db_urls = [item['url'] for item in url_list.find()]
index_urls = [item['url'] for item in item_info.find()]
x = set(db_urls)
y = set(index_urls)
rest_of_urls = x-y
db_urls = [item['url'] for item in url_list.find()]
index_urls = [item['url'] for item in item_info.find()]
x = set(db_urls)
y = set(index_urls)
rest_of_urls = x-y
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