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 : //usr/bin/repoclosure
#!/usr/libexec/platform-python
# The dnf-utils executable script.
#
# Copyright (C) 2017 Red Hat, Inc.
#
# This copyrighted material is made available to anyone wishing to use,
# modify, copy, or redistribute it subject to the terms and conditions of
# the GNU General Public License v.2, or (at your option) any later version.
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY expressed or implied, including the implied warranties of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
# Public License for more details.  You should have received a copy of the
# GNU General Public License along with this program; if not, write to the
# Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301, USA.  Any Red Hat trademarks that are incorporated in the
# source code or documentation are not subject to the GNU General Public
# License and may only be used or replicated with the express permission of
# Red Hat, Inc.
#

from __future__ import unicode_literals
import sys
import os.path

MAPPING = {'debuginfo-install': ['debuginfo-install'],
           'needs-restarting': ['needs-restarting'],
           'find-repos-of-install': ['list', 'installed'],
           'package-cleanup': [],
           'repo-graph': ['repograph'],
           'repoclosure': ['repoclosure'],
           'repodiff': ['repodiff'],
           'repomanage': ['repomanage'],
           'repoquery': ['repoquery'],
           'reposync': ['reposync'],
           'repotrack': ['download', '--resolve', '--alldeps'],
           'yum-builddep': ['builddep'],
           'yum-config-manager': ['config-manager'],
           'yum-debug-dump': ['debug-dump'],
           'yum-debug-restore': ['debug-restore'],
           'yum-groups-manager': ['groups-manager'],
           'yumdownloader': ['download']
           }

def suppress_keyboard_interrupt_message():
    """Prevent unsightly KeyboardInterrupt tracebacks.

    Nothing will be printed to the terminal after an uncaught
    :class:`exceptions.KeyboardInterrupt`.

    """
    old_excepthook = sys.excepthook

    def new_hook(type, value, traceback):
        if type != KeyboardInterrupt:
            old_excepthook(type, value, traceback)
        else:
            pass

    sys.excepthook = new_hook


# do this ASAP to prevent tracebacks after ^C during imports
suppress_keyboard_interrupt_message()

if __name__ != "__main__":
    sys.stderr.write('The executable DNF module must not be imported.')
    sys.exit(1)

here = sys.path[0]
if here != '/usr/bin':
    # git checkout
    import os
    dnf_toplevel = os.path.dirname(here)
    sys.path[0] = dnf_toplevel

from dnf.cli import main
command = os.path.basename(sys.argv[0])
args = sys.argv[1:]

if command == 'package-cleanup':
    if '--dupes' in args:
        args[args.index('--dupes')] = '--duplicates'
        MAPPING[command] = ['repoquery']
    elif '--leaves' in args:
        args[args.index('--leaves')] = '--unneeded'
        MAPPING[command] = ['repoquery']
    elif '--orphans' in args:
        args[args.index('--orphans')] = '--extras'
        MAPPING[command] = ['repoquery']
    elif '--problems' in args:
        args[args.index('--problems')] = '--unsatisfied'
        MAPPING[command] = ['repoquery']
    elif '--cleandupes' in args:
        args[args.index('--cleandupes')] = '--duplicates'
        MAPPING[command] = ['remove']
    else:
        sys.stderr.write('package-cleanup has to be executed with one of the options: --dupes, '
                         '--leaves, --orphans, --problems or --cleandupes\n')
        sys.exit(1)

main.user_main(MAPPING[command] + args, exit_code=True)

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