Mypy: Is there a way to represent an empty tuple type?

Created on 6 Nov 2017  路  4Comments  路  Source: python/mypy

logging.handlers.SMTPHandler arg secure accepts something like this:

Union[EmptyTuple, Tuple[str], Tuple[str, str]]

Is there a way to define the EmptyTuple part?

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picture leandropls

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Should be Tuple[()]

picture elazarg on 6 Nov 2017
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Should be Tuple[()]

elazarg picture elazarg on 6 Nov 2017
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@elazarg thanks!

leandropls picture leandropls on 6 Nov 2017

I did not find any documentation of this, so it would be nice to add that.

ethanhs picture ethanhs on 6 Nov 2017

True, the only mention of Tuple[()] is in PEP 484.

gvanrossum picture gvanrossum on 7 Nov 2017
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