Problem with sqlite bindings

[scratchmyhead]

I'm trying to update a sqlite database and I get the following error: sqlite3.ProgrammingError: Incorrect number of bindings supplied. The current statement uses 1, and there are 4 supplied. I don't understand where I'm going wrong. The code is below:

        conn = sqlite3.connect('financial.db')
        c = conn.cursor()
        c.execute("SELECT * FROM totals")
        records = c.fetchall()

        for record in records:


            if record[0] ==arrivale.get():


                t = ratee.get()
                c.execute("UPDATE totals SET rent = ? ", (t))
                c.fetchall()