Re: @robin: wishes

> On Nov 12, 2015, at 9:21 AM, Dietmar Schwertberger <[email protected]> wrote:
> 
> Am 12.11.2015 um 17:26 schrieb Kevin Ollivier:
>> The demo code, like the wx.lib code, should run on any version of Python that wxPython supports, so yeah, any 2 / 3 differences need to be handled with some sort of wrapper. I think it has been handled with a mixture of using the six module along with some extra wxPython-specific wrapper code, but as I haven't been able to move to Python 3 myself yet, I'm not too familiar with the efforts to support Python 3.
> I have my application now working in both Python 2.7 with wxPython classic 2.8 and Python 3.4 with Phoenix.
> For the differences between 2.8 and Phoenix I have some ifs (mainly for the grid change events).
> For the differences between Python 2.7 and Python 3.4 there's not much:
> - almost all my files have a __future__ import
> - with some modules I need to take care of the small differences bytes/str/unicode vs. bytes/str
> 
> The typical start of a module looks like this:
> 
> # -*- coding: iso8859-1 -*-
> 
> from __future__ import print_function, absolute_import, unicode_literals
> 
> try:
> 
>    basestring
> 
> except:
> 
>    # Python 3
> 
>    basestring = (bytes, str)
> 
>    unicode = str
> 
> 
> 
> So I would assume that from six not more than the constants would be required. I'm not sure whether it makes sense to create a dependency here or whether it's better to just add these few lines to the demos that require it (or maybe to pack them into a small module).
> Personally, I would go for the second option.

In terms of the wxPython codebase, six is already available as part of the wxPython package in wx.lib.six, so that call has already been made. I don't know how extensively it is used, but probably best to just continue using it when we can, IMHO.

Regards,

Kevin

> Probably with Python versions <2.7 this approach will not work, but there's probably no point in supporting anything below 2.7 and 3.4 in Phoenix anyway.
> 
> 
> 
> Regards,
> 
> Dietmar
> 
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