"""
Trainer
=======

The lightning trainer abstracts best practices for running a training, val, test routine.
 It calls parts of your model when it wants to hand over full control and otherwise makes
 training assumptions which are now standard practice in AI research.

This is the basic use of the trainer:

.. code-block:: python

    from pytorch_lightning import Trainer

    model = LightningTemplate()

    trainer = Trainer()
    trainer.fit(model)

"""