Build a Python development environment on Mac OS X

Installation of pyenv virtualenv virtualenvwrapper

.bash

$ brew install pyenv pyenv-virtualenv pyenv-virtualenvwrapper

Add the following to .zshrc

.bash

$ vim .zshrc
export PYENV_ROOT="$HOME/.pyenv”
export PATH="$PYENV_ROOT/bin:$PATH"
eval "$(pyenv init -)”

export PYENV_VIRTUALENVWRAPPER_PREFER_PYVENV="true"
pyenv virtualenvwrapper

How to use pyenv

List of installable versions

.bash

$ pyenv install -l

Installation

.bash

$ pyenv install 3.4.1

Specifies the version used in the current shell

.bash

$ pyenv local 3.4.1

Specify the version to use by default

If not specified, system python will be used

.bash

$ pyenv global 3.4.1

When I open a new shell, it uses python set in global

.bash

$ python --version
Python 3.4.1

How to use mkvirtualenv

Environment creation

Contents of existing pip

.bash

$ pip list
argparse (1.2.2)
pbr (0.10.2)
pip (1.5.6)
setuptools (2.1)
six (1.8.0)
stevedore (1.1.0)
virtualenv (1.11.6)
virtualenv-clone (0.2.5)
virtualenvwrapper (4.3.1)

An environment is created with mkvirtualenv [environment name]

.bash

/Volumes/kobayashi/work% mkvirtualenv test
Using base prefix '/Users/kasei_san/.pyenv/versions/3.4.1'
New python executable in test/bin/python3.4
Also creating executable in test/bin/python
Installing setuptools, pip...done.

The environment name is displayed at the left end of the prompt (The contents of pip are cleared)

.bash

(test)/Volumes/kobayashi/work% pip list
pip (1.5.6)
setuptools (3.6)

Environment switching

.bash

$ workon testenv 

Environment list

.bash

$ workon 
test

Get out of the environment

.bash

$ deactivate

Delete environment

.bash

$ rmvirtualenv test

Move to the working directory after workon

Create an environment

.bash

$ mkvirtualenv playlist_to_mp3
Using base prefix '/Users/kasei_san/.pyenv/versions/3.4.1'
New python executable in playlist_to_mp3/bin/python3.4
Also creating executable in playlist_to_mp3/bin/python
Installing setuptools, pip...done.

Associate the current environment with the current directory with setvirtualenvproject

.bash

$ (playlist_to_mp3)/Users/kasei_san/Dropbox/work/playlist_to_mp3% setvirtualenvproject
Setting project for playlist_to_mp3 to /Users/kasei_san/Dropbox/work/playlist_to_mp3

Create an environment with a different version of python than global

.bash

$ pyenv local 2.7.9rc1
$ python --version
Python 2.7.9rc1

$ mkvirtualenv test

$ (test) python --version
Python 2.7.9rc1

Open a new shell

.bash

$ python --version
Python 3.4.1

$ workon test
$ (test) python --version
Python 2.7.9rc1

Confirm that the version changes

reference

• yyuu/pyenv -Unify Ruby and Python virtual environment operations --Qiita -Ansible --pyenv installation memo on OSX --Qiita -Put Python's virtualenv and virtualenvwrapper-Review of technical guys -Set up Pyenv on CentOS 6.3 (with super easy reference) --Qiita