785 lines
27 KiB
Python
Executable File
785 lines
27 KiB
Python
Executable File
#!/usr/bin/env python
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# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright (c) 2011 X.commerce, a business unit of eBay Inc.
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# Copyright 2010 United States Government as represented by the
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# Administrator of the National Aeronautics and Space Administration.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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# Interactive shell based on Django:
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#
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# Copyright (c) 2005, the Lawrence Journal-World
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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#
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# 1. Redistributions of source code must retain the above copyright notice,
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# this list of conditions and the following disclaimer.
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#
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# 3. Neither the name of Django nor the names of its contributors may be
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# used to endorse or promote products derived from this software without
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# specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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"""
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CLI interface for manila management.
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"""
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import os
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import sys
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import uuid
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from sqlalchemy import create_engine, MetaData, Table
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from sqlalchemy.ext.declarative import declarative_base
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from sqlalchemy.orm import sessionmaker
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# If ../manila/__init__.py exists, add ../ to Python search path, so that
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# it will override what happens to be installed in /usr/(local/)lib/python...
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POSSIBLE_TOPDIR = os.path.normpath(os.path.join(os.path.abspath(sys.argv[0]),
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os.pardir,
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os.pardir))
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if os.path.exists(os.path.join(POSSIBLE_TOPDIR, 'manila', '__init__.py')):
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sys.path.insert(0, POSSIBLE_TOPDIR)
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from manila.openstack.common import gettextutils
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gettextutils.install('manila')
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from oslo.config import cfg
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from manila import context
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from manila import db
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from manila.db import migration
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from manila import exception
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from manila import flags
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from manila.openstack.common import log as logging
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from manila.openstack.common import rpc
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from manila.openstack.common import uuidutils
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from manila import utils
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from manila import version
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FLAGS = flags.FLAGS
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# Decorators for actions
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def args(*args, **kwargs):
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def _decorator(func):
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func.__dict__.setdefault('args', []).insert(0, (args, kwargs))
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return func
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return _decorator
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def param2id(object_id):
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"""Helper function to convert various id types to internal id.
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args: [object_id], e.g. 'vol-0000000a' or 'volume-0000000a' or '10'
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"""
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if uuidutils.is_uuid_like(object_id):
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return object_id
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elif '-' in object_id:
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# FIXME(ja): mapping occurs in nova?
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pass
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else:
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return int(object_id)
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class ShellCommands(object):
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def bpython(self):
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"""Runs a bpython shell.
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Falls back to Ipython/python shell if unavailable"""
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self.run('bpython')
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def ipython(self):
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"""Runs an Ipython shell.
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Falls back to Python shell if unavailable"""
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self.run('ipython')
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def python(self):
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"""Runs a python shell.
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Falls back to Python shell if unavailable"""
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self.run('python')
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@args('--shell', dest="shell",
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metavar='<bpython|ipython|python>',
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help='Python shell')
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def run(self, shell=None):
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"""Runs a Python interactive interpreter."""
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if not shell:
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shell = 'bpython'
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if shell == 'bpython':
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try:
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import bpython
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bpython.embed()
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except ImportError:
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shell = 'ipython'
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if shell == 'ipython':
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try:
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import IPython
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# Explicitly pass an empty list as arguments, because
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# otherwise IPython would use sys.argv from this script.
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shell = IPython.Shell.IPShell(argv=[])
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shell.mainloop()
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except ImportError:
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shell = 'python'
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if shell == 'python':
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import code
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try:
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# Try activating rlcompleter, because it's handy.
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import readline
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except ImportError:
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pass
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else:
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# We don't have to wrap the following import in a 'try',
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# because we already know 'readline' was imported successfully.
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import rlcompleter
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readline.parse_and_bind("tab:complete")
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code.interact()
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@args('--path', required=True, help='Script path')
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def script(self, path):
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"""Runs the script from the specifed path with flags set properly.
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arguments: path"""
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exec(compile(open(path).read(), path, 'exec'), locals(), globals())
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def _db_error(caught_exception):
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print caught_exception
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print _("The above error may show that the database has not "
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"been created.\nPlease create a database using "
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"'manila-manage db sync' before running this command.")
