字典推导式 mcase = {'a': 10, 'b': 34} mcase_frequency = {v: k for k, v in mcase.items()} print mcase_frequency # Output: {10: 'a', 34: 'b'}
列表推导式
multiples = [i for i in range(30) if i % 3 is 0] print(multiples) # Output: [0, 3, 6, 9, 12, 15, 18, 21, 24, 27]