購物車最佳化，

購物車最佳化，

　　終於，終於，在自己這幾天無數次跳坑之後，終於爬出來了。把裡面所有的問題都修正了。

　　程式顯的有些繁瑣，但是對於我這個水平來說，已經是很高興了，畢竟學了並不是很久，供新手學習還是有些協助的。自己肯定也會越來越努力，好好學習，加油！

  1 __Author__ = "Zhang Peng"  2 product_list = [  3     ('Iphone', 5888),  4     ('筆記本', 12888),  5     ('手錶', 10600),  6     ('電視', 3888),  7     ('書', 58),  8 ]  9  10 id_list = ["商家", "使用者", "shangjia", "yonghu"] 11 id_shopping = input("Please input your ID:\n") 12  13 exit_flag = False 14  15 if id_shopping == "shangjia": 16     choice = input("你是否想添加\修改商品？添加商品輸入'1'，修改商品輸入'2',退出輸入'q':\n") 17     if choice == "1": 18         while not exit_flag: 19             name = input("請輸入您想添加的商品名稱：\n") 20             name2 = input("請輸入您添加商品的價格：\n") 21             if name == "q" or name2 == "q": 22                 exit_flag = True 23             else: 24                 product_list.append((name, name2), ) 25  26     elif choice == "2": 27         while not exit_flag: 28             name3 = input("請輸入您想修改價格的商品名稱：\n") 29             name4 = input("請輸入您想要修改的價格：\n") 30  31             if name3 == "q" or name4 == "q": 32                 exit_flag = True 33             else: 34                 a = product_list.index(name3) 35                 product_list.remove(name3) 36                 product_list.index((name3, name4)) 37  38     else: 39         if choice == "q": 40             exit_flag = True 41     print(product_list) 42  43  44 elif id_shopping == "yonghu": 45     shopping_list=[] 46     with open("shopping_list.txt","r",encoding="utf8") as f_shop1: 47         print("你的購物車裡已經有：") 48         print(f_shop1.read()) 49     with open("salary.txt","r",encoding="utf8") as f_salary1: 50         salary = f_salary1.read() 51         print(salary) 52     if salary.isdigit():  # isdigit 是判斷輸入的是不是一個數字 53         salary = int(salary) 54         while True: 55             print("我們有一下商品：\n") 56             for index, item in enumerate(product_list): 57                 print(index, item) 58             user_choice = input("請問你還想買什嗎？:\n") 59             if user_choice.isdigit(): 60                 user_choice = int(user_choice) 61                 if user_choice < len(product_list) and user_choice > 0: 62                     p_item = product_list[user_choice] 63                     if p_item[1] < salary:  # 買不起 64                         shopping_list.append(p_item) 65                         salary -= p_item[1] 66                         print("您買的商品已經加入購物車") 67                     else: 68                         print("沒錢別嘚瑟了") 69                 else: 70                     print("沒有您要的商品") 71             elif user_choice == 'q': 72                 print("----------shopping list----------") 73                 for p in shopping_list: 74                     print(p) 75                     with open("shopping_list.txt", "a", encoding="utf8") as f_shop2: 76                         f_shop2.write(str(p)) 77                 print("你還剩餘", salary) 78                 with open("salary.txt", "w", encoding="utf8") as f_salary2: 79                     f_salary2.write(str(salary)) 80                 exit() 81  82             else: 83                 print("輸入錯誤") 84  85 else: 86     shopping_list = [] 87     salary = input("請輸入你的月薪：\n") 88     if salary.isdigit():  # isdigit 是判斷輸入的是不是一個數字 89         salary = int(salary) 90         while True: 91             for index, item in enumerate(product_list): 92                 print(index, item) 93             user_choice = input("請問你想買什嗎？:\n") 94             if user_choice.isdigit(): 95                 user_choice = int(user_choice) 96                 if user_choice < len(product_list) and user_choice > 0: 97                     p_item = product_list[user_choice] 98                     if p_item[1] < salary:  # 買不起 99                         shopping_list.append(p_item)100                         salary -= p_item[1]101                         print("您買的商品已經加入購物車")102                     else:103                         print("沒錢別嘚瑟了")104                 else:105                     print("沒有您要的商品")106             elif user_choice == 'q':107                 print("----------shopping list----------")108                 for p in shopping_list:109                     print(p)110                     with open("shopping_list.txt", "a",encoding="utf8") as f_shop3:111                         f_shop3.write(str(p))112                 print("你還剩餘", salary)113                 with open("salary.txt", "w",encoding="utf8") as f_salary3:114                     f_salary3.write(str(salary))115                 exit()116 117             else:118                 print("輸入錯誤")

 　　希望能得到打什麼的評論，這才是我最大的學習動力！謝謝！