Feature or enhancement

Display the invoked executable name such as python3 or python.exe so users can copy and paste without having to translate, for tools such as ast and json.tool.

Pitch

The example below shows a before usage of json.tool and an after below.

$ python3 -m json.tool -h
usage: python -m json.tool [-h] [--sort-keys] [--json-lines] [infile] [outfile]

becomes

$ python3 -m json.tool -h
usage: python3 -m json.tool [-h] [--sort-keys] [--json-lines] [infile] [outfile]

This is more friendly to users on windows because of the .exe extension and to *nix users who's OS might install python 3 at python3 and have an old python2 version somewhere else. Or as we move into the future and some OS drop python2 but never rectify python point to python3.

Linked PRs

• gh-91818: Add executable detection for CLIs #91819
• gh-91818: Use default program name in the CLI of many modules #124867