Rephonic
Artwork for core.py
Cpython
Python
Garbage Collection
Python 3.14
Memory Management
Reference Counting
Python Internals
Tokenizer
Parser
Python 3.13
Error Handling
Abstract Syntax Tree (AST)
JIT Compiler
Python Import System
Tokens
Performance Optimizations
Version 3.12
Backticks
Python 1.0
Weak References

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!

PublishesInfrequentlyEpisodes30Founded3 years ago
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Artwork for core.py

Latest Episodes

Let's talk about what it really means in practice that AI tools are used in the cpython GitHub repository now. First-hand opinions based on first-party experience. And some personal news!

## Timestamps

(00:00:00) INTRO

(00:00:58) PART 0: Developer... more

Let's take a breather from heavy content and take a look back at last year in this light but spicy episode! The good, the less good, and the disgusting. All that in barely an hour!

## Timestamps

(00:00:00) INTRO

(00:01:32) Pablo Galindo SPACE

(00... more

Inside of you there are two stacks. Actually, there’s three. The system-level call stack, the CPython call stack, and the interpreter’s evaluation stack. What is all that about? Today we’ll talk about how synchronous Python function calls work. Async... more

More interviews from the core sprint! This time we have: Greg P. Smith, Thomas Wouters, Paul Ganssle, Pradyun Gedam, Carol Willing, Guido van Rossum, Brett Cannon, Erlend Aasland, Tal Einat, Lysandros Nikolaou, Yury Selivanov, and Diego Russo -- the ... more

Key Facts

Accepts Guests
Contact Information
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Recent Guests

Greg Smith
Core Developer, involved in Python internals and OS module
Episode: Episode 26.2: CPython Sprint Week in Cambridge UK, Part 2
Paul Ganssle
Core Developer, interested in time zones and datetime improvements
Episode: Episode 26.2: CPython Sprint Week in Cambridge UK, Part 2
Guido van Rossum
Creator of Python and influential leader in the community
Episode: Episode 26.2: CPython Sprint Week in Cambridge UK, Part 2
Brett Cannon
Known for contributions to Python's ecosystem and packaging
Episode: Episode 26.2: CPython Sprint Week in Cambridge UK, Part 2
Diego Russo
Organizer of the Sprint Week, involved in Python outreach
ARM
Episode: Episode 26.2: CPython Sprint Week in Cambridge UK, Part 2
Antonio Cuni
Core developer at PyPy
PyPy
Episode: Episode 26.1: CPython Sprint Week in Cambridge UK, Part 1
Hood Chatham
Core developer contributing to the JavaScript runtime for Python
Pyodide
Episode: Episode 26.1: CPython Sprint Week in Cambridge UK, Part 1
Mark H.
Core Developer working on incremental garbage collection
Python
Episode: Episode 26.1: CPython Sprint Week in Cambridge UK, Part 1
Larry Hastings
Core Developer known for features in Python
Python
Episode: Episode 26.1: CPython Sprint Week in Cambridge UK, Part 1

Hosts

Łukasz Langa
Co-host of core.py podcast
Pablo Galindo
Co-host of core.py podcast

Reviews

5.0 out of 5 stars from 97 ratings
  • A little deeper than your average Python podcast, which makes it so great!

    The two hosts really know what they are talking about, and they seem to enjoy this, so how could I not give this a top grade!

    Podcast Addict
    5
    mac
    2 years ago
  • Łukasz & Pablo bring out the fun in core.py

    Łukasz & Pablo are great to listen to - taking really deep topics but they k ow their stuff so we’ll that they can explain it all so clearly. To be fair you do need to know Python but these discussions are so good, you’ll be informed, educated and entertained :-)

    Apple Podcasts
    5
    Endoid
    United Kingdom2 years ago
  • Great initiative!

    It is always cool to hear from Python Core devs directly.

    Apple Podcasts
    5
    lmnbr
    United Kingdom3 years ago

Listeners Say

Key themes from listener reviews, highlighting what works and what could be improved about the show.

Listeners appreciate the clear depth on Python internals and the hosts' obvious expertise.
The banter is entertaining but stays grounded in technical realities.
Guests from Python core bring valuable insider perspectives.
Audience seems to value practical takeaways over hype.

Chart Rankings

How this podcast ranks in the Apple Podcasts, Spotify and YouTube charts.

Apple Podcasts
#156
United Kingdom/News/Tech News
Apple Podcasts
#229
Canada/News/Tech News
Apple Podcasts
#187
Germany/News/Tech News
Apple Podcasts
#195
France/News/Tech News
Apple Podcasts
#218
Italy/News/Tech News
Apple Podcasts
#58
Norway/News/Tech News

Talking Points

Recent interactions between the hosts and their guests.

Episode 11: Live from PyCon 2024
Q: Who is responsible for the new distribution versions for Python 3.13?
Ubuntu and the Dead Snake repository are expected to provide the packages with free-threading and Git-enabled options for Python 3.13.
Episode 13: A Legit Episode
Q: How did you start contributing to CPython?
Brandt started contributing by getting involved with other Python-related projects like MyPy and gradually transitioned to contributing to CPython itself, finding and fixing bugs.

Audience Metrics

Listeners, social reach, demographics and more for this podcast.

Listeners per Episode
Gender Skew
Location
Interests
Professions
Age Range
Household Income
Social Media Reach

Frequently Asked Questions About core.py

What is core.py about and what kind of topics does it cover?

This show concentrates on Python internals, CPython development, and related tooling, with discussions that range from low-level interpreter details to high-level ecosystem implications. Episodes often cover threading models, performance improvements, and upcoming language features, interspersed with sprint-week reports, packaging challenges, and community dynamics. The hosts bring humor and sharp technical insight, and guests from the Python core and ecosystem frequently share hands-on experiences, making it a practical listen for developers who want to understand how Python evolves under the hood. A standout aspect is the emphasis on real-world engineering challenges, collaboration in open source, and previews of upcoming Python versions ... more

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How many listeners does core.py get?

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Which podcasts are similar to core.py?

These podcasts share a similar audience with core.py:

1. The Real Python Podcast
2. Talk Python To Me
3. The Pragmatic Engineer
4. The Changelog: Software Development, Open Source
5. Oxide and Friends

How many episodes of core.py are there?

core.py launched 3 years ago and published 30 episodes to date. You can find more information about this podcast including rankings, audience demographics and engagement in our podcast database.

How do I contact core.py?

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What guests have appeared on core.py?

Recent guests on core.py include:

1. Greg Smith
2. Paul Ganssle
3. Guido van Rossum
4. Brett Cannon
5. Diego Russo
6. Antonio Cuni
7. Hood Chatham
8. Mark H.

To view more recent guests and their details, simply upgrade your Rephonic account. You'll also get access to a typical guest profile to help you decide if the show is worth pitching.

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