Terminal process terminated with exit code: 127

I've just installed(and think I added the settings right from the warning...) and I'm trying to just do a hello world with py but it terminates with that 127 code error when I actually try to run it so I can't even attempt to see if it works.

The issue names the VS Code terminal and a Python hello-world attempt but no files or tests. Start by reproducing the terminal command that returns exit code 127 and inspect the installation and settings involved. Done means identifying the missing command or configuration and confirming that a Python hello-world program runs successfully.

Written by the indexing model from the issue text.