# Define a procedure, union, # that takes as inputs two lists. # It should modify the first input # list to be the set union of the two # lists. You may assume the first list # is a set, that is, it contains no # repeated elements. def union(a,b): for e in b: if e not in a: a.append(e) # To test, uncomment all lines # below except those beginning with >>>. a = [1,2,3] b = [2,4,6] union(a,b) print a #>>> [1,2,3,4,6] print b #>>> [2,4,6]
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