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An in-depth technical guide from the PyStatR+ publication library.

Data wrangling South Sudan census data with Python Polars — tutorial cover image

Data Wrangling & Transformation: South Sudan 2008 Census

A Beginner’s Guide to Data Wrangling with Polars

Python

Polars

Data Wrangling

Demographics

Census

Master data wrangling with Polars using South Sudan’s 2008 census data — a beginner-friendly tutorial covering select, filter, sort, and group_by.

May 15, 2026

Alier Reng

10 min

Technical Guides & Insights

Browse technical guides, tutorials, and institutional insights across data science, statistics, ML, and AI. Use search and filters to find what you need.

Data filtering with Python Polars DataFrames — tutorial cover image

Data Filtering in Polars: A Modern Approach to DataFrame Operations

A Beginner’s Guide to Row Filtering with Python and Polars

Python

Polars

Data Analysis

Learn modern data filtering with Polars — a beginner-friendly tutorial covering row filtering, multiple conditions, and lazy evaluation with exercises.

May 22, 2026

Alier Reng

13 min

Data Wrangling & Transformation: South Sudan 2008 Census

A Beginner’s Guide to Data Wrangling with Polars

Python

Polars

Data Wrangling

Demographics

Census

Master data wrangling with Polars using South Sudan’s 2008 census data — a beginner-friendly tutorial covering select, filter, sort, and group_by.

May 15, 2026

Alier Reng

10 min

A note from the PyStatR+ founder — article cover image

A Note from the Founder

Why PyStatR+ Exists—and Who It Is For

Founder

Vision

PyStatR+

A personal note from the founder of PyStatR+ on purpose, people, and building human-centered data science education with clarity, ethics, and empathy.

Jan 18, 2026

Alier Reng

7 min

The Mentor Who Transformed My Learning Journey

Education & Mentorship

Biar D’Chol Biar reflects on how patient, human-centered mentorship turned programming and statistics into confidence, curiosity, and capability.

Nov 1, 2025

Biar D’Chol Biar

4 min

Welcome to PyStatR+

Learning Simplified. Communication Amplified.

Announcement

About

PyStatR+

Welcome to PyStatR+ — building technical capacity through data science education, analytics, and publishing, rooted in South Sudan and its diaspora.

Oct 15, 2025

Alier Reng

4 min

Unlocking your computer's true potential — student journey cover image

Unlocking Your Computer’s True Potential: A Student’s Journey with PyStatR+

Master of Public Policy Candidate

Education & Mentorship

MPP candidate Daniel Mabior Achiek on how PyStatR+ mentorship turned a daunting statistics requirement into practical, transferable analytical skills.

Oct 1, 2025

Daniel Mabior Achiek

4 min

A Testament to Resilience and Achievement

Professional Tribute and Congratulatory Message

Tributes & Testimonials

Community

Rev. Jacob Thon Guot’s tribute to Alier Reng’s journey — from refugee camps in Ethiopia and Kenya to a distinguished career in healthcare data science.

Jan 22, 2025

Rev. Jacob Thon Guot

4 min