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 : //lib/python3.6/site-packages/cloudinit/sources/helpers/vmware/imc/nic.py
# Copyright (C) 2015 Canonical Ltd.
# Copyright (C) 2015 VMware Inc.
#
# Author: Sankar Tanguturi <stanguturi@vmware.com>
#
# This file is part of cloud-init. See LICENSE file for license information.

from cloudinit.sources.helpers.vmware.imc.boot_proto import BootProtoEnum
from cloudinit.sources.helpers.vmware.imc.nic_base import (
    NicBase,
    StaticIpv4Base,
    StaticIpv6Base,
)


class Nic(NicBase):
    """
    Holds the information about each NIC specified
    in the customization specification file
    """

    def __init__(self, name, configFile):
        self._name = name
        self._configFile = configFile

    def _get(self, what):
        return self._configFile.get(self.name + "|" + what, None)

    def _get_count_with_prefix(self, prefix):
        return self._configFile.get_count_with_prefix(self.name + prefix)

    @property
    def name(self):
        return self._name

    @property
    def mac(self):
        return self._get("MACADDR").lower()

    @property
    def primary(self):
        value = self._get("PRIMARY")
        if value:
            value = value.lower()
            return value == "yes" or value == "true"
        else:
            return False

    @property
    def onboot(self):
        value = self._get("ONBOOT")
        if value:
            value = value.lower()
            return value == "yes" or value == "true"
        else:
            return False

    @property
    def bootProto(self):
        value = self._get("BOOTPROTO")
        if value:
            return value.lower()
        else:
            return ""

    @property
    def ipv4_mode(self):
        value = self._get("IPv4_MODE")
        if value:
            return value.lower()
        else:
            return ""

    @property
    def staticIpv4(self):
        """
        Checks the BOOTPROTO property and returns StaticIPv4Addr
        configuration object if STATIC configuration is set.
        """
        if self.bootProto == BootProtoEnum.STATIC:
            return [StaticIpv4Addr(self)]
        else:
            return None

    @property
    def staticIpv6(self):
        cnt = self._get_count_with_prefix("|IPv6ADDR|")

        if not cnt:
            return None

        result = []
        for index in range(1, cnt + 1):
            result.append(StaticIpv6Addr(self, index))

        return result


class StaticIpv4Addr(StaticIpv4Base):
    """Static IPV4  Setting."""

    def __init__(self, nic):
        self._nic = nic

    @property
    def ip(self):
        return self._nic._get("IPADDR")

    @property
    def netmask(self):
        return self._nic._get("NETMASK")

    @property
    def gateways(self):
        value = self._nic._get("GATEWAY")
        if value:
            return [x.strip() for x in value.split(",")]
        else:
            return None


class StaticIpv6Addr(StaticIpv6Base):
    """Static IPV6 Address."""

    def __init__(self, nic, index):
        self._nic = nic
        self._index = index

    @property
    def ip(self):
        return self._nic._get("IPv6ADDR|" + str(self._index))

    @property
    def netmask(self):
        return self._nic._get("IPv6NETMASK|" + str(self._index))

    @property
    def gateway(self):
        return self._nic._get("IPv6GATEWAY|" + str(self._index))

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