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ambv
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Mar 18, 2017
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| class StatisticsError(ValueError): ... | ||
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| def mean(data: Iterable[_Number]) -> _Number: ... |
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A mean of ints returns a float.
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Hm yes. I wonder if we could just drop int from the typevar and rely on automatic int-to-float promotion.
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Yes, I think that should work. It would lie slightly in that something like statistics.median([1, 2, 3]) will in fact return int but mypy would infer it to return float, but that seems harmless.
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In fact, median for ints returns a float if the number of elements is even. So I think we're good :)
ambv
reviewed
Mar 18, 2017
stdlib/3.4/statistics.pyi
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| from decimal import Decimal | ||
| from fractions import Fraction | ||
| from typing import Iterable, TypeVar |
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https://docs.python.org/3/library/statistics.html