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Add stubs for django-environ #14573

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EmCeeEs
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@EmCeeEs EmCeeEs commented Aug 13, 2025

Types for django-environ.

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@donBarbos
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Thanks! I just want to note that the project doesn’t seem to be very actively maintained (the last commit was 7 months ago), so I wouldn’t expect type hints to be added to the library itself anytime soon.

FTR: here’s a recent issue essentially complaining about the lack of type hints: joke2k/django-environ#567, and another one joke2k/django-environ#365 that might give some insight into the maintainer’s stance on adding them.

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Looks good! Just few moments:

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Thanks! Looks good overall, see remarks below

@brianschubert brianschubert changed the title Feature/django environ types Add stubs for django-environ Aug 13, 2025

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According to mypy_primer, this change has no effect on the checked open source code. 🤖🎉

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I noticed that you’ve added quite a few Any types in generics. Just a gentle reminder that the use of Any is usually accompanied by a short comment explaining why it’s needed. If you’re not entirely sure about the type yet, you might consider using Incomplete instead. It could be a more suitable choice in such cases.

@@ -0,0 +1,3 @@
version = "0.12.*"
upstream_repository = "https://github.com/joke2k/django-environ"
requires = ["django-stubs"]
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@donBarbos @brianschubert Any idea on how to fix the stub_uploader test which fails after adding the django-stubs requirement? If I am not mistaken it checks whether the original package requires django, which it doesn't (could be used without).

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I think we could pay attention to how this is done in other stubs for "django" packages, like django-filter METADATA.toml or django-import-export METADATA.toml

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Ah, yeah that could be a problem. I think you'll need to rollback the ImproperlyConfigured change and avoid any other django imports in the stubs. You can just add a note that ImproperlyConfigured re-exports the django exception when available

Comment on lines 180 to 182
def __call__(
self, var: _str, cast: type[_dict], default: _dict[_str, _str] | NoValue = ..., parse_default: _bool = False
self, var: _str, cast: type[_dict[Any, Any]], default: _dict[_str, _str] | NoValue = ..., parse_default: _bool = False
) -> _dict[_str, _str]: ...
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I noticed that you’ve added quite a few Any types in generics. Just a gentle reminder that the use of Any is usually accompanied by a short comment explaining why it’s needed. If you’re not entirely sure about the type yet, you might consider using Incomplete instead. It could be a more suitable choice in such cases.

@donBarbos You are right. However, what I need is type[dict] of the builtin function. I think it's awkward, but pyright requires type arguments in that case. So I added the Any. Not sure if comments or replace with Incomplete makes more sense here.

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@donBarbos donBarbos Aug 19, 2025

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If you can't specify types just leave Incomplete, this is a good case.
Anyway in the future it could be improved (type Any is not very suitable as a placeholder)

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3 participants