38 lines
1.1 KiB
Python
38 lines
1.1 KiB
Python
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from typing import cast, Dict, Optional
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import torch.nn as nn
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class _State:
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pass
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_module_state_mapping: Dict[nn.Module, _State] = {}
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def _insert_module_state(module: nn.Module, state: _State) -> None:
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global _module_state_mapping
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assert module not in _module_state_mapping, f"Inserting {module} more than once."
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_module_state_mapping[module] = state
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def _get_module_state(module: nn.Module) -> Optional[_State]:
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"""
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Return the ``_State`` in ``model``.
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Given a ``module``, this API finds out if the module is also a ``_State``
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instance or if the module is managed by a composable API. If the module
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is also a ``_State``, ``module`` will be casted to ``_State` and returned.
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If it is managed by a composable API, the corresponding ``_State`` will
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be returned.
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"""
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global _module_state_mapping
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if isinstance(module, _State):
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return cast(_State, module)
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else:
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# https://github.com/pytorch/pytorch/issues/107054
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if module in _module_state_mapping:
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return _module_state_mapping[module]
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else:
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return None
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