Wow, thanks everyone. Very helpful indeed! On Tuesday, July 23, 2013 2:52:21 PM UTC-7, st...@divillo.com wrote: > I think that itertools may be able to do what I want but I have not been able > to figure out how. > > > > I want to convert an arbitrary number of lists with an arbitrary number of > elements in each list into a single list as follows. > > > > Say I have three lists: > > > > [[A0,A1,A2], [B0,B1,B2] [C0,C1,C2]] > > > > I would like to convert those to a single list that looks like this: > > > > [A0,B0,C0,C1,C2,B1,C0,C1,C2,B2,C0,C1,C2,A1,B0,C0,C1,C2,B1,C0,C1,C2,B2,C0,C1,C2,A2,B0,C0,C1,C2,B1,C0,C1,C2,B2,C0,C1,C2] > > > > An easier way to visualize the pattern I want is as a tree. > > > > A0 > > B0 > > C0 > > C1 > > C2 > > B1 > > C0 > > C1 > > C2 > > B2 > > C0 > > C1 > > C2 > > A1 > > B0 > > C0 > > C1 > > C2 > > B1 > > C0 > > C1 > > C2 > > B2 > > C0 > > C1 > > C2 > > A2 > > B0 > > C0 > > C1 > > C2 > > B1 > > C0 > > C1 > > C2 > > B2 > > C0 > > C1 > > C2
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