购物车程序

shoplist 可以自己修改喜欢的


salary_yj  用户信息文件





#!/usr/bin/env python
#打开文件加入到yj列表
with open("salary_yj","r",encoding="utf-8") as f:
    yj = eval(f.read())
#请用户输入用户名和密码，进行判断，并且显示出资金余额
while True:
    username = input("\033[34;42m请输入用户名: \033[0m")
    passwd = input("\033[34;42m请输入密码： \033[0m")
    if username == yj["name"] and passwd == yj["passwd"]:
        print("您的资金余额为:",yj["salary"])
    else:
        print("用户名或密码错误")
        exit()
#显示出资金后，问用户是否充值，然后进行判断y的话，用户输入金额+现有金额，写入文件

    while True:
        pay = input("请问要充值吗? (y/n): ")
        if pay == "y":
            pay_rmb =  input("请输入需要充值的金额: ")
            salary_new = yj["salary"] + int(pay_rmb)
            yj["salary"] = salary_new
            yj_pay_salary = (yj["salary"])
            print("\033[45m现在余额为%d\033[0m" %(yj_pay_salary))
            with open("salary_yj","w",encoding="utf-8") as ff:
                ff.write(str(yj))
#判断为n，打开shoplist,循环读取文件，并显示商品列表
        elif pay == "n":
            with open("shoplist","r") as f:
                for i in f:
                    print(i)
#请求用户输入选择列表，当用户输入数字时，进行判断
                while True:
                    select = input("请选择购买商品编码,退出请按exit : ")
                    with open("shoplist","r") as f_shop:
                        for line in f_shop:
#当用户选择商品编码等于循环文件的行数时，打印该行，如果选择exit，退出并打印用户购买的列表
                            if select == line[0]:
                                new_line = line.split()
                                print(new_line[1])
                            elif select == "exit":
                                print(yj["list"])
                                exit()
#同时判断用户的资金，如果小于该商品价值，打印余额不足，并退出该循环
                    with open("salary_yj","r",encoding="utf-8") as f:
                        yj = eval(f.read())
                        if yj["salary"] < int(new_line[2]):
                            print("您的余额不足: ")
                            break
                        else:
#反之，用户余额减去商品价值，写入用户信息文件，并打印用户购买记录
                            salary_buy= yj["salary"] - int(new_line[2])
                            yj["salary"] = salary_buy
                            yj["list"].append(new_line[1])
                            with open("salary_yj","w",encoding="utf-8") as f_new:
                                f_new.write(str(yj))
                            print("\033[45m您的购买记录：\033[0m",yj["list"])