[CentOS] yum and python. grief and grief. CentOS 4.3

Hello.

Maybe after work with FreeBSD I become too spoilt, but I expect that
packages from one distribution kit works among themselves well. But
that I see:

$ rpm -qa | grep rpm

rpm-libs-4.3.13_nonptl
rpm-python-4.3.13_nonptl
rpm-4.3.13_nonptl
rpm-build-4.3.13_nonptl

$python
>>> import rpm
ImportError /usr/lib/librpm-4.3.so: undefined symbol: rpm_execcon

Thanks.