Hi everyone, I submitted PEP 589 (TypedDict: Type Hints for Dictionaries with a Fixed Set of Keys) for discussion to typing-sig [1].
Here's an excerpt from the abstract of the PEP: PEP 484 defines the type Dict[K, V] for uniform dictionaries, where each value has the same type, and arbitrary key values are supported. It doesn't properly support the common pattern where the type of a dictionary value depends on the string value of the key. This PEP proposes a type constructor typing.TypedDict to support the use case where a dictionary object has a specific set of string keys, each with a value of a specific type. Jukka Lehtosalo [1] https://mail.python.org/mailman3/lists/typing-sig.python.org/
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