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exit(1)
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class HostCommands(object):
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"""List hosts."""
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@args('zone', nargs='?', default=None,
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help='Availability Zone (default: %(default)s)')
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def list(self, zone=None):
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"""Show a list of all physical hosts. Filter by zone.
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args: [zone]"""
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print "%-25s\t%-15s" % (_('host'),
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_('zone'))
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ctxt = context.get_admin_context()
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services = db.service_get_all(ctxt)
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if zone:
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services = [s for s in services if s['availability_zone'] == zone]
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hosts = []
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for srv in services:
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if not [h for h in hosts if h['host'] == srv['host']]:
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hosts.append(srv)
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for h in hosts:
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print "%-25s\t%-15s" % (h['host'], h['availability_zone'])
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class DbCommands(object):
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"""Class for managing the database."""
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def __init__(self):
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pass
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@args('version', nargs='?', default=None,
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help='Database version')
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def sync(self, version=None):
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"""Sync the database up to the most recent version."""
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return migration.db_sync(version)
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def version(self):
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"""Print the current database version."""
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print migration.db_version()
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class VersionCommands(object):
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"""Class for exposing the codebase version."""
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def __init__(self):
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pass
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def list(self):
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print(version.version_string())
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def __call__(self):
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self.list()
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class ImportCommands(object):
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"""Methods for importing Nova volumes to manila.
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EXPECTATIONS:
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These methods will do two things:
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1. Import relevant Nova DB info in to manila
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2. Import persistent tgt files from Nova to manila (see copy_tgt_files)
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If you're using VG's (local storage) for your backend YOU MUST install
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manila on the same node that you're migrating from.
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"""
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def __init__(self):
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pass
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def _map_table(self, table):
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class Mapper(declarative_base()):
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__table__ = table
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return Mapper
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def _open_session(self, con_info):
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# Note(jdg): The echo option below sets whether to dispaly db command
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# debug info.
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engine = create_engine(con_info,
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convert_unicode=True,
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echo=False)
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session = sessionmaker(bind=engine)
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return (session(), engine)
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def _backup_manila_db(self):
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#First, dump the dest_db as a backup incase this goes wrong
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manila_dump = utils.execute('mysqldump', 'manila')
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if 'Dump completed on' in manila_dump[0]:
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with open('./manila_db_bkup.sql', 'w+') as fo:
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for line in manila_dump:
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fo.write(line)
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else:
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raise exception.InvalidResults()
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def _import_db(self, src_db, dest_db, backup_db):
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# Remember order matters due to FK's
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table_list = ['sm_flavors',
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'sm_backend_config',
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'snapshots',
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'volume_types',
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'volumes',
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'iscsi_targets',
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'sm_volume',
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'volume_metadata',
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'volume_type_extra_specs']
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quota_table_list = ['quota_classes',
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'quota_usages',
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'quotas',
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'reservations']
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if backup_db > 0:
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if 'mysql:' not in dest_db:
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print (_('Sorry, only mysql backups are supported!'))
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raise exception.InvalidRequest()
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else:
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self._backup_manila_db()
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(src, src_engine) = self._open_session(src_db)
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src_meta = MetaData(bind=src_engine)
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(dest, dest_engine) = self._open_session(dest_db)
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# First make sure nova is at Folsom
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table = Table('migrate_version', src_meta, autoload=True)
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if src.query(table).first().version < 132:
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print (_('ERROR: Specified Nova DB is not at a compatible '
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'migration version!\nNova must be at Folsom or newer '
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'to import into manila database.'))
