I'm getting an error as stated in the subject. thumbnail_urls is defined no where, is it from PIL?
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Thanks for the question. We are currently investigating and will update you shortly.
@rajapratapk thumbnail_urls not from PIL, You can define the thumbnail_urls as below.
thumbnail_urls = [img["thumbnailUrl"] for img in search_results["value"][:16]]

@rajapratapk We will now proceed to close this thread. If there are further questions regarding this matter, please tag me in your reply. We will gladly continue the discussion and we will reopen the issue.
I figured that out as well. However it is worth updating the article https://docs.microsoft.com/en-us/azure/cognitive-services/bing-image-search/quickstarts/python#feedback with this clue.
Thanks for the feedback - I've added this information to the quickstart article, and it should be visible soon.