def __init__(self, column_name, name, aggregate_func=aggregate_count, aggregate_col=''):
        self.column_name = column_name
        self.name = name
        self.aggregate_func = aggregate_func
        self.aggregate_col = aggregate_col
Constructor.
dataset/ETHPy150Open dpgaspar/Flask-AppBuilder/flask_appbuilder/models/group.py/BaseGroupBy.__init__