Stackoverflow request help

myfile.py

# Function files:
def convert_to_csv(json_format):
    """Converts json to csv."""
    csv_data = ""

    if json_format:
        for x in json_format:
            csv_data += str(x['name']) + "," + str(x['flowrate']) + "," + str(x['temperature']) + "," + str(x['power']) + "," +str(x['log_time']) + "," + str(x['created_on']) + "\n"
    return csv_data

def write_csv_from_query(resp, query, status, header, result_func):
    """Writes CSV response."""
    csv_name = date_to_str(datetime.now()) + ".csv"
    csv_header = ','.join(header) + "\n"
    # csv_data = convert_to_csv(result_func(query))
    csv_data = []
    csv_data = result_func(query)
    csv_data = ','.join(csv_data)

    resp.status = status
    resp.content_type = 'text/csv'
    resp.set_header('Content-disposition', 'attachment; filename=' + csv_name)
    resp.body = csv_header + csv_data
    
    

API CALL File:
    def on_get(self, req, resp, id):
        """Generates CSV for log."""



        qry = db.Session.query(db.Log, db.Location).\
                        filter(db.Log.location_id == db.Location.id).\
                        filter(db.Log.location_id == id)

        qry = helpers.filter_between_dates(qry, req, db.Log.log_time)

        header = ['Location','Flow Rate','Temperature','Power Consumption','Log Time','Created on']

        # helpers.write_csv_from_query(resp, qry, falcon.HTTP_200, header,
        #     lambda q:[{
        #         'name': location.name,
        #         'flowrate': str(obj.flowrate),
        #         'temperature': str(obj.temperature),
        #         'power': str(obj.power),
        #         'log_time': helpers.datetime_to_str(obj.log_time),
        #         'created_on': helpers.date_to_str(obj.created_on)
        #     } for obj, location in q.all()])

        helpers.write_csv_from_query(resp, qry, falcon.HTTP_200, header,
                lambda q: [[location.name, str(obj.flowrate)] for obj, location in q.all()]
            )