upgrade python 2.4.3 to 2.5.5 in Centos 5.5 or 5.6

http://www.python.org/ftp/python/2.5.5/Python-2.5.5.tar.bz2

tar jxf Python-2.5.5.tar.bz2
cd Python-2.5.5
./configure
make
make test
make install