Steven, Thanks for the info of itertools. It is a great start for me. Overall, I agree with you that it is really the user data needs to be sorted out. However, novice users may need help on certain patterns such as "a=[1,[2,3],4], b=[5,[6,7,8],9,10]". We could just draw our line saying that similarly nested inputs could be adjusted even though the members aren't exactly on one-to-one mapping and we won't getting any deeper for complicated cases such as "a = [1, 2, [3, 4]]; b = [1, [2, [3,4]], [4,5], 6]".
> enhanced_map([1, [2,3, [4,5], 6], 7], [8, [7,6, [5,4], 3], 2]) > should be the same as > map([1, 2, 3, 4, 5, 6, 7], [8, 7, 6, 5, 4, 3, 2]) I don't expect the drop. The original nested structure is very important. > What do you expect to happen if the sub-sequences don't match up exactly? > E.g. a = [1, 2, [3, 4]]; b = [1, [2, 3], 4] > > What do you expect to happen if the shorter list is empty? > E.g. a = [1, 2, [3, 4], 5]; b = [1, 2, [], 3] There are modes called "shortest" and "longest" (and "AllCombination"/"Cross" which is more complex). For case a = [1, 2, [3, 4],4]; b = [1, [2, 3], 4,5] shortest: a will be adjusted to [1, [3, 4],4] b will be adjusted to [1, [2, 3],4] longest: a will be adjusted to [1, 2,[3, 4],4,4] b will be adjusted to [1, 1,[2, 3],4,5] As I said previously, the enhance_map function will only handle limited "unmatch" cases and the line will need to be drawn carefully. Thanks -Patrick. -- http://mail.python.org/mailman/listinfo/python-list
