Python running SQL statement in threaded timer

Question

I am trying to run a SQL statement every minute, but I need to be able to iterate through incoming data as well continuously. So I have made a thread timer that I found with the help of another SO question, but I am receiving the following error when trying to run it. What are some solutions to this?

sqlite3.ProgrammingError: SQLite objects created in a thread can only be used in that same thread.The object was created in thread id 18460 and this is thread id 29296

Here is a sample of the timer code. I am using a update every second here for testing purposes only.

def update():
    threading.Timer(1.0, update).start()
    cursor.execute("UPDATE users SET timer = timer + 1")
    db.commit()
    print("Updating all timers")
update()

Answer 1

This should work by putting the connection in the same thread. If you do it every minute I suppose its ok. Making a connection every second seems a bit expensive though.

def update():
    threading.Timer(1.0, update).start()
    conn = sqlite3.connect(db)
    cursor = conn.cursor()
    cursor.execute("UPDATE users SET timer = timer + 1")
    conn.commit()
    print("Updating all timers")
update()

To answer your question of 'why'. I think it is because your connection is on the main thread and your commit to the connection is on another. Hope this is correct and I hope this helps.