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