"Python" Programming Learning exercises-2

Tag: the sum () function provided by Python can accept a list and sum please write a prod () function to accept a list and use the reduce () to calculate the product:

1 #Python提供的sum () function can accept a list and sum, write a prod () function, you can accept a list and use reduce () to calculate the product:

Code:

2 3 from Functools import reduce 4 Li = [1,2,3,4,5,7] 5 print (sum (LI)) 6 7 def prod (x, y): 8 return x * y 9 Ten R = Reduce (Prod,li) one print (R)

Operation Result:

[[email protected] practice]# python map_reduce_2.py 22840[[email protected] practice]#

Code Explanation:

  2   3 from functools import reduce              #导入reduce模块   4 li = [1,2,3,4,5,7]                         #创建一个列表用于计算   5 print (sum (LI))                              #打印求和结果   6   7 def prod (x, y):                             #定义函数prod, pass in two parameters x,y  8     return x * y                           #返回xProduct of Y and   9  10 r = reduce (prod,li)                        #reduce   Incoming functions prod and list li  11 print (R)                                  # Print results

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"Python" Programming Learning exercises-2