Install Python on CentOS using pyenv

0. Environment

CentOS6.7

1. Install what you think you need

$ sudo yum groupinstall "Development tools"
$ sudo yum install gcc zlib-devel bzip2-devel openssl-devel readline-devel ncurses-devel sqlite-devel gdbm-devel db4-devel expat-devel libpcap-devel xz-devel pcre-devel

2. Install pyenv

$ git clone https://github.com/yyuu/pyenv.git ~/.pyenv
$ echo 'export PYENV_ROOT="$HOME/.pyenv"' >> ~/.bash_profile
$ echo 'export PATH="$PYENV_ROOT/bin:$PATH"' >> ~/.bash_profile
$ echo 'eval "$(pyenv init -)"' >> ~/.bash_profile
$ exec $SHELL

2.1 Try to run it.

$ pyenv
pyenv 20151006-3-g1550129
Usage: pyenv <command> [<args>]

Some useful pyenv commands are:
   commands    List all available pyenv commands
   local       Set or show the local application-specific Python version
   global      Set or show the global Python version
   shell       Set or show the shell-specific Python version
   install     Install a Python version using python-build
   uninstall   Uninstall a specific Python version
   rehash      Rehash pyenv shims (run this after installing executables)
   version     Show the current Python version and its origin
   versions    List all Python versions available to pyenv
   which       Display the full path to an executable
   whence      List all Python versions that contain the given executable

See `pyenv help <command>' for information on a specific command.
For full documentation, see: https://github.com/yyuu/pyenv#readme

Ran.

