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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 async def emit(self, event, data=None, namespace=None, callback=None):
 """Emit a custom event to the server. The only difference with the :func:`socketio.Client.emit` method is that when the ``namespace`` argument is not given the namespace associated with the class is used. Note: this method is a coroutine. """

        return await self.client.emit(event, data=data,
                                      namespace=namespace or self.namespace,
                                      callback=callback)