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Star-star syntax not allowed with TypedDict #9408
Description
🐛 Bug Report
This is similar to #6462 and #9335 but with the star-star syntax.
There are cases where mypy could prove the following program type-safe, but currently this is never allowed:
To Reproduce
from typing import TypedDict
class Value(TypedDict):
key1: str
key2: str
const1: Value = {"key1": "foo", "key2": "bar"}
const2: Value = {**const1, "key2": "eggs"}
# ^^^^^^^^
# mypy: Expected TypedDict key to be string literal (10:20)- Mypy version used: mypy 0.780
- Python version used: 3.8.6
Reacted by Yuri Pereira Constante, Lachlan Stuart, Jay Stringer, Dominic , Edaqa Mortoray, Greg Werbin, Serhii Khalymon, Scott Ernst, Erik Eloff, Eric Wolf and 20 more
Activity
AlexWaygood commentedon May 3, 2022
I'm raising the priority of this issue, since it has been requested many times and there have been at least three duplicate issues.
eflorico commentedon Aug 7, 2022
I've just given this issue a go in my pull request: #13353
Add variables for combined language item ID and code
Support flexible TypedDict creation/update (#15425)