Source code for orbax.checkpoint.checkpoint_handler
# Copyright 2024 The Orbax Authors.
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# Licensed under the Apache License, Version 2.0 (the "License");
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# http://www.apache.org/licenses/LICENSE-2.0
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"""CheckpointHandler interface."""
import abc
from typing import Any, Optional
from etils import epath
[docs]class CheckpointHandler(abc.ABC):
"""An interface providing save/restore methods used on a savable item.
Item may be a PyTree, Dataset, or any other supported object.
NOTE: Users should avoid using CheckpointHandler independently. Use
Checkpointer or CheckpointManager.
"""
[docs] @abc.abstractmethod
def save(self, directory: epath.Path, *args, **kwargs):
"""Saves the provided item synchronously.
Args:
directory: the directory to save to.
*args: additional arguments for save.
**kwargs: additional arguments for save.
"""
pass
[docs] @abc.abstractmethod
def restore(self, directory: epath.Path, *args, **kwargs) -> Any:
"""Restores the provided item synchronously.
Args:
directory: the directory to restore from.
*args: additional arguments for restore.
**kwargs: additional arguments for restore.
Returns:
The restored item.
"""
pass
[docs] def finalize(self, directory: epath.Path) -> None:
"""Optional, custom checkpoint finalization callback.
Will be called on a single worker after all workers have finished writing.
Args:
directory: the directory where the checkpoint is located.
"""
pass
[docs] def close(self):
"""Closes the CheckpointHandler."""
pass