Python bitwise OR (?) operator | used in function argument type hints [duplicate]

Question

I came across function with signature like this:

def get_quantile(numbers: List[float], q: float | int ) -> float | int | None :

What does it mean?

It's a syntax error on my python 3.8. Do I need to import something from future to make it work?

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asked Oct 30, 2020 at 21:25

1

khelwood 59.9k14 gold badges91 silver badges116 bronze badges · Accepted Answer

According to PEP 604, | will be used to designate union types from Python 3.10.

So float | int will mean Union[float, int], i.e. a float or an int.

answered Oct 30, 2020 at 21:30

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