[Python-Dev] For review: PEP 285: Adding a bool type

M.-A. Lemburg mal@lemburg.com
Fri, 08 Mar 2002 20:36:07 +0100


Just found another argument:

Guido van Rossum wrote:
> 
> When showing people comparison operators etc. in the interactive
> shell, I think this is a tad ugly:
> 
>     >>> a = 13
>     >>> b = 12
>     >>> a > b
>     1
>     >>>
> 
> If this was:
> 
>     >>> a > b
>     True
>     >>>
> 
> it would require one millisecond less thinking.

and then they do:

>>> (a > b) * 10
10

or

>>> True * 10
10
>>> False * 10
0

If you want to dive into logic here, the only correct output
would be:

>>> True * 10
True
>>> False * 10
False

However, this would break even more code... your bool
type is much more like a bit type (or would have to behave
like one in order to maintain backwards compatibility).

-- 
Marc-Andre Lemburg
CEO eGenix.com Software GmbH
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