code: def set_user_permission(rid, uid, action='full'):
      
      rid = rid.replace('/', '%252F')
      # Create ACL if it does not yet exist.
      ensure_resource(rid)
  
      # Set the permission triplet.
      try:
          acl_url = urljoin(_acl_url(), 'acls/{}/users/{}/{}'.format(rid, uid, action))
          r = http.put(acl_url)
          assert r.status_code == 204
      except DCOSHTTPException as e:
          if e.response.status_code != 409:
              raise
docs: Sets users permission on a given resource.  The resource will be created
          if it doesn't exist.  Actions are: read, write, update, delete, full.
  
          :param uid: user id
          :type uid: str
          :param rid: resource ID
          :type rid: str
          :param action: read, write, update, delete or full
          :type action: str