[Python-ideas] itertools.chunks()

[Carlo Pires]

+1

Very useful function.


2013/4/6 Giampaolo Rodolà <g.rodola at gmail.com>

> def chunks(total, step):
>     assert total >= step
>     while total > step:
>         yield step;
>         total -= step;
>     if total:
>         yield total
>
> >>> chunks(12, 4)
> [4, 4, 4]
> >>> chunks(13, 4)
> [4, 4, 4, 1]
>
>
> I'm not sure how appropriate "chunks" is as a name for such a function.
> Anyway, I wrote that because in a unit test I had to create a file of
> a precise size, like this:
>
> FILESIZE = (10 * 1024 * 1024) + 423  # 10MB and 423 bytes
> with open(TESTFN, 'wb') as f:
>      for csize in chunks(FILESIZE, 262144):
>          f.write(b'x' * csize)
>
> Now I wonder, would it make sense to have something like this into
> itertools module?
>
>
> --- Giampaolo
> https://code.google.com/p/pyftpdlib/
> https://code.google.com/p/psutil/
> https://code.google.com/p/pysendfile/
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-- 
  Carlo Pires
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