I hope you're using Python 3 these days, because one of its powerful new features is type annotations.

These let you build and maintain large-scale Python projects with much more ease and confidence.

This episode, you'll meet Lucas Lange, who helped migrate some very large Python projects.

We'll discuss how Python uses the concept of gradual typing to slowly expand the sections of your

Python code that are type checked. This is Talk Python to Me. Episode weekly podcast on Python, the language, the libraries, the ecosystem, and the personalities.

This is your host, Michael Kennedy. Follow me on Twitter where I'm at M. Kennedy.

Keep up with the show and listen to past episodes at talk python.fm.

And follow the show on Twitter via at Talk Python.

Lucas, welcome to Talk Python.

Hello.

It's great to be here with you again.

We were just recently at Pi Cascades and a nice little conference where you get to pretty much meet everyone who's there.

Oh, yeah. and a nice little conference where you get to pretty much meet everyone who's there.

Oh, yeah, like for me it was a very personal trip since I used to live in Vancouver for quite a while.

So, you know, Western culture doesn't really allow grown men to cry publicly,

but in trading a tear all the time, like seeing like all the places I used to visit and used to frequent.

So yeah, it was a great event.

I enjoyed it a lot.

Yeah, Vancouver's a wonderful city, right?

It is just a perfect size.

It's not as big and scary as New York City, but it's perfectly urban, like with proper public transport, unlike San Francisco.

So, yeah, it's one of my favorite places on Earth. Is that where you are now? Yes, I am now in the Bay Area. So yeah,

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