How do I tell a Python script to use a particular version?

[dil_bert]

How do I tell a Python script to use a particular version?
    
How do I, in the main.py module (presumably), tell Python which interpreter to use?
What I mean is: if I want a particular script to use version 2 of Python to interpret the entire program, how do I do that?

I know that you can run your programs/scripts with different versions by typing "Py -2 file.py" or "Py -3 file.py", but is there any way to run...

 

 

btw  if i do so - it fails

 py -2 cp1.py

 

martin@linux-3645:~/_dev_/python>  py -2 cp1.py
If 'py' is not a typo you can use command-not-found to lookup the package that contains it, like this:
    cnf py
martin@linux-3645:~/_dev_/python>

[requinix]

The script itself can't decide that. You either have to run the file with the right python version, or turn the file into a shell executable (chmod +x) with a shebang of one of

#!/usr/bin/env python2

#!/usr/bin/env python3

[dil_bert]

hello dear requinix,

 

many thanks for the quick answer. I tried it out. And yes: it works fine now.

 

Thanks for this help - it enables me to go further - and ahead with a certain project.

 

 

Greetings