if x == 1: month = "January"
                elif x == 2: month = "February"
                elif x == 3: month = "March"
                elif x == 4: month = "April"
                elif x == 5: month = "May"
                elif x == 6: month = "June"
                elif x == 7: month = "July"
                elif x == 8: month = "August"
                elif x == 9: month = "September"
                elif x == 10: month = "October"
                elif x == 11: month = "November"
                elif x == 12: month = "December"
                for tiket in tiket_obj.browse(self.cr, self.uid, tiket_ids):

                    ticket_date = datetime.strptime(tiket.create_date, '%Y-%m-%d %H:%M:%S')

                    if int(ticket_date.month) == int(x):
                        amount += tiket.price

                result = {
                          'period': month,
                          'amount': amount,
                          }

                data.append(result)