I sure hope this never happens! It would break millions of working lines
and kill a common useful pattern.
ntrue = sum(this == that for this, that in items)
-100.
On Mon, Dec 21, 2020, 3:00 AM Paul Bryan <pbr...@anode.ca> wrote:
> I know this has come up in the past.
>
> Could the consensus have changed regarding bool's inheritance from int?
>
> This is not intuitive (to me), and recently bit me as a bug:
>
> Python 3.9.1 (default, Dec 13 2020, 11:55:53)
>
> [GCC 10.2.0] on linux
>
> Type "help", "copyright", "credits" or "license" for more information.
>
> >>> {1,True}
>
> {1}
>
>
> I've worked around it by storing tuple(type, value) in the set, which is
> fugly. Yes, I need mixed types in the set, and I'm using the set for
> efficient lookup.
>
> A contrived example I dreamed-up, which I also find non-intuitive:
>
> >>> x = {}
>
> >>> x[True] = 1
>
> >>> x
>
> {True: 1}
>
> >>> x[1] = 1
>
> >>> x
>
> {True: 1}
>
>
> Maybe a wish list item for Python 4.0?
>
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