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sys.exit(2)
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for table_name in table_list:
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print (_('Importing table %s...') % table_name)
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table = Table(table_name, src_meta, autoload=True)
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new_row = self._map_table(table)
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columns = table.columns.keys()
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for row in src.query(table).all():
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data = dict([(str(column), getattr(row, column))
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for column in columns])
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dest.add(new_row(**data))
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dest.commit()
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for table_name in quota_table_list:
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print (_('Importing table %s...') % table_name)
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table = Table(table_name, src_meta, autoload=True)
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new_row = self._map_table(table)
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columns = table.columns.keys()
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for row in src.query(table).all():
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if row.resource == 'gigabytes' or row.resource == 'volumes':
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data = dict([(str(column), getattr(row, column))
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for column in columns])
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dest.add(new_row(**data))
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dest.commit()
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@args('src', metavar='<Nova DB>',
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help='db-engine://db_user[:passwd]@db_host[:port]\t\t'
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'example: mysql://root:secrete@192.168.137.1')
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@args('dest', metavar='<manila DB>',
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help='db-engine://db_user[:passwd]@db_host[:port]\t\t'
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'example: mysql://root:secrete@192.168.137.1')
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@args('--backup', metavar='<0|1>', choices=[0, 1], default=1,
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help='Perform mysqldump of manila db before writing to it'
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' (default: %(default)d)')
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def import_db(self, src_db, dest_db, backup_db=1):
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"""Import relevant volume DB entries from Nova into manila.
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NOTE:
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Your manila DB should be clean WRT volume entries.
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NOTE:
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We take an sqldump of the manila DB before mods
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If you're not using mysql, set backup_db=0
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and create your own backup.
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"""
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src_db = '%s/nova' % src_db
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dest_db = '%s/manila' % dest_db
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self._import_db(src_db, dest_db, backup_db)
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@args('src',
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help='e.g. (login@src_host:]/opt/stack/nova/volumes/)')
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@args('dest', nargs='?', default=None,
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help='e.g. (login@src_host:/opt/stack/manila/volumes/) '
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'optional, if emitted, \'volume_dir\' in config will be used')
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def copy_ptgt_files(self, src_tgts, dest_tgts=None):
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"""Copy persistent scsi tgt files from nova to manila.
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Default destination is FLAGS.volume_dir or state_path/volumes/
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PREREQUISITES:
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Persistent tgts were introduced in Folsom. If you're running
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Essex or other release, this script is unnecessary.
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NOTE:
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If you're using local VG's and LVM for your nova volume backend
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there's no point in copying these files over. Leave them on
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your Nova system as they won't do any good here.
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"""
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if dest_tgts is None:
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try:
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dest_tgts = FLAGS.volumes_dir
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except Exception:
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dest_tgts = '%s/volumes' % FLAGS.state_path
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utils.execute('rsync', '-avz', src_tgts, dest_tgts)
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class VolumeCommands(object):
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"""Methods for dealing with a cloud in an odd state."""
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@args('volume_id',
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help='Volume ID to be deleted')
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def delete(self, volume_id):
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"""Delete a volume, bypassing the check that it
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must be available."""
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ctxt = context.get_admin_context()
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volume = db.volume_get(ctxt, param2id(volume_id))
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host = volume['host']
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if not host:
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print "Volume not yet assigned to host."
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print "Deleting volume from database and skipping rpc."
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db.volume_destroy(ctxt, param2id(volume_id))
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return
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if volume['status'] == 'in-use':
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print "Volume is in-use."
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print "Detach volume from instance and then try again."
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return
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rpc.cast(ctxt,
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rpc.queue_get_for(ctxt, FLAGS.volume_topic, host),
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{"method": "delete_volume",
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"args": {"volume_id": volume['id']}})
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@args('volume_id',
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help='Volume ID to be reattached')
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def reattach(self, volume_id):
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"""Re-attach a volume that has previously been attached
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to an instance. Typically called after a compute host
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has been rebooted."""
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ctxt = context.get_admin_context()
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volume = db.volume_get(ctxt, param2id(volume_id))
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if not volume['instance_id']:
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print "volume is not attached to an instance"
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return
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instance = db.instance_get(ctxt, volume['instance_id'])
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host = instance['host']
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rpc.cast(ctxt,
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rpc.queue_get_for(ctxt, FLAGS.compute_topic, host),
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{"method": "attach_volume",
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"args": {"instance_id": instance['id'],
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"volume_id": volume['id'],
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"mountpoint": volume['mountpoint']}})
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class StorageManagerCommands(object):
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"""Class for mangaging Storage Backends and Flavors."""
