root@hera:/usr/src# vzyum 1000 update
exec /usr/share/vzyum/bin/yum -c /vz/template/fedora-core/4/i386/config/yum.conf --installroot /vz/root/1000 --vps=1000 update
There was a problem importing one of the Python modules
required to run yum. The error leading to this problem was:

   No module named cElementTree

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:
2.4.1 (#1, Apr 10 2005, 22:30:36)
[GCC 3.3.5]

If you cannot solve this problem yourself, please send this
message to <yum@lists.linux.duke.edu>.