing sequence classification (classification of the whole sequence instead of per-token classification). It is the first token of the sequence when built with special tokens.
* **mask\_token** (`str`, _optional_, defaults to `"[MASK]"`) — The token used for masking values. This is the token used when training this model with masked language modeling. This is the token which the model will try to predict.
*   **tokenize\_chinese\_chars** (`bool`, _optional_, defaults to `True`) — Whether or not to tokenize Chinese characters.

    This should likely be deactivated for Japanese (see this [issue](https://github.com/huggingface/transformers/issues/328)).
* **strip\_accents** (`bool`, _optional_) — Whether or not to strip all accents. If this option is not specified, then it will be determined by the value for `lowercase` (as in the original MobileBERT).

Construct a MobileBERT tokenizer. Based on WordPiece.

This tokenizer inherits from [PreTrainedTokenizer](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/tokenizer#transformers.PreTrainedTokenizer) which contains most of the main methods. Users should refer to this superclass for more information regarding those methods.

**build\_inputs\_with\_special\_tokens**

[\<source>](https://github.com/huggingface/transformers/blob/v4.34.1/src/transformers/models/mobilebert/tokenization_mobilebert.py#L198)

( token\_ids\_0: typing.List\[int]token\_ids\_1: typing.Optional\[typing.List\[int]] = None ) → `List[int]`

Parameters

* **token\_ids\_0** (`List[int]`) — List of IDs to which the special tokens will be added.
* **token\_ids\_1** (`List[int]`, _optional_) — Optional second list of IDs for sequence pairs.

Returns

`List[int]`

List of [input IDs](https://huggingface.co/docs/transformers/glossary#input-ids) with the appropriate special tokens.

Build model inputs from a sequence or a pair of sequence for sequence classification tasks by concatenating and adding special tokens. A MobileBERT sequence has the following format:

* single sequence: `[CLS] X [SEP]`
* pair of sequences: `[CLS] A [SEP] B [SEP]`

**convert\_tokens\_to\_string**

[\<source>](https://github.com/huggingface/transformers/blob/v4.34.1/src/transformers/models/mobilebert/tokenization_mobilebert.py#L193)

( tokens )

Converts a sequence of tokens (string) in a single string.

**create\_token\_type\_ids\_from\_sequences**

[\<source>](https://github.com/huggingface/transformers/blob/v4.34.1/src/transformers/models/mobilebert/tokenization_mobilebert.py#L251)

( token\_ids\_0: typing.List\[int]token\_ids\_1: typing.Optional\[typing.List\[int]] = None ) → `List[int]`

Parameters

* **token\_ids\_0** (`List[int]`) — List of IDs.
* **token\_ids\_1** (`List[int]`, _optional_) — Optional second list of IDs for sequence pairs.

Returns

`List[int]`

List of [token type IDs](https://huggingface.co/docs/transformers/glossary#token-type-ids) according to the given sequence(s).

Create a mask from the two sequences passed to be used in a sequence-pair classification task. A MobileBERT



sequence pair mask has the following format:

Copied

```
0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1
| first sequence    | second sequence |
```

If `token_ids_1` is `None`, this method only returns the first portion of the mask (0s).

**get\_special\_tokens\_mask**

[\<source>](https://github.com/huggingface/transformers/blob/v4.34.1/src/transformers/models/mobilebert/tokenization_mobilebert.py#L223)

( token\_ids\_0: typing.List\[int]token\_ids\_1: typing.Optional\[typing.List\[int]] = Nonealready\_has\_special\_tokens: bool = False ) → `List[int]`

Parameters

* **token\_ids\_0** (`List[int]`) — List of IDs.
* **token\_ids\_1** (`List[int]`, _optional_) — Optional second list of IDs for sequence pairs.
* **already\_has\_special\_tokens** (`bool`, _optional_, defaults to `False`) — Whether or not the token list is already formatted with special tokens for the model.

Returns

`List[int]`

A list of integers in the range \[0, 1]: 1 for a special token, 0 for a sequence token.

Retrieve sequence ids from a token list that has no special tokens added. This method is called when adding special tokens using the tokenizer `prepare_for_model` method.

### MobileBertTokenizerFast

#### class transformers.MobileBertTokenizerFast

[\<source>](https://github.com/huggingface/transformers/blob/v4.34.1/src/transformers/models/mobilebert/tokenization_mobilebert_fast.py#L46)

( vocab\_file = Nonetokenizer\_file = Nonedo\_lower\_case = Trueunk\_token = '\[UNK]'sep\_token = '\[SEP]'pad\_token = '\[PAD]'cls\_token = '\[CLS]'mask\_token = '\[MASK]'tokenize\_chinese\_chars = Truestrip\_accents = None\*\*kwargs )

Parameters

* **vocab\_file** (`str`) — File containing the vocabulary.
* **do\_lower\_case** (`bool`, _optional_, defaults to `True`) — Whether or not to lowercase the input when tokenizing.
* **unk\_token** (`str`, _optional_, defaults to `"[UNK]"`) — The unknown token. A token that is not in the vocabulary cannot be converted to an ID and is set to be this token instead.
* **sep\_token** (`str`, _optional_, defaults to `"[SEP]"`) — The separator token, which is used when building a sequence from multiple sequences, e.g. two sequences for sequence classification or for a text and a question for question answering. It is also used as the last token of a sequence built with special tokens.
* **pad\_token** (`str`, _optional_, defaults to `"[PAD]"`) — The token used for padding, for example when batching sequences of different lengths.
* **cls\_token** (`str`, _optional_, defaults to `"[CLS]"`) — The classifier token which is used when doing sequence classification (classification of the whole sequence instead of per-token classification). It is the first token of the sequence when built with special tokens.
* **mask\_token** (`str`, _optional_, defaults to `"[MASK]"`) — The token used for masking values. This is the token used when training this model with masked language modeling. This is the token which the model will try to predict.
* **clean\_text** (`bool`, _optional_, defaults to `True`) — Whether or not to clean the text before tokenization by removing any control characters and replacing all whitespaces by the classic one.
* **tokenize\_chinese\_chars** (`bool`, _optional_, defaults to `True`) — Whether or not to tokenize Chinese characters. This should likely be deactivated for Japanese (see [this issue](https://github.com/huggingface/transformers/issues/328)).
* **strip\_accents** (`bool`, _optional_) — Whether or not to strip all accents. If this option is not specified, then it will be determined by the value for `lowercase` (as in the original MobileBERT).
* **wordpieces\_prefix** (`str`, _optional_, defaults to `"##"`) — The prefix for subwords.

Construct a “fast” MobileBERT tokenizer (backed by BOINCAI’s _tokenizers_ library). Based on WordPiece.

This tokenizer inherits from [PreTrainedTokenizerFast](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/tokenizer#transformers.PreTrainedTokenizerFast) which contains most of the main methods. Users should refer to this superclass for more information regarding those methods.

**build\_inputs\_with\_special\_tokens**

[\<source>](https://github.com/huggingface/transformers/blob/v4.34.1/src/transformers/models/mobilebert/tokenization_mobilebert_fast.py#L134)

( token\_ids\_0token\_ids\_1 = None ) → `List[int]`

Parameters

* **token\_ids\_0** (`List[int]`) — List of IDs to which the special tokens will be added.
* **token\_ids\_1** (`List[int]`, _optional_) — Optional second list of IDs for sequence pairs.

Returns

`List[int]`

List of [input IDs](https://huggingface.co/docs/transformers/glossary#input-ids) with the appropriate special tokens.

Build model inputs from a sequence or a pair of sequence for sequence classification tasks by concatenating and adding special tokens. A MobileBERT sequence has the following format:

* single sequence: `[CLS] X [SEP]`
* pair of sequences: `[CLS] A [SEP] B [SEP]`

**create\_token\_type\_ids\_from\_sequences**

[\<source>](https://github.com/huggingface/transformers/blob/v4.34.1/src/transformers/models/mobilebert/tokenization_mobilebert_fast.py#L158)

( token\_ids\_0: typing.List\[int]token\_ids\_1: typing.Optional\[typing.List\[int]] = None ) → `List[int]`

Parameters

* **token\_ids\_0** (`List[int]`) — List of IDs.
* **token\_ids\_1** (`List[int]`, _optional_) — Optional second list of IDs for sequence pairs.

Returns

`List[int]`

List of [token type IDs](https://huggingface.co/docs/transformers/glossary#token-type-ids) according to the given sequence(s).

Create a mask from the two sequences passed to be used in a sequence-pair classification task. A MobileBERT



sequence pair mask has the following format:

Copied

```
0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1
| first sequence    | second sequence |
```

If `token_ids_1` is `None`, this method only returns the first portion of the mask (0s).

### MobileBert specific outputs

#### class transformers.models.mobilebert.modeling\_mobilebert.MobileBertForPreTrainingOutput

[\<source>](https://github.com/huggingface/transformers/blob/v4.34.1/src/transformers/models/mobilebert/modeling_mobilebert.py#L710)

( loss: typing.Optional\[torch.FloatTensor] = Noneprediction\_logits: FloatTensor = Noneseq\_relationship\_logits: FloatTensor = Nonehidden\_states: typing.Optional\[typing.Tuple\[torch.FloatTensor]] = Noneattentions: typing.Optional\[typing.Tuple\[torch.FloatTensor]] = None )

Parameters

* **loss** (_optional_, returned when `labels` is provided, `torch.FloatTensor` of shape `(1,)`) — Total loss as the sum of the masked language modeling loss and the next sequence prediction (classification) loss.
* **prediction\_logits** (`torch.FloatTensor` of shape `(batch_size, sequence_length, config.vocab_size)`) — Prediction scores of the language modeling head (scores for each vocabulary token before SoftMax).
* **seq\_relationship\_logits** (`torch.FloatTensor` of shape `(batch_size, 2)`) — Prediction scores of the next sequence prediction (classification) head (scores of True/False continuation before SoftMax).
*   **hidden\_states** (`tuple(torch.FloatTensor)`, _optional_, returned when `output_hidden_states=True` is passed or when `config.output_hidden_states=True`) — Tuple of `torch.FloatTensor` (one for the output of the embeddings + one for the output of each layer) of shape `(batch_size, sequence_length, hidden_size)`.

    Hidden-states of the model at the output of each layer plus the initial embedding outputs.
*   **attentions** (`tuple(torch.FloatTensor)`, _optional_, returned when `output_attentions=True` is passed or when `config.output_attentions=True`) — Tuple of `torch.FloatTensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length, sequence_length)`.

    Attentions weights after the attention softmax, used to compute the weighted average in the self-attention heads.

Output type of [MobileBertForPreTraining](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.MobileBertForPreTraining).

#### class transformers.models.mobilebert.modeling\_tf\_mobilebert.TFMobileBertForPreTrainingOutput

[\<source>](https://github.com/huggingface/transformers/blob/v4.34.1/src/transformers/models/mobilebert/modeling_tf_mobilebert.py#L829)

( loss: tf.Tensor | None = Noneprediction\_logits: tf.Tensor = Noneseq\_relationship\_logits: tf.Tensor = Nonehidden\_states: Tuple\[tf.Tensor] | None = Noneattentions: Tuple\[tf.Tensor] | None = None )

Parameters

* **prediction\_logits** (`tf.Tensor` of shape `(batch_size, sequence_length, config.vocab_size)`) — Prediction scores of the language modeling head (scores for each vocabulary token before SoftMax).
* **seq\_relationship\_logits** (`tf.Tensor` of shape `(batch_size, 2)`) — Prediction scores of the next sequence prediction (classification) head (scores of True/False continuation before SoftMax).
*   **hidden\_states** (`tuple(tf.Tensor)`, _optional_, returned when `output_hidden_states=True` is passed or when `config.output_hidden_states=True`) — Tuple of `tf.Tensor` (one for the output of the embeddings + one for the output of each layer) of shape `(batch_size, sequence_length, hidden_size)`.

    Hidden-states of the model at the output of each layer plus the initial embedding outputs.
*   **attentions** (`tuple(tf.Tensor)`, _optional_, returned when `output_attentions=True` is passed or when `config.output_attentions=True`) — Tuple of `tf.Tensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length, sequence_length)`.

    Attentions weights after the attention softmax, used to compute the weighted average in the self-attention heads.

Output type of [TFMobileBertForPreTraining](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.TFMobileBertForPreTraining).

### MobileBertModel

#### class transformers.MobileBertModel

[\<source>](https://github.com/huggingface/transformers/blob/v4.34.1/src/transformers/models/mobilebert/modeling_mobilebert.py#L813)

( configadd\_pooling\_layer = True )

Parameters

* **config** ([MobileBertConfig](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.MobileBertConfig)) — Model configuration class with all the parameters of the model. Initializing with a config file does not load the weights associated with the model, only the configuration. Check out the [from\_pretrained()](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/model#transformers.PreTrainedModel.from_pretrained) method to load the model weights.

The bare MobileBert Model transformer outputting raw hidden-states without any specific head on top.

This model inherits from [PreTrainedModel](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/model#transformers.PreTrainedModel). Check the superclass documentation for the generic methods the library implements for all its model (such as downloading or saving, resizing the input embeddings, pruning heads etc.)

This model is also a PyTorch [torch.nn.Module](https://pytorch.org/docs/stable/nn.html#torch.nn.Module) subclass. Use it as a regular PyTorch Module and refer to the PyTorch documentation for all matter related to general usage and behavior.

[https://arxiv.org/pdf/2004.02984.pdf](https://arxiv.org/pdf/2004.02984.pdf)

**forward**

[\<source>](https://github.com/huggingface/transformers/blob/v4.34.1/src/transformers/models/mobilebert/modeling_mobilebert.py#L843)

( input\_ids: typing.Optional\[torch.LongTensor] = Noneattention\_mask: typing.Optional\[torch.FloatTensor] = Nonetoken\_type\_ids: typing.Optional\[torch.LongTensor] = Noneposition\_ids: typing.Optional\[torch.LongTensor] = Nonehead\_mask: typing.Optional\[torch.FloatTensor] = Noneinputs\_embeds: typing.Optional\[torch.FloatTensor] = Noneoutput\_hidden\_states: typing.Optional\[bool] = Noneoutput\_attentions: typing.Optional\[bool] = Nonereturn\_dict: typing.Optional\[bool] = None ) → [transformers.modeling\_outputs.BaseModelOutputWithPooling](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.modeling_outputs.BaseModelOutputWithPooling) or `tuple(torch.FloatTensor)`

Parameters

*   **input\_ids** (`torch.LongTensor` of shape `(batch_size, sequence_length)`) — Indices of input sequence tokens in the vocabulary.

    Indices can be obtained using [AutoTokenizer](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/auto#transformers.AutoTokenizer). See [PreTrainedTokenizer.encode()](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/tokenizer#transformers.PreTrainedTokenizerFast.encode) and [PreTrainedTokenizer.**call**()](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/vits#transformers.VitsTokenizer.__call__) for details.

    [What are input IDs?](https://huggingface.co/docs/transformers/glossary#input-ids)
*   **attention\_mask** (`torch.FloatTensor` of shape `(batch_size, sequence_length)`, _optional_) — Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`:

    * 1 for tokens that are **not masked**,
    * 0 for tokens that are **masked**.

    [What are attention masks?](https://huggingface.co/docs/transformers/glossary#attention-mask)
*   **token\_type\_ids** (`torch.LongTensor` of shape `(batch_size, sequence_length)`, _optional_) — Segment token indices to indicate first and second portions of the inputs. Indices are selected in `[0, 1]`:

    * 0 corresponds to a _sentence A_ token,
    * 1 corresponds to a _sentence B_ token.

    [What are token type IDs?](https://huggingface.co/docs/transformers/glossary#token-type-ids)
*   **position\_ids** (`torch.LongTensor` of shape `(batch_size, sequence_length)`, _optional_) — Indices of positions of each input sequence tokens in the position embeddings. Selected in the range `[0, config.max_position_embeddings - 1]`.

    [What are position IDs?](https://huggingface.co/docs/transformers/glossary#position-ids)
* **head\_mask** (`torch.FloatTensor` of shape `(num_heads,)` or `(num_layers, num_heads)`, _optional_) — Mask to nullify selected heads of the self-attention modules. Mask values selected in `[0, 1]`:
  * 1 indicates the head is **not masked**,
  * 0 indicates the head is **masked**.
* **inputs\_embeds** (`torch.FloatTensor` of shape `(batch_size, sequence_length, hidden_size)`, _optional_) — Optionally, instead of passing `input_ids` you can choose to directly pass an embedded representation. This is useful if you want more control over how to convert `input_ids` indices into associated vectors than the model’s internal embedding lookup matrix.
* **output\_attentions** (`bool`, _optional_) — Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned tensors for more detail.
* **output\_hidden\_states** (`bool`, _optional_) — Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for more detail.
* **return\_dict** (`bool`, _optional_) — Whether or not to return a [ModelOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.utils.ModelOutput) instead of a plain tuple.

Returns

[transformers.modeling\_outputs.BaseModelOutputWithPooling](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.modeling_outputs.BaseModelOutputWithPooling) or `tuple(torch.FloatTensor)`

A [transformers.modeling\_outputs.BaseModelOutputWithPooling](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.modeling_outputs.BaseModelOutputWithPooling) or a tuple of `torch.FloatTensor` (if `return_dict=False` is passed or when `config.return_dict=False`) comprising various elements depending on the configuration ([MobileBertConfig](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.MobileBertConfig)) and inputs.

* **last\_hidden\_state** (`torch.FloatTensor` of shape `(batch_size, sequence_length, hidden_size)`) — Sequence of hidden-states at the output of the last layer of the model.
* **pooler\_output** (`torch.FloatTensor` of shape `(batch_size, hidden_size)`) — Last layer hidden-state of the first token of the sequence (classification token) after further processing through the layers used for the auxiliary pretraining task. E.g. for BERT-family of models, this returns the classification token after processing through a linear layer and a tanh activation function. The linear layer weights are trained from the next sentence prediction (classification) objective during pretraining.
*   **hidden\_states** (`tuple(torch.FloatTensor)`, _optional_, returned when `output_hidden_states=True` is passed or when `config.output_hidden_states=True`) — Tuple of `torch.FloatTensor` (one for the output of the embeddings, if the model has an embedding layer, + one for the output of each layer) of shape `(batch_size, sequence_length, hidden_size)`.

    Hidden-states of the model at the output of each layer plus the optional initial embedding outputs.
*   **attentions** (`tuple(torch.FloatTensor)`, _optional_, returned when `output_attentions=True` is passed or when `config.output_attentions=True`) — Tuple of `torch.FloatTensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length, sequence_length)`.

    Attentions weights after the attention softmax, used to compute the weighted average in the self-attention heads.

The [MobileBertModel](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.MobileBertModel) forward method, overrides the `__call__` special method.

