Python - TypeError：元组索引必须是整数或切片，而不是str [duplicate]

Question

这个问题在这里已有答案：

How can I read inputs as numbers? 20个答案

当我试图在我的'shop'中购买东西时，shell崩溃时出现“TypeError：tuple indices必须是整数或切片，而不是str”消息。此外，代码运行良好，直到我尝试购买东西。

def store():
    os.system('cls')
    print("Welcome to the shop!")
    print("What would you like to buy?")
    print("1.) Greatsword - 40 gold")
    print("0.) Back")
    print(' ')
    option = input(' ')

    if option in weapons:
        if PlayerIG.gold >= weapons[option]:
            os.system("cls")
            PlayerIG.gold -= weapons[option]
            PlayerIG.weap.append(option)
            print("You have bought %s!" % option)
            option = input(' ')
            store()
        else:
            os.system('cls')
            print("You cannot afford this.")
            option = input(' ')
            store()

    elif option == "Back":
        start1()
    else:
      os.system("cls")
      print("That item does not exist.")
      option = input(' ')
      store()

然后我收到这个错误：

Traceback (most recent call last):
  File "C:UsersChrisDesktopAmalgia ArenaAmalgiaArena.py", line 284, in <module>
    main()
  File "C:UsersChrisDesktopAmalgia ArenaAmalgiaArena.py", line 60, in main
    start()
  File "C:UsersChrisDesktopAmalgia ArenaAmalgiaArena.py", line 90, in start
    start1()
  File "C:UsersChrisDesktopAmalgia ArenaAmalgiaArena.py", line 109, in start1
    store()
  File "C:UsersChrisDesktopAmalgia ArenaAmalgiaArena.py", line 262, in store
    if PlayerIG.gold >= weapons[option]:
TypeError: tuple indices must be integers or slices, not str

我看过其他具有相同错误及其解决方案的代码，但我对Python非常陌生，因此我无法弄清楚我需要修复的内容。如果我需要发布更多代码，那么我会。此外，我是这个网站的新手，所以如果你想因为某种原因（坏问题，坏代码等）打击我，那么请这样做。我愿意学习：D