3. # -*- coding: utf-8 -*-
    4. __author__ = 'dongfangyao'
    5. __date__ = '2017/12/18 下午9:47'
    6. __product__ = 'PyCharm'
    7. __filename__ = 'lambda1'
    10. # result = []
    11. # for i in range(8):
    12. #     result.append(i**2)
    13. #
    14. # print(result)
    16. print([i**2 for i in range(8)])
    18. print([i for i in range(9) if i% 2==0])
    20. a = [[1, 2, 3], [44, 55, 66], [77, 88, 99]]
    21. print([j for i in a for j in i])
    25. # -*- coding: utf-8 -*-
    26. from functools import reduce
    27. __author__ = 'dongfangyao'
    28. __date__ = '2017/12/18 下午9:54'
    29. __product__ = 'PyCharm'
    30. __filename__ = 'lambda2'
    32. lambda1 = lambda x: x**2
    33. lambda2 = lambda x, y: x+y
    34. lambda3 = lambda x: x % 2 == 0
    36. # python map reduce filter
    38. print(list(map(lambda1, range(8))))
    40. print(reduce(lambda2, range(8)))
    42. print(list(filter(lambda3, range(8))))
    44. # 练习：计算5!+4!+3!+2!+1!的和
    45. # 要求：使用我们刚刚讲的lambda和map reduce filter
    47. # 5!= 5*4*3*2*1
    48. la1 = lambda x, y: x*y
    50. print(reduce(la1, range(1, 6)))
    52. la2 = lambda n: reduce(la1, range(1, n+1))
    53. print(list(map(la2, range(1, 6))))
    55. la3 = lambda a, b: a+b
    57. print(reduce(la3, list(map(la2, range(1, 6)))))