Although the recipe for forward pass needs to be defined within this function, one should call the `Module` instance afterwards instead of this since the former takes care of running the pre and post processing steps while the latter silently ignores them.



Example:

Copied

```
>>> from transformers import AutoTokenizer, MobileBertModel
>>> import torch

>>> tokenizer = AutoTokenizer.from_pretrained("google/mobilebert-uncased")
>>> model = MobileBertModel.from_pretrained("google/mobilebert-uncased")

>>> inputs = tokenizer("Hello, my dog is cute", return_tensors="pt")
>>> outputs = model(**inputs)

>>> last_hidden_states = outputs.last_hidden_state
```

### MobileBertForPreTraining

#### class transformers.MobileBertForPreTraining

[\<source>](https://github.com/huggingface/transformers/blob/v4.34.1/src/transformers/models/mobilebert/modeling_mobilebert.py#L927)

( config )

Parameters

* **config** ([MobileBertConfig](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.MobileBertConfig)) — Model configuration class with all the parameters of the model. Initializing with a config file does not load the weights associated with the model, only the configuration. Check out the [from\_pretrained()](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/model#transformers.PreTrainedModel.from_pretrained) method to load the model weights.

MobileBert Model with two heads on top as done during the pretraining: a `masked language modeling` head and a `next sentence prediction (classification)` head.

This model inherits from [PreTrainedModel](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/model#transformers.PreTrainedModel). Check the superclass documentation for the generic methods the library implements for all its model (such as downloading or saving, resizing the input embeddings, pruning heads etc.)

This model is also a PyTorch [torch.nn.Module](https://pytorch.org/docs/stable/nn.html#torch.nn.Module) subclass. Use it as a regular PyTorch Module and refer to the PyTorch documentation for all matter related to general usage and behavior.

**forward**

[\<source>](https://github.com/huggingface/transformers/blob/v4.34.1/src/transformers/models/mobilebert/modeling_mobilebert.py#L952)

( input\_ids: typing.Optional\[torch.LongTensor] = Noneattention\_mask: typing.Optional\[torch.FloatTensor] = Nonetoken\_type\_ids: typing.Optional\[torch.LongTensor] = Noneposition\_ids: typing.Optional\[torch.LongTensor] = Nonehead\_mask: typing.Optional\[torch.FloatTensor] = Noneinputs\_embeds: typing.Optional\[torch.FloatTensor] = Nonelabels: typing.Optional\[torch.LongTensor] = Nonenext\_sentence\_label: typing.Optional\[torch.LongTensor] = Noneoutput\_attentions: typing.Optional\[torch.FloatTensor] = Noneoutput\_hidden\_states: typing.Optional\[torch.FloatTensor] = Nonereturn\_dict: typing.Optional\[torch.FloatTensor] = None ) → [transformers.models.mobilebert.modeling\_mobilebert.MobileBertForPreTrainingOutput](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.models.mobilebert.modeling_mobilebert.MobileBertForPreTrainingOutput) or `tuple(torch.FloatTensor)`

Parameters

*   **input\_ids** (`torch.LongTensor` of shape `(batch_size, sequence_length)`) — Indices of input sequence tokens in the vocabulary.

    Indices can be obtained using [AutoTokenizer](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/auto#transformers.AutoTokenizer). See [PreTrainedTokenizer.encode()](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/tokenizer#transformers.PreTrainedTokenizerFast.encode) and [PreTrainedTokenizer.**call**()](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/vits#transformers.VitsTokenizer.__call__) for details.

    [What are input IDs?](https://huggingface.co/docs/transformers/glossary#input-ids)
*   **attention\_mask** (`torch.FloatTensor` of shape `(batch_size, sequence_length)`, _optional_) — Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`:

    * 1 for tokens that are **not masked**,
    * 0 for tokens that are **masked**.

    [What are attention masks?](https://huggingface.co/docs/transformers/glossary#attention-mask)
*   **token\_type\_ids** (`torch.LongTensor` of shape `(batch_size, sequence_length)`, _optional_) — Segment token indices to indicate first and second portions of the inputs. Indices are selected in `[0, 1]`:

    * 0 corresponds to a _sentence A_ token,
    * 1 corresponds to a _sentence B_ token.

    [What are token type IDs?](https://huggingface.co/docs/transformers/glossary#token-type-ids)
*   **position\_ids** (`torch.LongTensor` of shape `(batch_size, sequence_length)`, _optional_) — Indices of positions of each input sequence tokens in the position embeddings. Selected in the range `[0, config.max_position_embeddings - 1]`.

    [What are position IDs?](https://huggingface.co/docs/transformers/glossary#position-ids)
* **head\_mask** (`torch.FloatTensor` of shape `(num_heads,)` or `(num_layers, num_heads)`, _optional_) — Mask to nullify selected heads of the self-attention modules. Mask values selected in `[0, 1]`:
  * 1 indicates the head is **not masked**,
  * 0 indicates the head is **masked**.
* **inputs\_embeds** (`torch.FloatTensor` of shape `(batch_size, sequence_length, hidden_size)`, _optional_) — Optionally, instead of passing `input_ids` you can choose to directly pass an embedded representation. This is useful if you want more control over how to convert `input_ids` indices into associated vectors than the model’s internal embedding lookup matrix.
* **output\_attentions** (`bool`, _optional_) — Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned tensors for more detail.
* **output\_hidden\_states** (`bool`, _optional_) — Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for more detail.
* **return\_dict** (`bool`, _optional_) — Whether or not to return a [ModelOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.utils.ModelOutput) instead of a plain tuple.
* **labels** (`torch.LongTensor` of shape `(batch_size, sequence_length)`, _optional_) — Labels for computing the masked language modeling loss. Indices should be in `[-100, 0, ..., config.vocab_size]` (see `input_ids` docstring) Tokens with indices set to `-100` are ignored (masked), the loss is only computed for the tokens with labels in `[0, ..., config.vocab_size]`
* **next\_sentence\_label** (`torch.LongTensor` of shape `(batch_size,)`, _optional_) — Labels for computing the next sequence prediction (classification) loss. Input should be a sequence pair (see `input_ids` docstring) Indices should be in `[0, 1]`:
  * 0 indicates sequence B is a continuation of sequence A,
  * 1 indicates sequence B is a random sequence.

Returns

[transformers.models.mobilebert.modeling\_mobilebert.MobileBertForPreTrainingOutput](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.models.mobilebert.modeling_mobilebert.MobileBertForPreTrainingOutput) or `tuple(torch.FloatTensor)`

A [transformers.models.mobilebert.modeling\_mobilebert.MobileBertForPreTrainingOutput](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.models.mobilebert.modeling_mobilebert.MobileBertForPreTrainingOutput) or a tuple of `torch.FloatTensor` (if `return_dict=False` is passed or when `config.return_dict=False`) comprising various elements depending on the configuration ([MobileBertConfig](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.MobileBertConfig)) and inputs.

* **loss** (_optional_, returned when `labels` is provided, `torch.FloatTensor` of shape `(1,)`) — Total loss as the sum of the masked language modeling loss and the next sequence prediction (classification) loss.
* **prediction\_logits** (`torch.FloatTensor` of shape `(batch_size, sequence_length, config.vocab_size)`) — Prediction scores of the language modeling head (scores for each vocabulary token before SoftMax).
* **seq\_relationship\_logits** (`torch.FloatTensor` of shape `(batch_size, 2)`) — Prediction scores of the next sequence prediction (classification) head (scores of True/False continuation before SoftMax).
*   **hidden\_states** (`tuple(torch.FloatTensor)`, _optional_, returned when `output_hidden_states=True` is passed or when `config.output_hidden_states=True`) — Tuple of `torch.FloatTensor` (one for the output of the embeddings + one for the output of each layer) of shape `(batch_size, sequence_length, hidden_size)`.

    Hidden-states of the model at the output of each layer plus the initial embedding outputs.
*   **attentions** (`tuple(torch.FloatTensor)`, _optional_, returned when `output_attentions=True` is passed or when `config.output_attentions=True`) — Tuple of `torch.FloatTensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length, sequence_length)`.

    Attentions weights after the attention softmax, used to compute the weighted average in the self-attention heads.

The [MobileBertForPreTraining](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.MobileBertForPreTraining) forward method, overrides the `__call__` special method.

Although the recipe for forward pass needs to be defined within this function, one should call the `Module` instance afterwards instead of this since the former takes care of running the pre and post processing steps while the latter silently ignores them.



Examples:

Copied

```
>>> from transformers import AutoTokenizer, MobileBertForPreTraining
>>> import torch

>>> tokenizer = AutoTokenizer.from_pretrained("google/mobilebert-uncased")
>>> model = MobileBertForPreTraining.from_pretrained("google/mobilebert-uncased")

>>> input_ids = torch.tensor(tokenizer.encode("Hello, my dog is cute", add_special_tokens=True)).unsqueeze(0)
>>> # Batch size 1
>>> outputs = model(input_ids)

>>> prediction_logits = outputs.prediction_logits
>>> seq_relationship_logits = outputs.seq_relationship_logits
```

### MobileBertForMaskedLM

#### class transformers.MobileBertForMaskedLM

[\<source>](https://github.com/huggingface/transformers/blob/v4.34.1/src/transformers/models/mobilebert/modeling_mobilebert.py#L1035)

( config )

Parameters

* **config** ([MobileBertConfig](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.MobileBertConfig)) — Model configuration class with all the parameters of the model. Initializing with a config file does not load the weights associated with the model, only the configuration. Check out the [from\_pretrained()](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/model#transformers.PreTrainedModel.from_pretrained) method to load the model weights.

MobileBert Model with a `language modeling` head on top.

This model inherits from [PreTrainedModel](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/model#transformers.PreTrainedModel). Check the superclass documentation for the generic methods the library implements for all its model (such as downloading or saving, resizing the input embeddings, pruning heads etc.)

This model is also a PyTorch [torch.nn.Module](https://pytorch.org/docs/stable/nn.html#torch.nn.Module) subclass. Use it as a regular PyTorch Module and refer to the PyTorch documentation for all matter related to general usage and behavior.

**forward**

[\<source>](https://github.com/huggingface/transformers/blob/v4.34.1/src/transformers/models/mobilebert/modeling_mobilebert.py#L1060)

( input\_ids: typing.Optional\[torch.LongTensor] = Noneattention\_mask: typing.Optional\[torch.FloatTensor] = Nonetoken\_type\_ids: typing.Optional\[torch.LongTensor] = Noneposition\_ids: typing.Optional\[torch.LongTensor] = Nonehead\_mask: typing.Optional\[torch.FloatTensor] = Noneinputs\_embeds: typing.Optional\[torch.FloatTensor] = Nonelabels: typing.Optional\[torch.LongTensor] = Noneoutput\_attentions: typing.Optional\[bool] = Noneoutput\_hidden\_states: typing.Optional\[bool] = Nonereturn\_dict: typing.Optional\[bool] = None ) → [transformers.modeling\_outputs.MaskedLMOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.modeling_outputs.MaskedLMOutput) or `tuple(torch.FloatTensor)`

Parameters

*   **input\_ids** (`torch.LongTensor` of shape `(batch_size, sequence_length)`) — Indices of input sequence tokens in the vocabulary.

    Indices can be obtained using [AutoTokenizer](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/auto#transformers.AutoTokenizer). See [PreTrainedTokenizer.encode()](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/tokenizer#transformers.PreTrainedTokenizerFast.encode) and [PreTrainedTokenizer.**call**()](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/vits#transformers.VitsTokenizer.__call__) for details.

    [What are input IDs?](https://huggingface.co/docs/transformers/glossary#input-ids)
*   **attention\_mask** (`torch.FloatTensor` of shape `(batch_size, sequence_length)`, _optional_) — Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`:

    * 1 for tokens that are **not masked**,
    * 0 for tokens that are **masked**.

    [What are attention masks?](https://huggingface.co/docs/transformers/glossary#attention-mask)
*   **token\_type\_ids** (`torch.LongTensor` of shape `(batch_size, sequence_length)`, _optional_) — Segment token indices to indicate first and second portions of the inputs. Indices are selected in `[0, 1]`:

    * 0 corresponds to a _sentence A_ token,
    * 1 corresponds to a _sentence B_ token.

    [What are token type IDs?](https://huggingface.co/docs/transformers/glossary#token-type-ids)
*   **position\_ids** (`torch.LongTensor` of shape `(batch_size, sequence_length)`, _optional_) — Indices of positions of each input sequence tokens in the position embeddings. Selected in the range `[0, config.max_position_embeddings - 1]`.

    [What are position IDs?](https://huggingface.co/docs/transformers/glossary#position-ids)
* **head\_mask** (`torch.FloatTensor` of shape `(num_heads,)` or `(num_layers, num_heads)`, _optional_) — Mask to nullify selected heads of the self-attention modules. Mask values selected in `[0, 1]`:
  * 1 indicates the head is **not masked**,
  * 0 indicates the head is **masked**.
* **inputs\_embeds** (`torch.FloatTensor` of shape `(batch_size, sequence_length, hidden_size)`, _optional_) — Optionally, instead of passing `input_ids` you can choose to directly pass an embedded representation. This is useful if you want more control over how to convert `input_ids` indices into associated vectors than the model’s internal embedding lookup matrix.
* **output\_attentions** (`bool`, _optional_) — Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned tensors for more detail.
* **output\_hidden\_states** (`bool`, _optional_) — Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for more detail.
* **return\_dict** (`bool`, _optional_) — Whether or not to return a [ModelOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.utils.ModelOutput) instead of a plain tuple.
* **labels** (`torch.LongTensor` of shape `(batch_size, sequence_length)`, _optional_) — Labels for computing the masked language modeling loss. Indices should be in `[-100, 0, ..., config.vocab_size]` (see `input_ids` docstring) Tokens with indices set to `-100` are ignored (masked), the loss is only computed for the tokens with labels in `[0, ..., config.vocab_size]`

Returns

[transformers.modeling\_outputs.MaskedLMOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.modeling_outputs.MaskedLMOutput) or `tuple(torch.FloatTensor)`

A [transformers.modeling\_outputs.MaskedLMOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.modeling_outputs.MaskedLMOutput) or a tuple of `torch.FloatTensor` (if `return_dict=False` is passed or when `config.return_dict=False`) comprising various elements depending on the configuration ([MobileBertConfig](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.MobileBertConfig)) and inputs.

* **loss** (`torch.FloatTensor` of shape `(1,)`, _optional_, returned when `labels` is provided) — Masked language modeling (MLM) loss.
* **logits** (`torch.FloatTensor` of shape `(batch_size, sequence_length, config.vocab_size)`) — Prediction scores of the language modeling head (scores for each vocabulary token before SoftMax).
*   **hidden\_states** (`tuple(torch.FloatTensor)`, _optional_, returned when `output_hidden_states=True` is passed or when `config.output_hidden_states=True`) — Tuple of `torch.FloatTensor` (one for the output of the embeddings, if the model has an embedding layer, + one for the output of each layer) of shape `(batch_size, sequence_length, hidden_size)`.

    Hidden-states of the model at the output of each layer plus the optional initial embedding outputs.
*   **attentions** (`tuple(torch.FloatTensor)`, _optional_, returned when `output_attentions=True` is passed or when `config.output_attentions=True`) — Tuple of `torch.FloatTensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length, sequence_length)`.

    Attentions weights after the attention softmax, used to compute the weighted average in the self-attention heads.

The [MobileBertForMaskedLM](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.MobileBertForMaskedLM) forward method, overrides the `__call__` special method.

Although the recipe for forward pass needs to be defined within this function, one should call the `Module` instance afterwards instead of this since the former takes care of running the pre and post processing steps while the latter silently ignores them.



Example:

Copied

```
>>> from transformers import AutoTokenizer, MobileBertForMaskedLM
>>> import torch

>>> tokenizer = AutoTokenizer.from_pretrained("google/mobilebert-uncased")
>>> model = MobileBertForMaskedLM.from_pretrained("google/mobilebert-uncased")

>>> inputs = tokenizer("The capital of France is [MASK].", return_tensors="pt")

>>> with torch.no_grad():
...     logits = model(**inputs).logits

>>> # retrieve index of [MASK]
>>> mask_token_index = (inputs.input_ids == tokenizer.mask_token_id)[0].nonzero(as_tuple=True)[0]

>>> predicted_token_id = logits[0, mask_token_index].argmax(axis=-1)
>>> tokenizer.decode(predicted_token_id)
'paris'

>>> labels = tokenizer("The capital of France is Paris.", return_tensors="pt")["input_ids"]
>>> # mask labels of non-[MASK] tokens
>>> labels = torch.where(inputs.input_ids == tokenizer.mask_token_id, labels, -100)

>>> outputs = model(**inputs, labels=labels)
>>> round(outputs.loss.item(), 2)
0.57
```

### MobileBertForNextSentencePrediction

#### class transformers.MobileBertForNextSentencePrediction

[\<source>](https://github.com/huggingface/transformers/blob/v4.34.1/src/transformers/models/mobilebert/modeling_mobilebert.py#L1135)

( config )

Parameters

* **config** ([MobileBertConfig](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.MobileBertConfig)) — Model configuration class with all the parameters of the model. Initializing with a config file does not load the weights associated with the model, only the configuration. Check out the [from\_pretrained()](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/model#transformers.PreTrainedModel.from_pretrained) method to load the model weights.

MobileBert Model with a `next sentence prediction (classification)` head on top.

This model inherits from [PreTrainedModel](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/model#transformers.PreTrainedModel). Check the superclass documentation for the generic methods the library implements for all its model (such as downloading or saving, resizing the input embeddings, pruning heads etc.)

This model is also a PyTorch [torch.nn.Module](https://pytorch.org/docs/stable/nn.html#torch.nn.Module) subclass. Use it as a regular PyTorch Module and refer to the PyTorch documentation for all matter related to general usage and behavior.

**forward**

[\<source>](https://github.com/huggingface/transformers/blob/v4.34.1/src/transformers/models/mobilebert/modeling_mobilebert.py#L1145)

( input\_ids: typing.Optional\[torch.LongTensor] = Noneattention\_mask: typing.Optional\[torch.FloatTensor] = Nonetoken\_type\_ids: typing.Optional\[torch.LongTensor] = Noneposition\_ids: typing.Optional\[torch.LongTensor] = Nonehead\_mask: typing.Optional\[torch.FloatTensor] = Noneinputs\_embeds: typing.Optional\[torch.FloatTensor] = Nonelabels: typing.Optional\[torch.LongTensor] = Noneoutput\_attentions: typing.Optional\[bool] = Noneoutput\_hidden\_states: typing.Optional\[bool] = Nonereturn\_dict: typing.Optional\[bool] = None\*\*kwargs ) → [transformers.modeling\_outputs.NextSentencePredictorOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.modeling_outputs.NextSentencePredictorOutput) or `tuple(torch.FloatTensor)`

Parameters

*   **input\_ids** (`torch.LongTensor` of shape `(batch_size, sequence_length)`) — Indices of input sequence tokens in the vocabulary.

