Implement PEP 728: TypedDict with Typed Extra Items #137840
Description
Feature or enhancement
Proposal:
PEP-728 was just accepted by the Steering Council, so we get to implement it in CPython!
The implementation can likely be largely copied from typing-extensions.
cc @PIG208.
Has this already been discussed elsewhere?
No response given
Links to previous discussion of this feature:
No response