@provide_session
    def open_slots(self, session):
        used_slots = self.used_slots(session=session)
        return self.slots - used_slots
Sets the number of columns in the editor. If the number of columns
dataset/ETHPy150Open airbnb/airflow/airflow/models.py/Pool.open_slots--crossover with--dataset/ETHPy150Open rwl/muntjac/muntjac/ui/list_select.py/ListSelect.setColumns