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Jeroen Janssens

@jeroenjanssens.com

322 followers 56 following 23 posts

DevRel at Posit. Author of Python Polars: The Definitive Guide & Data Science at the Command Line

Posts Replies Media

Jeroen Janssens @jeroenjanssens.com · 18/08/2026

Python Polars: The Definitive Cheatsheet is out now, and it's free. Download it, print it, laminate it, put it on your desk. opensource.posit.co/resources/ch...

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Jeroen Janssens @jeroenjanssens.com · 21/07/2025

I just finished recording an amazing #PydyTuesday Uncut episode with @wesmckinney.com. We look at scraped GitHub data, untangle deeply nested JSON, and create some sort of pulse signal for various popular GitHub repos. 📽️ Watch the full episode here: lnkd.in/eKtuxAjg

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Jeroen Janssens @jeroenjanssens.com · 07/07/2025

I've recorded another #PydyTuesday Uncut session with @mchow.com. Watch the full episode: www.youtube.com/watch?v=kyVS...

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Jeroen Janssens @jeroenjanssens.com · 02/04/2025

Our book is out! 🥳 It’s official: 𝙋𝙮𝙩𝙝𝙤𝙣 𝙋𝙤𝙡𝙖𝙧𝙨: 𝙏𝙝𝙚 𝘿𝙚𝙛𝙞𝙣𝙞𝙩𝙞𝙫𝙚 𝙂𝙪𝙞𝙙𝙚 is now available in both ebook and print formats at your favorite bookstore! 📚 Grab your copy now: polarsguide.com

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Jeroen Janssens @jeroenjanssens.com · 19/02/2025

🎉 Exciting news! Our book Python Polars: The Definitive Guide is officially off to the printer! 🚀 Can't wait? Visit polarsguide.com, enter your name and email, and we'll send you an email with a link to the first chapter (courtesy of @oreilly.bsky.social). Stay tuned for the full release! 📚

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