Jeroen Janssens
Jeroen Janssens, PhD, is a polyglot data science consultant and certified instructor. His expertise lies in visualizing data, implementing machine learning models, and building solutions using Python, R, JavaScript, and Bash. Jeroen is passionate about open source and sharing knowledge. He is the author of Data Science at the Command Line (O’Reilly, 2021) and is currently writing Python Polars: The Definitive Guide (O’Reilly, 2025). Every now and then he blogs at https://jeroenjanssens.com.
Sessions
Learn how Plotnine, a Python package inspired by R's ggplot2, enables the creation of sophisticated and effective data visualizations with minimal effort. This tutorial will explain how Plotnine's grammar of graphics approach provides a flexible, intuitive way to visualize data, either as ad-hoc plots or fine-tuned graphs suited for communication.
In this talk, we'll share our experience of converting a substantial data processing codebase from Pandas to Polars. We’ll discuss the motivations behind the switch, the challenges faced during the transition, and the significant performance gains we observed. Attendees will gain insights into when and why Polars can be a superior choice for data processing tasks, especially in performance-critical applications.