unix_events.py 文件源码

def _init_watcher(self):
        with events._lock:   # ?
            if self._watcher is None:  # pragma: no branch
                self._watcher = SafeChildWatcher()       # ?????

                # ????????
                if isinstance(threading.current_thread(), threading._MainThread):
                    self._watcher.attach_loop(self._local._loop)

    #
    # ????: ??????
    #