此错误的例外是什么: httperror_seek_wrapper: HTTP错误404:未找到？

Question

我想要处理这个错误：

"httperror_seek_wrapper: HTTP错误404:未找到“

而只是返回一个空字符串。但是我不确定except语句应该是什么。如果有重复的帖子，我很抱歉，但弹出的帖子中似乎没有一个处理除了这个错误之外的问题，而是在更深层次上找出哪里出了问题。然而，我只想传递并返回一个空字符串。

基本上，我在寻找应该放在空白中的东西：

try:
     ....
except _____:
     ....

谢谢!

_____

下面是抛出错误的代码。

---------------------------------------------------------------------------
httperror_seek_wrapper                    Traceback (most recent call last)
<ipython-input-181-e2b68bf19ff9> in <module>()
      5 
      6 for i in range(len(first)):
----> 7     student_html = get_stud_html(first[i],last[i],'Sophomore')
      8 #     print type(student_html)
      9 #     print parse_hfb_page(student_html)

<ipython-input-177-9b1d4294820d> in get_stud_html(first, last, year)
     60     #ideally will want to use a regex to do this in case there's more than one link on the page
     61     stud_url = 'http://facebook.college.harvard.edu/'+links_lst[12]
---> 62     stud_html = br.open(stud_url)
     63     return stud_html.get_data()
     64 

//anaconda/python.app/Contents/lib/python2.7/site-packages/mechanize-0.2.5-py2.7.egg/mechanize/_mechanize.pyc in open(self, url, data, timeout)
    201     def open(self, url, data=None,
    202              timeout=_sockettimeout._GLOBAL_DEFAULT_TIMEOUT):
--> 203         return self._mech_open(url, data, timeout=timeout)
    204 
    205     def _mech_open(self, url, data=None, update_history=True, visit=None,

//anaconda/python.app/Contents/lib/python2.7/site-packages/mechanize-0.2.5-py2.7.egg/mechanize/_mechanize.pyc in _mech_open(self, url, data, update_history, visit, timeout)
    253 
    254         if not success:
--> 255             raise response
    256         return response
    257 

httperror_seek_wrapper: HTTP Error 404: Not Found

Answer 1

这是一个urllib2.HTTPError异常。

from urllib2 import HTTPError

try:
    # ...
except HTTPError:
    # ...

您可以在source of _mechanize.py中看到这一点，其中捕获了相同的异常并将其分配给response，以便稍后重新引发。