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TorchCheckpointIO

class lightning_fabric.plugins.io.torch_io.TorchCheckpointIO[source]

Bases: lightning_fabric.plugins.io.checkpoint_io.CheckpointIO

CheckpointIO that utilizes torch.save() and torch.load() to save and load checkpoints respectively, common for most use cases.

load_checkpoint(path, map_location=<function TorchCheckpointIO.<lambda>>)[source]

Loads checkpoint using torch.load(), with additional handling for fsspec remote loading of files.

Parameters:
Return type:

Dict[str, Any]

Returns: The loaded checkpoint.

Raises:

FileNotFoundError – If path is not found by the fsspec filesystem

remove_checkpoint(path)[source]

Remove checkpoint file from the filesystem.

Parameters:

path (Union[str, Path]) – Path to checkpoint

Return type:

None

save_checkpoint(checkpoint, path, storage_options=None)[source]

Save model/training states as a checkpoint file through state-dump and file-write.

Parameters:
  • checkpoint (Dict[str, Any]) – dict containing model and trainer state

  • path (Union[str, Path]) – write-target path

  • storage_options (Optional[Any]) – not used in TorchCheckpointIO.save_checkpoint

Raises:

TypeError – If storage_options arg is passed in

Return type:

None


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