code: def element_should_not_exist(self, json_string, expr):
          
          value = self.select_elements(json_string, expr)
          if value is not None:
              raise JsonValidatorError('Elements %s exist but should not' % expr)
docs: Check that one or more elements, matching [ http://jsonselect.org/ | JSONSelect] expression, don't exist.
  
          *DEPRECATED* JSON Select query language is outdated and not supported any more.
          Use other keywords of this library to query JSON.
  
          *Args:*\n
          _json_string_ - JSON string;\n
          _expr_ - JSONSelect expression;\n
  
          *Raises:*\n
          JsonValidatorError