[Python-ideas] itertools.chunks(iterable, size, fill=None)

[Miki Tebeka]

See the "grouper" example in http://docs.python.org/library/itertools.html

On Friday, August 31, 2012 11:28:33 PM UTC-7, anatoly techtonik wrote:
>
> I've run into the necessity of implementing chunks() again. Here is 
> the code I've made from scratch. 
>
> def chunks(seq, size): 
>   '''Cut sequence into chunks of given size. If `seq` length is 
>      not divisible by `size` without reminder, last chunk will 
>      have length less than size. 
>
>      >>> list( chunks([1,2,3,4,5,6,7], 3) ) 
>      [[1, 2, 3], [4, 5, 6], [7]] 
>   ''' 
>   endlen = len(seq)//size 
>   for i in range(endlen): 
>     yield [seq[i*size+n] for n in range(size)] 
>   if len(seq) % size: 
>     yield seq[endlen*size:] 
>
> -- 
> anatoly t. 
>
>
> On Fri, Jun 29, 2012 at 11:32 PM, Georg Brandl <g.br... at gmx.net<javascript:>> 
> wrote: 
> > On 26.06.2012 10:03, anatoly techtonik wrote: 
> >> 
> >> Now that Python 3 is all about iterators (which is a user killer 
> >> feature for Python according to StackOverflow - 
> >> http://stackoverflow.com/questions/tagged/python) would it be nice to 
> >> introduce more first class functions to work with them? One function 
> >> to be exact to split string into chunks. 
> >> 
> >>      itertools.chunks(iterable, size, fill=None) 
> >> 
> >> Which is the 33th most voted Python question on SO - 
> >> 
> >> 
> http://stackoverflow.com/questions/312443/how-do-you-split-a-list-into-evenly-sized-chunks-in-python/312464 
> >> 
> >> P.S. CC'ing to python-dev@ to notify about the thread in python-ideas. 
> >> 
> > 
> > Anatoly, so far there were no negative votes -- would you care to go 
> > another step and propose a patch? 
> > 
> > 
> > Georg 
> > 
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