data = [(0, 1), (2, 3), (4, 5), (6, 7), (8, 9), (10, 11), (12, 13), (14, 15
    ), (16, 17), (18, 19)]
combos = random_combinations(data, 3, 20)
for i, item in enumerate(combos, 1):
    pass
Python limited combination