[Tutor] Pythonese/Efficiency/Generalese critique please

[Lee Cullens]

Well, I've tried both and can't produce what I was doing with the for  
construct.
With a list    pl = ['a', 'b', 'c', 'd'] of the path components I'm  
trying to add justified non repeated path elements, say pl[2] and pl 
[3] to csvline so that csvline would end up '"",'*x plus '"c","d",'

 >>> pl = ['a', 'b', 'c']
 >>> csvl = '"",'
 >>> csvl += '"'.join(pl[0:2]) + '",'
 >>> csvl
'"",a"b",'

which is intended to be '"","a","b",'

Saving one line of code in this module doesn't mean much,  but if it  
were a efficiency in processing it would?

Lee C


On Jun 4, 2005, at 6:55 PM, Kent Johnson wrote:

> Javier Ruere wrote:
>
>> for i in range(alvl, clvl):
>>      csvline = csvline + '"' + pl[i] + '",'
>>
>> should be replaced by something like the following:
>>
>> cvsline += '"' + pl[alvl:clvl].join('",')
>>
>
> or maybe more like this:
> cvsline += '"' + '",'.join(pl[alvl:clvl]) + '",'
>
> though if alvl == clvl this will output an empty cell.
>
> Kent
>
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