map returning tuples

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examples/functional/map_lambda_tuples.py

numbers = [1, 2, 3, 4]

pairs = map(lambda n: (n, 2*n), numbers)
print(pairs)

for pair in pairs:
    print(pair)

<map object at 0x7fcd264a15f8>
(1, 2)
(2, 4)
(3, 6)
(4, 8)