events.py 文件源码

def get_event_loop(self):
        """Get the event loop.

        This may be None or an instance of EventLoop.
        """
        if (self._local._loop is None and
            not self._local._set_called and
            isinstance(threading.current_thread(), threading._MainThread)):
            self.set_event_loop(self.new_event_loop())
        assert self._local._loop is not None, \
               ('There is no current event loop in thread %r.' %
                threading.current_thread().name)
        return self._local._loop