Windows: subprocess won't run different Python interpreter

[Thorsten Kampe]

Hi,

I'm trying to run a script with a different Python version by 
extending the path variable and executing "python.exe". It looks like 
subprocess will always run the current executing Python.

The following snippet demonstrates the problem:
"""
import os, subprocess
os.environ['PATH'] = ''
print(subprocess.check_output(['python.exe', '-V']))
"""

It outputs the version of the current executing Python interpreter 
although it should generate an error because Python is not in the 
PATH.

Thorsten