Why won't the sqlite3 database be saved after closing the application?

Question

Python

Hello, I would like to ask why after closing the application the sqlite3 database is not saved
Code - https://pastebin.com/3c3ydw0P
There are no errors when switching on

Answer 1

Where is your connection to the database? Path to file? You probably have it in inmemory mode, so nothing is saved.
By the way, your data insertion option is not very good. Use placeholders.