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Bad 'Incompatible types in assignment' error for a type alias containing Union #2485

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davire opened this issue Nov 24, 2016 · 1 comment
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Bad 'Incompatible types in assignment' error for a type alias containing Union #2485

davire opened this issue Nov 24, 2016 · 1 comment

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@davire
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davire commented Nov 24, 2016

There is this code that doesn't typecheck and I don't understand why:

W = Dict[str, Union[bool,int, float]]


def test2() -> W:
    rest = {}  # type: W
    return rest

However it typechecks if I remove either one of bool, int, float in the type W
@rwbarton
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Indeed, it's a bug. Duplicate of #1850.

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@rwbarton @davire