zmq/eventloop/zmqstream.py, python3 doesn't have callable

[indeyets]

zmqstream.py has:

assert callback is None or callable(callback)

in python3 it should be

assert callback is None or hasattr(callback, '__call__')

[minrk]

I'll merge this one before we cut the release, thanks.

The 2to3 hasattr check is not equivalent to callable, but it should be just fine for our purposes.

[takluyver]

Just to add: callable is actually back in Python 3.2. I appreciate that we want to support 3.1 and probably 3.0, but that might inform how we do it.

[minrk]

Thanks, that helps. I'll do a name check at the top, and add callable as a lambda at the top if it's undefined.

[minrk]

add callable where undefined (3.x < 3.2)

include test

closed by 2632a5c