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@args('flavor', nargs='?',
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help='flavor to be listed')
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def flavor_list(self, flavor=None):
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ctxt = context.get_admin_context()
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try:
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if flavor is None:
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flavors = db.sm_flavor_get_all(ctxt)
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else:
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flavors = db.sm_flavor_get(ctxt, flavor)
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except exception.NotFound as ex:
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print "error: %s" % ex
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sys.exit(2)
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print "%-18s\t%-20s\t%s" % (_('id'),
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_('Label'),
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_('Description'))
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for flav in flavors:
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print "%-18s\t%-20s\t%s" % (
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flav['id'],
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flav['label'],
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flav['description'])
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@args('label', help='flavor label')
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@args('desc', help='flavor description')
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def flavor_create(self, label, desc):
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# TODO(renukaapte) flavor name must be unique
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try:
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db.sm_flavor_create(context.get_admin_context(),
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dict(label=label,
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description=desc))
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except exception.DBError, e:
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_db_error(e)
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@args('label', help='label of flavor to be deleted')
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def flavor_delete(self, label):
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try:
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db.sm_flavor_delete(context.get_admin_context(), label)
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except exception.DBError, e:
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_db_error(e)
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def _splitfun(self, item):
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i = item.split("=")
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return i[0:2]
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@args('backend_conf_id', nargs='?', default=None)
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def backend_list(self, backend_conf_id=None):
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ctxt = context.get_admin_context()
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try:
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if backend_conf_id is None:
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backends = db.sm_backend_conf_get_all(ctxt)
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else:
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backends = db.sm_backend_conf_get(ctxt, backend_conf_id)
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except exception.NotFound as ex:
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print "error: %s" % ex
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sys.exit(2)
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print "%-5s\t%-10s\t%-40s\t%-10s\t%s" % (_('id'),
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_('Flavor id'),
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_('SR UUID'),
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_('SR Type'),
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_('Config Parameters'),)
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for b in backends:
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print "%-5s\t%-10s\t%-40s\t%-10s\t%s" % (b['id'],
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b['flavor_id'],
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b['sr_uuid'],
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b['sr_type'],
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b['config_params'],)
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@args('flavor_label')
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@args('sr_type')
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@args('args', nargs='*')
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def backend_add(self, flavor_label, sr_type, *args):
|
|
# TODO(renukaapte) Add backend_introduce.
|
|
ctxt = context.get_admin_context()
|
|
params = dict(map(self._splitfun, args))
|
|
sr_uuid = uuid.uuid4()
|
|
|
|
if flavor_label is None:
|
|
print "error: backend needs to be associated with flavor"
|
|
sys.exit(2)
|
|
|
|
try:
|
|
flavors = db.sm_flavor_get(ctxt, flavor_label)
|
|
|
|
except exception.NotFound as ex:
|
|
print "error: %s" % ex
|
|
sys.exit(2)
|
|
|
|
config_params = " ".join(
|
|
['%s=%s' % (key, params[key]) for key in params])
|
|
|
|
if 'sr_uuid' in params:
|
|
sr_uuid = params['sr_uuid']
|
|
try:
|
|
backend = db.sm_backend_conf_get_by_sr(ctxt, sr_uuid)
|
|
except exception.DBError, e:
|
|
_db_error(e)
|
|
|
|
if backend:
|
|
print 'Backend config found. Would you like to recreate this?'
|
|
print '(WARNING:Recreating will destroy all VDIs on backend!!)'
|
|
c = raw_input('Proceed? (y/n) ')
|
|
if c == 'y' or c == 'Y':
|
|
try:
|
|
db.sm_backend_conf_update(
|
|
ctxt, backend['id'],
|
|
dict(created=False,
|
|
flavor_id=flavors['id'],
|
|
sr_type=sr_type,
|
|
config_params=config_params))
|
|
except exception.DBError, e:
|
|
_db_error(e)
|
|
return
|
|
|
|
else:
|
|
print 'Backend config not found. Would you like to create it?'
|
|
|
|
print '(WARNING: Creating will destroy all data on backend!!!)'
