NameError: 名称 '\[string\]' 未定义

Question

新手上路，请多包涵

在测试我的程序时，我不断收到此错误：

 1. Encrypt a file
2. Decrypt a file
----> 1
Enter the filename you'd like to encrypt: test
Traceback (most recent call last):
  File "./encrypt.py", line 71, in <module>
    Main()
  File "./encrypt.py", line 58, in Main
    filename = input("Enter the filename you'd like to encrypt: ")
  File "<string>", line 1, in <module>
NameError: name 'test' is not defined

这是我的 Main() 函数代码：

 def Main():
        print("1. Encrypt a file")
        print("2. Decrypt a file")
        choice = str(input("----> "))
        if choice == '1':
                filename = input("Enter the filename you'd like to encrypt: ")
                password = input("Enter a password used for the encryption tool: ")
                encrypt(getKey(password), filename)
                print("File has been encrypted.")
        elif choice == '2':
                filename = input("Enter the filename you'd like to decrypt: ")
                password = input("Enter the password used for the encryption of this file: ")
                decrypt(getKey(password), filename)
                print("File has been decrypted. Note that if the password used in the encryption does " \
            + "not match the password you entered in, the file will remain encrypted.")
        else:
                print("Invalid option. Closing the program...")

我正在使用简单的 input() 方法来获取我的数据（例如“测试”），并且它一直告诉我我在运行时输入的任何信息，我刚刚输入的名称没有定义。我没有看到任何格式错误、语法错误等。