This is how I install python 2.7.13 without erasing the current version of python that exists inside the OS. It is an alternative install.
$ wget https://www.python.org/ftp/python/2.7.13/Python-2.7.13.tar.xz $ tar xvf Python-2.7.13.tar.xz
$ cd Python-2.7.13 $ ./configure $ make $ sudo make altinstall