需求:
product_list = [ ("Iphone",5800), ("Mac Pro",9800), ("Bike",800), ("Watch",10600), ("Coffee",31), ("book",120), ] shopping_list = [] salary = input("Input your salary:") if salary.isdigit(): salary = int(salary) while True: ‘‘‘ for item in product_list: print(product_list.index(item),item) break ‘‘‘#方法一,其中break为test时跳出循环 for index,item in enumerate(product_list): print(index,item) user_choice = input("选择要买吗?>>>>") if user_choice.isdigit(): user_choice = int(user_choice) if user_choice < len(product_list) and user_choice >=0: p_item = product_list[user_choice] if p_item[1] <= salary: #买得起 shopping_list.append(p_item) salary -= p_item[1] print("Add %s into shopping cart, your current balance is \033[31;1m%s\033[0m"%(p_item,salary)) else: print("\033[41;1m你的余额只剩[%s]啦,还买个毛线\033[0m"% salary) else: print("product code [%s] is not exist! " % user_choice) elif user_choice == ‘q‘: print("-------shopping list--------") for p in shopping_list: print(p) print("Your current balance:",salary) exit() else: print("invalid option")
原文:https://www.cnblogs.com/zhengqiangchen/p/10808083.html