I have div with just class name

[Ahmer Zunair]

datalist = soup.findAll(lambda tag: tag.name=="div" and tag.get("class") == "card-content text-small description mini-scroll")[0].string
       

Error:

list index out of range 

[facelessuser]

I think your problem is that for HTML, tag.get("class") returns a list of classes, not a string. Something like this would work:

datalist = soup.find_all(lambda tag: tag.name=="div" and tag["class"] == ['card-content', 'text-small', 'description', 'mini-scroll'])[0]

With that said, I personally find using selectors, in this case, more straight forward:

datalist = soup.select('div.card-content.text-small.description.mini-scroll')[0]

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