complementary lists?

Ross ross.jett at gmail.com
Wed Apr 29 05:41:21 CEST 2009


If I have a list x = [1,2,3,4,5,6,7,8,9] and another list that is a
subset of x:  y = [1,4,7] , is there a quick way that I could return
the complementary subset to y.... z=[2,3,5,6,8,9] ?

The reason I ask is because I have a generator function that generates
a list of tuples and I would like to divide this list into
complementary lists.



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