Change TypedDict fallback to Mapping[str, object]
#5933
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The previous fallback mapping item type was join of the value types, which is unsafe because of structural subtyping. Fixes #5927.
ilevkivskyi
reviewed
Nov 21, 2018
| a: A | ||
| b: B | ||
| fun(a) | ||
| fun(b) # Error | ||
| fun(b) |
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I would keep a test that a function that expects a protocol with __getitem__ -> int always fails.
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The previous fallback mapping item type was join of the value
types, which is unsafe because of structural subtyping.
Fixes #5927.