#683 – MAY 27, 2025
Narwhals: Unified DataFrame Functions
Narwhals is a lightweight compatibility layer between DataFrame libraries. You can use it as a common interface to write reproducible and maintainable data science code which supports pandas, Polars, DuckDB, PySpark, PyArrow, and more
CODECUT.AI • Shared by Marco Gorelli
ty: Astral’s New Type Checker (Formerly Red-Knot)
The folks over at Astral are back with another amazing project: ty, formerly known as Red-Knot, it is a new type checker. Talk Python interviews Charlie Marsh and Carl Meyer about this new tool.
KENNEDY ET AL podcast
First Steps With LangChain
Large language models (LLMs) have taken the world by storm. In this step-by-step video course, you’ll learn to use the LangChain library to build LLM-assisted applications.
REAL PYTHON course
Python Jobs
Sr. Software Developer (Python, Healthcare) (USA)
Prenosis
Senior Software Engineer – Quant Investment Platform (LA or Dallas) (Los Angeles, CA, USA)
Causeway Capital Management LLC
More Python Jobs >>>
Articles & Tutorials
Understanding Random Forest Using Python
A Random Forest is a powerful machine learning algorithm that can be used for classification and regression, is interpretable, and doesn’t require feature scaling. Here’s how to apply it with scikit-learn.
MICHAEL GALARNYK • Shared by Michael Galarnyk
Understanding Python Web Deployment
Trying to deploy server-side Python web applications may be overwhelming. This tutorial breaks down the why of things, rather than the what, and makes recommendations on how to approach the problem.
MIREK DŁUGOSZ
Meta Announces Pyrefly
Pyrefly is an open souce Python type checker and IDE extension built in Rust. This post announces its availability, tells you why they built it, and how you can use it.
META
How to Group Data Using Polars .group_by()
Start using Polars .group_by() to make sense of your data. This tutorial shows you how to group, aggregate, and reveal hidden insights with hands-on examples.
REAL PYTHON
Quiz: How to Group Data Using Polars .group_by()
REAL PYTHON
Nested Loops in Python
Learn how to use nested loops in Python to iterate over multiple sequences and perform repeated actions efficiently in your programs.
REAL PYTHON
Quiz: Nested Loops in Python
REAL PYTHON
Machine Learning With DuckDB and scikit-learn
Learn how to prototype a machine learning workflow using DuckDB for data handling and scikit-learn for modeling.
PETRICA LEUCA
Python: The Documentary
There’s a new documentary in the works on Python and its popularity. This is the official trailer.
YOUTUBE.COM video
The Guide to Hashing I Wish I Had When I Started
Learn the basics of hashing in this beginner-friendly guide. Discover what hashing is, how it works, its key principles, common algorithms, and practical uses for password storage and file integrity. (Code examples aren’t in Python, but most of the explanation is in text).
ANTON ÖDMAN
Loading Pydantic Models From JSON
Pydantic’s JSON loading uses a huge amount of memory; here’s how to reduce it.
ITAMAR TURNER-TRAURING
Projects & Code
flowshow: Wrapper for Python Tasks That Form a Flow
GITHUB.COM/KOANING
sql-tstring: t-string Construction of SQL Queries
GITHUB.COM/PGJONES
strif: String, File, and Object Utilities
GITHUB.COM/JLEVY
pipask: Safer Installs With Audit and Consent 𝘣𝘦𝘧𝘰𝘳𝘦 Install
GITHUB.COM/FEYNMANIX
VectorVFS: Your Filesystem as a Vector Database
VECTORVFS.READTHEDOCS.IO
Events
Weekly Real Python Office Hours Q&A (Virtual)
May 28, 2025
REALPYTHON.COM
PyCon Italia 2025
May 28 to June 1, 2025
PYCON.IT
PyDelhi User Group Meetup
May 31, 2025
MEETUP.COM
PythOnRio Meetup
May 31, 2025
PYTHON.ORG.BR
Django Girls Medellín
June 1 to June 2, 2025
DJANGOGIRLS.ORG
Melbourne Python Users Group, Australia
June 2, 2025
J.MP
AfroPython Conf 2025
June 7 to June 8, 2025
AFROPYTHONCONF.ORG
Happy Pythoning!
This was PyCoder’s Weekly Issue #683.
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