On this special F8 2019 episode of The Diff, Lisa Roach and John Reese, software engineers at Facebook, join Joel on our first live broadcast to discuss the role of Python at Facebook. Understand why Python is a core language at Facebook, why we are so involved in the Python community and learn about some of our recent Python-based open source projects, including Bowler. And just before both Lisa and John head to PyCon, we learn about some of the cool things happening in Python lately.