code: def _css_select(soup, css_selector):
          
          selection = soup.select(css_selector)
          if len(selection) > 0:
              if hasattr(selection[0], 'text'):
                  retour = selection[0].text.strip()
              else:
                  retour = ""
          else:
              retour = ""
          return retour
docs: Returns the content of the element pointed by the CSS selector,
          or an empty string if not found