code: def _operations_from_methods(handler_class):
          
          for httpmethod in yaml_utils.PATH_KEYS:
              method = getattr(handler_class, httpmethod)
              operation_data = yaml_utils.load_yaml_from_docstring(method.__doc__)
              if operation_data:
                  operation = {httpmethod: operation_data}
                  yield operation
docs: Generator of operations described in handler's http methods
  
          :param handler_class:
          :type handler_class: RequestHandler descendant