Python 选择后重复输入

我是编程新手，我第一次尝试的程序是一个可以将玩家添加到名为

whitelist.txt

的文件中的程序。我有一个菜单，用户可以选择选项，我希望它在选择一个选项后重复。但是，输入不起作用。这是我的代码：

 stuck_forever = True
 home_input = input('What you like to do?' + '\n 1) add a user to the whitelist' + '\n 2) list users in whitelist' + '\n> : ')

# appends the input to the whitelist text file
if home_input == '1':
     a_whitelist = open ('whitelist.txt','a')
     input_username = input('Please enter the username you would like to whitelist: ')
     append_username = input_username + '\n'
     a_whitelist.write(append_username)
     a_whitelist.close()
     print('User added to the whitelist!\n')

while stuck_forever == True:
    home_input = input('What you like to do?' + '\n 1) add a user to the whitelist' + '\n 2) list users in whitelist' + '\n> : ')    

# prints the whitelist and counts the amount of players in the list
if home_input == '2':
   open_whitelist = open('whitelist.txt','r')
   r_whitelist = open_whitelist.read()
   number_users = len(r_whitelist.split())
   print(f'\nThere are {number_users} players whitelisted at the moment..' + '\n')
   print(r_whitelist)
   open_whitelist.close()

while stuck_forever == True:
    home_input = input('What you like to do?' + '\n 1) add a user to the whitelist' + '\n 2) list users in whitelist' + '\n> : ')

如果有人能帮我，那就太棒了！

---

谢谢

您需要创建一个循环，并将所有数据保存命令放在该循环中。比如：

stuck_forever = True
while stuck_forever == True:
    home_input = input('What you like to do?' + '\n 1) add a user to the whitelist' + '\n 2) list users in whitelist' + '\n> : ')
    if home_input == '1':
        a_whitelist = open ('whitelist.txt','a')
        input_username = input('Please enter the username you would like to whitelist: ')
        append_username = input_username + '\n'
        a_whitelist.write(append_username)
        a_whitelist.close()
        print('User added to the whitelist!\n')

    elif home_input == '2':
       open_whitelist = open('whitelist.txt','r')
       r_whitelist = open_whitelist.read()
       number_users = len(r_whitelist.split())
       print(f'\nThere are {number_users} players whitelisted at the moment..' + '\n')
       print(r_whitelist)
       open_whitelist.close()
    elif home_input == "exit":
        break
    else:
        print("Invalid Choice!")

---

您需要将整个逻辑都放在循环中，这样它才能永远运行，或者直到您选择退出为止

while True:
    home_input = input('What you like to do? \n 1) add a user to the whitelist \n 2) list users in whitelist 3) exit : ')
    if home_input == '1':
        a_whitelist = open ('whitelist.txt','a')
        input_username = input('Please enter the username you would like to whitelist: ')
        append_username = input_username + '\n'
        a_whitelist.write(append_username)
        a_whitelist.close()
        print('User added to the whitelist!\n')
    if home_input == '2':
        open_whitelist = open('whitelist.txt','r')
        r_whitelist = open_whitelist.read()
        number_users = len(r_whitelist.split())
        print(f'\nThere are {number_users} players whitelisted at the moment..\n')
        print(r_whitelist)
        open_whitelist.close()
    if home_input == '3':
        break 

---

我已对您的程序结构进行了一点修改，使其有点传统，并解决了问题：

stuck_forever = True

while stuck_forever == True:
    home_input = input('What you like to do?' + '\n 1) add a user to the whitelist' + '\n 2) list users in whitelist'+'\n 3) Exit' + '\n> : ')

    if home_input == '1':
        a_whitelist = open ('whitelist.txt','a')
        input_username = input('Please enter the username you would like to whitelist: ')
        append_username = input_username + '\n'
        a_whitelist.write(append_username)
        a_whitelist.close()
        print('User added to the whitelist!\n')
    elif home_input == '2':
        open_whitelist = open('whitelist.txt','r')
        r_whitelist = open_whitelist.read()
        number_users = len(r_whitelist.split())
        print('\nThere are {number_users} players whitelisted at the moment..' + '\n')
        print(r_whitelist)
        open_whitelist.close()
    # To exit the loop
    elif home_input == '3':
        break

---

希望有帮助

你能指定“它不工作”是什么意思吗？是的，选项列表会出现，但在我输入后：比如说1，选项会一次又一次地出现。但是我不能输入任何东西

我不能输入任何东西。

。你这是什么意思？我想在我添加了一个玩家后重复选择列表。这在第一次使用时效果很好。但是在列表重复之后，我可以输入1，但是列表再次重复。我无法添加其他玩家，只是列表会非常精确地重复！我可能在你也在的时候写下了答案！我的几乎一样+祝你好运