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!

PublishesMonthlyEpisodes31Founded3 years ago
Number of ListenersCategories
Tech NewsNews

Listen to this Podcast

Artwork for core.py

Latest Episodes

This one is a short one. But it's also a big one. We'd invite you to listen to it, but you don't need to follow us. You don't need to follow anybody! You've got to think for yourselves! You're all individuals!

## Timestamps

(00:00:00) INTRO

(00:00... more

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

Key Facts

Accepts Guests
Accepts Sponsors
Contact Information
Podcast Host
Number of Listeners
Find out how many people listen to this podcast per episode and each month.

Similar Podcasts

People also subscribe to these shows.

Talk Python To Me
Talk Python To MeMichael Kennedy
Oxide and Friends
Oxide and FriendsOxide Computer Company
Python Bytes
Python BytesMichael Kennedy and Calvin Hendryx-Parker
The Stack Overflow Podcast
The Stack Overflow PodcastThe Stack Overflow Podcast

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 the core.py podcast; CPython core developer in residence; Python Software Foundation involvement
Pablo Galindo
Co-host of the core.py podcast; CPython core developer and contributor

Reviews

5.0 out of 5 stars from 101 ratings
  • In depth /and/ entertaining

    If you write Python and you’re curious about how the language is made and evolves then you’ll enjoy these detailed and often humorous episodes.

    Apple Podcasts
    5
    Endoid
    Germany4 months ago
  • 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
    3 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 Kingdom3 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.

Show is seen as a go-to for Python core developers and open-source contributors.
Listeners praise deep, entertaining dives into Python internals and real-world development stories.
Audience appreciates hosts' expertise and clarity in explaining complex topics.

Chart Rankings

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

Apple Podcasts
#152
United States/News/Tech News
Apple Podcasts
#166
United Kingdom/News/Tech News
Apple Podcasts
#233
France/News/Tech News
Apple Podcasts
#65
Brazil/News/Tech News
Apple Podcasts
#71
Netherlands/News/Tech News
Apple Podcasts
#82
India/News/Tech News

Talking Points

Recent interactions between the hosts and their guests.

Episode 30: Live from EuroPython, an Interview with Guido van Rossum
Q: Why did Python introduce static typing without a preprocessor?
They chose a path where type annotations are stored in dummy slots from the start, so static type checkers could operate externally without modifying the interpreter or requiring a preprocessor, enabling smoother adoption.
Episode 30: Live from EuroPython, an Interview with Guido van Rossum
Q: What is the perchance keyword supposed to do in Python?
Perchance is a conditional expression that tries the first part (A) and, if it succeeds, uses that result; if an exception occurs, it falls back to the second part (B). You can also constrain it to catch only specific exceptions.
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 centers on Python internals and CPython development, featuring in-depth technical discussions about how Python works under the hood, tooling, and governance workflows. Episodes blend practical engineering stories with candid reflections on leadership, onboarding, sponsorships, and community processes, often peppered with humor. Notable strengths include high-level access to core development insights, real-world engineering anecdotes, and thoughtful commentary on AI-assisted tooling in code reviews and collaboration, which may appeal to listeners who build or contribute to programming languages and open-source projects.

Where can I find podcast stats for core.py?

Rephonic provides a wide range of podcast stats for core.py. We scanned the web and collated all of the information that we could find in our comprehensive podcast database. See how many people listen to core.py and access YouTube viewership numbers, download stats, audience demographics, chart rankings, ratings, reviews and more.

How many listeners does core.py get?

Rephonic provides a full set of podcast information for four million podcasts, including the number of listeners. View further listenership figures for core.py, including podcast download numbers and subscriber numbers, so you can make better decisions about which podcasts to sponsor or be a guest on. You will need to upgrade your account to access this premium data.

What are the audience demographics for core.py?

Rephonic provides comprehensive predictive audience data for core.py, including gender skew, age, country, political leaning, income, professions, education level, and interests. You can access these listener demographics by upgrading your account.

How many subscribers and views does core.py have?

To see how many followers or subscribers core.py has on Spotify and other platforms such as Castbox and Podcast Addict, simply upgrade your account. You'll also find viewership figures for their YouTube channel if they have one.

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. Oxide and Friends
4. Python Bytes
5. The Stack Overflow Podcast

How many episodes of core.py are there?

core.py launched 3 years ago and published 31 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?

Our systems regularly scour the web to find email addresses and social media links for this podcast. We scanned the web and collated all of the contact information that we could find in our podcast database. But in the unlikely event that you can't find what you're looking for, our concierge service lets you request our research team to source better contacts for you.

Where can I see ratings and reviews for core.py?

Rephonic pulls ratings and reviews for core.py from multiple sources, including Spotify, Apple Podcasts, Castbox, and Podcast Addict.

View all the reviews in one place instead of visiting each platform individually and use this information to decide if a show is worth pitching or not.

How do I access podcast episode transcripts for core.py?

Rephonic provides full transcripts for episodes of core.py. Search within each transcript for your keywords, whether they be topics, brands or people, and figure out if it's worth pitching as a guest or sponsor. You can even set-up alerts to get notified when your keywords are mentioned.

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.

Find and pitch the right podcasts

We help savvy brands, marketers and PR professionals to find the right podcasts for any topic or niche. Get the data and contacts you need to pitch podcasts at scale and turn listeners into customers.
Try it free for 7 days