[BUG] `UnexpandableImportStar` without `expand-stars` or `expand_stars=true`

[Avasam]

Describe the bug A clear and concise description of what the bug is.

There's star imports of C wrapped modules in the codebase. If I tell pycln to not expand stars, it'll still fail.

To Reproduce Steps to reproduce the behavior:

1. Take this code snippet:

    from win32api import *

2. Run this Pycln command:

   $ pycln example.py

3. Error traceback or unexpected output (if present):

   example.py:1:0 UnexpandableImportStar: 'win32api' module not found or it's a C wrapped module! ⛔

Expected behavior:

1. Description: A clear and concise description of what you expected to happen.

pycln shouldn't error on unexpandable star imports if its not going to expand star imports.

Environment (please complete the following informations):

• Python Version: Python 3.9.13
• Pycln Version: pycln, version 2.1.1
• OS Type: Windows 10

[hadialqattan]

Hi,

This behavior is because without using --all flag Pycln tries to analyze star imports in order to know weather they are actually used or not (the --expand-stars flag only makes it refactor that import by keeping only the used names).

Also, you can take that error as a warning; Pycln here is trying to give you a hint that it can't conclude anything regarding that star import (it would be skipped in anyway).

Thanks.

[Avasam]

Makes sense, so even if it's not going to expand, it's still analysing to see if it can remove the import. Maybe the error could be improved ? UnexpandableImportStar error lead me to think it was trying to expand and that the option was broken.

Unfortunately nothing I can do about the use of modules star imports. (not my project + outside the scope of what I'm willing to refactor + some legit module re-exports). But I do take it as a warning.

If side-effects cannot be analysed (or are analyzed as "maybe"), could pycln still remove unused explicit imports?
ie:

from c_module import used, unused
# to
from c_module import used


from c_module import unused
# to
import c_module

(I can turn this into a proper feature request if you tell me it's feasible)

For now I'll # nopycln: import those lines (and/or add the c-modules to the exclude list).

[hadialqattan]

Hi again @Avasam,

Regarding improving the UnexpandableImportStar error, I'll think of it and respond later... The second suggestion sounds good to me and I believe it should've been already implemented! So yes please open a feature request.