The v201708 sample script "add_responsive_display_ad.py" uses package urllib2 to fetch internet image resource. However urllib2 is not available in Python 3.x and is replaced with urllib.request, but when I used urllib.request for this line and execute the full code

opener = urllib.request.build_opener(*client.proxy_config.GetHandlers())

The program return an message 'Unmarshalling Error: cvc-datatype-valid.1.2.1: 'b'/9j/4AAQSkZJRgABAQAAAQAB...........(a long encoded string)...' is not a valid value for 'base64Binary'.

We tried switching back to Python 2.x and run the code with urllib2, then the program works perfectly, but not with urllib.request under Python 3.x environment. So it seems this sample code is not compatible with Python 3.x which urllib2 is not available. Please help update the library to be compatible with both Python 2.x and Python 3.x if possible.

many thanks,