dispatcher.py 文件源码

def _clear_dead_receivers(self):
        if self._dead_receivers:
            self._dead_receivers = False
            new_receivers = []
            for rec in self.receivers:
                if isinstance(rec[1], weakref.ReferenceType) and rec[1]() is None:
                    continue
                new_receivers.append(rec)
            self.receivers = new_receivers