晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 .
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Current File : //opt/imunify360/venv/lib64/python3.11/site-packages/pip/_internal/utils/models.py
"""Utilities for defining models
"""

import operator
from typing import Any, Callable, Type


class KeyBasedCompareMixin:
    """Provides comparison capabilities that is based on a key"""

    __slots__ = ["_compare_key", "_defining_class"]

    def __init__(self, key: Any, defining_class: Type["KeyBasedCompareMixin"]) -> None:
        self._compare_key = key
        self._defining_class = defining_class

    def __hash__(self) -> int:
        return hash(self._compare_key)

    def __lt__(self, other: Any) -> bool:
        return self._compare(other, operator.__lt__)

    def __le__(self, other: Any) -> bool:
        return self._compare(other, operator.__le__)

    def __gt__(self, other: Any) -> bool:
        return self._compare(other, operator.__gt__)

    def __ge__(self, other: Any) -> bool:
        return self._compare(other, operator.__ge__)

    def __eq__(self, other: Any) -> bool:
        return self._compare(other, operator.__eq__)

    def _compare(self, other: Any, method: Callable[[Any, Any], bool]) -> bool:
        if not isinstance(other, self._defining_class):
            return NotImplemented

        return method(self._compare_key, other._compare_key)

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