def METHOD_NAME(iterable):
    """Stream JSON line-based data."""
    def _generate_stream():
        for row in iterable:
            values = []
            for value in row:
                values.append(stringify(value) or "")
            buffer = io.StringIO()
            writer = csv.writer(buffer, dialect="excel", delimiter=",")
            writer.writerow(values)
            yield buffer.getvalue()
    return Response(_generate_stream(), mimetype="text_csv")