    Indices can be obtained using [AutoTokenizer](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/auto#transformers.AutoTokenizer). See [PreTrainedTokenizer.encode()](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/tokenizer#transformers.PreTrainedTokenizerFast.encode) and [PreTrainedTokenizer.**call**()](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/vits#transformers.VitsTokenizer.__call__) for details.

    [What are input IDs?](https://huggingface.co/docs/transformers/glossary#input-ids)
*   **attention\_mask** (`torch.FloatTensor` of shape `(batch_size, sequence_length)`, _optional_) — Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`:

    * 1 for tokens that are **not masked**,
    * 0 for tokens that are **masked**.

    [What are attention masks?](https://huggingface.co/docs/transformers/glossary#attention-mask)
*   **token\_type\_ids** (`torch.LongTensor` of shape `(batch_size, sequence_length)`, _optional_) — Segment token indices to indicate first and second portions of the inputs. Indices are selected in `[0, 1]`:

    * 0 corresponds to a _sentence A_ token,
    * 1 corresponds to a _sentence B_ token.

    [What are token type IDs?](https://huggingface.co/docs/transformers/glossary#token-type-ids)
*   **position\_ids** (`torch.LongTensor` of shape `(batch_size, sequence_length)`, _optional_) — Indices of positions of each input sequence tokens in the position embeddings. Selected in the range `[0, config.max_position_embeddings - 1]`.

    [What are position IDs?](https://huggingface.co/docs/transformers/glossary#position-ids)
* **head\_mask** (`torch.FloatTensor` of shape `(num_heads,)` or `(num_layers, num_heads)`, _optional_) — Mask to nullify selected heads of the self-attention modules. Mask values selected in `[0, 1]`:
  * 1 indicates the head is **not masked**,
  * 0 indicates the head is **masked**.
* **inputs\_embeds** (`torch.FloatTensor` of shape `(batch_size, sequence_length, hidden_size)`, _optional_) — Optionally, instead of passing `input_ids` you can choose to directly pass an embedded representation. This is useful if you want more control over how to convert `input_ids` indices into associated vectors than the model’s internal embedding lookup matrix.
* **output\_attentions** (`bool`, _optional_) — Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned tensors for more detail.
* **output\_hidden\_states** (`bool`, _optional_) — Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for more detail.
* **return\_dict** (`bool`, _optional_) — Whether or not to return a [ModelOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.utils.ModelOutput) instead of a plain tuple.
* **labels** (`torch.LongTensor` of shape `(batch_size,)`, _optional_) — Labels for computing the next sequence prediction (classification) loss. Input should be a sequence pair (see `input_ids` docstring) Indices should be in `[0, 1]`.
  * 0 indicates sequence B is a continuation of sequence A,
  * 1 indicates sequence B is a random sequence.

Returns

[transformers.modeling\_outputs.NextSentencePredictorOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.modeling_outputs.NextSentencePredictorOutput) or `tuple(torch.FloatTensor)`

A [transformers.modeling\_outputs.NextSentencePredictorOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.modeling_outputs.NextSentencePredictorOutput) or a tuple of `torch.FloatTensor` (if `return_dict=False` is passed or when `config.return_dict=False`) comprising various elements depending on the configuration ([MobileBertConfig](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.MobileBertConfig)) and inputs.

* **loss** (`torch.FloatTensor` of shape `(1,)`, _optional_, returned when `next_sentence_label` is provided) — Next sequence prediction (classification) loss.
* **logits** (`torch.FloatTensor` of shape `(batch_size, 2)`) — Prediction scores of the next sequence prediction (classification) head (scores of True/False continuation before SoftMax).
*   **hidden\_states** (`tuple(torch.FloatTensor)`, _optional_, returned when `output_hidden_states=True` is passed or when `config.output_hidden_states=True`) — Tuple of `torch.FloatTensor` (one for the output of the embeddings, if the model has an embedding layer, + one for the output of each layer) of shape `(batch_size, sequence_length, hidden_size)`.

    Hidden-states of the model at the output of each layer plus the optional initial embedding outputs.
*   **attentions** (`tuple(torch.FloatTensor)`, _optional_, returned when `output_attentions=True` is passed or when `config.output_attentions=True`) — Tuple of `torch.FloatTensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length, sequence_length)`.

    Attentions weights after the attention softmax, used to compute the weighted average in the self-attention heads.

The [MobileBertForNextSentencePrediction](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.MobileBertForNextSentencePrediction) forward method, overrides the `__call__` special method.

Although the recipe for forward pass needs to be defined within this function, one should call the `Module` instance afterwards instead of this since the former takes care of running the pre and post processing steps while the latter silently ignores them.



Examples:

Copied

```
>>> from transformers import AutoTokenizer, MobileBertForNextSentencePrediction
>>> import torch

>>> tokenizer = AutoTokenizer.from_pretrained("google/mobilebert-uncased")
>>> model = MobileBertForNextSentencePrediction.from_pretrained("google/mobilebert-uncased")

>>> prompt = "In Italy, pizza served in formal settings, such as at a restaurant, is presented unsliced."
>>> next_sentence = "The sky is blue due to the shorter wavelength of blue light."
>>> encoding = tokenizer(prompt, next_sentence, return_tensors="pt")

>>> outputs = model(**encoding, labels=torch.LongTensor([1]))
>>> loss = outputs.loss
>>> logits = outputs.logits
```

### MobileBertForSequenceClassification

#### class transformers.MobileBertForSequenceClassification

[\<source>](https://github.com/huggingface/transformers/blob/v4.34.1/src/transformers/models/mobilebert/modeling_mobilebert.py#L1239)

( config )

Parameters

* **config** ([MobileBertConfig](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.MobileBertConfig)) — Model configuration class with all the parameters of the model. Initializing with a config file does not load the weights associated with the model, only the configuration. Check out the [from\_pretrained()](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/model#transformers.PreTrainedModel.from_pretrained) method to load the model weights.

MobileBert Model transformer with a sequence classification/regression head on top (a linear layer on top of the pooled output) e.g. for GLUE tasks.

This model inherits from [PreTrainedModel](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/model#transformers.PreTrainedModel). Check the superclass documentation for the generic methods the library implements for all its model (such as downloading or saving, resizing the input embeddings, pruning heads etc.)

This model is also a PyTorch [torch.nn.Module](https://pytorch.org/docs/stable/nn.html#torch.nn.Module) subclass. Use it as a regular PyTorch Module and refer to the PyTorch documentation for all matter related to general usage and behavior.

**forward**

[\<source>](https://github.com/huggingface/transformers/blob/v4.34.1/src/transformers/models/mobilebert/modeling_mobilebert.py#L1255)

( input\_ids: typing.Optional\[torch.Tensor] = Noneattention\_mask: typing.Optional\[torch.Tensor] = Nonetoken\_type\_ids: typing.Optional\[torch.Tensor] = Noneposition\_ids: typing.Optional\[torch.Tensor] = Nonehead\_mask: typing.Optional\[torch.Tensor] = Noneinputs\_embeds: typing.Optional\[torch.Tensor] = Nonelabels: typing.Optional\[torch.Tensor] = Noneoutput\_attentions: typing.Optional\[bool] = Noneoutput\_hidden\_states: typing.Optional\[bool] = Nonereturn\_dict: typing.Optional\[bool] = None ) → [transformers.modeling\_outputs.SequenceClassifierOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.modeling_outputs.SequenceClassifierOutput) or `tuple(torch.FloatTensor)`

Parameters

*   **input\_ids** (`torch.LongTensor` of shape `(batch_size, sequence_length)`) — Indices of input sequence tokens in the vocabulary.

    Indices can be obtained using [AutoTokenizer](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/auto#transformers.AutoTokenizer). See [PreTrainedTokenizer.encode()](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/tokenizer#transformers.PreTrainedTokenizerFast.encode) and [PreTrainedTokenizer.**call**()](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/vits#transformers.VitsTokenizer.__call__) for details.

    [What are input IDs?](https://huggingface.co/docs/transformers/glossary#input-ids)
*   **attention\_mask** (`torch.FloatTensor` of shape `(batch_size, sequence_length)`, _optional_) — Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`:

    * 1 for tokens that are **not masked**,
    * 0 for tokens that are **masked**.

    [What are attention masks?](https://huggingface.co/docs/transformers/glossary#attention-mask)
*   **token\_type\_ids** (`torch.LongTensor` of shape `(batch_size, sequence_length)`, _optional_) — Segment token indices to indicate first and second portions of the inputs. Indices are selected in `[0, 1]`:

    * 0 corresponds to a _sentence A_ token,
    * 1 corresponds to a _sentence B_ token.

    [What are token type IDs?](https://huggingface.co/docs/transformers/glossary#token-type-ids)
*   **position\_ids** (`torch.LongTensor` of shape `(batch_size, sequence_length)`, _optional_) — Indices of positions of each input sequence tokens in the position embeddings. Selected in the range `[0, config.max_position_embeddings - 1]`.

    [What are position IDs?](https://huggingface.co/docs/transformers/glossary#position-ids)
* **head\_mask** (`torch.FloatTensor` of shape `(num_heads,)` or `(num_layers, num_heads)`, _optional_) — Mask to nullify selected heads of the self-attention modules. Mask values selected in `[0, 1]`:
  * 1 indicates the head is **not masked**,
  * 0 indicates the head is **masked**.
* **inputs\_embeds** (`torch.FloatTensor` of shape `(batch_size, sequence_length, hidden_size)`, _optional_) — Optionally, instead of passing `input_ids` you can choose to directly pass an embedded representation. This is useful if you want more control over how to convert `input_ids` indices into associated vectors than the model’s internal embedding lookup matrix.
* **output\_attentions** (`bool`, _optional_) — Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned tensors for more detail.
* **output\_hidden\_states** (`bool`, _optional_) — Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for more detail.
* **return\_dict** (`bool`, _optional_) — Whether or not to return a [ModelOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.utils.ModelOutput) instead of a plain tuple.
* **labels** (`torch.LongTensor` of shape `(batch_size,)`, _optional_) — Labels for computing the sequence classification/regression loss. Indices should be in `[0, ..., config.num_labels - 1]`. If `config.num_labels == 1` a regression loss is computed (Mean-Square loss), If `config.num_labels > 1` a classification loss is computed (Cross-Entropy).

Returns

[transformers.modeling\_outputs.SequenceClassifierOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.modeling_outputs.SequenceClassifierOutput) or `tuple(torch.FloatTensor)`

A [transformers.modeling\_outputs.SequenceClassifierOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.modeling_outputs.SequenceClassifierOutput) or a tuple of `torch.FloatTensor` (if `return_dict=False` is passed or when `config.return_dict=False`) comprising various elements depending on the configuration ([MobileBertConfig](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.MobileBertConfig)) and inputs.

* **loss** (`torch.FloatTensor` of shape `(1,)`, _optional_, returned when `labels` is provided) — Classification (or regression if config.num\_labels==1) loss.
* **logits** (`torch.FloatTensor` of shape `(batch_size, config.num_labels)`) — Classification (or regression if config.num\_labels==1) scores (before SoftMax).
*   **hidden\_states** (`tuple(torch.FloatTensor)`, _optional_, returned when `output_hidden_states=True` is passed or when `config.output_hidden_states=True`) — Tuple of `torch.FloatTensor` (one for the output of the embeddings, if the model has an embedding layer, + one for the output of each layer) of shape `(batch_size, sequence_length, hidden_size)`.

    Hidden-states of the model at the output of each layer plus the optional initial embedding outputs.
*   **attentions** (`tuple(torch.FloatTensor)`, _optional_, returned when `output_attentions=True` is passed or when `config.output_attentions=True`) — Tuple of `torch.FloatTensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length, sequence_length)`.

    Attentions weights after the attention softmax, used to compute the weighted average in the self-attention heads.

The [MobileBertForSequenceClassification](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.MobileBertForSequenceClassification) forward method, overrides the `__call__` special method.

Although the recipe for forward pass needs to be defined within this function, one should call the `Module` instance afterwards instead of this since the former takes care of running the pre and post processing steps while the latter silently ignores them.



Example of single-label classification:

Copied

```
>>> import torch
>>> from transformers import AutoTokenizer, MobileBertForSequenceClassification

>>> tokenizer = AutoTokenizer.from_pretrained("lordtt13/emo-mobilebert")
>>> model = MobileBertForSequenceClassification.from_pretrained("lordtt13/emo-mobilebert")

>>> inputs = tokenizer("Hello, my dog is cute", return_tensors="pt")

>>> with torch.no_grad():
...     logits = model(**inputs).logits

>>> predicted_class_id = logits.argmax().item()
>>> model.config.id2label[predicted_class_id]
'others'

>>> # To train a model on `num_labels` classes, you can pass `num_labels=num_labels` to `.from_pretrained(...)`
>>> num_labels = len(model.config.id2label)
>>> model = MobileBertForSequenceClassification.from_pretrained("lordtt13/emo-mobilebert", num_labels=num_labels)

>>> labels = torch.tensor([1])
>>> loss = model(**inputs, labels=labels).loss
>>> round(loss.item(), 2)
4.72
```



Example of multi-label classification:

Copied

```
>>> import torch
>>> from transformers import AutoTokenizer, MobileBertForSequenceClassification

>>> tokenizer = AutoTokenizer.from_pretrained("lordtt13/emo-mobilebert")
>>> model = MobileBertForSequenceClassification.from_pretrained("lordtt13/emo-mobilebert", problem_type="multi_label_classification")

>>> inputs = tokenizer("Hello, my dog is cute", return_tensors="pt")

>>> with torch.no_grad():
...     logits = model(**inputs).logits

>>> predicted_class_ids = torch.arange(0, logits.shape[-1])[torch.sigmoid(logits).squeeze(dim=0) > 0.5]

>>> # To train a model on `num_labels` classes, you can pass `num_labels=num_labels` to `.from_pretrained(...)`
>>> num_labels = len(model.config.id2label)
>>> model = MobileBertForSequenceClassification.from_pretrained(
...     "lordtt13/emo-mobilebert", num_labels=num_labels, problem_type="multi_label_classification"
... )

>>> labels = torch.sum(
...     torch.nn.functional.one_hot(predicted_class_ids[None, :].clone(), num_classes=num_labels), dim=1
... ).to(torch.float)
>>> loss = model(**inputs, labels=labels).loss
```

### MobileBertForMultipleChoice

#### class transformers.MobileBertForMultipleChoice

[\<source>](https://github.com/huggingface/transformers/blob/v4.34.1/src/transformers/models/mobilebert/modeling_mobilebert.py#L1447)

( config )

Parameters

* **config** ([MobileBertConfig](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.MobileBertConfig)) — Model configuration class with all the parameters of the model. Initializing with a config file does not load the weights associated with the model, only the configuration. Check out the [from\_pretrained()](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/model#transformers.PreTrainedModel.from_pretrained) method to load the model weights.

MobileBert Model with a multiple choice classification head on top (a linear layer on top of the pooled output and a softmax) e.g. for RocStories/SWAG tasks.

This model inherits from [PreTrainedModel](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/model#transformers.PreTrainedModel). Check the superclass documentation for the generic methods the library implements for all its model (such as downloading or saving, resizing the input embeddings, pruning heads etc.)

This model is also a PyTorch [torch.nn.Module](https://pytorch.org/docs/stable/nn.html#torch.nn.Module) subclass. Use it as a regular PyTorch Module and refer to the PyTorch documentation for all matter related to general usage and behavior.

**forward**

[\<source>](https://github.com/huggingface/transformers/blob/v4.34.1/src/transformers/models/mobilebert/modeling_mobilebert.py#L1461)

( input\_ids: typing.Optional\[torch.Tensor] = Noneattention\_mask: typing.Optional\[torch.Tensor] = Nonetoken\_type\_ids: typing.Optional\[torch.Tensor] = Noneposition\_ids: typing.Optional\[torch.Tensor] = Nonehead\_mask: typing.Optional\[torch.Tensor] = Noneinputs\_embeds: typing.Optional\[torch.Tensor] = Nonelabels: typing.Optional\[torch.Tensor] = Noneoutput\_attentions: typing.Optional\[bool] = Noneoutput\_hidden\_states: typing.Optional\[bool] = Nonereturn\_dict: typing.Optional\[bool] = None ) → [transformers.modeling\_outputs.MultipleChoiceModelOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.modeling_outputs.MultipleChoiceModelOutput) or `tuple(torch.FloatTensor)`

Parameters

*   **input\_ids** (`torch.LongTensor` of shape `(batch_size, num_choices, sequence_length)`) — Indices of input sequence tokens in the vocabulary.

    Indices can be obtained using [AutoTokenizer](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/auto#transformers.AutoTokenizer). See [PreTrainedTokenizer.encode()](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/tokenizer#transformers.PreTrainedTokenizerFast.encode) and [PreTrainedTokenizer.**call**()](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/vits#transformers.VitsTokenizer.__call__) for details.

    [What are input IDs?](https://huggingface.co/docs/transformers/glossary#input-ids)
*   **attention\_mask** (`torch.FloatTensor` of shape `(batch_size, num_choices, sequence_length)`, _optional_) — Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`:

    * 1 for tokens that are **not masked**,
    * 0 for tokens that are **masked**.

    [What are attention masks?](https://huggingface.co/docs/transformers/glossary#attention-mask)
*   **token\_type\_ids** (`torch.LongTensor` of shape `(batch_size, num_choices, sequence_length)`, _optional_) — Segment token indices to indicate first and second portions of the inputs. Indices are selected in `[0, 1]`:

    * 0 corresponds to a _sentence A_ token,
    * 1 corresponds to a _sentence B_ token.

    [What are token type IDs?](https://huggingface.co/docs/transformers/glossary#token-type-ids)
*   **position\_ids** (`torch.LongTensor` of shape `(batch_size, num_choices, sequence_length)`, _optional_) — Indices of positions of each input sequence tokens in the position embeddings. Selected in the range `[0, config.max_position_embeddings - 1]`.

