• filter()
    • map()
    • reduce()
    • zip()
    1. from functools import reduce
    3. a = [1, 2, 3, 4, 5]
    5. # filter
    6. b = list(filter(lambda x: x > 2, a))
    7. print('b:', b)
    9. # map
    10. c = list(map(lambda x: x + 1, a))
    11. print('c:', c)
    13. # reduce
    14. d = reduce(lambda x, y: x+y, [2, 3, 4], 1)
    15. print('d:', d)  # 1 + 2 + 3 + 4 = 10
    17. # zip, 合成
    18. for i in zip((1, 2, 3), (4, 5, 6)):
    19.     print('i:', i)
    21. # zip, 调换
    22. dicta = {'a': 'aa', 'b': 'bb'}
    23. dictb = dict(zip(dicta.values(), dicta.keys()))
    24. print('dictb:', dictb)