This program is actually a part of my final exam project. The lecturer asked us to write a simple program for encrypting a plaintext with affine cipher. We also were asked to crack this cipher and make our own documentation on it.
Basically you can use this program like any other simple python program. No inputs necessary. You can also change your desired plaintext/ciphertext inside the program. Make sure to have the modules needed in the same directory in order to make the cracking program works.