High-Performance DataFrames with Polars
Free Intermediate course · 10 lessons · 3 weeks · Certificate on completion
Replace slow pandas code with Polars' fast, expressive query engine. Across 10 lessons you'll move from fundamentals to a portfolio-ready outcome — at your own pace, with quizzes after each lesson and a final exam to certify your mastery.
What you'll learn
- Why Polars is fast
- Expressions API
- Lazy vs eager
- Selecting and filtering
- Group-by and aggregation
- Joins
Skills you'll pick up
- Why Polars is fast
- Expressions API
- Lazy vs eager
- Selecting and filtering
- Group-by and aggregation
- Joins
Tools covered
- Polars
- Real-world projects
- Quizzes
- Final exam
Course modules
Module 1: Why Polars is fast
Module 1 of High-Performance DataFrames with Polars. 3 lessons · 3h
Module 2: Selecting and filtering
Module 2 of High-Performance DataFrames with Polars. 3 lessons · 3h
Module 3: Window expressions
Module 3 of High-Performance DataFrames with Polars. 2 lessons · 2h
Module 4: Migrating from pandas
Module 4 of High-Performance DataFrames with Polars. 2 lessons · 2h
Lessons in this course
- Why Polars is fast
- Expressions API
- Lazy vs eager
- Selecting and filtering
- Group-by and aggregation
- Joins
- Window expressions
- Reading large files
- Migrating from pandas
- Performance profiling
Instructor
James Okafor — Data Platform Architect
James Okafor is a Data Platform Architect with years of hands-on experience teaching Polars to thousands of learners worldwide.
Certificate
Finish every lesson and pass the final exam to earn a free, verifiable Learnera certificate for High-Performance DataFrames with Polars. It can be downloaded as a PDF and shared on LinkedIn.
Career outcomes
Median global salary $115,000 per year · median India salary ₹16,10,000 per year · 102,008 open roles worldwide
- Polars Specialist
- Senior Polars Lead
- Polars Consultant
Frequently asked questions
Is the High-Performance DataFrames with Polars course free?
Yes. Every Learnera course, including High-Performance DataFrames with Polars, is completely free — lessons, quizzes, the final exam, and the certificate.
How long does High-Performance DataFrames with Polars take?
10 lessons, typically completed in 3 weeks at a comfortable pace.
Do I get a certificate?
Yes — pass the final exam and you receive a free, verifiable certificate you can share on LinkedIn.