[Numpy-discussion] Should bool_ subclass int?

Charles R Harris charlesr.harris@gmail....
Tue Jul 10 11:53:22 CDT 2007


On 7/10/07, Timothy Hochberg <tim.hochberg@ieee.org> wrote:
>
>
> [CHOP: lots of examples]
>
> It looks like bool_s could use some general rejiggering. Let me put forth
> a concrete proposal that's based on matching bool_ behaviour to that of
> Python's bools. There is another route that could be taken where bool_ and
> bool are completely decoupled, but I'll skip over that for now since I don't
> really think it's a good idea.
>
>    1. +,- are arithmetic operators and return ints not booleans
>    2. *,** are arithmetic operators on scalars and arrays and return
>    ints as above.
>    3. &,|,^ are the logical operators and return booleans.
>    4. *,** are defined on matrices to perform logical matrix
>    multiplication and exponation.
>
> This seems like the simplest route towards something that is both
> internally self consistent and consistent with Python.


Looks good to me. At least it would make things consistent with bool_ being
a subclass of integers if we go that way.

Chuck
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