Question

I know how what to write in a python script to tell a unix box which version of python to run (#!/usr/bin/env python3.2), but how do I do that in windows. I will be deploying a program through distutils to windows boxes that have both python2.7 and 3.2 installed. I need to force it to use 2.7

Thanks!

Answer 1

Even on unix with a shebang (#!) you are not forcing which version to run under. If the program is not executed directly (./my.py) and instead is run like python2 my.py then Python 2 will still be used.

I would suggest the safest way is to check the version at the beginning of your script and bail out with an error message if it’s not suitable, for example:

if sys.version_info[:3] < (3,2,0):
    print('requires Python >= 3.2.0')
    sys.exit(1)