Pablo Galindo and Łukasz Langa

core.py

News EN ↓ Epizody: 31

We talk about Python internals, because we work on Python internals. We joke about stuff, because we’re jokers. Episodes between 60 and 90 minutes in length. We’ve done more than a few so far and it doesn’t seem like we’ll be stopping any time soon! Hi Loren!

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Pablo Galindo and Łukasz Langa

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News

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28. čvc 2026

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Epizody

Episode 6 - An Exceptional Episode 08.01.2024 1:31:25

Happy New Year! In this episode we're talking about exceptions, how they work, and how they evolved. Expect the unexpected. # Timestamps (00:00:00) INTRO (00:01:43) How does a 'try' block work? (00:04:00) How many 'try' blocks can you fit on a bus? (00:05:56) How does Python store the current exception? (00:09:30) Pre-history: exceptions as strings (00:12:59) Try out stri...

Episode 5 - Cinder with Carl Meyer 11.12.2023 1:21:19

This time we're hosting a special guest: Carl Meyer from Meta. What is Cinder, how does it work, and how does it intersect with the future of Python 3? Find out in today's episode. 100% serious stuff! # Timestamps (00:00:00) INTRO (00:00:53) Carl Meyer's war story (00:02:27) CINDER (00:03:22) Static Python makes things significantly faster (00:08:15) Cinder JIT and how it's tu...

Episode 4 - Frame Evaluation 29.11.2023 1:13:20

What makes Python an interpreter? Today we're talking about ceval.c, the wonders of frame evaluation, and how it changed over the years. # Timestamps (00:00:00) INTRO (00:00:59) BACK TO PYTHON 2.6 (00:02:53) Stack virtual machine (00:04:41) First encounter with opcodes (00:08:06) What even is frame evaluation? (00:12:51) Stack! Which stack? (00:15:46) PRESENT DAY (00:16:41) Computed go...

Episode 3 - Imports, frozen modules, Python news 13.11.2023 1:11:44

What happens when you type “import abc”? Why does it say the module is frozen? What significant changes landed in Python in the past two weeks? And why does the “PR of the Week” jingle go so hard? Find out in this week’s episode! # Timestamps (00:00:00) INTRO (00:01:12) IMPORTS (00:02:21) Here be dragons (00:02:42) High level summary (00:05:12) Finders and Loaders (00:06:29) Loading encrypte...

Episode 2 - PEP 703: Removing the GIL 30.10.2023 1:14:39

We've read the PEP on making the Global Interpreter Lock optional so you don't have to. Timestamps (00:00:00) Intro (00:00:50) CURRENT STATE OF THINGS (00:00:58) Reference counting (00:01:35) Garbage collection (00:02:33) What is the Global Interpreter Lock? (00:03:57) The GIL and threading (00:07:24) Current ways around the GIL (00:09:26) HISTORICAL ATTEMPTS TO REMOVE THE GIL (00:09:46) 1...

Episode 1 - Core Sprint in Brno & Python 3.13.0 alpha 1 30.10.2023 1:11:59

In this first episode Pablo and Łukasz talk about what happened in at the 2023 Cpython Core Developer sprint. Join us and learn from our ramblings about a possible new CPython new JIT compiler, how we are making the REPL easier, what in the world is a memory hive, and how we are trying to make a new C API without making everyone mad. Timestamps (00:00:00) Intro (00:01:02) Cpython core developer sp...