Python 2 6
We have a shell script that you can just source allowing you to use the default Python26 coming with CMSSW5xy
So after copying it just run:
source ./move_to_python26.sh
Then you should have:
[foobar@m2 ~]$ which python /sandbox/cmss/slc5_amd64_gcc434/cms/cmssw-patch/CMSSW_5_0_1_patch3/external/slc5_amd64_gcc434/bin/python [foobar@m2 ~]$ python -V Python 2.6.4