code: def editMeta(self, title=None, description=None):
          
          method = 'flickr.photosets.editMeta'
  
          if title is None:
              title = self.title
          if description is None:
              description = self.description
              
          _dopost(method, auth=True, title=title, \
                 description=description, photoset_id=self.id)
          
          self.__title = title
          self.__description = description
          return True
docs: Set metadata for photo. (flickr.photos.setMeta)