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is there a way to prevent or alert in case a member is imported from within a module? (feddit.cl)

submitted 11 months ago* (last edited 11 months ago) by [email protected] to c/[email protected]

13 comments fedilink hide all child comments

Let's say I have the following structure:

my_module/
  __init__.py
  utilities.py

and __init__.py contains

from .utilities import SomeUtilityFunction

Is there a way to prevent or alert developers when they do

from my_module.utilities import SomeUtilityFunction

instead of

from my_module import SomeUtilityFunction

The problem arose when a few modules started using a function that was imported inside a module in which it wasn't used, while also being available on the module's __init__.py, so after linting the file and removing the unused import my tests started failing.

any other advice for situations like this?

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[–] [email protected] 2 points 11 months ago* (last edited 11 months ago) (1 children)

You could guard it.
__init__.py:

_GUARD_SOME_UTILITY_FUNCTION = True
from .utilities import SomeUtilityFunction

utilities.py:

def SomeUtilityFunction():
    if not _GUARD_SOME_UTILITY_FUNCTION:
        raise SomeException("Helpful error message")

Take this with a grain of salt, as I'm typing this on my phone and haven't actually tried it.

Alternatively there's the import-guard package on PyPI. No idea if it's any good, though. Just something a quick search brought up.

Edit:
Ok, I tried my suggestion and it doesn't work.

[–] [email protected] 1 points 11 months ago* (last edited 11 months ago) (1 children)

This approach seems quite overkomplex. Instead of having these errors on runtime, stuff like this should sit in linter rules of any kind.

[–] [email protected] 1 points 11 months ago

It's only useful during development there.