<_io.BufferedRandom name =

[bowlofred]

Do you have a full traceback, not just the one line error from it?

The message suggests that somewhere is a function called "notes_counter", and that function is printed rather than called.

>>> def notes_counter():
...     pass
...
>>> print(notes_counter)
<function notes_counter at 0x10599cbf8>

But that function name doesn't appear in the code you've shown, and I don't see any references to that name in the tkinter or sqlite3 packages. Without a traceback there's nothing to tie the two together.