wxversion

[christianbrodbeck]

The Matplotlib import fails if wxversion is not installed, even though wxPython does not seem to come with wxversion by default (at least not 3.0 on OS X) and I can't find a straight forward way to install wxversion (neither wxpython.org nor pypi). As far as I can see all wxversion is needed for is wxversion.ensureMinimal(str('2.8')) (

matplotlib/lib/matplotlib/backends/backend_wx.py

Line 66 in be24fc9

wxversion.ensureMinimal(str('2.8'))

and

matplotlib/setupext.py

Line 1782 in f4217db

wxversion.ensureMinimal('2.8')

). Wouldn't it be possible to fall back on wx.__version__ in case wxversion is missing? If so I could make a corresponding PR.

[tacaswell]

Yes, if you could make a PR that would be great. I am not sure who our current resident wx expert is, @wernerfb ?

[mdboom]

I'm extremely surprised that wxversion is not there. It's been a default part of wxpython since (at least) 2.4. See this:

http://www.wxpython.org/docs/api/wxversion-module.html

I'm not at my Mac to see if wxversion is there or not, but I do know I have it installed and used matplotlib without issue. So I think fundamentally there is something unusual about your environment.
The problem with falling back to wx.__version__ is that by that point it's too late to switch if the first wx version imported is wrong. But I suppose in lieu of anything else, it can't hurt.

[jenshnielsen]

Homebrew takes extra care to install wxversion with "INSTALL_MULTIVERSION=1" this is afaik mainly to support matplotlib. See https://github.com/Homebrew/homebrew/blob/master/Library/Formula/wxpython.rb

[christianbrodbeck]

@mdboom Yeah sorry you were right, it was actually a path problem.