[Python-ideas] ternary without else

[Antoine Rozo]

> if not article["art_wt"]: article["art_wt"] = 0
> if not article["px_pchs"]: article["px_pchs"] = 0
> if not article["px_calc"]: article["px_calc"] = 0
> if not article["px_sell"]: article["px_sell"] = 0

I think what you need is the setdefault method of dictionnaries, instead of
a new syntax construct.

2018-05-26 1:52 GMT+02:00 Carl Smith <carl.input at gmail.com>:

> ​You cannot have `expression if expression` in a language that also
> supports
> `expression if expression else expression` (like Python).​ Otherwise, you
> have
> the dangling else problem:
>
> https://en.wikipedia.org/wiki/Dangling_else
>
> -- Carl Smith
> carl.input at gmail.com
>
> On 25 May 2018 at 15:21, Rob Cliffe via Python-ideas <
> python-ideas at python.org> wrote:
>
>>
>>
>> On 25/05/2018 12:38, Steven D'Aprano wrote:
>>
>>>
>>> PEP 8 is not holy writ. Ignore it when your code is better for ignoring
>>> it.
>>>
>>>
>>> +1.  Not infrequently I judge that my code is easier both to read and to
>> maintain with more than 1 (short) statement on a line,
>> often when it allows similar items to be aligned vertically.  A
>> spur-of-the moment, totally invented example:
>>     if MON <= day <= FRI:    Rate = Normal
>>     if day==SAT:                     Rate = DoubleTime
>>     if day==SUN:                    Rate = TripleTime
>> I also feel no inhibitions about using Jacco's original example:
>>     if cond: do_something
>> Rob Cliffe
>>
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>
>
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-- 
Antoine Rozo
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