    [What are position IDs?](https://huggingface.co/docs/transformers/glossary#position-ids)
* **head\_mask** (`torch.FloatTensor` of shape `(num_heads,)` or `(num_layers, num_heads)`, _optional_) — Mask to nullify selected heads of the self-attention modules. Mask values selected in `[0, 1]`:
  * 1 indicates the head is **not masked**,
  * 0 indicates the head is **masked**.
* **inputs\_embeds** (`torch.FloatTensor` of shape `(batch_size, num_choices, sequence_length, hidden_size)`, _optional_) — Optionally, instead of passing `input_ids` you can choose to directly pass an embedded representation. This is useful if you want more control over how to convert `input_ids` indices into associated vectors than the model’s internal embedding lookup matrix.
* **output\_attentions** (`bool`, _optional_) — Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned tensors for more detail.
* **output\_hidden\_states** (`bool`, _optional_) — Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for more detail.
* **return\_dict** (`bool`, _optional_) — Whether or not to return a [ModelOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.utils.ModelOutput) instead of a plain tuple.
* **labels** (`torch.LongTensor` of shape `(batch_size,)`, _optional_) — Labels for computing the multiple choice classification loss. Indices should be in `[0, ..., num_choices-1]` where `num_choices` is the size of the second dimension of the input tensors. (See `input_ids` above)

Returns

[transformers.modeling\_outputs.MultipleChoiceModelOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.modeling_outputs.MultipleChoiceModelOutput) or `tuple(torch.FloatTensor)`

A [transformers.modeling\_outputs.MultipleChoiceModelOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.modeling_outputs.MultipleChoiceModelOutput) or a tuple of `torch.FloatTensor` (if `return_dict=False` is passed or when `config.return_dict=False`) comprising various elements depending on the configuration ([MobileBertConfig](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.MobileBertConfig)) and inputs.

* **loss** (`torch.FloatTensor` of shape _(1,)_, _optional_, returned when `labels` is provided) — Classification loss.
*   **logits** (`torch.FloatTensor` of shape `(batch_size, num_choices)`) — _num\_choices_ is the second dimension of the input tensors. (see _input\_ids_ above).

    Classification scores (before SoftMax).
*   **hidden\_states** (`tuple(torch.FloatTensor)`, _optional_, returned when `output_hidden_states=True` is passed or when `config.output_hidden_states=True`) — Tuple of `torch.FloatTensor` (one for the output of the embeddings, if the model has an embedding layer, + one for the output of each layer) of shape `(batch_size, sequence_length, hidden_size)`.

    Hidden-states of the model at the output of each layer plus the optional initial embedding outputs.
*   **attentions** (`tuple(torch.FloatTensor)`, _optional_, returned when `output_attentions=True` is passed or when `config.output_attentions=True`) — Tuple of `torch.FloatTensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length, sequence_length)`.

    Attentions weights after the attention softmax, used to compute the weighted average in the self-attention heads.

The [MobileBertForMultipleChoice](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.MobileBertForMultipleChoice) forward method, overrides the `__call__` special method.

Although the recipe for forward pass needs to be defined within this function, one should call the `Module` instance afterwards instead of this since the former takes care of running the pre and post processing steps while the latter silently ignores them.



Example:

Copied

```
>>> from transformers import AutoTokenizer, MobileBertForMultipleChoice
>>> import torch

>>> tokenizer = AutoTokenizer.from_pretrained("google/mobilebert-uncased")
>>> model = MobileBertForMultipleChoice.from_pretrained("google/mobilebert-uncased")

>>> prompt = "In Italy, pizza served in formal settings, such as at a restaurant, is presented unsliced."
>>> choice0 = "It is eaten with a fork and a knife."
>>> choice1 = "It is eaten while held in the hand."
>>> labels = torch.tensor(0).unsqueeze(0)  # choice0 is correct (according to Wikipedia ;)), batch size 1

>>> encoding = tokenizer([prompt, prompt], [choice0, choice1], return_tensors="pt", padding=True)
>>> outputs = model(**{k: v.unsqueeze(0) for k, v in encoding.items()}, labels=labels)  # batch size is 1

>>> # the linear classifier still needs to be trained
>>> loss = outputs.loss
>>> logits = outputs.logits
```

### MobileBertForTokenClassification

#### class transformers.MobileBertForTokenClassification

[\<source>](https://github.com/huggingface/transformers/blob/v4.34.1/src/transformers/models/mobilebert/modeling_mobilebert.py#L1544)

( config )

Parameters

* **config** ([MobileBertConfig](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.MobileBertConfig)) — Model configuration class with all the parameters of the model. Initializing with a config file does not load the weights associated with the model, only the configuration. Check out the [from\_pretrained()](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/model#transformers.PreTrainedModel.from_pretrained) method to load the model weights.

MobileBert Model with a token classification head on top (a linear layer on top of the hidden-states output) e.g. for Named-Entity-Recognition (NER) tasks.

This model inherits from [PreTrainedModel](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/model#transformers.PreTrainedModel). Check the superclass documentation for the generic methods the library implements for all its model (such as downloading or saving, resizing the input embeddings, pruning heads etc.)

This model is also a PyTorch [torch.nn.Module](https://pytorch.org/docs/stable/nn.html#torch.nn.Module) subclass. Use it as a regular PyTorch Module and refer to the PyTorch documentation for all matter related to general usage and behavior.

**forward**

[\<source>](https://github.com/huggingface/transformers/blob/v4.34.1/src/transformers/models/mobilebert/modeling_mobilebert.py#L1559)

( input\_ids: typing.Optional\[torch.Tensor] = Noneattention\_mask: typing.Optional\[torch.Tensor] = Nonetoken\_type\_ids: typing.Optional\[torch.Tensor] = Noneposition\_ids: typing.Optional\[torch.Tensor] = Nonehead\_mask: typing.Optional\[torch.Tensor] = Noneinputs\_embeds: typing.Optional\[torch.Tensor] = Nonelabels: typing.Optional\[torch.Tensor] = Noneoutput\_attentions: typing.Optional\[bool] = Noneoutput\_hidden\_states: typing.Optional\[bool] = Nonereturn\_dict: typing.Optional\[bool] = None ) → [transformers.modeling\_outputs.TokenClassifierOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.modeling_outputs.TokenClassifierOutput) or `tuple(torch.FloatTensor)`

Parameters

*   **input\_ids** (`torch.LongTensor` of shape `(batch_size, sequence_length)`) — Indices of input sequence tokens in the vocabulary.

    Indices can be obtained using [AutoTokenizer](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/auto#transformers.AutoTokenizer). See [PreTrainedTokenizer.encode()](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/tokenizer#transformers.PreTrainedTokenizerFast.encode) and [PreTrainedTokenizer.**call**()](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/vits#transformers.VitsTokenizer.__call__) for details.

    [What are input IDs?](https://huggingface.co/docs/transformers/glossary#input-ids)
*   **attention\_mask** (`torch.FloatTensor` of shape `(batch_size, sequence_length)`, _optional_) — Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`:

    * 1 for tokens that are **not masked**,
    * 0 for tokens that are **masked**.

    [What are attention masks?](https://huggingface.co/docs/transformers/glossary#attention-mask)
*   **token\_type\_ids** (`torch.LongTensor` of shape `(batch_size, sequence_length)`, _optional_) — Segment token indices to indicate first and second portions of the inputs. Indices are selected in `[0, 1]`:

    * 0 corresponds to a _sentence A_ token,
    * 1 corresponds to a _sentence B_ token.

    [What are token type IDs?](https://huggingface.co/docs/transformers/glossary#token-type-ids)
*   **position\_ids** (`torch.LongTensor` of shape `(batch_size, sequence_length)`, _optional_) — Indices of positions of each input sequence tokens in the position embeddings. Selected in the range `[0, config.max_position_embeddings - 1]`.

    [What are position IDs?](https://huggingface.co/docs/transformers/glossary#position-ids)
* **head\_mask** (`torch.FloatTensor` of shape `(num_heads,)` or `(num_layers, num_heads)`, _optional_) — Mask to nullify selected heads of the self-attention modules. Mask values selected in `[0, 1]`:
  * 1 indicates the head is **not masked**,
  * 0 indicates the head is **masked**.
* **inputs\_embeds** (`torch.FloatTensor` of shape `(batch_size, sequence_length, hidden_size)`, _optional_) — Optionally, instead of passing `input_ids` you can choose to directly pass an embedded representation. This is useful if you want more control over how to convert `input_ids` indices into associated vectors than the model’s internal embedding lookup matrix.
* **output\_attentions** (`bool`, _optional_) — Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned tensors for more detail.
* **output\_hidden\_states** (`bool`, _optional_) — Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for more detail.
* **return\_dict** (`bool`, _optional_) — Whether or not to return a [ModelOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.utils.ModelOutput) instead of a plain tuple.
* **labels** (`torch.LongTensor` of shape `(batch_size, sequence_length)`, _optional_) — Labels for computing the token classification loss. Indices should be in `[0, ..., config.num_labels - 1]`.

Returns

[transformers.modeling\_outputs.TokenClassifierOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.modeling_outputs.TokenClassifierOutput) or `tuple(torch.FloatTensor)`

A [transformers.modeling\_outputs.TokenClassifierOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.modeling_outputs.TokenClassifierOutput) or a tuple of `torch.FloatTensor` (if `return_dict=False` is passed or when `config.return_dict=False`) comprising various elements depending on the configuration ([MobileBertConfig](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.MobileBertConfig)) and inputs.

* **loss** (`torch.FloatTensor` of shape `(1,)`, _optional_, returned when `labels` is provided) — Classification loss.
* **logits** (`torch.FloatTensor` of shape `(batch_size, sequence_length, config.num_labels)`) — Classification scores (before SoftMax).
*   **hidden\_states** (`tuple(torch.FloatTensor)`, _optional_, returned when `output_hidden_states=True` is passed or when `config.output_hidden_states=True`) — Tuple of `torch.FloatTensor` (one for the output of the embeddings, if the model has an embedding layer, + one for the output of each layer) of shape `(batch_size, sequence_length, hidden_size)`.

    Hidden-states of the model at the output of each layer plus the optional initial embedding outputs.
*   **attentions** (`tuple(torch.FloatTensor)`, _optional_, returned when `output_attentions=True` is passed or when `config.output_attentions=True`) — Tuple of `torch.FloatTensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length, sequence_length)`.

    Attentions weights after the attention softmax, used to compute the weighted average in the self-attention heads.

The [MobileBertForTokenClassification](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.MobileBertForTokenClassification) forward method, overrides the `__call__` special method.

Although the recipe for forward pass needs to be defined within this function, one should call the `Module` instance afterwards instead of this since the former takes care of running the pre and post processing steps while the latter silently ignores them.



Example:

Copied

```
>>> from transformers import AutoTokenizer, MobileBertForTokenClassification
>>> import torch

>>> tokenizer = AutoTokenizer.from_pretrained("mrm8488/mobilebert-finetuned-ner")
>>> model = MobileBertForTokenClassification.from_pretrained("mrm8488/mobilebert-finetuned-ner")

>>> inputs = tokenizer(
...     "BOINCAI is a company based in Paris and New York", add_special_tokens=False, return_tensors="pt"
... )

>>> with torch.no_grad():
...     logits = model(**inputs).logits

>>> predicted_token_class_ids = logits.argmax(-1)

>>> # Note that tokens are classified rather then input words which means that
>>> # there might be more predicted token classes than words.
>>> # Multiple token classes might account for the same word
>>> predicted_tokens_classes = [model.config.id2label[t.item()] for t in predicted_token_class_ids[0]]
>>> predicted_tokens_classes
['I-ORG', 'I-ORG', 'O', 'O', 'O', 'O', 'O', 'I-LOC', 'O', 'I-LOC', 'I-LOC']

>>> labels = predicted_token_class_ids
>>> loss = model(**inputs, labels=labels).loss
>>> round(loss.item(), 2)
0.03
```

### MobileBertForQuestionAnswering

#### class transformers.MobileBertForQuestionAnswering

[\<source>](https://github.com/huggingface/transformers/blob/v4.34.1/src/transformers/models/mobilebert/modeling_mobilebert.py#L1343)

( config )

Parameters

* **config** ([MobileBertConfig](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.MobileBertConfig)) — Model configuration class with all the parameters of the model. Initializing with a config file does not load the weights associated with the model, only the configuration. Check out the [from\_pretrained()](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/model#transformers.PreTrainedModel.from_pretrained) method to load the model weights.

MobileBert Model with a span classification head on top for extractive question-answering tasks like SQuAD (a linear layers on top of the hidden-states output to compute `span start logits` and `span end logits`).

This model inherits from [PreTrainedModel](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/model#transformers.PreTrainedModel). Check the superclass documentation for the generic methods the library implements for all its model (such as downloading or saving, resizing the input embeddings, pruning heads etc.)

This model is also a PyTorch [torch.nn.Module](https://pytorch.org/docs/stable/nn.html#torch.nn.Module) subclass. Use it as a regular PyTorch Module and refer to the PyTorch documentation for all matter related to general usage and behavior.

**forward**

[\<source>](https://github.com/huggingface/transformers/blob/v4.34.1/src/transformers/models/mobilebert/modeling_mobilebert.py#L1354)

( input\_ids: typing.Optional\[torch.Tensor] = Noneattention\_mask: typing.Optional\[torch.Tensor] = Nonetoken\_type\_ids: typing.Optional\[torch.Tensor] = Noneposition\_ids: typing.Optional\[torch.Tensor] = Nonehead\_mask: typing.Optional\[torch.Tensor] = Noneinputs\_embeds: typing.Optional\[torch.Tensor] = Nonestart\_positions: typing.Optional\[torch.Tensor] = Noneend\_positions: typing.Optional\[torch.Tensor] = Noneoutput\_attentions: typing.Optional\[bool] = Noneoutput\_hidden\_states: typing.Optional\[bool] = Nonereturn\_dict: typing.Optional\[bool] = None ) → [transformers.modeling\_outputs.QuestionAnsweringModelOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.modeling_outputs.QuestionAnsweringModelOutput) or `tuple(torch.FloatTensor)`

Parameters

*   **input\_ids** (`torch.LongTensor` of shape `(batch_size, sequence_length)`) — Indices of input sequence tokens in the vocabulary.

    Indices can be obtained using [AutoTokenizer](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/auto#transformers.AutoTokenizer). See [PreTrainedTokenizer.encode()](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/tokenizer#transformers.PreTrainedTokenizerFast.encode) and [PreTrainedTokenizer.**call**()](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/vits#transformers.VitsTokenizer.__call__) for details.

    [What are input IDs?](https://huggingface.co/docs/transformers/glossary#input-ids)
*   **attention\_mask** (`torch.FloatTensor` of shape `(batch_size, sequence_length)`, _optional_) — Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`:

    * 1 for tokens that are **not masked**,
    * 0 for tokens that are **masked**.

    [What are attention masks?](https://huggingface.co/docs/transformers/glossary#attention-mask)
*   **token\_type\_ids** (`torch.LongTensor` of shape `(batch_size, sequence_length)`, _optional_) — Segment token indices to indicate first and second portions of the inputs. Indices are selected in `[0, 1]`:

    * 0 corresponds to a _sentence A_ token,
    * 1 corresponds to a _sentence B_ token.

    [What are token type IDs?](https://huggingface.co/docs/transformers/glossary#token-type-ids)
*   **position\_ids** (`torch.LongTensor` of shape `(batch_size, sequence_length)`, _optional_) — Indices of positions of each input sequence tokens in the position embeddings. Selected in the range `[0, config.max_position_embeddings - 1]`.

    [What are position IDs?](https://huggingface.co/docs/transformers/glossary#position-ids)
* **head\_mask** (`torch.FloatTensor` of shape `(num_heads,)` or `(num_layers, num_heads)`, _optional_) — Mask to nullify selected heads of the self-attention modules. Mask values selected in `[0, 1]`:
  * 1 indicates the head is **not masked**,
  * 0 indicates the head is **masked**.
* **inputs\_embeds** (`torch.FloatTensor` of shape `(batch_size, sequence_length, hidden_size)`, _optional_) — Optionally, instead of passing `input_ids` you can choose to directly pass an embedded representation. This is useful if you want more control over how to convert `input_ids` indices into associated vectors than the model’s internal embedding lookup matrix.
* **output\_attentions** (`bool`, _optional_) — Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned tensors for more detail.
* **output\_hidden\_states** (`bool`, _optional_) — Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for more detail.
* **return\_dict** (`bool`, _optional_) — Whether or not to return a [ModelOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.utils.ModelOutput) instead of a plain tuple.
* **start\_positions** (`torch.LongTensor` of shape `(batch_size,)`, _optional_) — Labels for position (index) of the start of the labelled span for computing the token classification loss. Positions are clamped to the length of the sequence (`sequence_length`). Position outside of the sequence are not taken into account for computing the loss.
* **end\_positions** (`torch.LongTensor` of shape `(batch_size,)`, _optional_) — Labels for position (index) of the end of the labelled span for computing the token classification loss. Positions are clamped to the length of the sequence (`sequence_length`). Position outside of the sequence are not taken into account for computing the loss.

Returns

[transformers.modeling\_outputs.QuestionAnsweringModelOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.modeling_outputs.QuestionAnsweringModelOutput) or `tuple(torch.FloatTensor)`

A [transformers.modeling\_outputs.QuestionAnsweringModelOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.modeling_outputs.QuestionAnsweringModelOutput) or a tuple of `torch.FloatTensor` (if `return_dict=False` is passed or when `config.return_dict=False`) comprising various elements depending on the configuration ([MobileBertConfig](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.MobileBertConfig)) and inputs.

* **loss** (`torch.FloatTensor` of shape `(1,)`, _optional_, returned when `labels` is provided) — Total span extraction loss is the sum of a Cross-Entropy for the start and end positions.
* **start\_logits** (`torch.FloatTensor` of shape `(batch_size, sequence_length)`) — Span-start scores (before SoftMax).
* **end\_logits** (`torch.FloatTensor` of shape `(batch_size, sequence_length)`) — Span-end scores (before SoftMax).
*   **hidden\_states** (`tuple(torch.FloatTensor)`, _optional_, returned when `output_hidden_states=True` is passed or when `config.output_hidden_states=True`) — Tuple of `torch.FloatTensor` (one for the output of the embeddings, if the model has an embedding layer, + one for the output of each layer) of shape `(batch_size, sequence_length, hidden_size)`.

    Hidden-states of the model at the output of each layer plus the optional initial embedding outputs.
*   **attentions** (`tuple(torch.FloatTensor)`, _optional_, returned when `output_attentions=True` is passed or when `config.output_attentions=True`) — Tuple of `torch.FloatTensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length, sequence_length)`.

    Attentions weights after the attention softmax, used to compute the weighted average in the self-attention heads.

The [MobileBertForQuestionAnswering](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.MobileBertForQuestionAnswering) forward method, overrides the `__call__` special method.

Although the recipe for forward pass needs to be defined within this function, one should call the `Module` instance afterwards instead of this since the former takes care of running the pre and post processing steps while the latter silently ignores them.



