def get_groups(self, table_name):
        """
        Return list of all groups for a particular data type
        """
        df = self.dm[table_name]
        return list(df['group'].unique())
def get_groups ( self , table_name ) : df = self . dm [ table_name ] return list ( df [ 'group' ] . unique ( ) )
Return list of all groups for a particular data type