That solves one slice of the problem, now how do I distinguish between waycoolscript.py written for python3.0 and waycoolscript.py for python2.4? I could live

That solves one slice of the problem, now how do I distinguish between waycoolscript.py written for python3.0 and waycoolscript.py for python2.4? I could live with *.py3 for a few years (remember php3?) but it's kind of a wart. And the thing I like about python is the core teams assiduous avoidance of warts.