def __str__(self):
    return ('Task - change_date: %(change_date)s, create_date: %(create_date)s, result: %(result)s, status: %(status)s, ticket: %(ticket)s, user_id: %(user_id)s, worker_id: %(worker_id)s' % self.to_dict())
def __str__(self):
    return ('Task - change_date: %(change_date)s, create_date: %(create_date)s, result: %(result)s, status: %(status)s, ticket: %(ticket)s, user_id: %(user_id)s, worker_id: %(worker_id)s' % self.to_dict())