Proposed PEP for a Conditional Expression

maxm maxm at normik.dk
Fri Sep 14 16:29:38 CEST 2001


> In Python, one can use the following instead in this case:
>
>   outputString = otherString or ""
>
> Personally, I find complicated uses of ?: difficult to scan and
> understand rapidly, contrary to spurious arguments about its supposed
> similarity to English language constructs.

Besides ... what could be simpler than using the fact that booleans in
Python is either 1 or 0:

#################################
>>> a=3
>>> b=4
>>> print ('number two', 'number one')[a < b]
>>> number one

or if you want to get the result of a functionwith only the choosen function
evaluated:

#################################
>>> def n1():
>>>     return 'Number one'
>>> def n2():
>>>     return 'Number two'
>>> print (n2, n1)[a < b]()
>>> Number one

Any sane Python programmer will grasp those IMMEDIATELY!

;-)

Regards Max M





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