[PyQt] Detecting which Python version is used by SIP and PyQt

[Phil Thompson]

On Sat, 23 Oct 2010 17:39:28 +0100, Baz Walter <bazwal at ftml.net> wrote:
> On 23/10/10 12:25, Hans-Peter Jansen wrote:
>> On Saturday 23 October 2010, 02:54:40 Xavion wrote:
>>> Doing so will save me from having to hard-code something like
>>> "#!/usr/bin/env python2" into the main executable file, only to be
>>> disappointed after finding out that some Linux distributions have
>>> already built PyQt on Python v3.
>>
>> For a transition phase of a couple of years, I would do it the other
>> way around. Your distribution should have created a python3 symlink,
>> hence, if you code for python3, use #!/usr/bin/env python3, given it
>> isn't compatible with python<  3, otherwise use #!/usr/bin/env python.
> 
> not sure i understand you here. the current situation on arch is:
> 
>      python -> python3.1

That is unbelievably dumb.

>      python3 -> python3.1
>      python2 -> python2.7
> 
> so the problem is that it is now necessary to explicitly invoke python2 
> on arch if your program is incompatible with python3. i haven't really 
> researched this, but i think that whilst most distros provide python3 
> symlinks, far fewer provide python2 symlinks. also, i think it may be 
> more common for python to be a symlink for python-2.x, even when 
> python-3.x is also installed.

Phil