Astan Chee wrote:
> I have a python script which runs perfectly on my machine.
> However a machine that I tested it on gives the following error
> message:
>
> Traceback (most recent call last):
> File "whip.py", line 616, in OnRebootRunning
> File "whip.py", line 626, in RebootCustom
> File "urllib.pyc", line 77, in urlopen
> File "urllib.pyc", line 170, in open
> TypeError: cannot concatenate 'str' and 'NoneType' objects
>
> The code snipplet where this error
> happens is
> f = urllib.urlopen("http://www.hotmail.com/)
> notes= f.readlines()
>
> Does anyone know what causes this error? Im perplexed because it works
> on some machines and it doesnt work on other computers although they all
> have the same spec.
assuming you're using Python 2.4, the relevant portion of urllib.py
looks like this:
urltype, url = splittype(fullurl)
if not urltype:
urltype = 'file'
if urltype in self.proxies:
proxy = self.proxies[urltype]
urltype, proxyhost = splittype(proxy)
host, selector = splithost(proxyhost)
url = (host, fullurl) # Signal special case to open_*()
else:
proxy = None
name = 'open_' + urltype # <-- this is line 170
the error message indicates that urltype is None when you get to
line 170, and the only way it can get set to None is a bogus proxy
setting (causing splittype to fail).
checking the environment for things that end with "_proxy" should
help.
</F>
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