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。 sh-3ll

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DIR:/lib/python3.9/site-packages/dns/
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# Copyright (C) Dnspython Contributors, see LICENSE for text of ISC license

"""Common zone-related types."""

# This is a separate file to avoid import circularity between dns.zone and
# the implementation of the ZONEMD type.

import hashlib

import dns.enum


class DigestScheme(dns.enum.IntEnum):
    """ZONEMD Scheme"""

    SIMPLE = 1

    @classmethod
    def _maximum(cls):
        return 255


class DigestHashAlgorithm(dns.enum.IntEnum):
    """ZONEMD Hash Algorithm"""

    SHA384 = 1
    SHA512 = 2

    @classmethod
    def _maximum(cls):
        return 255


_digest_hashers = {
    DigestHashAlgorithm.SHA384: hashlib.sha384,
    DigestHashAlgorithm.SHA512: hashlib.sha512,
}