April 20, 2026

#477 Lazy, Frozen, and 31% Lighter

45 minutes

Topics covered in this episode:

Django Modern Rest

Already playing with Python 3.15

Cutting Python Web App Memory Over 31%

tryke - A Rust-based Ptyhon test runner with a Jest-style API

Extras

Joke

Watch on YouTube

About the show

Sponsored by us! Support our work through:

Our courses at Talk Python Training

The Complete pytest Course

Patreon Supporters

Connect with the hosts

Michael: @[email protected] / @mkennedy.codes (bsky)

Brian: @[email protected] / @brianokken.bsky.social

Show: @[email protected] / @pythonbytes.fm (bsky)

Join us on YouTube at pythonbytes.fm/live to be part of the audience. Usually Monday at 11am PT. Older video versions available there too.

Finally, if you want an artisanal, hand-crafted digest of every week of the show notes in email form? Add your name and email to our friends of the show list, we'll never share it.

Michael #1: Django Modern Rest

Modern REST framework for Django with types and async support

Supports Pydantic, Attrs, and msgspec

Has ai coding support with llms.txt

See an example at the “showcase” section

Brian #2: Already playing with Python 3.15

3.15.0a8, 2.14.4 and 3.13.13 are out

Hugo von Kemenade

beta comes in May, CRs in Sept, and Final planned for October

But still, there’s awesome stuff here already, here’s what I’m looking forward to:

PEP 810: Explicit lazy imports

PEP 814: frozendict built-in type

PEP 798: Unpacking in comprehensions with * and **

PEP 686: Python now uses UTF-8 as the default encoding

Michael #3: Cutting Python Web App Memory Over 31%

I cut 3.2 GB of memory usage from our Python web apps using five techniques:

async workers

import isolation

the Raw+DC database pattern

local imports for heavy libraries

disk-based caching

See the full article for details.

Brian #4: tryke - A Rust-based Ptyhon test runner with a Jest-style API

Justin Chapman

Watch mode, Native async support, Fast test discovery, In-source testing, Support for doctests, Client/server mode for fast editor integrations, Pretty, per-assertion diagnostics, Filtering and marks, Changed mode (like pytest-picked), Concurrent tests, Soft assertions,

JSON, JUnit, Dot, and LLM reporters

Honestly haven’t tried it yet, but you know, I’m kinda a fan of thinking outside the box with testing strategies so I welcome new ideas.

Extras

Brian:

Why are’t we uv yet?

Interesting take on the “agents prefer pip”

Problem with analysis.

Many projects are libraries and don’t publish uv.lock file

Even with uv, it still often seen as a developer preference for non-libarries. You can sitll use uv with requirements.txt

PyCon US 2026 talks schedule is up

Interesting that there’s an AI track now. I won’t be attending, but I might have a bot watch the videos and summarize for me. :)

What has technology done to us?

Justin Jackson

Lean TDD new cover

Also, 0.6.1 is so ready for me to start f-ing reading the audio book and get on with this shipping the actual f-ing book and yes I realize I seem like I’m old because I use “f-ing” while typing.

Michael:

Python 3.14.4 is out

Beanie 2.1 release

Joke: HumanDB - Blazingly slow. Emotionally consistent.

...more

View all episodes

By Michael Kennedy and Brian Okken

4.7

212212 ratings

April 20, 2026

#477 Lazy, Frozen, and 31% Lighter

45 minutes

Topics covered in this episode:

Django Modern Rest

Already playing with Python 3.15

Cutting Python Web App Memory Over 31%

tryke - A Rust-based Ptyhon test runner with a Jest-style API

Extras

Joke

Watch on YouTube

About the show

Sponsored by us! Support our work through:

Our courses at Talk Python Training

The Complete pytest Course

Patreon Supporters

Connect with the hosts

Michael: @[email protected] / @mkennedy.codes (bsky)

Brian: @[email protected] / @brianokken.bsky.social

Show: @[email protected] / @pythonbytes.fm (bsky)

Join us on YouTube at pythonbytes.fm/live to be part of the audience. Usually Monday at 11am PT. Older video versions available there too.

Finally, if you want an artisanal, hand-crafted digest of every week of the show notes in email form? Add your name and email to our friends of the show list, we'll never share it.

Michael #1: Django Modern Rest

Modern REST framework for Django with types and async support

Supports Pydantic, Attrs, and msgspec

Has ai coding support with llms.txt

See an example at the “showcase” section

Brian #2: Already playing with Python 3.15

3.15.0a8, 2.14.4 and 3.13.13 are out

Hugo von Kemenade

beta comes in May, CRs in Sept, and Final planned for October

But still, there’s awesome stuff here already, here’s what I’m looking forward to:

PEP 810: Explicit lazy imports

PEP 814: frozendict built-in type

PEP 798: Unpacking in comprehensions with * and **

PEP 686: Python now uses UTF-8 as the default encoding

Michael #3: Cutting Python Web App Memory Over 31%

I cut 3.2 GB of memory usage from our Python web apps using five techniques:

async workers

import isolation

the Raw+DC database pattern

local imports for heavy libraries

disk-based caching

See the full article for details.

Brian #4: tryke - A Rust-based Ptyhon test runner with a Jest-style API

Justin Chapman

JSON, JUnit, Dot, and LLM reporters

Honestly haven’t tried it yet, but you know, I’m kinda a fan of thinking outside the box with testing strategies so I welcome new ideas.

Extras

Brian:

Why are’t we uv yet?

Interesting take on the “agents prefer pip”

Problem with analysis.

Many projects are libraries and don’t publish uv.lock file

Even with uv, it still often seen as a developer preference for non-libarries. You can sitll use uv with requirements.txt

PyCon US 2026 talks schedule is up

Interesting that there’s an AI track now. I won’t be attending, but I might have a bot watch the videos and summarize for me. :)

What has technology done to us?

Justin Jackson

Lean TDD new cover

Michael:

Python 3.14.4 is out

Beanie 2.1 release

Joke: HumanDB - Blazingly slow. Emotionally consistent.

...more

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#477 Lazy, Frozen, and 31% Lighter

#477 Lazy, Frozen, and 31% Lighter

More shows like Python Bytes

The Changelog: Software Development, Open Source

The a16z Show

Daily Tech News Show

Software Engineering Daily

Talk Python To Me

Super Data Science: ML & AI Podcast with Jon Krohn

NVIDIA AI Podcast

Syntax - Tasty Web Development Treats

Tech Brew Ride Home

Practical AI

The Real Python Podcast

No Priors: Artificial Intelligence | Technology | Startups

Latent Space: The AI Engineer Podcast

This Day in AI Podcast

The AI Daily Brief: Artificial Intelligence News and Analysis