code: def construct_url(self, style):
          
          if style is API_URL:
              if self._ssl:
                  return 'https://{}:{}'.format(self._host, self._port)
              else:
                  return 'http://{}:{}'.format(self._host, self._port)
          elif style is SOCKET_URL:
              if self._ssl:
                  return 'wss://{}:{}'.format(self._host, self._port)
              else:
                  return 'ws://{}:{}'.format(self._host, self._port)
          else:
              return None
docs: Return http/https or ws/wss url.