code: def add_url(self, url, description=None):
          
          url = {
              'value': url,
          }
          if description:
              url['description'] = description
          self._append_to('urls', url)
docs: Add a personal website.
  
          Args:
              :param url: url to the person's website.
              :type url: string
  
              :param description: short description of the website.
              :type description: string