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gists/Array combinations

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def array_combinations(*args):
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combinations = [[i] for i in set(args[0])]
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for arg in args[1:]:
tempcomb = []
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for i in set(arg):
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tempcomb += [c+[i] for c in combinations if i not in c ]
combinations = tempcomb
return combinations
res = array_combinations(a,b,c)
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print res
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print len(res)