42 lines
1.3 KiB
Python
42 lines
1.3 KiB
Python
# Copyright 2021-present MongoDB, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Setstate and getstate functions for objects with __slots__, allowing
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compatibility with default pickling protocol
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"""
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from typing import Any, Mapping
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def _setstate_slots(self: Any, state: Any) -> None:
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for slot, value in state.items():
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setattr(self, slot, value)
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def _mangle_name(name: str, prefix: str) -> str:
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if name.startswith("__"):
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prefix = "_" + prefix
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else:
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prefix = ""
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return prefix + name
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def _getstate_slots(self: Any) -> Mapping[Any, Any]:
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prefix = self.__class__.__name__
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ret = {}
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for name in self.__slots__:
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mangled_name = _mangle_name(name, prefix)
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if hasattr(self, mangled_name):
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ret[mangled_name] = getattr(self, mangled_name)
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return ret
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