def __call__(self, server_descriptions):
        return secondary_with_tags_server_selector(
            self.tag_sets,
            server_descriptions)
Append a :class:`~.schema.Column` to this :class:`~.schema.Table`.
dataset/ETHPy150Open mongodb/mongo-python-driver/pymongo/read_preferences.py/Secondary.__call__--crossover with--dataset/ETHPy150Open RoseOu/flasky/venv/lib/python2.7/site-packages/sqlalchemy/sql/schema.py/Table.append_column