code: def get_beautiful_soup(self, source=None):
          
          from bs4 import BeautifulSoup
          if not source:
              self.wait_for_ready_state_complete()
              source = self.get_page_source()
          soup = BeautifulSoup(source, "html.parser")
          return soup
docs: BeautifulSoup is a toolkit for dissecting an HTML document
              and extracting what you need. It's great for screen-scraping!