Virtualenv
- 1. virtualenv, pip & virtualenvwrapper OR Saving your sanity while working with multiple python projects
- 2. Why Virtualize our Environments? Allows us to isolate our environments (Sandbox).
- 3. Decouples our development environment from our system.
- 4. You don't need sudo.
- 5. It's agile (buzzword compliant).
- 6. Easy to test different versions.
- 7. Getting virtualized Install setuptools if you don't already have easy_install. http://pypi.python.org/pypi/setuptools#installation-instructions Install pip, virtualenv, & virtualenvwrapper sudo easy_install pip
- 8. sudo pip install virtualenv
- 9. sudo pip install virtualenvwrapper
- 10. Edit $HOME/.bashrc and add the following line: source /usr/local/bin/virtualenvwrapper.sh
- 11. Setting up your first virtual environment It's really hard. mkvirtualenv first Not hard enough? mkvirtualenv –python=python2.7 –no-site-packages second That better?
- 12. Adding Libraries You add libraries with pip pip install boto
- 13. pip install -r requirements.txt
- 14. pip install -U django (upgrades)
- 15. pip install -e (repo path – See docs)
- 16. Working inside your virtualenv Within your environment you simply use the python on the path. $ type python python is /home/jnials/.virtualenvs/first/bin/python Lets not forget lssitepackages
- 17. Changing virtual environments You can turn on or switch between environments with 'workon': workon first
- 18. workon second You leave the virtual environment completely with 'deactivate' deactivate
- 19. Manipulating virtual environments List your virtual environments with: lsvirtualenv And then remove them with: rmvirtualenv first
- 20. Customizing virtual environments You can do it within virtualenv itself, but it is better to do it within virtualenvwrapper
- 21. Some environment variables you can set: WORKON_HOME, VIRTUALENVWRAPPER_HOOK_DIR, VIRTUALENV_USE_DISTRIBUTE $VIRTUALENVWRAPPER_HOOK_DIR holds a number of hook scripts that can be used to customize your virtual environments.
- 22. postmkvirtualenv #!/bin/bash # This hook is run after a new virtualenv is activated. toggleglobalsitepackages pip install ipython pip install unittest2 pip install pylint
- 23. The joys of pip pip is just better than easy_install
- 24. pip freeze can generate a requirements file that can be read by pip install -r
- 25. pip can search the python package index (PyPi)
- 26. Supports uninstallation of packages.
- 27. Supports git, hg, bzr.
- 28. Easier to type.
- 29. Neat Features & Plugins Templates Bitbucket – automatically clones a mercurial repo
- 30. Django – automatically creates a django project Extensions user_scripts – enables the customization features Religious Features Emacs-desktop – emacs support
- 31. Vim-virtualenv – vi support
- 32. Find out more virtualenv: http://pypi.python.org/pypi/virtualenv
- 35. Acknowledgements Some ideas drawn from: Introduction to pip, virtualenv & virtualenvwrapper by Eric Malloy @ A-team Solutions
- 37. Q & A Contact me at: [email_address]
- 39. License This work is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/3.0/ or send a letter to Creative Commons, 444 Castro Street, Suite 900, Mountain View, California, 94041, USA.