Emit a custom event to one or more connected clients.

        The only difference with the :func:`socketio.Server.emit` method is
        that when the ``namespace`` argument is not given the namespace
        associated with the class is used.

def emit(self, event, data=None, room=None, skip_sid=None, namespace=None,
             callback=None):
        """Emit a custom event to one or more connected clients.

        The only difference with the :func:`socketio.Server.emit` method is
        that when the ``namespace`` argument is not given the namespace
        associated with the class is used.
        """
        return self.server.emit(event, data=data, room=room, skip_sid=skip_sid,
                                namespace=namespace or self.namespace,
                                callback=callback)