将 Twitter 搜索 json 响应传递给输出 json 的烧瓶路由

Question

我正在使用 python 库 python-twitter 访问 Twitter api。

我正在做一个搜索查询，并希望该响应符合我的 Flask 路线。

我收到这个错误

TypeError: <twitter.status.Status object at 0x7f16dc089110> is not JSON serializable

这是我的

@app.route('/t/search/tweets',  methods=['GET'])
def twit():
    results = twitter_api.GetSearch(count=count, term='hello world')
    return Response(json.dumps(results),  mimetype='application/json')

这是完整的引用

Traceback (most recent call last):
  File "/home/john/.virtualenvs/in5/lib/python2.7/site-packages/flask/app.py", line 1836, in __call__
    return self.wsgi_app(environ, start_response)
  File "/home/john/.virtualenvs/in5/lib/python2.7/site-packages/flask/app.py", line 1820, in wsgi_app
    response = self.make_response(self.handle_exception(e))
  File "/home/john/.virtualenvs/in5/lib/python2.7/site-packages/flask_cors/extension.py", line 110, in wrapped_function
    return cors_after_request(app.make_response(f(*args, **kwargs)))
  File "/home/john/.virtualenvs/in5/lib/python2.7/site-packages/flask/app.py", line 1403, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "/home/john/.virtualenvs/in5/lib/python2.7/site-packages/flask/app.py", line 1817, in wsgi_app
    response = self.full_dispatch_request()
  File "/home/john/.virtualenvs/in5/lib/python2.7/site-packages/flask/app.py", line 1477, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/home/john/.virtualenvs/in5/lib/python2.7/site-packages/flask_cors/extension.py", line 110, in wrapped_function
    return cors_after_request(app.make_response(f(*args, **kwargs)))
  File "/home/john/.virtualenvs/in5/lib/python2.7/site-packages/flask/app.py", line 1381, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/home/john/.virtualenvs/in5/lib/python2.7/site-packages/flask/app.py", line 1475, in full_dispatch_request
    rv = self.dispatch_request()
  File "/home/john/.virtualenvs/in5/lib/python2.7/site-packages/flask/app.py", line 1461, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/home/john/Scripts/Python/in5/views.py", line 73, in twit
    return Response(json.dumps(results),  mimetype='application/json')
  File "/usr/lib/python2.7/json/__init__.py", line 243, in dumps
    return _default_encoder.encode(obj)
  File "/usr/lib/python2.7/json/encoder.py", line 207, in encode
    chunks = self.iterencode(o, _one_shot=True)
  File "/usr/lib/python2.7/json/encoder.py", line 270, in iterencode
    return _iterencode(o, 0)
  File "/usr/lib/python2.7/json/encoder.py", line 184, in default
    raise TypeError(repr(o) + " is not JSON serializable")
TypeError: <twitter.status.Status object at 0x7fc3d3384390> is not JSON serializable

这里是 'print results'

[<twitter.status.Status object at 0x7ff1f3114f90>, <twitter.status.Status object at 0x7ff1f30c6050>, <twitter.status.Status object at 0x7ff1f30c6190>, <twitter.status.Status object at 0x7ff1f30c6310>, <twitter.status.Status object at 0x7ff1f30c6510>, <twitter.status.Status object at 0x7ff1f30c65d0>, <twitter.status.Status object at 0x7ff1f30c6690>, <twitter.status.Status object at 0x7ff1f30c67d0>, <twitter.status.Status object at 0x7ff1f30c69d0>, <twitter.status.Status object at 0x7ff1f30c6c10>, <twitter.status.Status object at 0x7ff1f30c6d90>, <twitter.status.Status object at 0x7ff1f30c6e50>, <twitter.status.Status object at 0x7ff1f30c90d0>, <twitter.status.Status object at 0x7ff1f30c91d0>, <twitter.status.Status object at 0x7ff1f30c9290>, <twitter.status.Status object at 0x7ff1f30c9410>, <twitter.status.Status object at 0x7ff1f30c95d0>, <twitter.status.Status object at 0x7ff1f30c9690>, <twitter.status.Status object at 0x7ff1f30c9750>, <twitter.status.Status object at 0x7ff1f30c9a10>, <twitter.status.Status object at 0x7ff1f30c9ad0>, <twitter.status.Status object at 0x7ff1f30c9c10>, <twitter.status.Status object at 0x7ff1f30c9dd0>, <twitter.status.Status object at 0x7ff1f30c9e90>, <twitter.status.Status object at 0x7ff1f30c9f90>, <twitter.status.Status object at 0x7ff1f30cf1d0>, <twitter.status.Status object at 0x7ff1f30cf290>, <twitter.status.Status object at 0x7ff1f30cf510>, <twitter.status.Status object at 0x7ff1f30cf5d0>, <twitter.status.Status object at 0x7ff1f30cf690>, <twitter.status.Status object at 0x7ff1f30cf810>, <twitter.status.Status object at 0x7ff1f30cf8d0>, <twitter.status.Status object at 0x7ff1f30cfa50>, <twitter.status.Status object at 0x7ff1f30cfc90>, <twitter.status.Status object at 0x7ff1f30cfed0>, <twitter.status.Status object at 0x7ff1f30cff90>, <twitter.status.Status object at 0x7ff1f30d6090>, <twitter.status.Status object at 0x7ff1f30d6210>, <twitter.status.Status object at 0x7ff1f30d6390>, <twitter.status.Status object at 0x7ff1f30d6590>, <twitter.status.Status object at 0x7ff1f30d66d0>, <twitter.status.Status object at 0x7ff1f30d6890>, <twitter.status.Status object at 0x7ff1f30d6990>, <twitter.status.Status object at 0x7ff1f30d6a10>, <twitter.status.Status object at 0x7ff1f30d6a90>, <twitter.status.Status object at 0x7ff1f30d6bd0>, <twitter.status.Status object at 0x7ff1f30d6c90>, <twitter.status.Status object at 0x7ff1f30d6e50>, <twitter.status.Status object at 0x7ff1f30dc050>, <twitter.status.Status object at 0x7ff1f30dc110>]

Answer 1

我不得不挖掘他们的源代码，结果发现你必须使用 AsDict()

json_results = [result.AsDict() for result in results]

好痛……

由于缺少文档，我强烈建议使用 tweepy 而不是此库。

Answer 2

显然 python-twitter 已经将 api 调用结果反序列化为自定义 twitter.status.Status 对象（或列表）。默认情况下，json.dump() 只知道基本类型（字符串、数字、列表和字典），因此您必须为其他任何内容提供自己的编码器，如此处解释：https://docs.python.org/2/library/json.html#encoders-and-decoders

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