TinyDB and List problem

Hi, I'm doing the program for keep appear the student's information that user put and possible to edit with Tiny DB storage when in screen. However, when I run the code, It compile the error, ouput compile with brackets. How can I solve it?

screen:
image

code:


I want to student's information keep showing when user enter the app. It should keep having data even if users exist in the app.

You are dealing with lists and that is the reason that you see brackets.If you are going to save only one student no need to add info in a list.

I see! I will try again. Thank you.

Learn to use tables and dictionaries, with one row per student grade.