I have ubuntu 10.04 with python2.6 by default. I have installed python2.7.
When I want to install python packages with
apt-get python-
ubuntu 10.04 doesn't have a python2.7 package. You have to build 2.7 yourself. I did read an article about ubuntu releasing a python2.7 package when 12.04 came out but i'm not sure what the repository location is.
http://eli.thegreenplace.net/2011/10/10/installing-python-2-7-on-ubuntu/
or:
sudo add-apt-repository ppa:fkrull/deadsnakes
sudo apt-get update
sudo apt-get install python2.7
https://askubuntu.com/questions/101591/install-python-2-7-2-on-ubuntu-10-04-64-bit
this question has lots of answers online.