python-此错误的例外情况是：httperror_seek_wrapper：HTTP错误404：找不到？

我想处理错误：

“ httperror_seek_wrapper：HTTP错误404：未找到”

而是只返回一个空字符串.但是我不确定except语句应该是什么.如果出现重复的帖子,我深表歉意,但是弹出的所有帖子似乎都没有处理该错误,而是在更深层次上弄清楚出了什么问题.但是,我只想传递并返回一个空字符串.

基本上,我正在寻找空白内容：

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

谢谢！

_____

这是引发错误的代码.

---------------------------------------------------------------------------
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

解决方法:

那是一个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,在该处捕获了相同的异常并将其分配给响应,以便稍后重新引发.

标签：error-handling,python
来源： https://codeday.me/bug/20191122/2059437.html