A message encoding and decoding project in Python using the base64 library typically involves creating a program that can encode plain text messages into base64 format and decode base64 encoded messages back into their original plain text form. Designed and implemented a Python application with a graphical user interface (GUI) for encoding and decoding messages. The application uses the base64 library to perform the encoding and decoding operations, allowing users to input a message and a key for encryption or decryption