Question

How can the following program be modified to allow the user to specify an encryption key other than 3 with a -k option?

Answer 1

To modify the program to allow the user to specify an encryption key other than 3 with a -k option, you can use command-line arguments in Python.

Step-by-step explanation:

To modify the program to allow the user to specify an encryption key other than 3 with a -k option, you can make use of command-line arguments in Python. Here's how you can do it:

1. Import the 'sys' module at the beginning of your code.
2. Use the 'argparse' module to create a command-line option for the encryption key.
3. Parse the command-line arguments and access the value of the encryption key provided by the user.
4. Use the obtained key to encrypt or decrypt the text.

By following these steps, you'll be able to modify the program to allow the user to specify a custom encryption key.