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Doug Hellmann PyATL 8 April 2010 Better Development Workflows with virtualenvwrapper Tuesday, September 27, 2011

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In the beginning... • Install Python • Install dependencies • Write software • Package • Release • Get rich! Tuesday, September 27, 2011

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...and then • New project! • Upgrade dependencies • Write software • Package • Release • Get richer! Tuesday, September 27, 2011

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But... • A Bug in Project 1! • Project 1 no longer runs!! • Conflict!!! Tuesday, September 27, 2011

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What’s a Developer to Do? Don’t panic! Tuesday, September 27, 2011

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Downgrade? Error prone. Tuesday, September 27, 2011

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Buy another Computer? Pricy Tuesday, September 27, 2011

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Use a Virtual Machine? Overkill Tuesday, September 27, 2011

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virtualenv Just right! Tuesday, September 27, 2011

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Benefits of virtualenv Simplicity Tuesday, September 27, 2011

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Benefits of virtualenv Compatibility Tuesday, September 27, 2011

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Benefits of virtualenv Be yourself Tuesday, September 27, 2011

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Benefits of virtualenv Make as many as you want Tuesday, September 27, 2011

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Benefits of virtualenv Isolation Tuesday, September 27, 2011

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Demonstration: virtualenv Tuesday, September 27, 2011

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Messy Shortcomings of virtualenv Tuesday, September 27, 2011

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Still manual Shortcomings of virtualenv Tuesday, September 27, 2011

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virtualenvwrapper Add another layer Tuesday, September 27, 2011

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Organization Benefits of virtualenvwrapper Tuesday, September 27, 2011

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Automation Benefits of virtualenvwrapper Tuesday, September 27, 2011

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Demonstration: virtualenvwrapper Tuesday, September 27, 2011

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Favorite Features "My favorite thing about using virtualenvwrapper is how it attracts the babes.” - Danny Greenfeld “After just the general organizational nirvana that can be reached w/ the core stuff, the hooks are the best.” - Paul McLanahan Tuesday, September 27, 2011

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Automation Hooks • create • activate • deactivate • delete Tuesday, September 27, 2011

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post-create Initialize Tuesday, September 27, 2011

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Switch working configuration post-activate Tuesday, September 27, 2011

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Demonstration: Hooks Tuesday, September 27, 2011

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References • Ian Bicking’s virtualenv • http://pypi.python.org/pypi/virtualenv • virtualenvwrapper • http://www.doughellmann.com/projects/virtualenvwrapper/ Tuesday, September 27, 2011