Example:

Copied

```
>>> from transformers import AutoTokenizer, MobileBertForQuestionAnswering
>>> import torch

>>> tokenizer = AutoTokenizer.from_pretrained("csarron/mobilebert-uncased-squad-v2")
>>> model = MobileBertForQuestionAnswering.from_pretrained("csarron/mobilebert-uncased-squad-v2")

>>> question, text = "Who was Jim Henson?", "Jim Henson was a nice puppet"

>>> inputs = tokenizer(question, text, return_tensors="pt")
>>> with torch.no_grad():
...     outputs = model(**inputs)

>>> answer_start_index = outputs.start_logits.argmax()
>>> answer_end_index = outputs.end_logits.argmax()

>>> predict_answer_tokens = inputs.input_ids[0, answer_start_index : answer_end_index + 1]
>>> tokenizer.decode(predict_answer_tokens, skip_special_tokens=True)
'a nice puppet'

>>> # target is "nice puppet"
>>> target_start_index = torch.tensor([12])
>>> target_end_index = torch.tensor([13])

>>> outputs = model(**inputs, start_positions=target_start_index, end_positions=target_end_index)
>>> loss = outputs.loss
>>> round(loss.item(), 2)
3.98
```

### TFMobileBertModel

#### class transformers.TFMobileBertModel

[\<source>](https://github.com/huggingface/transformers/blob/v4.34.1/src/transformers/models/mobilebert/modeling_tf_mobilebert.py#L961)

( \*args\*\*kwargs )

Parameters

* **config** ([MobileBertConfig](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.MobileBertConfig)) — Model configuration class with all the parameters of the model. Initializing with a config file does not load the weights associated with the model, only the configuration. Check out the [from\_pretrained()](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/model#transformers.PreTrainedModel.from_pretrained) method to load the model weights.

The bare MobileBert Model transformer outputting raw hidden-states without any specific head on top.

This model inherits from [TFPreTrainedModel](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/model#transformers.TFPreTrainedModel). Check the superclass documentation for the generic methods the library implements for all its model (such as downloading or saving, resizing the input embeddings, pruning heads etc.)

This model is also a [tf.keras.Model](https://www.tensorflow.org/api_docs/python/tf/keras/Model) subclass. Use it as a regular TF 2.0 Keras Model and refer to the TF 2.0 documentation for all matter related to general usage and behavior.

TensorFlow models and layers in `transformers` accept two formats as input:

* having all inputs as keyword arguments (like PyTorch models), or
* having all inputs as a list, tuple or dict in the first positional argument.

The reason the second format is supported is that Keras methods prefer this format when passing inputs to models and layers. Because of this support, when using methods like `model.fit()` things should “just work” for you - just pass your inputs and labels in any format that `model.fit()` supports! If, however, you want to use the second format outside of Keras methods like `fit()` and `predict()`, such as when creating your own layers or models with the Keras `Functional` API, there are three possibilities you can use to gather all the input Tensors in the first positional argument:

* a single Tensor with `input_ids` only and nothing else: `model(input_ids)`
* a list of varying length with one or several input Tensors IN THE ORDER given in the docstring: `model([input_ids, attention_mask])` or `model([input_ids, attention_mask, token_type_ids])`
* a dictionary with one or several input Tensors associated to the input names given in the docstring: `model({"input_ids": input_ids, "token_type_ids": token_type_ids})`

Note that when creating models and layers with [subclassing](https://keras.io/guides/making_new_layers_and_models_via_subclassing/) then you don’t need to worry about any of this, as you can just pass inputs like you would to any other Python function!

**call**

[\<source>](https://github.com/huggingface/transformers/blob/v4.34.1/src/transformers/models/mobilebert/modeling_tf_mobilebert.py#L966)

( input\_ids: TFModelInputType | None = Noneattention\_mask: np.ndarray | tf.Tensor | None = Nonetoken\_type\_ids: np.ndarray | tf.Tensor | None = Noneposition\_ids: np.ndarray | tf.Tensor | None = Nonehead\_mask: np.ndarray | tf.Tensor | None = Noneinputs\_embeds: np.ndarray | tf.Tensor | None = Noneoutput\_attentions: Optional\[bool] = Noneoutput\_hidden\_states: Optional\[bool] = Nonereturn\_dict: Optional\[bool] = Nonetraining: Optional\[bool] = False ) → [transformers.modeling\_tf\_outputs.TFBaseModelOutputWithPooling](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.modeling_tf_outputs.TFBaseModelOutputWithPooling) or `tuple(tf.Tensor)`

Parameters

*   **input\_ids** (`Numpy array` or `tf.Tensor` of shape `(batch_size, sequence_length)`) — Indices of input sequence tokens in the vocabulary.

    Indices can be obtained using [AutoTokenizer](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/auto#transformers.AutoTokenizer). See [PreTrainedTokenizer.**call**()](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/vits#transformers.VitsTokenizer.__call__) and [PreTrainedTokenizer.encode()](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/tokenizer#transformers.PreTrainedTokenizerFast.encode) for details.

    [What are input IDs?](https://huggingface.co/docs/transformers/glossary#input-ids)
*   **attention\_mask** (`Numpy array` or `tf.Tensor` of shape `(batch_size, sequence_length)`, _optional_) — Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`:

    * 1 for tokens that are **not masked**,
    * 0 for tokens that are **masked**.

    [What are attention masks?](https://huggingface.co/docs/transformers/glossary#attention-mask)
*   **token\_type\_ids** (`Numpy array` or `tf.Tensor` of shape `(batch_size, sequence_length)`, _optional_) — Segment token indices to indicate first and second portions of the inputs. Indices are selected in `[0, 1]`:

    * 0 corresponds to a _sentence A_ token,
    * 1 corresponds to a _sentence B_ token.

    [What are token type IDs?](https://huggingface.co/docs/transformers/glossary#token-type-ids)
*   **position\_ids** (`Numpy array` or `tf.Tensor` of shape `(batch_size, sequence_length)`, _optional_) — Indices of positions of each input sequence tokens in the position embeddings. Selected in the range `[0, config.max_position_embeddings - 1]`.

    [What are position IDs?](https://huggingface.co/docs/transformers/glossary#position-ids)
* **head\_mask** (`Numpy array` or `tf.Tensor` of shape `(num_heads,)` or `(num_layers, num_heads)`, _optional_) — Mask to nullify selected heads of the self-attention modules. Mask values selected in `[0, 1]`:
  * 1 indicates the head is **not masked**,
  * 0 indicates the head is **masked**.
* **inputs\_embeds** (`tf.Tensor` of shape `(batch_size, sequence_length, hidden_size)`, _optional_) — Optionally, instead of passing `input_ids` you can choose to directly pass an embedded representation. This is useful if you want more control over how to convert `input_ids` indices into associated vectors than the model’s internal embedding lookup matrix.
* **output\_attentions** (`bool`, _optional_) — Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned tensors for more detail. This argument can be used only in eager mode, in graph mode the value in the config will be used instead.
* **output\_hidden\_states** (`bool`, _optional_) — Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for more detail. This argument can be used only in eager mode, in graph mode the value in the config will be used instead.
* **return\_dict** (`bool`, _optional_) — Whether or not to return a [ModelOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.utils.ModelOutput) instead of a plain tuple. This argument can be used in eager mode, in graph mode the value will always be set to True.
* **training** (`bool`, _optional_, defaults to `False`) — Whether or not to use the model in training mode (some modules like dropout modules have different behaviors between training and evaluation).

Returns

[transformers.modeling\_tf\_outputs.TFBaseModelOutputWithPooling](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.modeling_tf_outputs.TFBaseModelOutputWithPooling) or `tuple(tf.Tensor)`

A [transformers.modeling\_tf\_outputs.TFBaseModelOutputWithPooling](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.modeling_tf_outputs.TFBaseModelOutputWithPooling) or a tuple of `tf.Tensor` (if `return_dict=False` is passed or when `config.return_dict=False`) comprising various elements depending on the configuration ([MobileBertConfig](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.MobileBertConfig)) and inputs.

* **last\_hidden\_state** (`tf.Tensor` of shape `(batch_size, sequence_length, hidden_size)`) — Sequence of hidden-states at the output of the last layer of the model.
*   **pooler\_output** (`tf.Tensor` of shape `(batch_size, hidden_size)`) — Last layer hidden-state of the first token of the sequence (classification token) further processed by a Linear layer and a Tanh activation function. The Linear layer weights are trained from the next sentence prediction (classification) objective during pretraining.

    This output is usually _not_ a good summary of the semantic content of the input, you’re often better with averaging or pooling the sequence of hidden-states for the whole input sequence.
*   **hidden\_states** (`tuple(tf.Tensor)`, _optional_, returned when `output_hidden_states=True` is passed or when `config.output_hidden_states=True`) — Tuple of `tf.Tensor` (one for the output of the embeddings + one for the output of each layer) of shape `(batch_size, sequence_length, hidden_size)`.

    Hidden-states of the model at the output of each layer plus the initial embedding outputs.
*   **attentions** (`tuple(tf.Tensor)`, _optional_, returned when `output_attentions=True` is passed or when `config.output_attentions=True`) — Tuple of `tf.Tensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length, sequence_length)`.

    Attentions weights after the attention softmax, used to compute the weighted average in the self-attention heads.

The [TFMobileBertModel](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.TFMobileBertModel) forward method, overrides the `__call__` special method.

Although the recipe for forward pass needs to be defined within this function, one should call the `Module` instance afterwards instead of this since the former takes care of running the pre and post processing steps while the latter silently ignores them.



Example:

Copied

```
>>> from transformers import AutoTokenizer, TFMobileBertModel
>>> import tensorflow as tf

>>> tokenizer = AutoTokenizer.from_pretrained("google/mobilebert-uncased")
>>> model = TFMobileBertModel.from_pretrained("google/mobilebert-uncased")

>>> inputs = tokenizer("Hello, my dog is cute", return_tensors="tf")
>>> outputs = model(inputs)

>>> last_hidden_states = outputs.last_hidden_state
```

### TFMobileBertForPreTraining

#### class transformers.TFMobileBertForPreTraining

[\<source>](https://github.com/huggingface/transformers/blob/v4.34.1/src/transformers/models/mobilebert/modeling_tf_mobilebert.py#L1009)

( \*args\*\*kwargs )

Parameters

* **config** ([MobileBertConfig](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.MobileBertConfig)) — Model configuration class with all the parameters of the model. Initializing with a config file does not load the weights associated with the model, only the configuration. Check out the [from\_pretrained()](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/model#transformers.PreTrainedModel.from_pretrained) method to load the model weights.

MobileBert Model with two heads on top as done during the pretraining: a `masked language modeling` head and a `next sentence prediction (classification)` head.

This model inherits from [TFPreTrainedModel](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/model#transformers.TFPreTrainedModel). Check the superclass documentation for the generic methods the library implements for all its model (such as downloading or saving, resizing the input embeddings, pruning heads etc.)

This model is also a [tf.keras.Model](https://www.tensorflow.org/api_docs/python/tf/keras/Model) subclass. Use it as a regular TF 2.0 Keras Model and refer to the TF 2.0 documentation for all matter related to general usage and behavior.

TensorFlow models and layers in `transformers` accept two formats as input:

* having all inputs as keyword arguments (like PyTorch models), or
* having all inputs as a list, tuple or dict in the first positional argument.

The reason the second format is supported is that Keras methods prefer this format when passing inputs to models and layers. Because of this support, when using methods like `model.fit()` things should “just work” for you - just pass your inputs and labels in any format that `model.fit()` supports! If, however, you want to use the second format outside of Keras methods like `fit()` and `predict()`, such as when creating your own layers or models with the Keras `Functional` API, there are three possibilities you can use to gather all the input Tensors in the first positional argument:

* a single Tensor with `input_ids` only and nothing else: `model(input_ids)`
* a list of varying length with one or several input Tensors IN THE ORDER given in the docstring: `model([input_ids, attention_mask])` or `model([input_ids, attention_mask, token_type_ids])`
* a dictionary with one or several input Tensors associated to the input names given in the docstring: `model({"input_ids": input_ids, "token_type_ids": token_type_ids})`

Note that when creating models and layers with [subclassing](https://keras.io/guides/making_new_layers_and_models_via_subclassing/) then you don’t need to worry about any of this, as you can just pass inputs like you would to any other Python function!

**call**

[\<source>](https://github.com/huggingface/transformers/blob/v4.34.1/src/transformers/models/mobilebert/modeling_tf_mobilebert.py#L1023)

( input\_ids: TFModelInputType | None = Noneattention\_mask: np.ndarray | tf.Tensor | None = Nonetoken\_type\_ids: np.ndarray | tf.Tensor | None = Noneposition\_ids: np.ndarray | tf.Tensor | None = Nonehead\_mask: np.ndarray | tf.Tensor | None = Noneinputs\_embeds: np.ndarray | tf.Tensor | None = Noneoutput\_attentions: Optional\[bool] = Noneoutput\_hidden\_states: Optional\[bool] = Nonereturn\_dict: Optional\[bool] = Nonelabels: np.ndarray | tf.Tensor | None = Nonenext\_sentence\_label: np.ndarray | tf.Tensor | None = Nonetraining: Optional\[bool] = False ) → [transformers.models.mobilebert.modeling\_tf\_mobilebert.TFMobileBertForPreTrainingOutput](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.models.mobilebert.modeling_tf_mobilebert.TFMobileBertForPreTrainingOutput) or `tuple(tf.Tensor)`

Parameters

*   **input\_ids** (`Numpy array` or `tf.Tensor` of shape `(batch_size, sequence_length)`) — Indices of input sequence tokens in the vocabulary.

    Indices can be obtained using [AutoTokenizer](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/auto#transformers.AutoTokenizer). See [PreTrainedTokenizer.**call**()](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/vits#transformers.VitsTokenizer.__call__) and [PreTrainedTokenizer.encode()](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/tokenizer#transformers.PreTrainedTokenizerFast.encode) for details.

    [What are input IDs?](https://huggingface.co/docs/transformers/glossary#input-ids)
*   **attention\_mask** (`Numpy array` or `tf.Tensor` of shape `(batch_size, sequence_length)`, _optional_) — Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`:

    * 1 for tokens that are **not masked**,
    * 0 for tokens that are **masked**.

    [What are attention masks?](https://huggingface.co/docs/transformers/glossary#attention-mask)
*   **token\_type\_ids** (`Numpy array` or `tf.Tensor` of shape `(batch_size, sequence_length)`, _optional_) — Segment token indices to indicate first and second portions of the inputs. Indices are selected in `[0, 1]`:

    * 0 corresponds to a _sentence A_ token,
    * 1 corresponds to a _sentence B_ token.

    [What are token type IDs?](https://huggingface.co/docs/transformers/glossary#token-type-ids)
*   **position\_ids** (`Numpy array` or `tf.Tensor` of shape `(batch_size, sequence_length)`, _optional_) — Indices of positions of each input sequence tokens in the position embeddings. Selected in the range `[0, config.max_position_embeddings - 1]`.

    [What are position IDs?](https://huggingface.co/docs/transformers/glossary#position-ids)
* **head\_mask** (`Numpy array` or `tf.Tensor` of shape `(num_heads,)` or `(num_layers, num_heads)`, _optional_) — Mask to nullify selected heads of the self-attention modules. Mask values selected in `[0, 1]`:
  * 1 indicates the head is **not masked**,
  * 0 indicates the head is **masked**.
* **inputs\_embeds** (`tf.Tensor` of shape `(batch_size, sequence_length, hidden_size)`, _optional_) — Optionally, instead of passing `input_ids` you can choose to directly pass an embedded representation. This is useful if you want more control over how to convert `input_ids` indices into associated vectors than the model’s internal embedding lookup matrix.
* **output\_attentions** (`bool`, _optional_) — Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned tensors for more detail. This argument can be used only in eager mode, in graph mode the value in the config will be used instead.
* **output\_hidden\_states** (`bool`, _optional_) — Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for more detail. This argument can be used only in eager mode, in graph mode the value in the config will be used instead.
* **return\_dict** (`bool`, _optional_) — Whether or not to return a [ModelOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.utils.ModelOutput) instead of a plain tuple. This argument can be used in eager mode, in graph mode the value will always be set to True.
* **training** (`bool`, _optional_, defaults to `False`) — Whether or not to use the model in training mode (some modules like dropout modules have different behaviors between training and evaluation).

Returns

[transformers.models.mobilebert.modeling\_tf\_mobilebert.TFMobileBertForPreTrainingOutput](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.models.mobilebert.modeling_tf_mobilebert.TFMobileBertForPreTrainingOutput) or `tuple(tf.Tensor)`

A [transformers.models.mobilebert.modeling\_tf\_mobilebert.TFMobileBertForPreTrainingOutput](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.models.mobilebert.modeling_tf_mobilebert.TFMobileBertForPreTrainingOutput) or a tuple of `tf.Tensor` (if `return_dict=False` is passed or when `config.return_dict=False`) comprising various elements depending on the configuration ([MobileBertConfig](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.MobileBertConfig)) and inputs.

* **prediction\_logits** (`tf.Tensor` of shape `(batch_size, sequence_length, config.vocab_size)`) — Prediction scores of the language modeling head (scores for each vocabulary token before SoftMax).
* **seq\_relationship\_logits** (`tf.Tensor` of shape `(batch_size, 2)`) — Prediction scores of the next sequence prediction (classification) head (scores of True/False continuation before SoftMax).
*   **hidden\_states** (`tuple(tf.Tensor)`, _optional_, returned when `output_hidden_states=True` is passed or when `config.output_hidden_states=True`) — Tuple of `tf.Tensor` (one for the output of the embeddings + one for the output of each layer) of shape `(batch_size, sequence_length, hidden_size)`.

    Hidden-states of the model at the output of each layer plus the initial embedding outputs.
*   **attentions** (`tuple(tf.Tensor)`, _optional_, returned when `output_attentions=True` is passed or when `config.output_attentions=True`) — Tuple of `tf.Tensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length, sequence_length)`.

    Attentions weights after the attention softmax, used to compute the weighted average in the self-attention heads.

The [TFMobileBertForPreTraining](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.TFMobileBertForPreTraining) forward method, overrides the `__call__` special method.

Although the recipe for forward pass needs to be defined within this function, one should call the `Module` instance afterwards instead of this since the former takes care of running the pre and post processing steps while the latter silently ignores them.



Examples:

Copied

```
>>> import tensorflow as tf
>>> from transformers import AutoTokenizer, TFMobileBertForPreTraining

>>> tokenizer = AutoTokenizer.from_pretrained("google/mobilebert-uncased")
>>> model = TFMobileBertForPreTraining.from_pretrained("google/mobilebert-uncased")
>>> input_ids = tf.constant(tokenizer.encode("Hello, my dog is cute"))[None, :]  # Batch size 1
>>> outputs = model(input_ids)
>>> prediction_scores, seq_relationship_scores = outputs[:2]
```

### TFMobileBertForMaskedLM

#### class transformers.TFMobileBertForMaskedLM

[\<source>](https://github.com/huggingface/transformers/blob/v4.34.1/src/transformers/models/mobilebert/modeling_tf_mobilebert.py#L1093)

( \*args\*\*kwargs )

Parameters

* **config** ([MobileBertConfig](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.MobileBertConfig)) — Model configuration class with all the parameters of the model. Initializing with a config file does not load the weights associated with the model, only the configuration. Check out the [from\_pretrained()](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/model#transformers.PreTrainedModel.from_pretrained) method to load the model weights.

