取得附加的属性值(对于必须出现重复的attach_string,可以采用在最后加双下划线的方法规避) :param attach_string: 附加属性的字符串 'operation_query' :return: {'a':'b'} --附加属性的dict
(attach_string)
source not stored for this graph (policy: none)
no outgoing calls
no test coverage detected