Preparing for the great snakes migration by Heather Williams

A Lightning Talk at PyCon ZA 2020

Transcript

1. Great snakes migration
   Upgrading from python 2 to python 3
   By Heather Williams
   

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2. The Problem
   ● A large codebase
   ● Around 3 000 python files used to generate questions on a website
   ● Monolith disguised as microservices
   

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3. Solution: Walled gardens
   ● Make the monolith a true monolith
   ● Identify the real microservices
   ● Docker all the things
   ● Walled garden around the python files for questions
   

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4. Solution: automate it
   Python 2to3 is a great tool
   https://docs.python.org/3.0/library/2to3.html
   

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5. Solution: requirements files
   ● Remove unnecessary dependencies
   ● Upgrade out of date dependencies
   ● Note what needs python 3 to upgrade
   

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6. Great snakes migration
   Take the plunge and do it!
   

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