docs: def top(self, container, ps_args=None):
          """
          Display the running processes of a container.
  
          Args:
              container (str): The container to inspect
              ps_args (str): An optional arguments passed to ps (e.g. ``aux``)
  
          Returns:
              (str): The output of the top
  
          Raises:
              :py:class:`docker.errors.APIError`
                  If the server returns an error.
          """
          u = self._url("/containers/{0}/top", container)
          params = {}
          if ps_args is not None:
              params['ps_args'] = ps_args
          return self._result(self._get(u, params=params), True)