|
|
c = raw_input('Proceed? (y/n) ')
|
|
if c == 'y' or c == 'Y':
|
|
try:
|
|
db.sm_backend_conf_create(ctxt,
|
|
dict(flavor_id=flavors['id'],
|
|
sr_uuid=sr_uuid,
|
|
sr_type=sr_type,
|
|
config_params=config_params))
|
|
except exception.DBError, e:
|
|
_db_error(e)
|
|
|
|
@args('backend_conf_id')
|
|
def backend_remove(self, backend_conf_id):
|
|
try:
|
|
db.sm_backend_conf_delete(context.get_admin_context(),
|
|
backend_conf_id)
|
|
|
|
except exception.DBError, e:
|
|
_db_error(e)
|
|
|
|
|
|
class ConfigCommands(object):
|
|
"""Class for exposing the flags defined by flag_file(s)."""
|
|
|
|
def __init__(self):
|
|
pass
|
|
|
|
def list(self):
|
|
for key, value in FLAGS.iteritems():
|
|
if value is not None:
|
|
print '%s = %s' % (key, value)
|
|
|
|
|
|
class GetLogCommands(object):
|
|
"""Get logging information."""
|
|
|
|
def errors(self):
|
|
"""Get all of the errors from the log files."""
|
|
error_found = 0
|
|
if FLAGS.log_dir:
|
|
logs = [x for x in os.listdir(FLAGS.log_dir) if x.endswith('.log')]
|
|
for file in logs:
|
|
log_file = os.path.join(FLAGS.log_dir, file)
|
|
lines = [line.strip() for line in open(log_file, "r")]
|
|
lines.reverse()
|
|
print_name = 0
|
|
for index, line in enumerate(lines):
|
|
if line.find(" ERROR ") > 0:
|
|
error_found += 1
|
|
if print_name == 0:
|
|
print log_file + ":-"
|
|
print_name = 1
|
|
print "Line %d : %s" % (len(lines) - index, line)
|
|
if error_found == 0:
|
|
print "No errors in logfiles!"
|
|
|
|
@args('num_entries', nargs='?', type=int, default=10,
|
|
help='Number of entries to list (default: %(default)d)')
|
|
def syslog(self, num_entries=10):
|
|
"""Get <num_entries> of the manila syslog events."""
|
|
entries = int(num_entries)
|
|
count = 0
|
|
log_file = ''
|
|
if os.path.exists('/var/log/syslog'):
|
|
log_file = '/var/log/syslog'
|
|
elif os.path.exists('/var/log/messages'):
|
|
log_file = '/var/log/messages'
|
|
else:
|
|
print "Unable to find system log file!"
|
|
sys.exit(1)
|
|
lines = [line.strip() for line in open(log_file, "r")]
|
|
lines.reverse()
|
|
print "Last %s manila syslog entries:-" % (entries)
|
|
for line in lines:
|
|
if line.find("manila") > 0:
|
|
count += 1
|
|
print "%s" % (line)
|
|
if count == entries:
|
|
break
|
|
|
|
if count == 0:
|
|
print "No manila entries in syslog!"
|
|
|
|
|
|
class ServiceCommands(object):
|
|
"""Methods for managing services."""
|
|
def list(self):
|
|
"""Show a list of all manila services."""
