/usr/lib/python2.7/dist-packages/ubuntu-sso-client/ubuntu_sso/utils/qtwisted.py is in python-ubuntu-sso-client 13.10-0ubuntu6.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#
# Copyright 2010-2012 Canonical Ltd.
#
# This program is free software: you can redistribute it and/or modify it
# under the terms of the GNU General Public License version 3, as published
# by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranties of
# MERCHANTABILITY, SATISFACTORY QUALITY, 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, see <http://www.gnu.org/licenses/>.
#
# In addition, as a special exception, the copyright holders give
# permission to link the code of portions of this program with the
# OpenSSL library under certain conditions as described in each
# individual source file, and distribute linked combinations
# including the two.
# You must obey the GNU General Public License in all respects
# for all of the code used other than OpenSSL. If you modify
# file(s) with this exception, you may extend this exception to your
# version of the file(s), but you are not obligated to do so. If you
# do not wish to do so, delete this exception statement from your
# version. If you delete this exception statement from all source
# files in the program, then also delete it here.
"""Platform specific constants and functions (for Qt/Twisted)."""
from twisted.internet import defer
from PyQt4.QtCore import QThread, QCoreApplication
class DeferredThread(QThread):
"""A thread that runs a given function."""
def __init__(self, f, *args, **kwargs):
"""Initialize this thread."""
app = QCoreApplication.instance()
super(DeferredThread, self).__init__(app)
self.deferred = defer.Deferred()
self.f = f
self.args = args
self.kwargs = kwargs
self.succeeded = True
self.result = None
self.finished.connect(self.on_finished)
def run(self):
"""This code runs inside the thread."""
try:
self.result = self.f(*self.args, **self.kwargs)
# pylint: disable=W0703
except Exception as e:
self.succeeded = False
self.result = e
def on_finished(self):
"""The thread has completed."""
if self.succeeded:
self.deferred.callback(self.result)
else:
self.deferred.errback(self.result)
# pylint: disable=C0103
def qtDeferToThread(f, *args, **kwargs):
"""A Qt-based implementation of deferToThread."""
thread = DeferredThread(f, *args, **kwargs)
thread.start()
return thread.deferred
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