# python
Python 2.4.4 (#1, Sep 18 2007, 01:15:16) 
[GCC 4.1.2 20070626 (Red Hat 4.1.2-13)] on linux2
Type "help", "copyright", "credits" or
"license" for more information.
>>> import yum
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "/usr/lib/python2.4/site-packages/yum/__init__.py", line 35,
in ?
    import comps
  File "/usr/lib/python2.4/site-packages/yum/comps.py", line 18, in ?
    from cElementTree import iterparse
ImportError: /usr/lib/python2.4/site-packages/cElementTree.so: undefined
symbol: PyUnicodeUCS4_Decode