Undocumented Cmd method print_topics

Documentation

When exploring the Cmd Python library, I realized that there is no documentation for print_topics method.

I only realized the missing documentation because I noticed that print_topics method has an unused parameter called cmdlen, and I couldn't figure out if it is actually useful for something.
I could also notice that on typeshed it is typed as Any, even though it seems to be only used as an int.

Extra doubts:

Maybe print_topics should be renamed to _print_topics or we should document how to use it properly?
Also, is that cmdlen parameter really needed?

I am willing to contribute with that, but I don't know which type of issue I should open to report an unused param.

Links:

• Cmd documentation: https://docs.python.org/3.13/library/cmd.html
• Cdm.print_topics definition: https://github.com/python/cpython/blob/main/Lib/cmd.py#L346
• typeshed: https://github.com/python/typeshed/blob/main/stdlib/cmd.pyi#L45

Linked PRs

• gh-134539

Start with the print_topics definition at Lib/cmd.py#L346, the Cmd documentation, and its typeshed declaration. Review linked PR gh-134539 and the unresolved questions about cmdlen, naming, and typing before deciding the intended public behavior. Done means the agreed behavior and parameter usage are documented, with the typeshed annotation addressed if needed.