第五次作业

#列表循环实现数组相加
def Sum(n):
    a=list(range(n))
    b=list(range(0,5*n,5))
    c=[]
    for i in range(len(a)):
        c.append(a[i]+b[i])
    return (c)
print(Sum(10))

# #用numpy实现数组相加
import numpy
def arySum(n):
    a=numpy.arange(n)
    b=numpy.arange(0,8*n,8)
    c=a+b
    return (c)
print(arySum(10))

from  datetime import datetime
# #列表实现数组相加的效率
s_sum=datetime.now()
Sum(20000000)
delta_sum=datetime.now()-s_sum
print(delta_sum)
#numpy实现数组相加的效率
s_numpy=datetime.now()
arySum(20000000)
delta_numpy=datetime.now()-s_numpy
##numpy实现数组相加的效率
print(delta_numpy)