appengine.py 文件源码

def _validate(self, value):
            """Validates a value as a proper Flow object.

            Args:
                value: A value to be set on the property.

            Raises:
                TypeError if the value is not an instance of Flow.
            """
            logger.info('validate: Got type %s', type(value))
            if value is not None and not isinstance(value, Flow):
                raise TypeError('Property %s must be convertible to a flow '
                                'instance; received: %s.' % (self._name,
                                                             value))