On Tue, 28 Sep 2010 11:59:08 -0700, geremy condra wrote: > On Tue, Sep 28, 2010 at 11:44 AM, Rog <r...@pynguins.com> wrote: >> Hi all, >> Have been grappling with a list problem for hours... a = [2, 3, 4, >> 5,.....] >> b = [4, 8, 2, 6,.....] >> Basicly I am trying to place a[0], b[0] in a seperate list IF a[2] and >> b[2] is present. >> I have tried sets, zip etc with no success. I am tackling Euler projects >> with Python 3.1, with minimal knowledge, and having to tackle the >> language as I progress. Enjoyable frustration :) > > I'm not clear on what your actual problem is, could you restate it? > > It sounds like you want to copy the ith element out of a and b into some > other list- call it c- when the (i+2)th element meets some condition. > What's the condition? > > Geremy Condra
The condition is that the i-th element is inverted, but not equal. eg 4,2 - 2,4 , 34,5 - 5,34 etc. Hope that is clearer. Thanks for the response. -- Rog http://www.rog.pynguins.com -- http://mail.python.org/mailman/listinfo/python-list
