python学习--购物车2

将购物车程序分模块编程，购物车1写了登录 部分，下面改写购物部分：

#!/usr/bin/env python

product_list = [[‘Iphone7‘,5800],                [‘coffee‘,30],                [‘tea‘, 10],                [‘Python Book‘,99],                [‘Bike‘, 199],                [‘ViVo X9‘,2499]]

shopping_cart = {}

username = input("username:")print("****************************")password = input("password:")print("****************************")

i = 1while i <= 3:   #登录判断    if username == "maomao" and password == "123":        print("welecom to shopping maket")        break

elif i == 3:        print("input more than three times, try again after 2 hours")        break    else:        print("you put an wrong name or password,please input again")

i += 1    username = input("username:")    password = input("password:")

print("***************   系统操作说明   ****************")print("   q : 退出系统")print("   c : 账号充值")print("   h : 购物记录")print("   l : 商品列表")print("************************************************")

salary = 0while True: #充值判断    temp = input("you account is zear,please rechange money to buy:")

if temp.isdigit():        salary = int(temp)        break

print("you input a unknow number,please check it and input again!")

while True:    index = 0    for product in product_list:  #打印商品列表，在商品之前添加序号，购物时只需要选择序号即可        print(index,product)        index += 1

choice = str(input(">>:")).strip()

if choice.isdigit():  #判断输入是否为数据        choice = int(choice)        if choice >= 0 and choice < len(product_list):  #所选数字是否在商品序号范围内            product = product_list[choice]            if product[1] <= salary:   #账户所剩金额是否够支付所选商品                if product[0] in shopping_cart: #同一种商品，多次购买，实现商品数量叠加                    shopping_cart[product[0]][1] += 1                else:                    shopping_cart[product[0]] = [product[1], 1]                salary -= product[1]                print("\033[42;1mAdded product:"+ product[0] +" into shoing cart ,you current balance "                      + str(salary)+"\033[0m")            else: #账户余额不足提醒                print("\033[42;1m [warning] you balance is no enough\033[0m, product:"+str(product[1])+" short for "                      + str(product[1]-salary))        else:            print("You choice product is no in product_list")    elif choice == "q":  #退出        print("\033[34;1m---------------product list-----------------\033[0m")        print("\033[42;1m")        print("id   product       number pric Totalpric")        index = 1        total_mon = 0

f = open("product.txt","a+",encoding="utf8")  #因为要记录多次购物记录，所以此处打开模式为追加写        import datetime

for i in shopping_cart.keys():  #打印购物列表，并打印商品数量，以及金额            total_mon += shopping_cart[i][1] * shopping_cart[i][0]

print("%d %10s %7d %7d %7d" %(index,i,shopping_cart[i][1], shopping_cart[i][0],            shopping_cart[i][1] *shopping_cart[i][0]))

if index == 1:                now_time = datetime.datetime.now().strftime(‘[%Y-%m-%d]‘)                f.write(now_time +"\n")            f.write(i+ "%7d"%+shopping_cart[i][0]+"\n")  #保存购物列表            f.write(i + "\n")            index += 1        f.close()

print("you pay money is:", total_mon)        print("you level money is:", salary)        print("\033[0m")        print("\033[34;1m-------------end-------------\033[0m")        break    elif choice == "c":  #充钱        salary += int(input("please input you recharge:"))

print("当前账户余额:",salary)        continue    elif choice == ‘h‘:        f = open("product.txt", "r+", encoding="utf8")

for i in f:            print(i.strip())        continue    else:        print("You input wrong oper,please input again!")