Python 购物车----之用户部分

2017-01-11 07:55:47来源:cnblogs.com作者:FrankB人点击

知识点: 文件读,写操作,if 判断, for 循环

salary = input("输入你的工资:")bought_list = []product_list = {}with open("product_list","r",encoding="utf-8") as f1:    for item in f1:        p_name,p_price = item.strip().split(':')        product_list[p_name]=int(p_price)print(product_list)if salary.isdigit():    salary = int(salary)    while True:        user_choice = input("please input product which you want:")        if user_choice in product_list.keys():            if product_list[user_choice] <= salary:                bought_list.append(user_choice) #增加列表的元素                salary = salary - product_list[user_choice]                print("Had bought  [/033[32;1m%s/033[0m], and your balance is /033[31;1m%s/033[0m"%(user_choice,salary))                print(bought_list)            else:                print("Your balance is less than product's price")                continue        elif user_choice is 'q':            with open('bought.txt','w+',encoding='utf-8') as f2:                for goods in bought_list:                    print(goods,file=f2)            exit(print("You had bought  %s goods, and your balance is %s"%(bought_list, salary)))        else:            print("The good had been sold out")

测试:

输入你的工资:15000{'Python': 20, 'Iphone': 5288, 'Iwatch': 3288, 'Bike': 2400, 'Mac pro': 12888}please input product which you want:PythonHad bought  [Python], and your balance is 14980['Python']please input product which you want:BikeHad bought  [Bike], and your balance is 12580['Python', 'Bike']please input product which you want:Mac proYour balance is less than product's priceplease input product which you want:IwatchHad bought  [Iwatch], and your balance is 9292['Python', 'Bike', 'Iwatch']please input product which you want:qYou had bought  ['Python', 'Bike', 'Iwatch'] goods, and your balance is 9292

 

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