python之类型错误 : Object of type 'Entities' is not JSON serializable IBM Cloud natural language understanding

import json 
from watson_developer_cloud import NaturalLanguageUnderstandingV1 
import watson_developer_cloud.natural_language_understanding.features.v1 \ 
as Features 
 
natural_language_understanding = NaturalLanguageUnderstandingV1( 
username="username", 
password="password", 
version="2017-02-27") 
 
response = natural_language_understanding.analyze( 
text="IBM is an American multinational technology company headquartered \ 
in Armonk, New York, United States, with operations in over 170 \ 
countries.", 
features=[ 
Features.Entities( 
  emotion=True, 
  sentiment=True, 
  limit=2 
), 
Features.Keywords( 
  emotion=True, 
  sentiment=True, 
  limit=2 
) 
 ] 
 ) 
 
print(json.dumps(response, indent=2)) 

我是 IBM watson API 的新手......我正在尝试他们提供的这个示例代码，但我收到了这个错误

TypeError: Object of type 'Entities' is not JSON serializable

请您参考如下方法:

我通过转储 response.result 而不仅仅是 response 解决了这个问题。

API guide错误地说要使用:print(json.dumps(response, indent=2))

在查看 docstring in the source code 时我发现 DetailedResponse 类型包含“结果、 header 和 HTTP 状态代码”。

我认为 API 文档中的示例需要更新，以免误导人们。