MobileBert Model with a `language modeling` head on top.

This model inherits from [TFPreTrainedModel](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/model#transformers.TFPreTrainedModel). Check the superclass documentation for the generic methods the library implements for all its model (such as downloading or saving, resizing the input embeddings, pruning heads etc.)

This model is also a [tf.keras.Model](https://www.tensorflow.org/api_docs/python/tf/keras/Model) subclass. Use it as a regular TF 2.0 Keras Model and refer to the TF 2.0 documentation for all matter related to general usage and behavior.

TensorFlow models and layers in `transformers` accept two formats as input:

* having all inputs as keyword arguments (like PyTorch models), or
* having all inputs as a list, tuple or dict in the first positional argument.

The reason the second format is supported is that Keras methods prefer this format when passing inputs to models and layers. Because of this support, when using methods like `model.fit()` things should “just work” for you - just pass your inputs and labels in any format that `model.fit()` supports! If, however, you want to use the second format outside of Keras methods like `fit()` and `predict()`, such as when creating your own layers or models with the Keras `Functional` API, there are three possibilities you can use to gather all the input Tensors in the first positional argument:

* a single Tensor with `input_ids` only and nothing else: `model(input_ids)`
* a list of varying length with one or several input Tensors IN THE ORDER given in the docstring: `model([input_ids, attention_mask])` or `model([input_ids, attention_mask, token_type_ids])`
* a dictionary with one or several input Tensors associated to the input names given in the docstring: `model({"input_ids": input_ids, "token_type_ids": token_type_ids})`

Note that when creating models and layers with [subclassing](https://keras.io/guides/making_new_layers_and_models_via_subclassing/) then you don’t need to worry about any of this, as you can just pass inputs like you would to any other Python function!

**call**

[\<source>](https://github.com/huggingface/transformers/blob/v4.34.1/src/transformers/models/mobilebert/modeling_tf_mobilebert.py#L1114)

( input\_ids: TFModelInputType | None = Noneattention\_mask: np.ndarray | tf.Tensor | None = Nonetoken\_type\_ids: np.ndarray | tf.Tensor | None = Noneposition\_ids: np.ndarray | tf.Tensor | None = Nonehead\_mask: np.ndarray | tf.Tensor | None = Noneinputs\_embeds: np.ndarray | tf.Tensor | None = Noneoutput\_attentions: Optional\[bool] = Noneoutput\_hidden\_states: Optional\[bool] = Nonereturn\_dict: Optional\[bool] = Nonelabels: np.ndarray | tf.Tensor | None = Nonetraining: Optional\[bool] = False ) → [transformers.modeling\_tf\_outputs.TFMaskedLMOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.modeling_tf_outputs.TFMaskedLMOutput) or `tuple(tf.Tensor)`

Parameters

*   **input\_ids** (`Numpy array` or `tf.Tensor` of shape `(batch_size, sequence_length)`) — Indices of input sequence tokens in the vocabulary.

    Indices can be obtained using [AutoTokenizer](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/auto#transformers.AutoTokenizer). See [PreTrainedTokenizer.**call**()](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/vits#transformers.VitsTokenizer.__call__) and [PreTrainedTokenizer.encode()](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/tokenizer#transformers.PreTrainedTokenizerFast.encode) for details.

    [What are input IDs?](https://huggingface.co/docs/transformers/glossary#input-ids)
*   **attention\_mask** (`Numpy array` or `tf.Tensor` of shape `(batch_size, sequence_length)`, _optional_) — Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`:

    * 1 for tokens that are **not masked**,
    * 0 for tokens that are **masked**.

    [What are attention masks?](https://huggingface.co/docs/transformers/glossary#attention-mask)
*   **token\_type\_ids** (`Numpy array` or `tf.Tensor` of shape `(batch_size, sequence_length)`, _optional_) — Segment token indices to indicate first and second portions of the inputs. Indices are selected in `[0, 1]`:

    * 0 corresponds to a _sentence A_ token,
    * 1 corresponds to a _sentence B_ token.

    [What are token type IDs?](https://huggingface.co/docs/transformers/glossary#token-type-ids)
*   **position\_ids** (`Numpy array` or `tf.Tensor` of shape `(batch_size, sequence_length)`, _optional_) — Indices of positions of each input sequence tokens in the position embeddings. Selected in the range `[0, config.max_position_embeddings - 1]`.

    [What are position IDs?](https://huggingface.co/docs/transformers/glossary#position-ids)
* **head\_mask** (`Numpy array` or `tf.Tensor` of shape `(num_heads,)` or `(num_layers, num_heads)`, _optional_) — Mask to nullify selected heads of the self-attention modules. Mask values selected in `[0, 1]`:
  * 1 indicates the head is **not masked**,
  * 0 indicates the head is **masked**.
* **inputs\_embeds** (`tf.Tensor` of shape `(batch_size, sequence_length, hidden_size)`, _optional_) — Optionally, instead of passing `input_ids` you can choose to directly pass an embedded representation. This is useful if you want more control over how to convert `input_ids` indices into associated vectors than the model’s internal embedding lookup matrix.
* **output\_attentions** (`bool`, _optional_) — Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned tensors for more detail. This argument can be used only in eager mode, in graph mode the value in the config will be used instead.
* **output\_hidden\_states** (`bool`, _optional_) — Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for more detail. This argument can be used only in eager mode, in graph mode the value in the config will be used instead.
* **return\_dict** (`bool`, _optional_) — Whether or not to return a [ModelOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.utils.ModelOutput) instead of a plain tuple. This argument can be used in eager mode, in graph mode the value will always be set to True.
* **training** (`bool`, _optional_, defaults to `False`) — Whether or not to use the model in training mode (some modules like dropout modules have different behaviors between training and evaluation).
* **labels** (`tf.Tensor` of shape `(batch_size, sequence_length)`, _optional_) — Labels for computing the masked language modeling loss. Indices should be in `[-100, 0, ..., config.vocab_size]` (see `input_ids` docstring) Tokens with indices set to `-100` are ignored (masked), the loss is only computed for the tokens with labels

Returns

[transformers.modeling\_tf\_outputs.TFMaskedLMOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.modeling_tf_outputs.TFMaskedLMOutput) or `tuple(tf.Tensor)`

A [transformers.modeling\_tf\_outputs.TFMaskedLMOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.modeling_tf_outputs.TFMaskedLMOutput) or a tuple of `tf.Tensor` (if `return_dict=False` is passed or when `config.return_dict=False`) comprising various elements depending on the configuration ([MobileBertConfig](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.MobileBertConfig)) and inputs.

* **loss** (`tf.Tensor` of shape `(n,)`, _optional_, where n is the number of non-masked labels, returned when `labels` is provided) — Masked language modeling (MLM) loss.
* **logits** (`tf.Tensor` of shape `(batch_size, sequence_length, config.vocab_size)`) — Prediction scores of the language modeling head (scores for each vocabulary token before SoftMax).
*   **hidden\_states** (`tuple(tf.Tensor)`, _optional_, returned when `output_hidden_states=True` is passed or when `config.output_hidden_states=True`) — Tuple of `tf.Tensor` (one for the output of the embeddings + one for the output of each layer) of shape `(batch_size, sequence_length, hidden_size)`.

    Hidden-states of the model at the output of each layer plus the initial embedding outputs.
*   **attentions** (`tuple(tf.Tensor)`, _optional_, returned when `output_attentions=True` is passed or when `config.output_attentions=True`) — Tuple of `tf.Tensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length, sequence_length)`.

    Attentions weights after the attention softmax, used to compute the weighted average in the self-attention heads.

The [TFMobileBertForMaskedLM](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.TFMobileBertForMaskedLM) forward method, overrides the `__call__` special method.

Although the recipe for forward pass needs to be defined within this function, one should call the `Module` instance afterwards instead of this since the former takes care of running the pre and post processing steps while the latter silently ignores them.



Example:

Copied

```
>>> from transformers import AutoTokenizer, TFMobileBertForMaskedLM
>>> import tensorflow as tf

>>> tokenizer = AutoTokenizer.from_pretrained("google/mobilebert-uncased")
>>> model = TFMobileBertForMaskedLM.from_pretrained("google/mobilebert-uncased")

>>> inputs = tokenizer("The capital of France is [MASK].", return_tensors="tf")
>>> logits = model(**inputs).logits

>>> # retrieve index of [MASK]
>>> mask_token_index = tf.where((inputs.input_ids == tokenizer.mask_token_id)[0])
>>> selected_logits = tf.gather_nd(logits[0], indices=mask_token_index)

>>> predicted_token_id = tf.math.argmax(selected_logits, axis=-1)
>>> tokenizer.decode(predicted_token_id)
'paris'
```

Copied

```
>>> labels = tokenizer("The capital of France is Paris.", return_tensors="tf")["input_ids"]
>>> # mask labels of non-[MASK] tokens
>>> labels = tf.where(inputs.input_ids == tokenizer.mask_token_id, labels, -100)

>>> outputs = model(**inputs, labels=labels)
>>> round(float(outputs.loss), 2)
0.57
```

### TFMobileBertForNextSentencePrediction

#### class transformers.TFMobileBertForNextSentencePrediction

[\<source>](https://github.com/huggingface/transformers/blob/v4.34.1/src/transformers/models/mobilebert/modeling_tf_mobilebert.py#L1186)

( \*args\*\*kwargs )

Parameters

* **config** ([MobileBertConfig](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.MobileBertConfig)) — Model configuration class with all the parameters of the model. Initializing with a config file does not load the weights associated with the model, only the configuration. Check out the [from\_pretrained()](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/model#transformers.PreTrainedModel.from_pretrained) method to load the model weights.

MobileBert Model with a `next sentence prediction (classification)` head on top.

This model inherits from [TFPreTrainedModel](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/model#transformers.TFPreTrainedModel). Check the superclass documentation for the generic methods the library implements for all its model (such as downloading or saving, resizing the input embeddings, pruning heads etc.)

This model is also a [tf.keras.Model](https://www.tensorflow.org/api_docs/python/tf/keras/Model) subclass. Use it as a regular TF 2.0 Keras Model and refer to the TF 2.0 documentation for all matter related to general usage and behavior.

TensorFlow models and layers in `transformers` accept two formats as input:

* having all inputs as keyword arguments (like PyTorch models), or
* having all inputs as a list, tuple or dict in the first positional argument.

The reason the second format is supported is that Keras methods prefer this format when passing inputs to models and layers. Because of this support, when using methods like `model.fit()` things should “just work” for you - just pass your inputs and labels in any format that `model.fit()` supports! If, however, you want to use the second format outside of Keras methods like `fit()` and `predict()`, such as when creating your own layers or models with the Keras `Functional` API, there are three possibilities you can use to gather all the input Tensors in the first positional argument:

* a single Tensor with `input_ids` only and nothing else: `model(input_ids)`
* a list of varying length with one or several input Tensors IN THE ORDER given in the docstring: `model([input_ids, attention_mask])` or `model([input_ids, attention_mask, token_type_ids])`
* a dictionary with one or several input Tensors associated to the input names given in the docstring: `model({"input_ids": input_ids, "token_type_ids": token_type_ids})`

Note that when creating models and layers with [subclassing](https://keras.io/guides/making_new_layers_and_models_via_subclassing/) then you don’t need to worry about any of this, as you can just pass inputs like you would to any other Python function!

**call**

[\<source>](https://github.com/huggingface/transformers/blob/v4.34.1/src/transformers/models/mobilebert/modeling_tf_mobilebert.py#L1196)

( input\_ids: TFModelInputType | None = Noneattention\_mask: np.ndarray | tf.Tensor | None = Nonetoken\_type\_ids: np.ndarray | tf.Tensor | None = Noneposition\_ids: np.ndarray | tf.Tensor | None = Nonehead\_mask: np.ndarray | tf.Tensor | None = Noneinputs\_embeds: np.ndarray | tf.Tensor | None = Noneoutput\_attentions: Optional\[bool] = Noneoutput\_hidden\_states: Optional\[bool] = Nonereturn\_dict: Optional\[bool] = Nonenext\_sentence\_label: np.ndarray | tf.Tensor | None = Nonetraining: Optional\[bool] = False ) → [transformers.modeling\_tf\_outputs.TFNextSentencePredictorOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.modeling_tf_outputs.TFNextSentencePredictorOutput) or `tuple(tf.Tensor)`

Parameters

*   **input\_ids** (`Numpy array` or `tf.Tensor` of shape `(batch_size, sequence_length)`) — Indices of input sequence tokens in the vocabulary.

    Indices can be obtained using [AutoTokenizer](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/auto#transformers.AutoTokenizer). See [PreTrainedTokenizer.**call**()](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/vits#transformers.VitsTokenizer.__call__) and [PreTrainedTokenizer.encode()](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/tokenizer#transformers.PreTrainedTokenizerFast.encode) for details.

    [What are input IDs?](https://huggingface.co/docs/transformers/glossary#input-ids)
*   **attention\_mask** (`Numpy array` or `tf.Tensor` of shape `(batch_size, sequence_length)`, _optional_) — Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`:

    * 1 for tokens that are **not masked**,
    * 0 for tokens that are **masked**.

    [What are attention masks?](https://huggingface.co/docs/transformers/glossary#attention-mask)
*   **token\_type\_ids** (`Numpy array` or `tf.Tensor` of shape `(batch_size, sequence_length)`, _optional_) — Segment token indices to indicate first and second portions of the inputs. Indices are selected in `[0, 1]`:

    * 0 corresponds to a _sentence A_ token,
    * 1 corresponds to a _sentence B_ token.

    [What are token type IDs?](https://huggingface.co/docs/transformers/glossary#token-type-ids)
*   **position\_ids** (`Numpy array` or `tf.Tensor` of shape `(batch_size, sequence_length)`, _optional_) — Indices of positions of each input sequence tokens in the position embeddings. Selected in the range `[0, config.max_position_embeddings - 1]`.

    [What are position IDs?](https://huggingface.co/docs/transformers/glossary#position-ids)
* **head\_mask** (`Numpy array` or `tf.Tensor` of shape `(num_heads,)` or `(num_layers, num_heads)`, _optional_) — Mask to nullify selected heads of the self-attention modules. Mask values selected in `[0, 1]`:
  * 1 indicates the head is **not masked**,
  * 0 indicates the head is **masked**.
* **inputs\_embeds** (`tf.Tensor` of shape `(batch_size, sequence_length, hidden_size)`, _optional_) — Optionally, instead of passing `input_ids` you can choose to directly pass an embedded representation. This is useful if you want more control over how to convert `input_ids` indices into associated vectors than the model’s internal embedding lookup matrix.
* **output\_attentions** (`bool`, _optional_) — Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned tensors for more detail. This argument can be used only in eager mode, in graph mode the value in the config will be used instead.
* **output\_hidden\_states** (`bool`, _optional_) — Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for more detail. This argument can be used only in eager mode, in graph mode the value in the config will be used instead.
* **return\_dict** (`bool`, _optional_) — Whether or not to return a [ModelOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.utils.ModelOutput) instead of a plain tuple. This argument can be used in eager mode, in graph mode the value will always be set to True.
* **training** (`bool`, _optional_, defaults to `False`) — Whether or not to use the model in training mode (some modules like dropout modules have different behaviors between training and evaluation).

Returns

[transformers.modeling\_tf\_outputs.TFNextSentencePredictorOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.modeling_tf_outputs.TFNextSentencePredictorOutput) or `tuple(tf.Tensor)`

A [transformers.modeling\_tf\_outputs.TFNextSentencePredictorOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.modeling_tf_outputs.TFNextSentencePredictorOutput) or a tuple of `tf.Tensor` (if `return_dict=False` is passed or when `config.return_dict=False`) comprising various elements depending on the configuration ([MobileBertConfig](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.MobileBertConfig)) and inputs.

* **loss** (`tf.Tensor` of shape `(n,)`, _optional_, where n is the number of non-masked labels, returned when `next_sentence_label` is provided) — Next sentence prediction loss.
* **logits** (`tf.Tensor` of shape `(batch_size, 2)`) — Prediction scores of the next sequence prediction (classification) head (scores of True/False continuation before SoftMax).
*   **hidden\_states** (`tuple(tf.Tensor)`, _optional_, returned when `output_hidden_states=True` is passed or when `config.output_hidden_states=True`) — Tuple of `tf.Tensor` (one for the output of the embeddings + one for the output of each layer) of shape `(batch_size, sequence_length, hidden_size)`.

    Hidden-states of the model at the output of each layer plus the initial embedding outputs.
*   **attentions** (`tuple(tf.Tensor)`, _optional_, returned when `output_attentions=True` is passed or when `config.output_attentions=True`) — Tuple of `tf.Tensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length, sequence_length)`.

    Attentions weights after the attention softmax, used to compute the weighted average in the self-attention heads.

The [TFMobileBertForNextSentencePrediction](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.TFMobileBertForNextSentencePrediction) forward method, overrides the `__call__` special method.

Although the recipe for forward pass needs to be defined within this function, one should call the `Module` instance afterwards instead of this since the former takes care of running the pre and post processing steps while the latter silently ignores them.



Examples:

Copied

```
>>> import tensorflow as tf
>>> from transformers import AutoTokenizer, TFMobileBertForNextSentencePrediction

>>> tokenizer = AutoTokenizer.from_pretrained("google/mobilebert-uncased")
>>> model = TFMobileBertForNextSentencePrediction.from_pretrained("google/mobilebert-uncased")

>>> prompt = "In Italy, pizza served in formal settings, such as at a restaurant, is presented unsliced."
>>> next_sentence = "The sky is blue due to the shorter wavelength of blue light."
>>> encoding = tokenizer(prompt, next_sentence, return_tensors="tf")

>>> logits = model(encoding["input_ids"], token_type_ids=encoding["token_type_ids"])[0]
```

### TFMobileBertForSequenceClassification

#### class transformers.TFMobileBertForSequenceClassification

[\<source>](https://github.com/huggingface/transformers/blob/v4.34.1/src/transformers/models/mobilebert/modeling_tf_mobilebert.py#L1271)

( \*args\*\*kwargs )

Parameters

* **config** ([MobileBertConfig](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.MobileBertConfig)) — Model configuration class with all the parameters of the model. Initializing with a config file does not load the weights associated with the model, only the configuration. Check out the [from\_pretrained()](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/model#transformers.PreTrainedModel.from_pretrained) method to load the model weights.

MobileBert Model transformer with a sequence classification/regression head on top (a linear layer on top of the pooled output) e.g. for GLUE tasks.

This model inherits from [TFPreTrainedModel](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/model#transformers.TFPreTrainedModel). Check the superclass documentation for the generic methods the library implements for all its model (such as downloading or saving, resizing the input embeddings, pruning heads etc.)

This model is also a [tf.keras.Model](https://www.tensorflow.org/api_docs/python/tf/keras/Model) subclass. Use it as a regular TF 2.0 Keras Model and refer to the TF 2.0 documentation for all matter related to general usage and behavior.

