[zeromq-dev] querying what a SUB socket is subscribed to

[Jon Dyte]

Gaspar

You cannot query a socket on what subscriptions it has.

you can use setsockopt to subscribe and unsubscribe.


Jon


Körtesi Gáspár wrote:
> Hello,
>
> is there a way to query what subscriptions a socket has? I'm using PyZMQ 
> (2.1.10 with zmq 2.1.10), and I've tried getsockopt as suggested by the 
> documentation, but I get the following error:
>
>  >>> s.setsockopt(zmq.SUBSCRIBE, "foo")
>  >>> s.getsockopt(zmq.SUBSCRIBE)
> Traceback (most recent call last):
>    File "<stdin>", line 1, in <module>
>    File "socket.pyx", line 331, in zmq.core.socket.Socket.getsockopt 
> (zmq/core/socket.c:3202)
> zmq.core.error.ZMQError: Invalid argument
>
> What am I doing wrong?
>
>
> Thanks,
> Gaspar
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