def size(self):
        return len(self.dags)
format excel reference notation
dataset/ETHPy150Open airbnb/airflow/airflow/models.py/DagBag.size--crossover with--dataset/ETHPy150Open cloudera/hue/desktop/core/ext-py/tablib-0.10.0/tablib/packages/openpyxl/chart.py/Reference._get_ref