1 介绍

有两个.py文件，分别为main.py和util.py，执行main.py时，调用util.py当中的函数。

main.py内容如下，

import util 

if __name__ == "__main__":
    a = [3.0,4.0]
    length = util.get_length_from_vec(a)
    print(f"length = {length}.")
    b = [6.0,8.0]
    distance = util.get_distance_between_two_points(a,b)
    print(f"distance = {distance}.")
    print("success!")

util.py内容如下，

import math 
import time 

def get_length_from_vec(vec: list)->float:
    length = 0.0 
    for x in vec:
        length += x * x 
    length = math.sqrt(length)
    return length 

def get_distance_between_two_points(point1: list, point2: list)->float:
    distance = 0.0
    x1, y1 = point1[0], point1[1]
    x2, y2 = point2[0], point2[1]
    distance = (x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1)
    distance = math.sqrt(distance)
    return distance 

执行main.py，可以得到如下结果，

length = 5.0.
distance = 5.0.
success!