计算器

#!/usr/bin/env python#!--coding:utf-8 --#!shenjie :2018/1/23 22:34#!@Auther :shenjie#!@file: 计算器.pydef add(string):    total=0    numbers=[]    numbers+=string.split('+')    for num in numbers:        total+=int(num.strip())    print('{0}={1}'.format(string,total))def reduce(string):    result=0    numbers=[]    numbers+=string.split('-')    result=int(numbers[0].strip())    numbers.pop(0)    for num in numbers:        result-=int(num.strip())    print('{0}={1}'.format(string,result))def ride(string):    total=1    numbers=[]    numbers+=string.split('*')    for num in numbers:        total*=int(num.strip())    print('{0}={1}'.format(string,total))def division(string):    result=0    numbers=[]    numbers+=string.split('/')    result=int(numbers[0].strip())    numbers.pop(0)    for num in numbers:        result /=int(num.strip())    print("{0}={1}".format(string,result))if __name__=='__main__':    print('  ##################################################')    print('  ###################欢迎来到计算中心##################')    print('  ##################################################')    print("1:  加法：a+b+c+d")    print("2:  减法：a-b-c-d")    print("3:  乘法：a*b*c*d")    print("4:  除法：a/b/c/d")    method=input("Please input num:(1/2/3/4): ")    if method == "1":        string=input("请输入您的表达式：")        add(string)    elif method == "2":        string=input("请输入您的表达式：")        reduce(string)    elif method == "3":        string=input("请输入您的表达式：")        ride(string)    elif method == "4":        string=input("请输入您的表达式：")        division(string)    else:        print("您输入的错误，只能输入1/2/3/4")

tuple操作

dict

其他常用操作