How to iterate through a sequence, grabbing subsequences?

George Sakkis george.sakkis at
Fri Sep 29 17:00:28 CEST 2006

Matthew Wilson wrote:

> I wrote a function that I suspect may already exist as a python builtin,
> but I can't find it:
> def chunkify(s, chunksize):
>     "Yield sequence s in chunks of size chunksize."
>     for i in range(0, len(s), chunksize):
>         yield s[i:i+chunksize]
> I wrote this because I need to take a string of a really, really long
> length and process 4000 bytes at a time.
> Is there a better solution?

There's not any builtin for this, but the same topic came up just three
days ago: 


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