TensorFlow models and layers in `transformers` accept two formats as input:

* having all inputs as keyword arguments (like PyTorch models), or
* having all inputs as a list, tuple or dict in the first positional argument.

The reason the second format is supported is that Keras methods prefer this format when passing inputs to models and layers. Because of this support, when using methods like `model.fit()` things should “just work” for you - just pass your inputs and labels in any format that `model.fit()` supports! If, however, you want to use the second format outside of Keras methods like `fit()` and `predict()`, such as when creating your own layers or models with the Keras `Functional` API, there are three possibilities you can use to gather all the input Tensors in the first positional argument:

* a single Tensor with `input_ids` only and nothing else: `model(input_ids)`
* a list of varying length with one or several input Tensors IN THE ORDER given in the docstring: `model([input_ids, attention_mask])` or `model([input_ids, attention_mask, token_type_ids])`
* a dictionary with one or several input Tensors associated to the input names given in the docstring: `model({"input_ids": input_ids, "token_type_ids": token_type_ids})`

Note that when creating models and layers with [subclassing](https://keras.io/guides/making_new_layers_and_models_via_subclassing/) then you don’t need to worry about any of this, as you can just pass inputs like you would to any other Python function!

**call**

[\<source>](https://github.com/huggingface/transformers/blob/v4.34.1/src/transformers/models/mobilebert/modeling_tf_mobilebert.py#L1294)

( input\_ids: TFModelInputType | None = Noneattention\_mask: np.ndarray | tf.Tensor | None = Nonetoken\_type\_ids: np.ndarray | tf.Tensor | None = Noneposition\_ids: np.ndarray | tf.Tensor | None = Nonehead\_mask: np.ndarray | tf.Tensor | None = Noneinputs\_embeds: np.ndarray | tf.Tensor | None = Noneoutput\_attentions: Optional\[bool] = Noneoutput\_hidden\_states: Optional\[bool] = Nonereturn\_dict: Optional\[bool] = Nonelabels: np.ndarray | tf.Tensor | None = Nonetraining: Optional\[bool] = False ) → [transformers.modeling\_tf\_outputs.TFSequenceClassifierOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.modeling_tf_outputs.TFSequenceClassifierOutput) or `tuple(tf.Tensor)`

Parameters

*   **input\_ids** (`Numpy array` or `tf.Tensor` of shape `(batch_size, sequence_length)`) — Indices of input sequence tokens in the vocabulary.

    Indices can be obtained using [AutoTokenizer](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/auto#transformers.AutoTokenizer). See [PreTrainedTokenizer.**call**()](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/vits#transformers.VitsTokenizer.__call__) and [PreTrainedTokenizer.encode()](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/tokenizer#transformers.PreTrainedTokenizerFast.encode) for details.

    [What are input IDs?](https://huggingface.co/docs/transformers/glossary#input-ids)
*   **attention\_mask** (`Numpy array` or `tf.Tensor` of shape `(batch_size, sequence_length)`, _optional_) — Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`:

    * 1 for tokens that are **not masked**,
    * 0 for tokens that are **masked**.

    [What are attention masks?](https://huggingface.co/docs/transformers/glossary#attention-mask)
*   **token\_type\_ids** (`Numpy array` or `tf.Tensor` of shape `(batch_size, sequence_length)`, _optional_) — Segment token indices to indicate first and second portions of the inputs. Indices are selected in `[0, 1]`:

    * 0 corresponds to a _sentence A_ token,
    * 1 corresponds to a _sentence B_ token.

    [What are token type IDs?](https://huggingface.co/docs/transformers/glossary#token-type-ids)
*   **position\_ids** (`Numpy array` or `tf.Tensor` of shape `(batch_size, sequence_length)`, _optional_) — Indices of positions of each input sequence tokens in the position embeddings. Selected in the range `[0, config.max_position_embeddings - 1]`.

    [What are position IDs?](https://huggingface.co/docs/transformers/glossary#position-ids)
* **head\_mask** (`Numpy array` or `tf.Tensor` of shape `(num_heads,)` or `(num_layers, num_heads)`, _optional_) — Mask to nullify selected heads of the self-attention modules. Mask values selected in `[0, 1]`:
  * 1 indicates the head is **not masked**,
  * 0 indicates the head is **masked**.
* **inputs\_embeds** (`tf.Tensor` of shape `(batch_size, sequence_length, hidden_size)`, _optional_) — Optionally, instead of passing `input_ids` you can choose to directly pass an embedded representation. This is useful if you want more control over how to convert `input_ids` indices into associated vectors than the model’s internal embedding lookup matrix.
* **output\_attentions** (`bool`, _optional_) — Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned tensors for more detail. This argument can be used only in eager mode, in graph mode the value in the config will be used instead.
* **output\_hidden\_states** (`bool`, _optional_) — Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for more detail. This argument can be used only in eager mode, in graph mode the value in the config will be used instead.
* **return\_dict** (`bool`, _optional_) — Whether or not to return a [ModelOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.utils.ModelOutput) instead of a plain tuple. This argument can be used in eager mode, in graph mode the value will always be set to True.
* **training** (`bool`, _optional_, defaults to `False`) — Whether or not to use the model in training mode (some modules like dropout modules have different behaviors between training and evaluation).
* **labels** (`tf.Tensor` of shape `(batch_size,)`, _optional_) — Labels for computing the sequence classification/regression loss. Indices should be in `[0, ..., config.num_labels - 1]`. If `config.num_labels == 1` a regression loss is computed (Mean-Square loss), If `config.num_labels > 1` a classification loss is computed (Cross-Entropy).

Returns

[transformers.modeling\_tf\_outputs.TFSequenceClassifierOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.modeling_tf_outputs.TFSequenceClassifierOutput) or `tuple(tf.Tensor)`

A [transformers.modeling\_tf\_outputs.TFSequenceClassifierOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.modeling_tf_outputs.TFSequenceClassifierOutput) or a tuple of `tf.Tensor` (if `return_dict=False` is passed or when `config.return_dict=False`) comprising various elements depending on the configuration ([MobileBertConfig](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.MobileBertConfig)) and inputs.

* **loss** (`tf.Tensor` of shape `(batch_size, )`, _optional_, returned when `labels` is provided) — Classification (or regression if config.num\_labels==1) loss.
* **logits** (`tf.Tensor` of shape `(batch_size, config.num_labels)`) — Classification (or regression if config.num\_labels==1) scores (before SoftMax).
*   **hidden\_states** (`tuple(tf.Tensor)`, _optional_, returned when `output_hidden_states=True` is passed or when `config.output_hidden_states=True`) — Tuple of `tf.Tensor` (one for the output of the embeddings + one for the output of each layer) of shape `(batch_size, sequence_length, hidden_size)`.

    Hidden-states of the model at the output of each layer plus the initial embedding outputs.
*   **attentions** (`tuple(tf.Tensor)`, _optional_, returned when `output_attentions=True` is passed or when `config.output_attentions=True`) — Tuple of `tf.Tensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length, sequence_length)`.

    Attentions weights after the attention softmax, used to compute the weighted average in the self-attention heads.

The [TFMobileBertForSequenceClassification](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.TFMobileBertForSequenceClassification) forward method, overrides the `__call__` special method.

Although the recipe for forward pass needs to be defined within this function, one should call the `Module` instance afterwards instead of this since the former takes care of running the pre and post processing steps while the latter silently ignores them.



Example:

Copied

```
>>> from transformers import AutoTokenizer, TFMobileBertForSequenceClassification
>>> import tensorflow as tf

>>> tokenizer = AutoTokenizer.from_pretrained("vumichien/emo-mobilebert")
>>> model = TFMobileBertForSequenceClassification.from_pretrained("vumichien/emo-mobilebert")

>>> inputs = tokenizer("Hello, my dog is cute", return_tensors="tf")

>>> logits = model(**inputs).logits

>>> predicted_class_id = int(tf.math.argmax(logits, axis=-1)[0])
>>> model.config.id2label[predicted_class_id]
'others'
```

Copied

```
>>> # To train a model on `num_labels` classes, you can pass `num_labels=num_labels` to `.from_pretrained(...)`
>>> num_labels = len(model.config.id2label)
>>> model = TFMobileBertForSequenceClassification.from_pretrained("vumichien/emo-mobilebert", num_labels=num_labels)

>>> labels = tf.constant(1)
>>> loss = model(**inputs, labels=labels).loss
>>> round(float(loss), 2)
4.72
```

### TFMobileBertForMultipleChoice

#### class transformers.TFMobileBertForMultipleChoice

[\<source>](https://github.com/huggingface/transformers/blob/v4.34.1/src/transformers/models/mobilebert/modeling_tf_mobilebert.py#L1460)

( \*args\*\*kwargs )

Parameters

* **config** ([MobileBertConfig](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.MobileBertConfig)) — Model configuration class with all the parameters of the model. Initializing with a config file does not load the weights associated with the model, only the configuration. Check out the [from\_pretrained()](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/model#transformers.PreTrainedModel.from_pretrained) method to load the model weights.

MobileBert Model with a multiple choice classification head on top (a linear layer on top of the pooled output and a softmax) e.g. for RocStories/SWAG tasks.

This model inherits from [TFPreTrainedModel](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/model#transformers.TFPreTrainedModel). Check the superclass documentation for the generic methods the library implements for all its model (such as downloading or saving, resizing the input embeddings, pruning heads etc.)

This model is also a [tf.keras.Model](https://www.tensorflow.org/api_docs/python/tf/keras/Model) subclass. Use it as a regular TF 2.0 Keras Model and refer to the TF 2.0 documentation for all matter related to general usage and behavior.

TensorFlow models and layers in `transformers` accept two formats as input:

* having all inputs as keyword arguments (like PyTorch models), or
* having all inputs as a list, tuple or dict in the first positional argument.

The reason the second format is supported is that Keras methods prefer this format when passing inputs to models and layers. Because of this support, when using methods like `model.fit()` things should “just work” for you - just pass your inputs and labels in any format that `model.fit()` supports! If, however, you want to use the second format outside of Keras methods like `fit()` and `predict()`, such as when creating your own layers or models with the Keras `Functional` API, there are three possibilities you can use to gather all the input Tensors in the first positional argument:

* a single Tensor with `input_ids` only and nothing else: `model(input_ids)`
* a list of varying length with one or several input Tensors IN THE ORDER given in the docstring: `model([input_ids, attention_mask])` or `model([input_ids, attention_mask, token_type_ids])`
* a dictionary with one or several input Tensors associated to the input names given in the docstring: `model({"input_ids": input_ids, "token_type_ids": token_type_ids})`

Note that when creating models and layers with [subclassing](https://keras.io/guides/making_new_layers_and_models_via_subclassing/) then you don’t need to worry about any of this, as you can just pass inputs like you would to any other Python function!

**call**

[\<source>](https://github.com/huggingface/transformers/blob/v4.34.1/src/transformers/models/mobilebert/modeling_tf_mobilebert.py#L1479)

( input\_ids: TFModelInputType | None = Noneattention\_mask: np.ndarray | tf.Tensor | None = Nonetoken\_type\_ids: np.ndarray | tf.Tensor | None = Noneposition\_ids: np.ndarray | tf.Tensor | None = Nonehead\_mask: np.ndarray | tf.Tensor | None = Noneinputs\_embeds: np.ndarray | tf.Tensor | None = Noneoutput\_attentions: Optional\[bool] = Noneoutput\_hidden\_states: Optional\[bool] = Nonereturn\_dict: Optional\[bool] = Nonelabels: np.ndarray | tf.Tensor | None = Nonetraining: Optional\[bool] = False ) → [transformers.modeling\_tf\_outputs.TFMultipleChoiceModelOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.modeling_tf_outputs.TFMultipleChoiceModelOutput) or `tuple(tf.Tensor)`

Parameters

*   **input\_ids** (`Numpy array` or `tf.Tensor` of shape `(batch_size, num_choices, sequence_length)`) — Indices of input sequence tokens in the vocabulary.

    Indices can be obtained using [AutoTokenizer](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/auto#transformers.AutoTokenizer). See [PreTrainedTokenizer.**call**()](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/vits#transformers.VitsTokenizer.__call__) and [PreTrainedTokenizer.encode()](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/tokenizer#transformers.PreTrainedTokenizerFast.encode) for details.

    [What are input IDs?](https://huggingface.co/docs/transformers/glossary#input-ids)
*   **attention\_mask** (`Numpy array` or `tf.Tensor` of shape `(batch_size, num_choices, sequence_length)`, _optional_) — Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`:

    * 1 for tokens that are **not masked**,
    * 0 for tokens that are **masked**.

    [What are attention masks?](https://huggingface.co/docs/transformers/glossary#attention-mask)
*   **token\_type\_ids** (`Numpy array` or `tf.Tensor` of shape `(batch_size, num_choices, sequence_length)`, _optional_) — Segment token indices to indicate first and second portions of the inputs. Indices are selected in `[0, 1]`:

    * 0 corresponds to a _sentence A_ token,
    * 1 corresponds to a _sentence B_ token.

    [What are token type IDs?](https://huggingface.co/docs/transformers/glossary#token-type-ids)
*   **position\_ids** (`Numpy array` or `tf.Tensor` of shape `(batch_size, num_choices, sequence_length)`, _optional_) — Indices of positions of each input sequence tokens in the position embeddings. Selected in the range `[0, config.max_position_embeddings - 1]`.

    [What are position IDs?](https://huggingface.co/docs/transformers/glossary#position-ids)
* **head\_mask** (`Numpy array` or `tf.Tensor` of shape `(num_heads,)` or `(num_layers, num_heads)`, _optional_) — Mask to nullify selected heads of the self-attention modules. Mask values selected in `[0, 1]`:
  * 1 indicates the head is **not masked**,
  * 0 indicates the head is **masked**.
* **inputs\_embeds** (`tf.Tensor` of shape `(batch_size, num_choices, sequence_length, hidden_size)`, _optional_) — Optionally, instead of passing `input_ids` you can choose to directly pass an embedded representation. This is useful if you want more control over how to convert `input_ids` indices into associated vectors than the model’s internal embedding lookup matrix.
* **output\_attentions** (`bool`, _optional_) — Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned tensors for more detail. This argument can be used only in eager mode, in graph mode the value in the config will be used instead.
* **output\_hidden\_states** (`bool`, _optional_) — Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for more detail. This argument can be used only in eager mode, in graph mode the value in the config will be used instead.
* **return\_dict** (`bool`, _optional_) — Whether or not to return a [ModelOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.utils.ModelOutput) instead of a plain tuple. This argument can be used in eager mode, in graph mode the value will always be set to True.
* **training** (`bool`, _optional_, defaults to `False`) — Whether or not to use the model in training mode (some modules like dropout modules have different behaviors between training and evaluation).
* **labels** (`tf.Tensor` of shape `(batch_size,)`, _optional_) — Labels for computing the multiple choice classification loss. Indices should be in `[0, ..., num_choices]` where `num_choices` is the size of the second dimension of the input tensors. (See `input_ids` above)

Returns

[transformers.modeling\_tf\_outputs.TFMultipleChoiceModelOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.modeling_tf_outputs.TFMultipleChoiceModelOutput) or `tuple(tf.Tensor)`

A [transformers.modeling\_tf\_outputs.TFMultipleChoiceModelOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.modeling_tf_outputs.TFMultipleChoiceModelOutput) or a tuple of `tf.Tensor` (if `return_dict=False` is passed or when `config.return_dict=False`) comprising various elements depending on the configuration ([MobileBertConfig](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.MobileBertConfig)) and inputs.

* **loss** (`tf.Tensor` of shape _(batch\_size, )_, _optional_, returned when `labels` is provided) — Classification loss.
*   **logits** (`tf.Tensor` of shape `(batch_size, num_choices)`) — _num\_choices_ is the second dimension of the input tensors. (see _input\_ids_ above).

    Classification scores (before SoftMax).
*   **hidden\_states** (`tuple(tf.Tensor)`, _optional_, returned when `output_hidden_states=True` is passed or when `config.output_hidden_states=True`) — Tuple of `tf.Tensor` (one for the output of the embeddings + one for the output of each layer) of shape `(batch_size, sequence_length, hidden_size)`.

    Hidden-states of the model at the output of each layer plus the initial embedding outputs.
*   **attentions** (`tuple(tf.Tensor)`, _optional_, returned when `output_attentions=True` is passed or when `config.output_attentions=True`) — Tuple of `tf.Tensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length, sequence_length)`.

    Attentions weights after the attention softmax, used to compute the weighted average in the self-attention heads.

The [TFMobileBertForMultipleChoice](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.TFMobileBertForMultipleChoice) forward method, overrides the `__call__` special method.

Although the recipe for forward pass needs to be defined within this function, one should call the `Module` instance afterwards instead of this since the former takes care of running the pre and post processing steps while the latter silently ignores them.



Example:

Copied

```
>>> from transformers import AutoTokenizer, TFMobileBertForMultipleChoice
>>> import tensorflow as tf

>>> tokenizer = AutoTokenizer.from_pretrained("google/mobilebert-uncased")
>>> model = TFMobileBertForMultipleChoice.from_pretrained("google/mobilebert-uncased")

>>> prompt = "In Italy, pizza served in formal settings, such as at a restaurant, is presented unsliced."
>>> choice0 = "It is eaten with a fork and a knife."
>>> choice1 = "It is eaten while held in the hand."

>>> encoding = tokenizer([prompt, prompt], [choice0, choice1], return_tensors="tf", padding=True)
>>> inputs = {k: tf.expand_dims(v, 0) for k, v in encoding.items()}
>>> outputs = model(inputs)  # batch size is 1

>>> # the linear classifier still needs to be trained
>>> logits = outputs.logits
```

### TFMobileBertForTokenClassification

#### class transformers.TFMobileBertForTokenClassification

[\<source>](https://github.com/huggingface/transformers/blob/v4.34.1/src/transformers/models/mobilebert/modeling_tf_mobilebert.py#L1561)

( \*args\*\*kwargs )

Parameters

* **config** ([MobileBertConfig](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.MobileBertConfig)) — Model configuration class with all the parameters of the model. Initializing with a config file does not load the weights associated with the model, only the configuration. Check out the [from\_pretrained()](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/model#transformers.PreTrainedModel.from_pretrained) method to load the model weights.

MobileBert Model with a token classification head on top (a linear layer on top of the hidden-states output) e.g. for Named-Entity-Recognition (NER) tasks.

This model inherits from [TFPreTrainedModel](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/model#transformers.TFPreTrainedModel). Check the superclass documentation for the generic methods the library implements for all its model (such as downloading or saving, resizing the input embeddings, pruning heads etc.)

This model is also a [tf.keras.Model](https://www.tensorflow.org/api_docs/python/tf/keras/Model) subclass. Use it as a regular TF 2.0 Keras Model and refer to the TF 2.0 documentation for all matter related to general usage and behavior.

