2015-12-03 60 views
13

有一个似乎很常见的问题,但我已经完成了我的研究,并没有看到它在任何地方都被完全重新创建。当我打印json.loads(rety.text)时,我看到了我需要的输出。然而,当我打电话回来时,它向我显示了这个错误。有任何想法吗?非常感谢帮助,谢谢。我正在使用Flask MethodHandlerPython烧瓶,TypeError:'字典'对象不可调用

class MHandler(MethodView): 
    def get(self): 
     handle = '' 
     tweetnum = 100 

     consumer_token = '' 
     consumer_secret = '' 
     access_token = '-' 
     access_secret = '' 

     auth = tweepy.OAuthHandler(consumer_token,consumer_secret) 
     auth.set_access_token(access_token,access_secret) 

     api = tweepy.API(auth) 

     statuses = api.user_timeline(screen_name=handle, 
          count= tweetnum, 
          include_rts=False) 

     pi_content_items_array = map(convert_status_to_pi_content_item, statuses) 
     pi_content_items = { 'contentItems' : pi_content_items_array } 

     saveFile = open("static/public/text/en.txt",'a') 
     for s in pi_content_items_array: 
      stat = s['content'].encode('utf-8') 
      print stat 

      trat = ''.join(i for i in stat if ord(i)<128) 
      print trat 
      saveFile.write(trat.encode('utf-8')+'\n'+'\n') 

     try: 
      contentFile = open("static/public/text/en.txt", "r") 
      fr = contentFile.read() 
     except Exception as e: 
      print "ERROR: couldn't read text file: %s" % e 
     finally: 
      contentFile.close() 
     return lookup.get_template("newin.html").render(content=fr) 

    def post(self): 
     try: 
      contentFile = open("static/public/text/en.txt", "r") 
      fd = contentFile.read() 
     except Exception as e: 
      print "ERROR: couldn't read text file: %s" % e 
     finally: 
       contentFile.close() 
     rety = requests.post('https://gateway.watsonplatform.net/personality-insights/api/v2/profile', 
       auth=('---', ''), 
       headers = {"content-type": "text/plain"}, 
       data=fd 
      ) 

     print json.loads(rety.text) 
     return json.loads(rety.text) 


    user_view = MHandler.as_view('user_api') 
    app.add_url_rule('/results2', view_func=user_view, methods=['GET',]) 
    app.add_url_rule('/results2', view_func=user_view, methods=['POST',]) 

这里是回溯(记住结果上面印刷):

Traceback (most recent call last): 
    File "/Users/RZB/anaconda/lib/python2.7/site-packages/flask/app.py", line 1836, in __call__ 
    return self.wsgi_app(environ, start_response) 
    File "/Users/RZB/anaconda/lib/python2.7/site-packages/flask/app.py", line 1820, in wsgi_app 
    response = self.make_response(self.handle_exception(e)) 
    File "/Users/RZB/anaconda/lib/python2.7/site-packages/flask/app.py", line 1403, in handle_exception 
    reraise(exc_type, exc_value, tb) 
    File "/Users/RZB/anaconda/lib/python2.7/site-packages/flask/app.py", line 1817, in wsgi_app 
    response = self.full_dispatch_request() 
    File "/Users/RZB/anaconda/lib/python2.7/site-packages/flask/app.py", line 1478, in full_dispatch_request 
    response = self.make_response(rv) 
    File "/Users/RZB/anaconda/lib/python2.7/site-packages/flask/app.py", line 1577, in make_response 
    rv = self.response_class.force_type(rv, request.environ) 
    File "/Users/RZB/anaconda/lib/python2.7/site-packages/werkzeug/wrappers.py", line 841, in force_type 
    response = BaseResponse(*_run_wsgi_app(response, environ)) 
    File "/Users/RZB/anaconda/lib/python2.7/site-packages/werkzeug/test.py", line 867, in run_wsgi_app 
    app_rv = app(environ, start_response) 

回答

28

Flask only expects views to return a response-like object.这意味着Response,字符串或描述体,代码和标头的元组。你正在返回一个字典,这不是其中的一个。由于您要返回JSON,因此请返回正文中带有JSON字符串的响应,其内容类型为application/json

return app.response_class(rety.content, content_type='application/json') 

在你的榜样,你已经有一个JSON字符串,通过你的请求返回的内容。但是,如果你想要一个Python结构转换成JSON响应,使用jsonify

data = {'name': 'davidism'} 
return jsonify(data) 

在幕后,瓶是一个WSGI应用程序,它预计将绕过可调用的对象,这就是为什么你得到这个具体的错误:一个字典不可调用,Flask不知道如何将其转化为某种东西。

+0

谢谢davidism,这似乎减轻了错误。但是,现在我发现了一个新的错误,我认识到它可能与原始问题无关。这里的任何想法? {u'code':400,u'error':u'JSON输入在第1行第2列'} 127.0.0.1 - - [02/Dec/2015 23:39:34]“POST/results2 HTTP/1.1“200 - – puhtiprince

+0

@ puhtiprince这就是你提出的请求中的json,这是说你没有做对。你需要传递'json ='来发布,而不是'data ='。 – davidism

5

使用Flask.jsonify函数返回数据。

示例 - return jsonify(data)

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