No way to have individual type variable substitutions in uniform tuples of parametrized types
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- Dominant language
- Python
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Description
Suppose we have:
T = TypeVar('T')
Element = tuple[T]
def fn(elements: tuple[Element, ...]): ...
The problem is that T is forced to be the same for every element, i.e. tuple[tuple[int], tuple[int]] will match, while tuple[tuple[float], tuple[int]] won't. Is there currently any support for this? If not, this would be a worthwhile feature - this would be a big help to get type checking and annotations in ctypes :)
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Research direction
The issue provides no repository file, test, or implementation entry point. Start with the TypeVar/Element example and determine the current behavior for tuple[Element, ...]; a complete contribution would first need an agreed specification, then corresponding implementation and tests.
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Assessment
- Tech stack
- python
- Domain
- tooling
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100