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41 lines
1.3 KiB
41 lines
1.3 KiB
# 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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