python create type for heterogeneous dict

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1from typing_extensions import TypedDict
2class Point2D(TypedDict):
3    x: int
4    y: int
5    label: str
6
7a: Point2D = {'x': 1, 'y': 2, 'label': 'good'}  # OK
8b: Point2D = {'z': 3, 'label': 'bad'}           # Fails type check
9
10assert Point2D(x=1, y=2, label='first') == dict(x=1, y=2, label='first')

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