Make module suggestion avaliable on built-in modules

[Locked-chess-official]

Feature or enhancement

Proposal:

Add BuiltinImporter.discover to make it:

class BuiltinImporter:
    @staticmethod
    def discover(spec=None):
        if spec is not None: # assume that built-in modules have no submodule
            return
        yield from sys.builtin_module_names

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-146401: suggest a module in sys.builtin_module_names #146421

[picnixz]

Please explain what you want to do and why it should be done. The description doesn't explain anything. If it's about the REPL, please show why the current behavior doesn't work.

[Locked-chess-official]

Now the suggestion for modules can only suggest the file modules. In fact, the suggestion must contains the built-in modules. It because that now BuiltinsImporter has no discover and PathFinder cannot find any built-in modules:

After the changing, it works and reduce some greenhand running pip install itertool:

[picnixz]

Why not just extending the list of known modules with sys.builtin_module_names at the REPL level? we don't need to change importer

[Locked-chess-official]

This suggesting doesn't need to just be limited in repl. Now I will change to just change traceback.py.

[picnixz]

Yes sorry, I meant traceback.py

[picnixz]

@Locked-chess-official I will reopen your PR so no need to open a new one.