python - 我正在尝试从列表中删除一个字符串，然后将其写回文件

Question

分配是阶段 1 - 管理模式
当用户选择管理模式时，应该允许他们执行以下操作：

1. 将新产品添加到列表中（还必须添加该项目的数量及其成本）
2. 从列表中删除产品

3. 更改项目的数量

   def mang (grocerystock):
   
   mangchoice=int(input("What would you like to do? \n 1):Add a new product to the list? \n 2): Remove a product from the list?  \n 3: Change the quantity of an item  \n 4): Change the price of an item  \n  5): View items and their quantity and price"))
   
   if mangchoice == 1:
       infile=open("grocery_stock.txt", 'a')
       name=input("Please enter the new product's name would you like to add:")
       quant=int(input("Please enter the new product's quantity"))
       price=float(input("Please enter the new product's price"))
       grocerystock[0]=name
       grocerystock[1]=quant
       grocerystock[2]=price
       gS=str(grocerystock)
       gs=gS.strip("[',']")
       infile.write(gs + '\n')
   if mangchoice == 2:
       namedelete=input("what item would you like to remove")
       a=open("grocery_stock.txt", 'r')
       data_list= a.readlines()
       a.close()
       print (data_list)
       del data_list[namedelete]
       b= open ("grocery_stock.txt", 'w')
       b.writelines(data_list)
       b.close()
   def intro():
   choice=(int(input("Would you like to go to Managerial mode or Shop mode?(press 1 for Managerial and 2 for shop mode, to quit press 3)")))
   
   
   if choice == 1:
       print ('lets go')
       mang(grocerystock)
   elif choice == 0 :
       print ('loser')
   
   grocerystock= ["","",""]
   
   intro()
   

这是我到目前为止写的所有代码有什么想法吗？如果 mangchoice == 2，我试图删除的代码如下：

Answer 1

在 Python3 中，input返回一个字符串。看起来您需要将其转换为int：

namedelete = int(input("what item would you like to remove"))