TensorFlow models and layers in `transformers` accept two formats as input:

* having all inputs as keyword arguments (like PyTorch models), or
* having all inputs as a list, tuple or dict in the first positional argument.

The reason the second format is supported is that Keras methods prefer this format when passing inputs to models and layers. Because of this support, when using methods like `model.fit()` things should “just work” for you - just pass your inputs and labels in any format that `model.fit()` supports! If, however, you want to use the second format outside of Keras methods like `fit()` and `predict()`, such as when creating your own layers or models with the Keras `Functional` API, there are three possibilities you can use to gather all the input Tensors in the first positional argument:

* a single Tensor with `input_ids` only and nothing else: `model(input_ids)`
* a list of varying length with one or several input Tensors IN THE ORDER given in the docstring: `model([input_ids, attention_mask])` or `model([input_ids, attention_mask, token_type_ids])`
* a dictionary with one or several input Tensors associated to the input names given in the docstring: `model({"input_ids": input_ids, "token_type_ids": token_type_ids})`

Note that when creating models and layers with [subclassing](https://keras.io/guides/making_new_layers_and_models_via_subclassing/) then you don’t need to worry about any of this, as you can just pass inputs like you would to any other Python function!

**call**

[\<source>](https://github.com/huggingface/transformers/blob/v4.34.1/src/transformers/models/mobilebert/modeling_tf_mobilebert.py#L1585)

( input\_ids: TFModelInputType | None = Noneattention\_mask: np.ndarray | tf.Tensor | None = Nonetoken\_type\_ids: np.ndarray | tf.Tensor | None = Noneposition\_ids: np.ndarray | tf.Tensor | None = Nonehead\_mask: np.ndarray | tf.Tensor | None = Noneinputs\_embeds: np.ndarray | tf.Tensor | None = Noneoutput\_attentions: Optional\[bool] = Noneoutput\_hidden\_states: Optional\[bool] = Nonereturn\_dict: Optional\[bool] = Nonelabels: np.ndarray | tf.Tensor | None = Nonetraining: Optional\[bool] = False ) → [transformers.modeling\_tf\_outputs.TFTokenClassifierOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.modeling_tf_outputs.TFTokenClassifierOutput) or `tuple(tf.Tensor)`

Parameters

*   **input\_ids** (`Numpy array` or `tf.Tensor` of shape `(batch_size, sequence_length)`) — Indices of input sequence tokens in the vocabulary.

    Indices can be obtained using [AutoTokenizer](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/auto#transformers.AutoTokenizer). See [PreTrainedTokenizer.**call**()](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/vits#transformers.VitsTokenizer.__call__) and [PreTrainedTokenizer.encode()](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/tokenizer#transformers.PreTrainedTokenizerFast.encode) for details.

    [What are input IDs?](https://huggingface.co/docs/transformers/glossary#input-ids)
*   **attention\_mask** (`Numpy array` or `tf.Tensor` of shape `(batch_size, sequence_length)`, _optional_) — Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`:

    * 1 for tokens that are **not masked**,
    * 0 for tokens that are **masked**.

    [What are attention masks?](https://huggingface.co/docs/transformers/glossary#attention-mask)
*   **token\_type\_ids** (`Numpy array` or `tf.Tensor` of shape `(batch_size, sequence_length)`, _optional_) — Segment token indices to indicate first and second portions of the inputs. Indices are selected in `[0, 1]`:

    * 0 corresponds to a _sentence A_ token,
    * 1 corresponds to a _sentence B_ token.

    [What are token type IDs?](https://huggingface.co/docs/transformers/glossary#token-type-ids)
*   **position\_ids** (`Numpy array` or `tf.Tensor` of shape `(batch_size, sequence_length)`, _optional_) — Indices of positions of each input sequence tokens in the position embeddings. Selected in the range `[0, config.max_position_embeddings - 1]`.

    [What are position IDs?](https://huggingface.co/docs/transformers/glossary#position-ids)
* **head\_mask** (`Numpy array` or `tf.Tensor` of shape `(num_heads,)` or `(num_layers, num_heads)`, _optional_) — Mask to nullify selected heads of the self-attention modules. Mask values selected in `[0, 1]`:
  * 1 indicates the head is **not masked**,
  * 0 indicates the head is **masked**.
* **inputs\_embeds** (`tf.Tensor` of shape `(batch_size, sequence_length, hidden_size)`, _optional_) — Optionally, instead of passing `input_ids` you can choose to directly pass an embedded representation. This is useful if you want more control over how to convert `input_ids` indices into associated vectors than the model’s internal embedding lookup matrix.
* **output\_attentions** (`bool`, _optional_) — Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned tensors for more detail. This argument can be used only in eager mode, in graph mode the value in the config will be used instead.
* **output\_hidden\_states** (`bool`, _optional_) — Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for more detail. This argument can be used only in eager mode, in graph mode the value in the config will be used instead.
* **return\_dict** (`bool`, _optional_) — Whether or not to return a [ModelOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.utils.ModelOutput) instead of a plain tuple. This argument can be used in eager mode, in graph mode the value will always be set to True.
* **training** (`bool`, _optional_, defaults to `False`) — Whether or not to use the model in training mode (some modules like dropout modules have different behaviors between training and evaluation).
* **labels** (`tf.Tensor` of shape `(batch_size, sequence_length)`, _optional_) — Labels for computing the token classification loss. Indices should be in `[0, ..., config.num_labels - 1]`.

Returns

[transformers.modeling\_tf\_outputs.TFTokenClassifierOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.modeling_tf_outputs.TFTokenClassifierOutput) or `tuple(tf.Tensor)`

A [transformers.modeling\_tf\_outputs.TFTokenClassifierOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.modeling_tf_outputs.TFTokenClassifierOutput) or a tuple of `tf.Tensor` (if `return_dict=False` is passed or when `config.return_dict=False`) comprising various elements depending on the configuration ([MobileBertConfig](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.MobileBertConfig)) and inputs.

* **loss** (`tf.Tensor` of shape `(n,)`, _optional_, where n is the number of unmasked labels, returned when `labels` is provided) — Classification loss.
* **logits** (`tf.Tensor` of shape `(batch_size, sequence_length, config.num_labels)`) — Classification scores (before SoftMax).
*   **hidden\_states** (`tuple(tf.Tensor)`, _optional_, returned when `output_hidden_states=True` is passed or when `config.output_hidden_states=True`) — Tuple of `tf.Tensor` (one for the output of the embeddings + one for the output of each layer) of shape `(batch_size, sequence_length, hidden_size)`.

    Hidden-states of the model at the output of each layer plus the initial embedding outputs.
*   **attentions** (`tuple(tf.Tensor)`, _optional_, returned when `output_attentions=True` is passed or when `config.output_attentions=True`) — Tuple of `tf.Tensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length, sequence_length)`.

    Attentions weights after the attention softmax, used to compute the weighted average in the self-attention heads.

The [TFMobileBertForTokenClassification](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.TFMobileBertForTokenClassification) forward method, overrides the `__call__` special method.

Although the recipe for forward pass needs to be defined within this function, one should call the `Module` instance afterwards instead of this since the former takes care of running the pre and post processing steps while the latter silently ignores them.



Example:

Copied

```
>>> from transformers import AutoTokenizer, TFMobileBertForTokenClassification
>>> import tensorflow as tf

>>> tokenizer = AutoTokenizer.from_pretrained("vumichien/mobilebert-finetuned-ner")
>>> model = TFMobileBertForTokenClassification.from_pretrained("vumichien/mobilebert-finetuned-ner")

>>> inputs = tokenizer(
...     "BOINCAI is a company based in Paris and New York", add_special_tokens=False, return_tensors="tf"
... )

>>> logits = model(**inputs).logits
>>> predicted_token_class_ids = tf.math.argmax(logits, axis=-1)

>>> # Note that tokens are classified rather then input words which means that
>>> # there might be more predicted token classes than words.
>>> # Multiple token classes might account for the same word
>>> predicted_tokens_classes = [model.config.id2label[t] for t in predicted_token_class_ids[0].numpy().tolist()]
>>> predicted_tokens_classes
['I-ORG', 'I-ORG', 'O', 'O', 'O', 'O', 'O', 'I-LOC', 'O', 'I-LOC', 'I-LOC']
```

Copied

```
>>> labels = predicted_token_class_ids
>>> loss = tf.math.reduce_mean(model(**inputs, labels=labels).loss)
>>> round(float(loss), 2)
0.03
```

### TFMobileBertForQuestionAnswering

#### class transformers.TFMobileBertForQuestionAnswering

[\<source>](https://github.com/huggingface/transformers/blob/v4.34.1/src/transformers/models/mobilebert/modeling_tf_mobilebert.py#L1361)

( \*args\*\*kwargs )

Parameters

* **config** ([MobileBertConfig](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.MobileBertConfig)) — Model configuration class with all the parameters of the model. Initializing with a config file does not load the weights associated with the model, only the configuration. Check out the [from\_pretrained()](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/model#transformers.PreTrainedModel.from_pretrained) method to load the model weights.

MobileBert Model with a span classification head on top for extractive question-answering tasks like SQuAD (a linear layers on top of the hidden-states output to compute `span start logits` and `span end logits`).

This model inherits from [TFPreTrainedModel](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/model#transformers.TFPreTrainedModel). Check the superclass documentation for the generic methods the library implements for all its model (such as downloading or saving, resizing the input embeddings, pruning heads etc.)

This model is also a [tf.keras.Model](https://www.tensorflow.org/api_docs/python/tf/keras/Model) subclass. Use it as a regular TF 2.0 Keras Model and refer to the TF 2.0 documentation for all matter related to general usage and behavior.

TensorFlow models and layers in `transformers` accept two formats as input:

* having all inputs as keyword arguments (like PyTorch models), or
* having all inputs as a list, tuple or dict in the first positional argument.

The reason the second format is supported is that Keras methods prefer this format when passing inputs to models and layers. Because of this support, when using methods like `model.fit()` things should “just work” for you - just pass your inputs and labels in any format that `model.fit()` supports! If, however, you want to use the second format outside of Keras methods like `fit()` and `predict()`, such as when creating your own layers or models with the Keras `Functional` API, there are three possibilities you can use to gather all the input Tensors in the first positional argument:

* a single Tensor with `input_ids` only and nothing else: `model(input_ids)`
* a list of varying length with one or several input Tensors IN THE ORDER given in the docstring: `model([input_ids, attention_mask])` or `model([input_ids, attention_mask, token_type_ids])`
* a dictionary with one or several input Tensors associated to the input names given in the docstring: `model({"input_ids": input_ids, "token_type_ids": token_type_ids})`

Note that when creating models and layers with [subclassing](https://keras.io/guides/making_new_layers_and_models_via_subclassing/) then you don’t need to worry about any of this, as you can just pass inputs like you would to any other Python function!

**call**

[\<source>](https://github.com/huggingface/transformers/blob/v4.34.1/src/transformers/models/mobilebert/modeling_tf_mobilebert.py#L1380)

( input\_ids: TFModelInputType | None = Noneattention\_mask: np.ndarray | tf.Tensor | None = Nonetoken\_type\_ids: np.ndarray | tf.Tensor | None = Noneposition\_ids: np.ndarray | tf.Tensor | None = Nonehead\_mask: np.ndarray | tf.Tensor | None = Noneinputs\_embeds: np.ndarray | tf.Tensor | None = Noneoutput\_attentions: Optional\[bool] = Noneoutput\_hidden\_states: Optional\[bool] = Nonereturn\_dict: Optional\[bool] = Nonestart\_positions: np.ndarray | tf.Tensor | None = Noneend\_positions: np.ndarray | tf.Tensor | None = Nonetraining: Optional\[bool] = False ) → [transformers.modeling\_tf\_outputs.TFQuestionAnsweringModelOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.modeling_tf_outputs.TFQuestionAnsweringModelOutput) or `tuple(tf.Tensor)`

Parameters

*   **input\_ids** (`Numpy array` or `tf.Tensor` of shape `(batch_size, sequence_length)`) — Indices of input sequence tokens in the vocabulary.

    Indices can be obtained using [AutoTokenizer](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/auto#transformers.AutoTokenizer). See [PreTrainedTokenizer.**call**()](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/vits#transformers.VitsTokenizer.__call__) and [PreTrainedTokenizer.encode()](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/tokenizer#transformers.PreTrainedTokenizerFast.encode) for details.

    [What are input IDs?](https://huggingface.co/docs/transformers/glossary#input-ids)
*   **attention\_mask** (`Numpy array` or `tf.Tensor` of shape `(batch_size, sequence_length)`, _optional_) — Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`:

    * 1 for tokens that are **not masked**,
    * 0 for tokens that are **masked**.

    [What are attention masks?](https://huggingface.co/docs/transformers/glossary#attention-mask)
*   **token\_type\_ids** (`Numpy array` or `tf.Tensor` of shape `(batch_size, sequence_length)`, _optional_) — Segment token indices to indicate first and second portions of the inputs. Indices are selected in `[0, 1]`:

    * 0 corresponds to a _sentence A_ token,
    * 1 corresponds to a _sentence B_ token.

    [What are token type IDs?](https://huggingface.co/docs/transformers/glossary#token-type-ids)
*   **position\_ids** (`Numpy array` or `tf.Tensor` of shape `(batch_size, sequence_length)`, _optional_) — Indices of positions of each input sequence tokens in the position embeddings. Selected in the range `[0, config.max_position_embeddings - 1]`.

    [What are position IDs?](https://huggingface.co/docs/transformers/glossary#position-ids)
* **head\_mask** (`Numpy array` or `tf.Tensor` of shape `(num_heads,)` or `(num_layers, num_heads)`, _optional_) — Mask to nullify selected heads of the self-attention modules. Mask values selected in `[0, 1]`:
  * 1 indicates the head is **not masked**,
  * 0 indicates the head is **masked**.
* **inputs\_embeds** (`tf.Tensor` of shape `(batch_size, sequence_length, hidden_size)`, _optional_) — Optionally, instead of passing `input_ids` you can choose to directly pass an embedded representation. This is useful if you want more control over how to convert `input_ids` indices into associated vectors than the model’s internal embedding lookup matrix.
* **output\_attentions** (`bool`, _optional_) — Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned tensors for more detail. This argument can be used only in eager mode, in graph mode the value in the config will be used instead.
* **output\_hidden\_states** (`bool`, _optional_) — Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for more detail. This argument can be used only in eager mode, in graph mode the value in the config will be used instead.
* **return\_dict** (`bool`, _optional_) — Whether or not to return a [ModelOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.utils.ModelOutput) instead of a plain tuple. This argument can be used in eager mode, in graph mode the value will always be set to True.
* **training** (`bool`, _optional_, defaults to `False`) — Whether or not to use the model in training mode (some modules like dropout modules have different behaviors between training and evaluation).
* **start\_positions** (`tf.Tensor` of shape `(batch_size,)`, _optional_) — Labels for position (index) of the start of the labelled span for computing the token classification loss. Positions are clamped to the length of the sequence (`sequence_length`). Position outside of the sequence are not taken into account for computing the loss.
* **end\_positions** (`tf.Tensor` of shape `(batch_size,)`, _optional_) — Labels for position (index) of the end of the labelled span for computing the token classification loss. Positions are clamped to the length of the sequence (`sequence_length`). Position outside of the sequence are not taken into account for computing the loss.

Returns

[transformers.modeling\_tf\_outputs.TFQuestionAnsweringModelOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.modeling_tf_outputs.TFQuestionAnsweringModelOutput) or `tuple(tf.Tensor)`

A [transformers.modeling\_tf\_outputs.TFQuestionAnsweringModelOutput](https://huggingface.co/docs/transformers/v4.34.1/en/main_classes/output#transformers.modeling_tf_outputs.TFQuestionAnsweringModelOutput) or a tuple of `tf.Tensor` (if `return_dict=False` is passed or when `config.return_dict=False`) comprising various elements depending on the configuration ([MobileBertConfig](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.MobileBertConfig)) and inputs.

* **loss** (`tf.Tensor` of shape `(batch_size, )`, _optional_, returned when `start_positions` and `end_positions` are provided) — Total span extraction loss is the sum of a Cross-Entropy for the start and end positions.
* **start\_logits** (`tf.Tensor` of shape `(batch_size, sequence_length)`) — Span-start scores (before SoftMax).
* **end\_logits** (`tf.Tensor` of shape `(batch_size, sequence_length)`) — Span-end scores (before SoftMax).
*   **hidden\_states** (`tuple(tf.Tensor)`, _optional_, returned when `output_hidden_states=True` is passed or when `config.output_hidden_states=True`) — Tuple of `tf.Tensor` (one for the output of the embeddings + one for the output of each layer) of shape `(batch_size, sequence_length, hidden_size)`.

    Hidden-states of the model at the output of each layer plus the initial embedding outputs.
*   **attentions** (`tuple(tf.Tensor)`, _optional_, returned when `output_attentions=True` is passed or when `config.output_attentions=True`) — Tuple of `tf.Tensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length, sequence_length)`.

    Attentions weights after the attention softmax, used to compute the weighted average in the self-attention heads.

The [TFMobileBertForQuestionAnswering](https://huggingface.co/docs/transformers/v4.34.1/en/model_doc/mobilebert#transformers.TFMobileBertForQuestionAnswering) forward method, overrides the `__call__` special method.

Although the recipe for forward pass needs to be defined within this function, one should call the `Module` instance afterwards instead of this since the former takes care of running the pre and post processing steps while the latter silently ignores them.



Example:

Copied

```
>>> from transformers import AutoTokenizer, TFMobileBertForQuestionAnswering
>>> import tensorflow as tf

>>> tokenizer = AutoTokenizer.from_pretrained("vumichien/mobilebert-uncased-squad-v2")
>>> model = TFMobileBertForQuestionAnswering.from_pretrained("vumichien/mobilebert-uncased-squad-v2")

>>> question, text = "Who was Jim Henson?", "Jim Henson was a nice puppet"

>>> inputs = tokenizer(question, text, return_tensors="tf")
>>> outputs = model(**inputs)

>>> answer_start_index = int(tf.math.argmax(outputs.start_logits, axis=-1)[0])
>>> answer_end_index = int(tf.math.argmax(outputs.end_logits, axis=-1)[0])

>>> predict_answer_tokens = inputs.input_ids[0, answer_start_index : answer_end_index + 1]
>>> tokenizer.decode(predict_answer_tokens)
'a nice puppet'
```

Copied

```
>>> # target is "nice puppet"
>>> target_start_index = tf.constant([12])
>>> target_end_index = tf.constant([13])

>>> outputs = model(**inputs, start_positions=target_start_index, end_positions=target_end_index)
>>> loss = tf.math.reduce_mean(outputs.loss)
>>> round(float(loss), 2)
3.98
```
