Method _remove_writer

Lib/asyncio/selector_events.py:327–346

Remove a writer callback.

(self, fd)

        return handle

    def _remove_writer(self, fd):
        """Remove a writer callback."""
        if self.is_closed():
            return False
        key = self._selector.get_map().get(fd)
        if key is None:
            return False
        mask, (reader, writer) = key.events, key.data
        # Remove both writer and connector.
        mask &= ~selectors.EVENT_WRITE
        if not mask:
            self._selector.unregister(fd)
        else:
            self._selector.modify(fd, mask, (reader, None))

        if writer is not None:
            writer.cancel()
            return True
        else:
            return False

    def add_reader(self, fd, callback, *args):
        """Add a reader callback."""