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 : //proc/self/root/opt/imunify360/venv/lib64/python3.11/site-packages/setuptools/_itertools.py
from setuptools.extern.more_itertools import consume  # noqa: F401


# copied from jaraco.itertools 6.1
def ensure_unique(iterable, key=lambda x: x):
    """
    Wrap an iterable to raise a ValueError if non-unique values are encountered.

    >>> list(ensure_unique('abc'))
    ['a', 'b', 'c']
    >>> consume(ensure_unique('abca'))
    Traceback (most recent call last):
    ...
    ValueError: Duplicate element 'a' encountered.
    """
    seen = set()
    seen_add = seen.add
    for element in iterable:
        k = key(element)
        if k in seen:
            raise ValueError(f"Duplicate element {element!r} encountered.")
        seen_add(k)
        yield element

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