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To: python-list@python.org
From: Emile van Sebille <emile@fenx.com>
Subject: Re: looking for a neat solution to a nested loop problem
Date: Mon, 06 Aug 2012 11:11:11 -0700
References: <a8a7hvF8crU1@mid.individual.net> <pan.2012.08.06.16.18.08.86000@nowhere.com> <a8acciFcukU1@mid.individual.net>
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Xref: csiph.com comp.lang.python:26643

On 8/6/2012 10:14 AM Tom P said...
> On 08/06/2012 06:18 PM, Nobody wrote:
>> On Mon, 06 Aug 2012 17:52:31 +0200, Tom P wrote:
>>
>>> consider a nested loop algorithm -
>>>
>>> for i in range(100):
>>>       for j in range(100):
>>>           do_something(i,j)
>>>
>>> Now, suppose I don't want to use i = 0 and j = 0 as initial values, but
>>> some other values i = N and j = M, and I want to iterate through all
>>> 10,000 values in sequence - is there a neat python-like way to this?
>>
>>     for i in range(N,N+100):
>>         for j in range(M,M+100):
>>             do_something(i,j)
>>
>> Or did you mean something else?
>
> no, I meant something else ..
>
>    j runs through range(M, 100) and then range(0,M), and i runs through
> range(N,100) and then range(0,N)
>
> .. apologies if I didn't make that clear enough.
>

      for i in range(N,N+100):
          for j in range(M,M+100):
              do_something(i % 100 ,j % 100)

Emile