(self)
Return the next message published on the Socket.IO channel,
        blocking until a message is available.

        This method needs to be implemented by the different subclasses that
        support pub/sub backends.
Return the next message published on the Socket.IO channel,
        blocking until a message is available.
Return the next message published on the Socket . IO channel blocking until a message is available .
def _listen(self):
        """Return the next message published on the Socket.IO channel,
        blocking until a message is available.

        This method needs to be implemented by the different subclasses that
        support pub/sub backends.
        """
        raise NotImplementedError('This method must be implemented in a '
                                  'subclass.')
def _listen ( self ) : raise NotImplementedError ( 'This method must be implemented in a ' 'subclass.' )