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/lib/python3.11/site-packages/playhouse/hybrid.py
from peewee import ModelDescriptor


# Hybrid methods/attributes, based on similar functionality in SQLAlchemy:
# http://docs.sqlalchemy.org/en/improve_toc/orm/extensions/hybrid.html
class hybrid_method(ModelDescriptor):
    def __init__(self, func, expr=None):
        self.func = func
        self.expr = expr or func

    def __get__(self, instance, instance_type):
        if instance is None:
            return self.expr.__get__(instance_type, instance_type.__class__)
        return self.func.__get__(instance, instance_type)

    def expression(self, expr):
        self.expr = expr
        return self


class hybrid_property(ModelDescriptor):
    def __init__(self, fget, fset=None, fdel=None, expr=None):
        self.fget = fget
        self.fset = fset
        self.fdel = fdel
        self.expr = expr or fget

    def __get__(self, instance, instance_type):
        if instance is None:
            return self.expr(instance_type)
        return self.fget(instance)

    def __set__(self, instance, value):
        if self.fset is None:
            raise AttributeError('Cannot set attribute.')
        self.fset(instance, value)

    def __delete__(self, instance):
        if self.fdel is None:
            raise AttributeError('Cannot delete attribute.')
        self.fdel(instance)

    def setter(self, fset):
        self.fset = fset
        return self

    def deleter(self, fdel):
        self.fdel = fdel
        return self

    def expression(self, expr):
        self.expr = expr
        return self

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