class App():
    def __init__(self):
        self.root = tk.Tk()
        self.label = Label(text="")
        self.label.pack()
        self.update_clock()
        self.root.mainloop()

    def update_clock(self):
        now = time.strftime("%H:%M:%S")
        #self.label.configure(text=now)

        # Put Arrivals in box===============================================================
        arrivallb.delete(0, END)
        now = dt.datetime.now()
        dte = now.strftime("%m-%d-%Y")

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

        for record in records:
            if record[22] != "*":