Python environments

PythonEnvironments! Epically winning at Python! Glen Zangirolami Twitter @glenbot http://theglenbot.comPrepared for the 100th PyHou meetup.

Environments! Porque?

Environments! Porque?Isolation - Python packages and even versions live intheir own little $HOME!

Environments! Porque?Isolation - Python packages and even versions live intheir own little $HOME!Permissions - Not everyone is 1337 and can be a sudoer.

Environments! Porque?Isolation - Python packages and even versions live intheir own little $HOME!Permissions - Not everyone is 1337 and can be a sudoer.Organization - each project can maintain it’s ownrequirements ﬁle of python packages and you don’thave version overlap.

Environments! Porque?Isolation - Python packages and even versions live intheir own little $HOME!Permissions - Not everyone is 1337 and can be a sudoer.Organization - each project can maintain it’s ownrequirements ﬁle of python packages and you don’thave version overlap.Anti-globalization - installing stuff to the systemglobally is generally not a good idea, unless it’ssomething like PIP.

Ok ﬁne. But how?

Ok ﬁne. But how?virtualenv http://pypi.python.org/pypi/virtualenvvirtualenvwrapper http://www.doughellmann.com/projects/ virtualenvwrapper/pythonbrew https://github.com/utahta/pythonbrew

virtualenv

virtualenv$ easy_install pip$ pip install virtualenv$ virtualenv <ENV>

virtualenv$ easy_install pip$ pip install virtualenv$ virtualenv <ENV>This creates a folder <ENV> in the $PWD.<ENV>/lib/pythonX.X/site-packages

virtualenvwrapper

virtualenvwrapper$ pip install virtualenvwrapper

virtualenvwrapper$ pip install virtualenvwrapperSome simple environment vars need to go into .bashrcexport WORKON_HOME=$HOME/.virtualenvsource /usr/local/bin/virtualenvwrapper.shexport PIP_VIRTUALENV_BASE=$WORKON_HOMEexport PIP_RESPECT_VIRTUALENV=true

virtualenvwrapper $ pip install virtualenvwrapper Some simple environment vars need to go into .bashrc export WORKON_HOME=$HOME/.virtualenv source /usr/local/bin/virtualenvwrapper.sh export PIP_VIRTUALENV_BASE=$WORKON_HOME export PIP_RESPECT_VIRTUALENV=trueThe last package that you should ever install globally

virtualenv + virtualenvwrapper =

virtualenv + virtualenvwrapper = Can you guess it?

1up - pythonbrew

1up - pythonbrew$ curl -kL http://xrl.us/pythonbrewinstall | bash

1up - pythonbrew$ curl -kL http://xrl.us/pythonbrewinstall | bashSome simple code needs to go into .bashrc[[ -s $HOME/.pythonbrew/etc/bashrc ]] && source$HOME/.pythonbrew/etc/bashrc

virtualenv + virtualenvwrapper + pythonbrew =

virtualenv + virtualenvwrapper + pythonbrew = Can you guess it?

Using virtualenvwrapper$ mkvirtualenv python-rules$ workon python-rules$ pip install pygett$ deactivate$ cdsitepackages$ lssitepackages$ rmvirtualenv python-rules

Using pythonbrew$ pybrew list$ pybrew install --force 2.7.2$ pybrew switch 2.7.2$ pybrew install --force 2.4.6$ pybrew switch 2.4.6$ pybrew venv create -p 2.7.2 python-rules$ pybrew off$ pybrew py awesome_script.py

Holy grail ofpythonbrew

Holy grail ofpythonbrewAre you ready for this?

Holy grail of pythonbrew Are you ready for this?Ok, maybe it’s not THAT epic ;)

Holy grail of pythonbrew Are you ready for this? Ok, maybe it’s not THAT epic ;)$ pybrew py awesome_script.py

Holy grail of pythonbrew Are you ready for this? Ok, maybe it’s not THAT epic ;) $ pybrew py awesome_script.pyWhat does this do?!?! It tests your python script against all python versions! EPIC!

Let’s reiterate

Let’s reiteratevirtualenv & virtualenvwrapper allow you tocreate environments and manage them withthe default system Python.

Let’s reiteratevirtualenv & virtualenvwrapper allow you tocreate environments and manage them withthe default system Python.pybrew is like virtualenv & virtualenvwrapperhad babies with a BRAWNDO ENERGYDRINK! WIN AT PYTHON!

The EPIC end. Thanks for listening.I’m Glen Zangirolami and I love developing EPIC Python projects that WIN. Twitter @glenbot http://theglenbot.com

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Python environments

by Glen Zangirolami on Feb 15, 2012

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Python environments — Presentation Transcript