The following errata for CentOS-2 have been built and uploaded to the centos mirror:

RHSA-2007:1077-01 Moderate: python security update

Files available:
python-1.5.2-43.72.2.i386.rpm
python-devel-1.5.2-43.72.2.i386.rpm
python-docs-1.5.2-43.72.2.i386.rpm
python-tools-1.5.2-43.72.2.i386.rpm
tkinter-1.5.2-43.72.2.i386.rpm

More details are available from the RedHat web site at
https://rhn.redhat.com/errata/rh21as-errata.html

The easy way to make sure you are up to date with all the latest patches is to run:
# yum update