async.py 文件源码

def _notify(self):
        try:
            while not self.stopping:
                if not self.out_q:
                    # wait for jobs to complete
                    self.out_q_has_data.clear()
                    self.out_q_has_data.wait()
                    continue
                self.out_q.popleft().set()
        except BaseException:
            self._error()