def registerAccountClient(self, client):
        """Notify the user that an account client has been signed on to.

        @type client: L{Client<interfaces.IClient>}
        """
        if not self.clients in client:
            self.clients.append(client)
dataset/ETHPy150Open kuri65536/python-for-android/python-modules/twisted/twisted/words/im/basechat.py/ContactsList.registerAccountClient/swapped operands of `in`