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Michael Howitz

Michael Howitz

Software Developer


We Have Nearly One Million Lines of Python 2 Code in Production – and Now?

Friday,  Jun 19 | 01:00PM - 01:45PM US ET

Level: Intermediate


In this talk I am going to present possible approaches for a Python 3 migration of existing Python code running on Python 2.7. I’ll evaluate which of these approaches seems suitable for a large code base and which principles should be paid attention to to increase the probability of a successful migration project.

I’ll use union.cms (a content management system used by German trade unions) to show the story of a successful migration project involving nearly one million lines of Python code. The story will include the obstacles we encountered and what we learned on the way.

I believe that most of the discussed ideas and experience should also be used unchanged in smaller projects as the presented principles are very much the same.

Goal of the presentation: You should be able to come up with a plan for migrating your Python 2 based projects to Python 3.