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

从 Lib/cmd.py#L346 中的 print_topics 定义、Cmd 文档及其 typeshed 声明开始。在决定预期的公共行为之前，审阅链接的 PR gh-134539 以及关于 cmdlen、命名和类型标注的未解决问题。完成意味着已记录约定的行为和参数用法，并在需要时处理 typeshed 注解。