How to get CommandLineTools to use a different version of Python

Question

I am using this C# code to call a python script.

Process.StartInfo = new ProcessStartInfo()
{
 FileName = @"/usr/bin/python3",
 Arguments = $@"{cmd} {args}", // cmd is the python script path
 RedirectStandardOutput = true,
 RedirectStandardError = true,
 UseShellExecute = false,
 CreateNoWindow = false
};

When I run my program, I get an OSError and noticed that the python interpreter is pointing to here: /Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/lib/python3.9/runpy.py

This error happens because this specific script being called runs on python3.11.

My question is, is there a way to properly change the version for CommandLineTools to use 3.11? I technically have a solution where I just copy the 3.11 folder into the ../../Versions folder and it works. This is not a good solution for me because I would have to do this for multiple systems. Is there another way around this? And why doesn't System.Diagnostics use the systems default python interpreter?

EDIT: I've learned that /Library/Developer/CommandLineTools come from Xcode. But how do I get my C# program to use usr/bin/python3 instead of ../CommandLineTools

• Mark Setchell: Why don't you put a proper Python 3.11 shebang as the first line of your Python script if that's the version it needs in order to run. Then you don't need to specify any Python version in your C#.
• Aaron Pascua: @MarkSetchell I don't have much jurisdiction on what I can do with the script. I've tried changing the shebang and it's a solution, but it's not good for long-time support.
• James Risner: @AaronPascua Please update your question with the output of the shell command set (trim to PATH, path, *py* or *pythin*. Also include the first line of the file at {cmd}.