|
|
ctxt = context.get_admin_context()
|
|
services = db.service_get_all(ctxt)
|
|
print_format = "%-16s %-36s %-16s %-10s %-5s %-10s"
|
|
print print_format % (
|
|
_('Binary'),
|
|
_('Host'),
|
|
_('Zone'),
|
|
_('Status'),
|
|
_('State'),
|
|
_('Updated At'))
|
|
for svc in services:
|
|
alive = utils.service_is_up(svc)
|
|
art = ":-)" if alive else "XXX"
|
|
status = 'enabled'
|
|
if svc['disabled']:
|
|
status = 'disabled'
|
|
print print_format % (svc['binary'], svc['host'].partition('.')[0],
|
|
svc['availability_zone'], status, art,
|
|
svc['updated_at'])
|
|
|
|
|
|
CATEGORIES = {
|
|
'backup': BackupCommands,
|
|
'config': ConfigCommands,
|
|
'db': DbCommands,
|
|
'host': HostCommands,
|
|
'logs': GetLogCommands,
|
|
'service': ServiceCommands,
|
|
'shell': ShellCommands,
|
|
'sm': StorageManagerCommands,
|
|
'version': VersionCommands,
|
|
'volume': VolumeCommands,
|
|
'migrate': ImportCommands,
|
|
}
|
|
|
|
|
|
def methods_of(obj):
|
|
"""Get all callable methods of an object that don't start with underscore
|
|
returns a list of tuples of the form (method_name, method)"""
|
|
result = []
|
|
for i in dir(obj):
|
|
if callable(getattr(obj, i)) and not i.startswith('_'):
|
|
result.append((i, getattr(obj, i)))
|
|
return result
|
|
|
|
|
|
def add_command_parsers(subparsers):
|
|
for category in CATEGORIES:
|
|
command_object = CATEGORIES[category]()
|
|
|
|
parser = subparsers.add_parser(category)
|
|
parser.set_defaults(command_object=command_object)
|
|
|
|
category_subparsers = parser.add_subparsers(dest='action')
|
|
|
|
for (action, action_fn) in methods_of(command_object):
|
|
parser = category_subparsers.add_parser(action)
|
|
|
|
action_kwargs = []
|
|
for args, kwargs in getattr(action_fn, 'args', []):
|
|
parser.add_argument(*args, **kwargs)
|
|
|
|
parser.set_defaults(action_fn=action_fn)
|
|
parser.set_defaults(action_kwargs=action_kwargs)
|
|
|
|
|
|
category_opt = cfg.SubCommandOpt('category',
|
|
title='Command categories',
|
|
handler=add_command_parsers)
|
|
|
|
|
|
def get_arg_string(args):
|
|
arg = None
|
|
if args[0] == '-':
|
|
# (Note)zhiteng: args starts with FLAGS.oparser.prefix_chars
|
|
# is optional args. Notice that cfg module takes care of
|
|
# actual ArgParser so prefix_chars is always '-'.
|
|
if args[1] == '-':
|
|
# This is long optional arg
|
|
arg = args[2:]
|
|
else:
|
|
arg = args[3:]
|
|
else:
|
|
arg = args
|
|
|
|
return arg
|
|
|
|
|
|
def fetch_func_args(func):
|
|
fn_args = []
|
|
for args, kwargs in getattr(func, 'args', []):
|
|
arg = get_arg_string(args[0])
|
|
fn_args.append(getattr(FLAGS.category, arg))
|
|
|
|
return fn_args
|
|
|
|
|
|
def main():
|
|
"""Parse options and call the appropriate class/method."""
|
|
FLAGS.register_cli_opt(category_opt)
|
|
script_name = sys.argv[0]
|
|
if len(sys.argv) < 2:
|
|
print(_("\nOpenStack manila version: %(version)s\n") %
|
|
{'version': version.version_string()})
|
|
print script_name + " category action [<args>]"
|
|
print _("Available categories:")
|
|
for category in CATEGORIES:
|
|
print "\t%s" % category
|
|
sys.exit(2)
|
|
|
|
try:
|
|
flags.parse_args(sys.argv)
|
|
logging.setup("manila")
|
|
except cfg.ConfigFilesNotFoundError:
|
|
cfgfile = FLAGS.config_file[-1] if FLAGS.config_file else None
|
|
if cfgfile and not os.access(cfgfile, os.R_OK):
|
|
st = os.stat(cfgfile)
|
|
print _("Could not read %s. Re-running with sudo") % cfgfile
|
|
try:
|
|
os.execvp('sudo', ['sudo', '-u', '#%s' % st.st_uid] + sys.argv)
|
|
except Exception:
|
|
print _('sudo failed, continuing as if nothing happened')
|
|
|
|
print _('Please re-run manila-manage as root.')
|
|
sys.exit(2)
|
|
|
|
fn = FLAGS.category.action_fn
|
|
|
|
fn_args = fetch_func_args(fn)
|
|
fn(*fn_args)
|
|
|
|
if __name__ == '__main__':
|
|
main()
|