2016-03-23 83 views
0

我正在使用API​​從網站請求數據。數據可以在here找到並粘貼到JSON Viewer。下面是我的代碼以及它返回的錯誤。我猜測這是一個快速修復,部分反映了這是我第一次使用urllib。TypeError從urllib解析JSON obj ipython

import pandas as pd 
import urllib 
import json 

api_key = '79bf8eb2ded72751cc7cda5fc625a7a7' 
url = 'http://maplight.org/services_open_api/map.bill_list_v1.json?apikey=79bf8eb2ded72751cc7cda5fc625a7a7&jurisdiction=us&session=110&include_organizations=1&has_organizations=1' 

json_obj = urllib.request.urlopen(url) 

data = json.load(json_obj) 

--------------------------------------------------------------------------- 
TypeError         Traceback (most recent call last) 
<ipython-input-21-85ab9af07320> in <module>() 
     8 json_obj = urllib.request.urlopen(url) 
     9 
---> 10 data = json.load(json_obj) 

/home/jayaramdas/anaconda3/lib/python3.5/json/__init__.py in load(fp, cls, object_hook, parse_float, parse_int, parse_constant, object_pairs_hook, **kw) 
    266   cls=cls, object_hook=object_hook, 
    267   parse_float=parse_float, parse_int=parse_int, 
--> 268   parse_constant=parse_constant, object_pairs_hook=object_pairs_hook, **kw) 
    269 
    270 

/home/jayaramdas/anaconda3/lib/python3.5/json/__init__.py in loads(s, encoding, cls, object_hook, parse_float, parse_int, parse_constant, object_pairs_hook, **kw) 
    310  if not isinstance(s, str): 
    311   raise TypeError('the JSON object must be str, not {!r}'.format(
--> 312        s.__class__.__name__)) 
    313  if s.startswith(u'\ufeff'): 
    314   raise JSONDecodeError("Unexpected UTF-8 BOM (decode using utf-8-sig)", 

TypeError: the JSON object must be str, not 'bytes' 

任何建議,意見,或其他問題的讚賞。

+1

它看起來要'str',不'bytes'。你有沒有嘗試'json.load(json_obj.decode('utf-8'))'? – mgilson

+0

謝謝您的建議!我剛剛嘗試了你的建議。我收到以下錯誤'AttributeError:'HTTPResponse'對象沒有屬性'編碼'' –

+1

糟糕...''json.loads(json_obj.read()。decode('utf-8'))'也許? – mgilson

回答

2

json.load不會猜測編碼,因此您通常需要.read返回對象的字節,然後通過使用.decode和適當的編解碼器將這些字節轉換爲字符串。例如:

data = json.loads(json_obj.read().decode('utf-8')) 

official documentation中有一個這樣的例子。

具體來說,它說:

Note that urlopen returns a bytes object. This is because there is no way for urlopen to automatically determine the encoding of the byte stream it receives from the http server. In general, a program will decode the returned bytes object to string once it determines or guesses the appropriate encoding.