mod_python and xml.dom.minidom

[Daniel Fetchinson]

On 5/8/09, dpapathanasiou <denis.papathanasiou at gmail.com> wrote:
> I wrote a python script called xml_utils.py which parses xml using
> minidom.
>
> It works when it's run on its own, but when I try to import it and run
> it inside a mod_python handler, I get this error:
>
>   File "../common/xml_utils.py", line 80, in parse_item_attribute
>   File "/usr/lib/python2.5/xml/dom/minidom.py", line 1924, in
> parseString
>     from xml.dom import expatbuilder
> SystemError: Parent module 'xml.dom' not loaded
>
> Basically, it's the same problem I found in this post:
> http://mail.python.org/pipermail/python-list/2007-January/424018.html
>
> This site (http://www.dscpl.com.au/wiki/ModPython/Articles/
> ExpatCausingApacheCrash) goes through a detailed explanation, and I
> found that the version of pyexpat is newer than libexpat:
>
> # ldd /usr/local/apache2/bin/httpd | grep expat
> 	libexpat.so.0 => /usr/local/apache2/lib/libexpat.so.0 (0xb7f71000)
> # strings /usr/local/apache2/lib/libexpat.so.0 | grep expat_
> expat_1.95.2
>
> $ python
> Python 2.5.2 (r252:60911, Jan  4 2009, 17:40:26)
> [GCC 4.3.2] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
>>>> import pyexpat
>>>> pyexpat.version_info
> (2, 0, 0)
>
> But this is where I'm stuck: the article suggests recompiling apache
> with the newer version of expat.
>
> Apache's configure utility (I'm using httpd version 2.2.11) doesn't
> explicitly describe an expat library option.
>
> Also, if libexpat is version 1.95.2, wouldn't I have to get version
> 2.0 to be compatible with pyexpat?
>
> If anyone has any advice or suggestions, I'd appreciate hearing them.

My only advice is, don't use mod_python. The project is dead, you
should use mod_wsgi instead: http://code.google.com/p/modwsgi/

Cheers,
Daniel

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