test_multiprocessing.py 文件源码

def test_timeout(self):
        old_timeout = socket.getdefaulttimeout()
        try:
            socket.setdefaulttimeout(0.1)
            parent, child = multiprocessing.Pipe(duplex=True)
            l = multiprocessing.connection.Listener(family='AF_INET')
            p = multiprocessing.Process(target=self._test_timeout,
                                        args=(child, l.address))
            p.start()
            child.close()
            self.assertEqual(parent.recv(), 123)
            parent.close()
            conn = l.accept()
            self.assertEqual(conn.recv(), 456)
            conn.close()
            l.close()
            p.join(10)
        finally:
            socket.setdefaulttimeout(old_timeout)

#
# Test what happens with no "if __name__ == '__main__'"
#