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https://github.com/zebrajr/pytorch.git
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a8d9fbb021
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/73766 Test Plan: Imported from OSS Reviewed By: zou3519, Chillee Differential Revision: D34630217 Pulled By: jamesr66a fbshipit-source-id: f23420deaeed7e54d5e6759b486ca4a02243a7b3 (cherry picked from commit 8854c60e60e79b144077f3021d305ea3d06a2a21)
51 lines
2.1 KiB
Python
51 lines
2.1 KiB
Python
from typing import Any, Dict, Tuple, List
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from ._compatibility import compatibility
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from torch.utils._pytree import Context, _register_pytree_node
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_help_mutation = """\
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If you are attempting to modify the kwargs or args of a torch.fx.Node object,
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instead create a new copy of it and assign the copy to the node:
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new_args = ... # copy and mutate args
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node.args = new_args
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"""
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def _no_mutation(self, *args, **kwargs):
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raise NotImplementedError(f"'{type(self).__name__}' object does not support mutation. {_help_mutation}")
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def _create_immutable_container(base, mutable_functions):
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container = type('immutable_' + base.__name__, (base,), {})
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for attr in mutable_functions:
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setattr(container, attr, _no_mutation)
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return container
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immutable_list = _create_immutable_container(list,
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['__delitem__', '__iadd__', '__imul__', '__setitem__', 'append',
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'clear', 'extend', 'insert', 'pop', 'remove'])
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immutable_list.__reduce__ = lambda self: (immutable_list, (tuple(iter(self)),))
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compatibility(is_backward_compatible=True)(immutable_list)
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immutable_dict = _create_immutable_container(dict, ['__delitem__', '__setitem__', 'clear', 'pop', 'popitem', 'update'])
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immutable_dict.__reduce__ = lambda self: (immutable_dict, (iter(self.items()),))
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compatibility(is_backward_compatible=True)(immutable_dict)
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# Register immutable collections for PyTree operations
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def _immutable_dict_flatten(d: Dict[Any, Any]) -> Tuple[List[Any], Context]:
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return list(d.values()), list(d.keys())
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def _immutable_dict_unflatten(values: List[Any], context: Context) -> Dict[Any, Any]:
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return immutable_dict({key: value for key, value in zip(context, values)})
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def _immutable_list_flatten(d: List[Any]) -> Tuple[List[Any], Context]:
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return d, None
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def _immutable_list_unflatten(values: List[Any], context: Context) -> List[Any]:
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return immutable_list(values)
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_register_pytree_node(immutable_dict, _immutable_dict_flatten, _immutable_dict_unflatten)
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_register_pytree_node(immutable_list, _immutable_list_flatten, _immutable_list_unflatten)
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