Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I'm new to Windows 7 and with my Python installation. When I specify in cmd.exe and hit Return/Enter, instead of executing the python file, I am given an error message (sth like "not a command").

How do I tell Windows to run the Python interpreter when specifying or double-clicking a Python script?

share|improve this question

Associate the .py extension with the python.exe interpreter executable. Normally the installer does this for you.

share|improve this answer
Thanks, and here's how to: – new Jun 22 '10 at 8:43
I'd rather suggest to associate the .py extension with the pythonw.exe by default, to anticipate the question "It works now, but I don't want to see that cmd window." – vtest Jun 22 '10 at 11:21

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.