写两个计算数组的加减乘除的代码，一个调包一个不调

Question

如何自定义函数，计算数组的加、减、乘、除四种运算
需要两个代码对比调包与不调包运行速度有哪些区别，并打印出程序运行时间

Answer 1

• 分别调用函数100次
  

  

  
  

  

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• 代码运行效果截屏图片
  

  

代码

#!/sur/bin/nve python
# coding: utf-8
from time import time 
import numpy as np

def calc1(a, b):
    result = [a[0]+b[0] for i in range(len(a))]
    print('\na+b =', result)
    
    result = [a[0]-b[0] for i in range(len(a))]
    print('\na-b =', result)
    
    result = [a[0]*b[0] for i in range(len(a))]
    print('\na×b =', result)
    
    result = [a[0]/b[0] for i in range(len(a))]
    print('\na÷b =', result)
    

def calc2(a, b):
    a = np.array(a)
    b = np.array(b)
    print(f"\n\na+b = {a+b}\n\na-b = {a-b}\n\na×b = {a*b}\n\na÷b = {a/b}")


if __name__ == '__main__':
    a, b = list(range(2, 50)), list(range(52, 100))
    print(f"\n数组a = {a}\n\n数组b = {b}")
    start = time()
    calc2(a, b)
    print(f"\n调库用时{time()-start}s")
    start = time()
    calc1(a, b)
    print(f"\n不调库用时{time()-start}s")

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