def _remove_io_handler(self, handler):
        """Remove an i/o-handler."""
        if self._unprepared_handlers in handler:
            old_fileno = self._unprepared_handlers[handler]
            del self._unprepared_handlers[handler]
        else:
            old_fileno = handler.fileno()
        if old_fileno is not None:
            try:
                del self._handlers[old_fileno]
                self.poll.unregister(old_fileno)
            except KeyError:
                pass
dataset/ETHPy150Open kuri65536/python-for-android/python3-alpha/python-libs/pyxmpp2/mainloop/poll.py/PollMainLoop._remove_io_handler/swapped operands of `in`