#python environment manager

I had previously posted about using pyenv and also had mentioned using virtualenv in combination to setup my development environment.  I had install virtualenv via pip.

pip install virtualenv

Restart my terminal to reload my environment to use virtualenv.  Then, I create a new project with virtualenv

virtualenv mycoolproject

Next, I need to switch to mycoolproject and setup my python environment to work specifically in that folder:

cd mycoolproject source bin/activate

And you can now switch to different pythons within your project directory using:

virtualenv -p [path_to_other_pythons]/python_version

Replacing path to other pythons and python_version.  Now you can install things like:

pyenv - Simple Python version management

I haven't posted much about python lately, and since I didn't see much about using pyenv, I thought I'd post my thoughts on it.  The project 'pyenv' is a version manager for python -- which I use in combination with virtualenv whenever I start a new project and want to setup my development environment.  It replaces pythonbrew, which had stopped being an active project almost 8 months ago.  Anyhow, pyenv works a lot like rbenv, which installs the binaries and uses 'shims' to access the different versions of python.

So why do I use something like pyenv?  Well, I don't like polluting my system with extra 

Look at the link for more details, but this is how I install on a fresh laptop.

I clone the repo to my home:

git clone git://github.com/yyuu/pyenv.git ~/.pyenv

On my terminal, I edit my .bash_profile or .bashrc and add:

if [ -d "$HOME/.pyenv" ] ; then PATH="$HOME/.pyenv/bin:$PATH" eval "$(pyenv init -)" fi

Then I just re-source my bash profile, or restart the terminal, and then check if I get a response from:

pyenv --version

I can install a python version:

pyenv install 2.7.6 3.3.5

Then, just rebuild the shims, by using rehash:

pyenv rehash pyenv versions

And by using the versions, you can see the python versions you have installed including the system python if you had python installed previously. By default, I am still using the system python, but I can switch to the 3.3.5 version by doing:

pyenv global 3.3.5

I have started watching this project because I always wanted a nice installer for Python similar to Ruby's rvm or rbenv, and Perl's perlbrew -- yes it has virtualenv, once you have installed Python and have it ready for work.