Detect is python program run with python or python3

Question

I have a python program that can be run both: with python or python3:

# that
python app.py

# or that
python3 app.py

How to detect inside app.py program which command was used?
I tried to use sys.argv, but it doesn't contains such info.
Any ideas?

You could use sys.version_info at the top of the file?

Andrew
– Andrew

2020-04-17 12:29:52 +00:00
Commented Apr 17, 2020 at 12:29 — Andrew
– Andrew, Commented Apr 17, 2020 at 12:29

Ami Tavory · Accepted Answer · 2020-04-17 12:30:26Z

6

Try sys.version_info, specifically sys.version_info.major, which should be 2 or 3, respectively.

A different way is using the six package, with the booleans six.PY2 and six.PY3. This package should give other useful utilities for 2/3 compatibility.

answered Apr 17, 2020 at 12:30

Ami Tavory

76.7k13 gold badges152 silver badges196 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Badgy · Accepted Answer · 2020-04-17 12:30:09Z

3

import sys

print(sys.version)

answered Apr 17, 2020 at 12:30

Badgy

8194 silver badges14 bronze badges

Collectives™ on Stack Overflow

Detect is python program run with python or python3

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related