Data Frames are widely used and useful structures for data wrangling. The querier is a query language for Python Data Frames, inspired from SQL’s relational databases querying logic. Previous posts about the querier can be found on this blog.

A documentation for the tool is now available on readthedocs. Feel free to read it (of course), complete it, or correct it.

For those who are working from home because of the COVID-19, I’d recommend this book, that offers an interesting depiction of our data-driven society: Weapons of Math Destruction, How Big Data Increases Inequality and Threatens Democracy (and nope, I’m not paid to promote this book). Despite its title, the book is highly accessible, even to people with no background in Mathematics.


Note: I am currently looking for a gig. You can hire me on Malt or send me an email: thierry dot moudiki at pm dot me. I can do descriptive statistics, data preparation, feature engineering, model calibration, training and validation, and model outputs’ interpretation. I am fluent in Python, R, SQL, Microsoft Excel, Visual Basic (among others) and French. My résumé? Here!