def __init__(self, connection=None):
        """
        :param str connection: custom database connection SQL Alchemy string
        """
        super(DbManager, self).__init__(connection=connection)
        self.tables = get_table_configurations()
def __init__ ( self , connection = None ) : super ( DbManager , self ) . __init__ ( connection = connection ) self . tables = get_table_configurations ( )
:param str connection: custom database connection SQL Alchemy string