How to Beautiful Soup (bs4) match just one, and only one, css class

Question

I am using following code to match all div that have CSS class \"ad_item\".

soup.find_all(\'div\',class_=\"ad_item\")

problem that I have i

Answer 1

I have found one solution, although it have nothing to do with BS4, it is pure python code.

for item in soup.find_all('div',class_="ad_item"):
     if len(item["class"]) != 1:
         continue;

It basically skip item, if there is more than one CSS class.