第五次作业

import numpy
import datetime


def 数列相加(n):
    a = list(range(n))
    b = list(range(n))
    c = []
    for i in range(n):
        c.append(a[i]+b[i])
    return c


def 数组相加(n):
    a = numpy.arange(n)
    b = numpy.arange(n)
    c = a+b
    return c


def 执行时差():
    now1 = datetime.datetime.now()
    数列相加(300000)
    now2 = datetime.datetime.now()
    数组相加(300000)
    now3 = datetime.datetime.now()
    time = (now2-now1)-(now3 - now2)
    print("列表执行时间(30W数据)：" , now2-now1,"\n数组执行时间(30W数据)：" , now3-now2)

if __name__ == "__main__":
    print(数列相加(20))
    print(数组相加(20))
    执行时差()