TypedDict annotation keys should considered Literals
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- Dominant language
- Python
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Description
Feature
TypedDict.__annotations__.keys(), required_keys and optional_keys should evaluate to Sequence of Literals
Pitch
See https://github.com/python/mypy/issues/16813 for an example why this is useful.
In general working with TypedDicts in for loop this helps a lot reducing duplicate code / keys.
Probably #16820 and #16819 have to be finished before this becomes useful.
Contributor guide
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 reviewing the TypedDict behavior described in the issue, along with the examples in mypy#16813 and the dependencies on #16819 and #16820. Define how annotations.keys(), required_keys, and optional_keys should evaluate as sequences of Literals, then verify the behavior across the referenced TypedDict iteration cases.
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
- 35/100