一、购物车小程序第一版
#!/usr/bin/env python # -*- coding:utf-8 -*- # Author:Hiuhung Wan product_list = [ ("iphone 8", 5888), ("Mi Note3", 2499), ("Bike", 788), ("Phthon 3.5", 59), ("Mac pro", 9888), ("Honor 6", 599) ] notfalse = not False shopping_cart = [] while notfalse: salary = input("Input your salary:") if salary.isdigit(): salary = int(salary) while True: # for i in product_list: # print(product_list.index(i),i) for index, i in enumerate(product_list): print(index, i) # 打印商品列表 user_choice = input("Please choose what you need to buy:") if user_choice.isdigit(): user_choice = int(user_choice) if user_choice < len(product_list) and user_choice >= 0: # 用户选择了对应的商品 if product_list[user_choice][1] <= salary: # 买得起 salary = salary - product_list[user_choice][1] # 扣钱 shopping_cart.append(product_list[user_choice]) print("You have purchased %s, and your current balance is %s." % ( product_list[user_choice], salary)) elif user_choice == "": # 直接按的回车,没有输入 print("Please enter the corresponding number of the goods!") else: # 钱不够,买不起! print("Your balance is not enough!") else: # 用户输入的数字超出商品总数 print("Please check the commodity number!") elif user_choice == "q" or user_choice == "Q": # 要退出 print("------------shopping list-------------") for index, i in enumerate(shopping_cart): print(index, i) print("Your current balance is %s." % salary) exit() else: # 用户输入的不是数字 print("Please enter the corresponding number of the goods!") elif salary == "q" or salary == "Q": # 用户想退出 notfalse = False else: # 用户输入了其他字符 print("Please input your salary by number!")