Python's `urllib2`: Why do I get error 403 when I `urlopen` a Wikipedia page?

Question

I have a strange bug when trying to urlopen a certain page from Wikipedia. This is the page:

http://en.wikipedia.org/wiki/OpenCola_(drink)

This

Answer 1

To debug this, you'll need to trap that exception.

try:
    f = urllib2.urlopen('http://en.wikipedia.org/wiki/OpenCola_(drink)')
except urllib2.HTTPError, e:
    print e.fp.read()

When I print the resulting message, it includes the following

"English

Our servers are currently experiencing a technical problem. This is probably temporary and should be fixed soon. Please try again in a few minutes. "