(self)
Return True if there is a sender waiting,
        or there are items in the buffer.
Return True if there is a sender waiting,
        or there are items in the buffer.
Return True if there is a sender waiting or there are items in the buffer .
def recv_ready(self):
        """
        Return True if there is a sender waiting,
        or there are items in the buffer.
        """
        raise NotImplementedError()
def recv_ready ( self ) : raise NotImplementedError ( )