1、How would I build python myself from source code on Ubuntu?
1).At a shell prompt (in a terminal), run
sudo apt-get install build-essential
This will fetch all the common packages you need to build anything (e.g. the compiler etc.).
sudo apt-get build-dep python2.7
This will fetch all the libraries you need to build python.
3).Then download the source code for python and decompress it into a directory.
4).go there and run
5).Then make and then make install to get it built and installed:
make && make install
2、Upgrading Python (or any package)
$ sudo apt-get update
$ sudo apt-get upgrade python