Generic MRO
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topic: feature
- Dominant language
- Python
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Description
Generic information are lost with classes __mro__. But it could be useful to have it, especially for #776 implementation.
typing module could integrate a generic_mro function in order to retrieve the class MRO annotated with related generic information; this function could also accept a generic alias in argument.
from typing import Generic, TypeVar, generic_mro
T = TypeVar("T")
class A(Generic[T]): ...
U = TypeVar("U")
class B(A[U]): ...
class C(B[int]):
pass
assert generic_mro(C) == (C, B[int], A[int], Generic, object)
assert generic_mro(B) == (B, A[U], Generic, object)
assert generic_mro(B[int]) == (B[int], A[int], Generic, object)
Contributor guide
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reading the proposed generic_mro API and related issue #776; the issue names no implementation files or tests. Done means providing the proposed function and matching the three documented MRO results for C, B, and B[int].
Written by the indexing model from the issue text.
Assessment
- Tech stack
- python
- Domain
- devtools
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 25/100