Peter Otten wrote:
> Kelie wrote:
>
>> Hello,
>>
>> This function does I what I want. But I'm wondering if there is an
>> easier/better way. To be honest, I don't have a good understanding of
>> what "pythonic" means yet.
>>
>> def divide_list(lst, n):
>> """Divide a list into a number of lists, each with n items. Extra
>> items are
>> ignored, if any."""
>> cnt = len(lst) / n
>> rv = [[None for i in range(n)] for i in range(cnt)]
>> for i in range(cnt):
>> for j in range(n):
>> rv[i][j] = lst[i * n + j]
>> return rv
>
> You can use slicing:
>
>>>> def chunks(items, n):
> ... return [items[start:start+n] for n in range(0, len(items)-n+1, n)]
> ...
>>>> for i in range(1,10):
> ... print chunks(range(5), i)
> ...
> [[0], [1], [2], [3], [4]]
> [[0, 1], [2, 3]]
> [[0, 1, 2]]
> [[0, 1, 2, 3]]
> [[0, 1, 2, 3, 4]]
> []
> []
> []
> []
This won't work(e.g. you don't define "start", you change the value of n
through the loop). I guess you meant :
def chunks(items, n) :
return [items[i:i+n] for i in range(0, len(items)-n+1, n)]
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