NameError for moves in Py3 conditional

[ckald]

At this line: https://github.com/rossant/ipycache/blob/master/ipycache.py#L32

I don't see what it is supposed to be, so I'm just pointing out a bug

[ihrke]

I think that is an artifact copied over from the six library (they define moves to be a list of modules that have changed bw python2 and 3). I guess we should work on python3 compatibility at some point.

[rossant]

I don't think the library has ever been tested on Python 3. Some of the code already contains some Py3-compat functionality to make the transition a bit smoother. It shouldn't be too difficult to port the code to Python 3 now.