def remove_handler(self, handler):
        """Remove a handler object.
        
        :Parameters:
            - `handler`: the object to remove
        """
        with self.lock:
            if self.handlers in handler:
                self.handlers.remove(handler)
                self._update_handlers()
dataset/ETHPy150Open kuri65536/python-for-android/python3-alpha/python-libs/pyxmpp2/mainloop/events.py/EventDispatcher.remove_handler/swapped operands of `in`