ENH: Replace the module-level __getattr__ with explicit type annotations #17367

[junjunjunk]

Closes #17367 .
Replace the __getattr__ with explicit type annotations in __init__.pyi .

• Remove the module-level __getattr__() function from __init__.pyi.
• Add all objects described in Big list of functions in the top-level namespace missing types #16546 and annotate them as typing.Any.

[BvB93]

Looking good overall!
Could you also add a test to .../fail/modules.py to verify that getting a non-existent objects indeed results in an error?
The pre-existing test case in aforementioned module should serve as an example.

[junjunjunk]

Implemented tests refer to the pre-existing test case which you've told me.
I'm not sure it's correct.Please review.

[junjunjunk]

python runtests.py --coverage is failed by adding test in CI & my environment (macOS).
The error log shows as below in CI.

AssertionError: Extra error "Module has no attribute" assert 4 in defaultdict(<function test_fail.<locals>.<lambda> at 0x00000233F488F678>, {3: 'C:\hostedtoolcache\windows\Python\3...7.9\x64\lib\site-packages\numpy\typing\tests\data\fail\modules.py:281: error: Module has no attribute "sys"'})

I cannot identify the cause.

[mattip]

Thanks @junjunjunk

[junjunjunk]

Thanks! @BvB93