[Python-ideas] True and False are singletons

Oleg Broytman phd at phdru.name
Mon Mar 18 08:08:22 EDT 2019

On Tue, Mar 19, 2019 at 12:27:04AM +1300, Greg Ewing <greg.ewing at canterbury.ac.nz> wrote:
> Juancarlo A?ez wrote:
> >    if settings[MY_KEY] is True:
> >        ...
> If I saw code like this, it would take a really good argument to
> convince me that it shouldn't be just
>     if settings[MY_KEY]:
>         ...

   Three-way (tri state) checkbox. You have to distinguish False and
None if the possible valuse are None, False and True.

> -- 
> Greg

    Oleg Broytman            https://phdru.name/            phd at phdru.name
           Programmers don't die, they just GOSUB without RETURN.

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