2.2 Check the version that can be installed.

$ pyenv install --list
Available versions:
  2.1.3
  2.2.3
  2.3.7
  2.4
  2.4.1
  2.4.2
  2.4.3
  2.4.4
  2.4.5
  2.4.6
  2.5
  2.5.1
  2.5.2
  2.5.3
  2.5.4
  2.5.5
  2.5.6
  2.6.6
  2.6.7
  2.6.8
  2.6.9
  2.7-dev
  2.7
  2.7.1
  2.7.2
  2.7.3
  2.7.4
  2.7.5
  2.7.6
  2.7.7
  2.7.8
  2.7.9
  2.7.10
  3.0.1
  3.1
  3.1.1
  3.1.2
  3.1.3
  3.1.4
  3.1.5
  3.2-dev
  3.2
  3.2.1
  3.2.2
  3.2.3
  3.2.4
  3.2.5
  3.2.6
  3.3.0
  3.3-dev
  3.3.1
  3.3.2
  3.3.3
  3.3.4
  3.3.5
  3.3.6
  3.4.0
  3.4-dev
  3.4.1
  3.4.2
  3.4.3
  3.5.0
  3.5-dev
  3.6-dev
  anaconda-1.4.0
  anaconda-1.5.0
  anaconda-1.5.1
  anaconda-1.6.0
  anaconda-1.6.1
  anaconda-1.7.0
  anaconda-1.8.0
  anaconda-1.9.0
  anaconda-1.9.1
  anaconda-1.9.2
  anaconda-2.0.0
  anaconda-2.0.1
  anaconda-2.1.0
  anaconda-2.2.0
  anaconda-2.3.0
  anaconda3-2.0.0
  anaconda3-2.0.1
  anaconda3-2.1.0
  anaconda3-2.2.0
  anaconda3-2.3.0
  ironpython-dev
  ironpython-2.7.4
  ironpython-2.7.5
  jython-dev
  jython-2.5.0
  jython-2.5-dev
  jython-2.5.1
  jython-2.5.2
  jython-2.5.3
  jython-2.5.4-rc1
  jython-2.7.0
  jython-2.7.1b1
  jython-2.7.1b2
  miniconda-2.2.2
  miniconda-3.0.0
  miniconda-3.0.4
  miniconda-3.0.5
  miniconda-3.3.0
  miniconda-3.4.2
  miniconda-3.7.0
  miniconda-3.8.3
  miniconda-3.9.1
  miniconda-3.10.1
  miniconda-3.16.0
  miniconda3-2.2.2
  miniconda3-3.0.0
  miniconda3-3.0.4
  miniconda3-3.0.5
  miniconda3-3.3.0
  miniconda3-3.4.2
  miniconda3-3.7.0
  miniconda3-3.8.3
  miniconda3-3.9.1
  miniconda3-3.10.1
  miniconda3-3.16.0
  pypy-c-jit-latest
  pypy-c-nojit-latest
  pypy-dev
  pypy-stm-2.3
  pypy-portable-2.3.1
  pypy-portable-2.4
  pypy-portable-2.5
  pypy-portable-2.5.1
  pypy-stm-2.5.1
  pypy-portable-2.6.0
  pypy-portable-2.6.1
  pypy-1.5-src
  pypy-1.5
  pypy-1.6
  pypy-1.7-dev
  pypy-1.7
  pypy-1.8-dev
  pypy-1.8
  pypy-1.9-dev
  pypy-1.9
  pypy-2.0-dev
  pypy-2.0-src
  pypy-2.0
  pypy-2.0.1-src
  pypy-2.0.1
  pypy-2.0.2-src
  pypy-2.0.2
  pypy-2.1-src
  pypy-2.1
  pypy-2.2-src
  pypy-2.2
  pypy-2.2.1-src
  pypy-2.2.1
  pypy-2.3-src
  pypy-2.3
  pypy-2.3.1-src
  pypy-2.3.1
  pypy-2.4.0-src
  pypy-2.4.0
  pypy-2.4-beta1-src
  pypy-2.4-beta1
  pypy-2.5.0-src
  pypy-2.5.0
  pypy-2.5.1-src
  pypy-2.5.1
  pypy-2.6.0-src
  pypy-2.6.0
  pypy-2.6.1-src
  pypy-2.6.1
  pypy3-dev
  pypy3-portable-2.3.1
  pypy3-portable-2.4
  pypy3-2.3.1-src
  pypy3-2.3.1
  pypy3-2.4.0-src
  pypy3-2.4.0
  stackless-dev
  stackless-2.7-dev
  stackless-2.7.2
  stackless-2.7.3
  stackless-2.7.4
  stackless-2.7.5
  stackless-2.7.6
  stackless-2.7.7
  stackless-2.7.8
  stackless-3.2-dev
  stackless-3.2.2
  stackless-3.2.5
  stackless-3.3-dev
  stackless-3.3.5
  stackless-3.4.1

2.3 Install "2.7.10" and "3.5.0".

$ pyenv install 2.7.10
Downloading Python-2.7.10.tgz...
-> https://yyuu.github.io/pythons/eda8ce6eec03e74991abb5384170e7c65fcd7522e409b8e83d7e6372add0f12a
Installing Python-2.7.10...
patching file ./Lib/site.py
Installed Python-2.7.10 to ~/.pyenv/versions/2.7.10

$ pyenv install 3.5.0
Downloading Python-3.5.0.tgz...
-> https://yyuu.github.io/pythons/584e3d5a02692ca52fce505e68ecd77248a6f2c99adf9db144a39087336b0fe0
Installing Python-3.5.0...
Installed Python-3.5.0 to ~/.pyenv/versions/3.5.0

$ pyenv rehash

2.4 Check the installed version.

$ pyenv versions
* system (set by ~/.pyenv/version)
  2.7.10
  3.5.0

$ pyenv global 2.7.10
$ python
Python 2.7.10 (default, Oct 28 2015, 11:37:48) 
[GCC 4.4.7 20120313 (Red Hat 4.4.7-16)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> exit()

2.5 Switch versions

$ pyenv global 3.5.0
$ python
Python 3.5.0 (default, Oct 28 2015, 11:40:43) 
[GCC 4.4.7 20120313 (Red Hat 4.4.7-16)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> exit()