FW: [Python-Dev] conditional expressions?

Carel Fellinger cfelling at iae.nl
Tue Oct 16 06:27:32 CEST 2001


Paul Rubin <phr-n2001d at nightsong.com> wrote:
> m.faassen at vet.uu.nl (Martijn Faassen) writes:
>>   * list comprehensions are signalled by the fairly clear [ and ]. 
>>     Conditional expressions use the already fairly strongly 
>>     overloaded ( and ). Of course I guess they wouldn't really 
>>     overload them further, but.. 

> A conditional expression analogy to list comprehensions would be
>   x = (a if b else c)

though I think I like this spelling more, you mixed up a and b, and
that's probably a likely mistake, so a big disadvantage.  On the other
hand this clearly looks like an expression to me, a big advantage.

> rather than
>   x = if a then b else c

I've only once been exposed to Algol-60, to short to get familiar with
the use of a conditional statement disguised as an if *statement* but
I sure would like parens to be required in far more situations then
the current patch as it helps me to read it as an expression at a
glance.  I think about the only place were I feel the extra parens
don't help is in a simple parameter list.
-- 
groetjes, carel



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