PEP 308: Erik's alternatives list
Roman Suzi
rnd at onego.ru
Wed Feb 19 11:29:16 EST 2003
On Wed, 19 Feb 2003, Gerald S. Williams wrote:
> "Erik Max Francis" <max at alcyone.com> wrote:
> > I. Proposals mentioned in the PEP at some point
> [ ...]
> > 3. if C: x else: y
I do like
iif(C, :x, :y)
better in the light of PEP 312 ;-)
> I'm starting to really like this one. Basically it's
> just interpreting the if/else statement slightly
> differently when used in an expression context,
> returning the value of the alternative. It gets
> its short-circuiting from the normal semantics
> of the if statement. Short-circuited expressions
> follow ":", just like short-cirtuited statements
> do.
>
> Think of it this way: "if" is the embodiment of
> two-option short-circuiting.
>
> This would generalize nicely to switch/case if
> that construct ever makes it into Python.
>
> -Jerry
>
> P.S.
>
> I still think the current FAQ should show an
> alternative that is readable and doesn't need
> disclaimers. The following works for me:
>
> def ifelse(x): return x[0]
> ... ifelse(c and [a] or [b])
>
>
>
Sincerely yours, Roman A.Suzi
--
- Petrozavodsk - Karelia - Russia - mailto:rnd at onego.ru -
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