Combinatoric Generators

• product(iterable, q, ... [repeat=1]) --> cartesian product e.g. product(A, B) returns the same as: (x,y) for x in A for y in B)
• permutations(iterable[, r]) Return successive r-length permutations of elements in the iterable. permutations(range(3), 2) --> (0,1), (0,2), (1,0), (1,2), (2,0), (2,1)
• combinations(iterable, r) Return successive r-length combinations of elements in the iterable. combinations(range(4), 3) --> (0,1,2), (0,1,3), (0,2,3), (1,2,3)
• combinations_with_replacement(iterable, r) like combinations but with replacements