Classes, tkinter and listboxes

Question

https://code.sololearn.com/cs5ww4Xl68Zm/?ref=app
I’m trying to add the contents typed in by the user from the entries in to the listbox but it keeps giving me a Nonetype error, please help

Answer 1

Sololearn doesn't support GUI. if you are on Android, download Pydroid and copy your code there
https://code.sololearn.com/cMXnnd0tqe77/?ref=app

Answer 2

thanks