cattrs

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• cattrs version: 22.1.0
• Python version: 3.9.13
• Operating System: macOS 12.5

Description

I know cattrs does not currently support TypedDict. Is this something that would make sense as a new feature?

I want to convert an input dict into an output dict, ideally with a structure defined as a TypedDict. Each value in the input dict should be converted to the correspondent type in the TypedDict definition. The problem was described in https://stackoverflow.com/q/65196658/2654518.

What I Did

from typing import TypedDict

import cattrs


class Test(TypedDict):
    value: int


cattrs.structure({'value': '42', 'foo': 'bar'}, Test)

With TypedDict support, the output would be {'value': 42}, instead of {'value': '42', 'foo': 'bar'}.

We don't support it currently, but we definitely should. Just haven't gotten around to it.

This is in PR now (#364), very close.

Fixed on main.