At some point, you've probably migrated an app from one framework or major runtime version to another.

For example, Django to Flask, Python 2 to 3, or even Angular to view.js.

This can be a big challenge.

If you had hundreds of active devs and millions of lines of code, it's a huge challenge.

We have been Barreto from Yelp here to recount their story of moving 3.8 million

lines of code from Python 2 to 3.

But this is not just a 2 to 3 story.

It has many lessons on how to migrate code in many situations.

There are plenty of gems to take from his experience.

This is Talk Python to Me. Episode 401 recorded January 18, 2003. Welcome to Talk Python, a weekly podcast on Python.

This is your host, Michael Kennedy.

Follow me on Massadon, where I'm at M. Kennedy and follow the podcast using at TalkPython,

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