def format_param_list(listed_params, output_name):
        '''
            Utility method for formatting lists of parameters for api consumption
            Useful for email address lists, etc
            Args:
                listed_params (list of values) - the list to format
                output_name (str) - the parameter name to prepend to each key
        '''
        output_payload = {}
        if listed_params:
            for index, item in enumerate(listed_params):
                output_payload[str(output_name) + "[" + str(index) + "]" ] = item
        return output_payload
Utility method for formatting lists of parameters for api consumption
            Useful for email address lists, etc
            Args:
                listed_params (list of values) - the list to format
                output_name (str) - the parameter name to prepend to each key