[Tkinter] Trying to add data into a shelf from a submit button

[Yoriz]

To get the input from shelve into the GUI when it is created you could change

        #open text file
        student_scores = shelve.open('student_name', 'c')
         
        #Display menue here here
        self.student_name = StringVar()

to

        #open text file
        with shelve.open('student_name', 'c') as db:
            student_name = db["Student Name"]
        
        #Display menue here here
        self.student_name = StringVar()
        self.student_name.set(student_name)

This will open the file and automatically close it after the value has been read into student_name
Then the StringVar is set to the value from student_name

The following close is not needed as it automatically closed above

        #close test file
        student_scores.close()

In the button handler event you didn't do anything with shelve, that is why nothing happened

    #function to set student names
    def set_names(self):
        student_name = [self.student_name.get()]
        print("submitt function pressed")

You can change it to

    #function to set student names
    def set_names(self):
        student_name = self.student_name.get()
        print("submitt function pressed")
        with shelve.open('student_name', 'c') as db:
            db["Student Name"] = student_name

---

Also, the entry needs to be told to use the stringvar
Change

#text box
self.input = Entry(self)
self.input.grid(row = 7, column = 1)

to

#text box
self.input = Entry(self,textvariable=self.student_name)
self.input.grid(row = 7, column = 1)