Models
----------------------------------------------------

The base classes :class:`~transformers.PreTrainedModel` and :class:`~transformers.TFPreTrainedModel` implement the
common methods for loading/saving a model either from a local file or directory, or from a pretrained model
configuration provided by the library (downloaded from HuggingFace's AWS S3 repository).

:class:`~transformers.PreTrainedModel` and :class:`~transformers.TFPreTrainedModel` also implement a few methods which
are common among all the models to:

- resize the input token embeddings when new tokens are added to the vocabulary
- prune the attention heads of the model.

The other methods that are common to each model are defined in :class:`~transformers.modeling_utils.ModuleUtilsMixin`
(for the PyTorch models) and :class:`~transformers.modeling_tf_utils.TFModuleUtilsMixin` (for the TensorFlow models).


``PreTrainedModel``
~~~~~~~~~~~~~~~~~~~~~

.. autoclass:: transformers.PreTrainedModel
    :members:


``ModuleUtilsMixin``
~~~~~~~~~~~~~~~~~~~~

.. autoclass:: transformers.modeling_utils.ModuleUtilsMixin
    :members:


``TFPreTrainedModel``
~~~~~~~~~~~~~~~~~~~~~

.. autoclass:: transformers.TFPreTrainedModel
    :members:


``TFModelUtilsMixin``
~~~~~~~~~~~~~~~~~~~~~

.. autoclass:: transformers.modeling_tf_utils.TFModelUtilsMixin
    :members:
