def Sum(n):          

    

a

=

list

(

range

(n))

    

b

=

list

(

range

(

0

,

50000

*

n,

5

))

    

c

=

[]

    

for

 i in range(len(a)):

        

c.append(a[i]

*

*

2

+

b[i]

*

*

3

)

    

return

 c

print

(

Sum

(

20

))

 

import

 numpy as py

 

def

 pySum(n):

    

a

=

py.array(

range

(n))

    

b

=

py.array(

range

(

0

,

500000

*

n,n))

    

c

=

[]

    

for

 i in range(len(a)):

        

c.append(a[i]

*

*

2

+

b[i]

*

*

3

)

    

return

 c

print

(pySum(

20

))

 

 

import

 datetime

def

 new4():

    

now1

=

datetime.datetime.now()

    

Sum

(

30000

)

    

now2

=

datetime.datetime.now()

    

pySum(

30000

)

    

now3

=

datetime.datetime.now()

    

print

(

"sum执行时间(30W数据)："

 , now2-now1,"\npysum数组执行时间(30W数据)：" , now3-now2)

new4()

 

 

 

 

执行结果：