Trainer
The [Trainer] class provides an API for feature-complete training in PyTorch, and it supports distributed training on multiple GPUs/TPUs, mixed precision for NVIDIA GPUs, AMD GPUs, and torch.amp for PyTorch. [Trainer] goes hand-in-hand with the [TrainingArguments] class, which offers a wide range of options to customize how a model is trained. Together, these two classes provide a complete training API.
[Seq2SeqTrainer] and [Seq2SeqTrainingArguments] inherit from the [Trainer] and [TrainingArgument] classes and they're adapted for training models for sequence-to-sequence tasks such as summarization or translation.

The [Trainer] class is optimized for 🤗 Transformers models and can have surprising behaviors
when used with other models. When using it with your own model, make sure:

your model always return tuples or subclasses of [~utils.ModelOutput]
your model can compute the loss if a labels argument is provided and that loss is returned as the first
  element of the tuple (if your model returns tuples)
your model can accept multiple label arguments (use label_names in [TrainingArguments] to indicate their name to the [Trainer]) but none of them should be named "label"

Trainer[[api-reference]]
[[autodoc]] Trainer
    - all
Seq2SeqTrainer
[[autodoc]] Seq2SeqTrainer
    - evaluate
    - predict
TrainingArguments
[[autodoc]] TrainingArguments
    - all
Seq2SeqTrainingArguments
[[autodoc]] Seq2SeqTrainingArguments
    - all