> I have a question about style. In PEP-8, it says don't exceed 79
> characters, but can this rule ever be trumped by
> readability?
>
> Eg.
>
>
> if someobject.filter(something) \
> .filter(somethingreallyreallyreallyreallylong ==
> somethingelsereallyreallylong) \
> .filter(othethingreallylongreallyreally ==
> ternarythingreallyreallyreallylong) \
> .filter(thirdthingreallylessreallymaybelong ==
> thirdotherthingreallylong) \
> .first():
> < do something >
>
> if someobject.filter(something) \
> .filter(somethingreallyreallyreallyreallylong == \
> somethingelsereallyreallylong) \
> .filter(othethingreallylongreallyreally == \
> ternarythingreallyreallyreallylong ) \
> .filter(thirdthingreallylessreallymaybelong == \
> thirdotherthingreallylong) \
> .first():
> < do something >
>
>
> The first example is more readable to me but violates the 80 character
> rule. The second is less readable, but doesn't violate
> the 80 character rule.
>
> Is there a guideline or convention that pythonistas follow about this
> style case?
It is a guideline, not a rule. Usually your (work) environment or
common sense trumps the guideline.
On a side note, if you wrap that if statement with a parenthesis
you can avoid the error prone '\' at the end of each line
if ( someobject.filter(something)
.filter(somethingreallyreallyreallyreallylong ==
somethingelsereallyreallylong)
.filter(othethingreallylongreallyreally ==
ternarythingreallyreallyreallylong )
.filter(thirdthingreallylessreallymaybelong ==
thirdotherthingreallylong)
.first() ):
< do something >
Ramit
Ramit Prasad | JPMorgan Chase Investment Bank | Currencies Technology
712 Main Street | Houston, TX 77002
work phone: 713 - 216 - 5423
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