generic exception: Traceback (most recent call last): File "check_url_redirect.cgi", line 12, in <module> response = urllib.request.urlopen(req) File "/usr/lib/python3.5/urllib/request.py", line 163, in urlopen return opener.open(url, data, timeout) File "/usr/lib/python3.5/urllib/request.py", line 472, in open response = meth(req, response) File "/usr/lib/python3.5/urllib/request.py", line 582, in http_response 'http', request, response, code, msg, hdrs) File "/usr/lib/python3.5/urllib/request.py", line 510, in error return self._call_chain(*args) File "/usr/lib/python3.5/urllib/request.py", line 444, in _call_chain result = func(*args) File "/usr/lib/python3.5/urllib/request.py", line 590, in http_error_default raise HTTPError(req.full_url, code, msg, hdrs, fp) urllib.error.HTTPError: HTTP Error 404: Not Found