'Get Values: formats values for list template.
returns [{\'col_name\':\'col_value\',....},{\'col_name\':\'col_value\',....}]
:param lst:
The list of item objects from query
:param list_columns:
The list of columns to include'

def get_values(self, lst, list_columns):

    for item in lst:
        retdict = {}
        for col in list_columns:
            retdict[col] = self._get_attr_value(item, col)
        (yield retdict)
