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>>> pairs = [("a", 1), ("b", 2), ("c", 3)]
>>> for a, b in pairs:
print a, b
a 1
b 2
c 3
>>>for pair in pairs:
print("First = {}, second = {}".format(pair.first, pair.second))
First = a, second = 1
First = b, second = 2
First = c, second = 3