Code execution vulnerability

In your code, you are using the function eval(), which allows the user to execute any python code inputted, like __import__('os').system('whoami') .

[h4ck0lympus]

He should have used text box instead of input text box, In that case input would have been controlled by software instead

[h4ck0lympus]

Moreover it doesn't even matter unless you are running your GUI on some kinda server, which I don't think you will ever do so.