Problem running a python script

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April 15th, 2008, 07:56 PM

Noodles23

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Problem running a python script

I'm a newbie at python, but I'm trying to run this script: http://www.mnot.net/cacheability/

I've got it setup as a cgi script and it executes, but I get this error:

Code:

Traceback (most recent call last):
  File "/var/www/apache2-default/cgi-bin/cacheability.py", line 902, in cgi_wrap
    cgi_main()
  File "/var/www/apache2-default/cgi-bin/cacheability.py", line 871, in cgi_main
    print "

      ", f, "

"
  File "/var/www/apache2-default/cgi-bin/cacheability.py", line 111, in __repr__
    p(" %s\n" % (
  File "/var/www/apache2-default/cgi-bin/httpheadertypes.py", line 280, in __getattr__
    return self.__dict__[attr]
KeyError: '__str__'

Does this mean anything to anyone? Is there a way I can trace this error and fix it?

TIA

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April 16th, 2008, 04:51 PM

c-2501

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Location: Scotland

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This seems to be caused by the scripts __getattr__ method attempting to return a value from the objects attribute dictionary that doesnt exist (the problem is __getattr__ is only called if the value doesnt exist in __dict__ in the first place, so why who ever wrote this thought that was a good idea is beyond me

)

anyway someone already posted the solution to this on the python mailing list, what you need to do is access the file httpheadertypes.py and find the Dict.__getattr__ method override and replace it with the following

Python Code:

Original - Python Code
def __getattr__(self, attr): if attr.startswith('__') and attr.endswith('__'): raise AttributeError(attr) attr = lower(replace(attr, '_', '-')) return self.data[attr]

    def __getattr__(self, attr):
        if attr.startswith('__') and attr.endswith('__'):
            raise AttributeError(attr)
        attr = lower(replace(attr, '_', '-'))
        return self.data[attr]

I've given this a quick test(far from extensive) and it seems to work now.

Hope this helps.

You can find the original mailing list entry about this problem here:

http://starship.python.net/pipermai...005/000484.html

Comments on this post

Noodles23 agrees!

Last edited by c-2501 : April 16th, 2008 at 05:02 PM. Reason: found better version of method edit

April 16th, 2008, 05:29 PM

Noodles23

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Join Date: Jun 2004

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Thank you so much, I searched everywhere for a solution to this problem. Not knowing python made it a bit harder to sort out.

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