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venv/Lib/site-packages/pip/_internal/utils/models.py
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EvgeniyBudaev
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01 мар 2021, 15:20
01 мар 2021, 15:20
6f8a194
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"""Utilities for defining models """ # The following comment should be removed at some point in the future. # mypy: disallow-untyped-defs=False import operator class KeyBasedCompareMixin: """Provides comparison capabilities that is based on a key """ __slots__ = ['_compare_key', '_defining_class'] def __init__(self, key, defining_class): self._compare_key = key self._defining_class = defining_class def __hash__(self): return hash(self._compare_key) def __lt__(self, other): return self._compare(other, operator.__lt__) def __le__(self, other): return self._compare(other, operator.__le__) def __gt__(self, other): return self._compare(other, operator.__gt__) def __ge__(self, other): return self._compare(other, operator.__ge__) def __eq__(self, other): return self._compare(other, operator.__eq__) def _compare(self, other, method): if not isinstance(other, self._defining_class): return NotImplemented return method(self._compare_key, other._compare_key)