python之PRAW:get_submission 工作不一致

该脚本从 Reddit 上的特定评论中获取信息。 它的工作与否取决于给它的永久链接。

import praw 
from pprint import pprint 
clipboard = ['permalink'] 
com = r.get_submission(clipboard).comments[0] 
pprint(vars(com)) 

此固定链接有效:http://www.reddit.com/r/redditgetsdrawn/comments/1tvjmr/i_got_a_new_job_recently_and_would_love_to_have/cec9wh4

这个没有:http://www.reddit.com/r/redditgetsdrawn/comments/1ts9hi/surprise_me_thanks_in_advance/cec0897?context=3

我觉得以 ?context=3 或其他不寻常结尾结尾的永久链接具有搞砸 .get_submission 的特殊特征。

这是错误报告:

Traceback (most recent call last): 
  File "C:\Users\Aymeric\Python33\Scripts\brdg\brdg.py", line 14, in <module> 
    com = r.get_submission(clipboard).comments[0] 
  File "C:\Users\Aymeric\Python33\lib\site-packages\praw\__init__.py", line 875, in get_submission 
    comment_sort=comment_sort) 
  File "C:\Users\Aymeric\Python33\lib\site-packages\praw\decorators.py", line 320, in wrapped 
    return function(cls, *args, **kwargs) 
  File "C:\Users\Aymeric\Python33\lib\site-packages\praw\objects.py", line 837, in from_url 
    s_info, c_info = reddit_session.request_json(url, params=params) 
  File "C:\Users\Aymeric\Python33\lib\site-packages\praw\decorators.py", line 158, in wrapped 
    return_value = function(reddit_session, *args, **kwargs) 
  File "C:\Users\Aymeric\Python33\lib\site-packages\praw\__init__.py", line 476, in request_json 
    response = self._request(url, params, data) 
  File "C:\Users\Aymeric\Python33\lib\site-packages\praw\__init__.py", line 338, in _request 
    cache_key = (normalize_url(request.url), tuple(key_items)) 
  File "C:\Users\Aymeric\Python33\lib\site-packages\praw\helpers.py", line 140, in normalize_url 
    if url.endswith('.json'): 
AttributeError: 'list' object has no attribute 'endswith' 

编辑:这是我将列表更改为字符串时得到的结果:

Traceback (most recent call last): 
  File "C:\Users\Aymeric\Python33\lib\json\decoder.py", line 368, in raw_decode 
    obj, end = self.scan_once(s, idx) 
StopIteration 
 
During handling of the above exception, another exception occurred: 
 
Traceback (most recent call last): 
  File "C:\Users\Aymeric\Python33\Scripts\brdg\brdg.py", line 14, in <module> 
    com = r.get_submission(clipboard).comments[0] 
  File "C:\Users\Aymeric\Python33\lib\site-packages\praw\__init__.py", line 875, in get_submission 
    comment_sort=comment_sort) 
  File "C:\Users\Aymeric\Python33\lib\site-packages\praw\decorators.py", line 320, in wrapped 
    return function(cls, *args, **kwargs) 
  File "C:\Users\Aymeric\Python33\lib\site-packages\praw\objects.py", line 837, in from_url 
    s_info, c_info = reddit_session.request_json(url, params=params) 
  File "C:\Users\Aymeric\Python33\lib\site-packages\praw\decorators.py", line 158, in wrapped 
    return_value = function(reddit_session, *args, **kwargs) 
  File "C:\Users\Aymeric\Python33\lib\site-packages\praw\__init__.py", line 483, in request_json 
    data = json.loads(response, object_hook=hook) 
  File "C:\Users\Aymeric\Python33\lib\json\__init__.py", line 332, in loads 
    return cls(**kw).decode(s) 
  File "C:\Users\Aymeric\Python33\lib\json\decoder.py", line 352, in decode 
    obj, end = self.raw_decode(s, idx=_w(s, 0).end()) 
  File "C:\Users\Aymeric\Python33\lib\json\decoder.py", line 370, in raw_decode 
    raise ValueError("No JSON object could be decoded") 
ValueError: No JSON object could be decoded 

Edit2:如果我删除 ?context=3 并将列表更改为字符串，它现在可以正常工作。显然，无论如何它都不能作为列表使用(我记性不好!)，?context=3 似乎是问题所在。

请您参考如下方法:

?context=3 你是对的，答案很简单，PRAW 在你提问时不支持 url 参数。它现在适用于 PRAW 2.1.13 或更高版本。使用 pip install praw -U 升级您的 PRAW 版本。

您认为 get_submission 将列表作为参数，可能是因为将它与 get_submissions 混淆了方法，它确实将可迭代对象作为参数。