| from fastai.basic_train import Learner, LearnerCallback |
| from fastai.vision.gan import GANLearner |
|
|
|
|
| class GANSaveCallback(LearnerCallback): |
| """A `LearnerCallback` that saves history of metrics while training `learn` into CSV `filename`.""" |
|
|
| def __init__( |
| self, |
| learn: GANLearner, |
| learn_gen: Learner, |
| filename: str, |
| save_iters: int = 1000, |
| ): |
| super().__init__(learn) |
| self.learn_gen = learn_gen |
| self.filename = filename |
| self.save_iters = save_iters |
|
|
| def on_batch_end(self, iteration: int, epoch: int, **kwargs) -> None: |
| if iteration == 0: |
| return |
|
|
| if iteration % self.save_iters == 0: |
| self._save_gen_learner(iteration=iteration, epoch=epoch) |
|
|
| def _save_gen_learner(self, iteration: int, epoch: int): |
| filename = '{}_{}_{}'.format(self.filename, epoch, iteration) |
| self.learn_gen.save(filename) |
|
|
