parameters: (self)
return_statement: return Thumb.query.filter_by(data_id=self.get_id()).one()
docstring: get thumb of data, with cache inside
          :return:
docstring_summary: get thumb of data, with cache inside
          :return:
docstring_tokens: get thumb of data with cache inside : return :
function: def get_thumb(self):
          """
          get thumb of data, with cache inside
          :return:
          """
          return Thumb.query.filter_by(data_id=self.get_id()).one()
function_tokens: def get_thumb ( self ) : return Thumb . query . filter_by ( data_id = self . get_id ( ) ) . one ( )