Adrian Powell wrote:
I'm new to python and I'm trying to get a twitter client running on a new
machine but it keeps on failing. I tracked the problem down to an issue opening
URLs and wrote this little test case:
import urllib2
url = 'http://www.google.com/'
opener = urllib2.build_opener()
url_data = opener.open(url).read
url_data
When I run that on a dev machine it works fine, but when it's on one of our
servers it crashes:
import urllib2
url = 'http://www.google.com/'
opener = urllib2.build_opener()
url_data = opener.open(url).read
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/lib/python2.7/urllib2.py", line 391, in open
response = self._open(req, data)
File "/usr/lib/python2.7/urllib2.py", line 409, in _open
'_open', req)
File "/usr/lib/python2.7/urllib2.py", line 369, in _call_chain
result = func(*args)
File "/usr/lib/python2.7/urllib2.py", line 1173, in http_open
return self.do_open(httplib.HTTPConnection, req)
File "/usr/lib/python2.7/urllib2.py", line 1148, in do_open
raise URLError(err)
urllib2.URLError: <urlopen error [Errno -2] Name or service not known>
Our servers have the same version of python and we're running the same OS
(Fedora 14). Can anyone think of what might be causing this problem, or why it
works on most (but not all) machines?
Thanks
Actually, Python did not crashed, some module raised an exception and
nothing has been written to handle that exception, hence python
stopping. But as you can see, python gave you a lot of meaningful
informations about why it was not able to continue execution.
urllib2.URLError: <urlopen error [Errno -2] Name or service not known>
Your server may not be able to resolve that URL while your local dev
machine can.
JM
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