argparse: make `suggest_on_error` a keyword-only parameter

[hugovk]

Feature or enhancement

Proposal:

argparse.ArgumentParser() has a lot of parameters, suggest_on_error (added in 3.14) was its 15th.

https://docs.python.org/3.14/library/argparse.html#argparse.ArgumentParser

Many argparse CLIs I see already use keywords for most parameters, but I think we should make these new ones keyword-only, especially for new bools, as a long list of (..., True, False, True, ...) is best avoided.

Parameter number 16 color (added in 3.14) is keyword-only. I suggest we make suggest_on_error keyword-only as well.

Has this already been discussed elsewhere?

This is a minor feature, which does not need previous discussion elsewhere

Links to previous discussion of this feature:

No response

Linked PRs

• gh-133300: argparse: make suggest_on_error a keyword-only parameter #133302