Managing Python libraries across git projects
March 01, 2011
I finally got around to
nuking from orbit cleaning up
my virtual machine. Maybe this time around I can make it a whole year
without wrecking all the permissions on $HOME (I once had to
sudo ls…no joke).
I know that all good Python comrades should be using
pip for installing
virtualenv for managing them per project, but I never
really got into the latter. I was pretty lazy and just shoved everything
into the global
site-packages, but since I had a fresh start I decided
to do it The Right Way™ this time.
And man, is it awesome!
There is a sweet wrapper for
virtualenv that I didn’t find (exist?)
last time I tried to get this setup working.
it less painful to manage multiple environments and has a super neat
And then I found a handy bash script to automatically switch your
environments when you
cd to a git repo.
Here is my new workflow:
[email protected]:~$ mkvirtualenv foo-project [email protected]:~$ mkdir projects/foo-project/ && cd projects/foo-project/ (foo-project)[email protected]:~/projects/foo-project$ git init (foo-project)[email protected]:~/projects/foo-project$ pip install flask
Flask is only installed into this environment, if you open a
inside foo-project you can import the module, but if you
cd out to $HOME
and try you will get an ImportError.
pip freeze > requirements.txt
Now you can enumerate the project dependancies (including versions) so that when someone clones the project they can install them all in one-go.
Once you leave the repository folder, your environment is automatically
deactivated. Then, when you go to work on
foo-project again – it will
be reactivated when you
It’s pretty slick. If you want more info, check out: