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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# Copyright (C) 2013-2014 Canonical Ltd.
#
# Author: Scott Moser <scott.moser@canonical.com>
# Author: Blake Rouse <blake.rouse@canonical.com>
#
# This file is part of cloud-init. See LICENSE file for license information.
import abc
import io
from typing import Optional
from cloudinit.net.network_state import NetworkState
from cloudinit.net.udev import generate_udev_rule
def filter_by_type(match_type):
return lambda iface: match_type == iface["type"]
def filter_by_attr(match_name):
return lambda iface: (match_name in iface and iface[match_name])
filter_by_physical = filter_by_type("physical")
class Renderer(abc.ABC):
def __init__(self, config=None):
pass
@staticmethod
def _render_persistent_net(network_state: NetworkState):
"""Given state, emit udev rules to map mac to ifname."""
# TODO(harlowja): this seems shared between eni renderer and
# this, so move it to a shared location.
content = io.StringIO()
for iface in network_state.iter_interfaces(filter_by_physical):
# for physical interfaces write out a persist net udev rule
if "name" in iface and iface.get("mac_address"):
driver = iface.get("driver", None)
content.write(
generate_udev_rule(
iface["name"], iface["mac_address"], driver=driver
)
)
return content.getvalue()
@abc.abstractmethod
def render_network_state(
self,
network_state: NetworkState,
templates: Optional[dict] = None,
target=None,
) -> None:
"""Render network state."""