[root@bart lib64]# vzpkgcache -f centos-4-x86_64-default
Creating cache for centos-4-x86_64-default OS template
There was a problem importing one of the Python modules
required to run yum. The error leading to this problem was:

   dynamic module does not define init function (initrpm)

Please install a package which provides this module, or
verify that the module is installed correctly.

It's possible that the above module doesn't match the
current version of Python, which is:
2.4.3 (#1, Mar 14 2007, 19:01:42) 
[GCC 4.1.1 20070105 (Red Hat 4.1.1-52)]

[root@bart python2.4]# rpm -q rpm-python
rpm-python-4.4.2-37.el5