lightning/docs/Trainer/Checkpointing.md

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Lightning can automate saving and loading checkpoints.
---
### Model saving
To enable checkpointing, define the checkpoint callback and give it to the trainer.
``` {.python}
from pytorch_lightning.utils.pt_callbacks import ModelCheckpoint
checkpoint_callback = ModelCheckpoint(
filepath='/path/to/store/weights.ckpt',
save_best_only=True,
verbose=True,
monitor='val_loss',
mode='min'
)
trainer = Trainer(checkpoint_callback=checkpoint_callback)
```