Data Analysis with Polars and Python

This course features Coursera Coach! A smarter way to learn with interactive, real-time conversations that help you test your knowledge, challenge assumptions, and deepen your understanding as you progress through the course. Take your data analysis skills to the next level with advanced Polars techniques. This course covers complex data structures, reshaping operations, text manipulation, and working with categorical and datetime data, giving you the ability to handle diverse and intricate datasets efficiently. You'll begin by mastering concatenation methods, including vertical, horizontal, diagonal, and aligned merges, followed by optimizing DataFrames through rechunking and vstack/hstack operations. Then, you'll learn to reshape data, pivot tables, and handle arrays and lists for more flexible analysis. Next, you'll explore nested structures with structs, perform sophisticated text transformations, manage categorical data and enums, and manipulate datetime fields with precision. Each module builds on practical examples, preparing you to tackle real-world data scenarios confidently. This course is perfect for intermediate Python users, data analysts, and data scientists seeking to enhance their Polars expertise. Prior experience with Python and basic data handling is recommended, as the course dives into advanced operations and complex data manipulations. By the end of the course, you will be able to concatenate, reshape, and transform DataFrames, manipulate arrays, lists, and nested structs, perform advanced text and datetime operations, and manage categorical data efficiently using Polars for robust data analysis.

This course features Coursera Coach! A smarter way to learn with interactive, real-time conversations that help you test your knowledge, challenge assumptions, and deepen your understanding as you progress through the course. Elevate your data analysis expertise by mastering aggregation techniques and performance optimization in Polars. This course guides you through advanced data selection, grouping, and aggregation methods while teaching you how to optimize workflows using lazy evaluation for faster, more efficient processing of large datasets. You will start by learning selectors to target specific rows and columns with precision, including selection by data type, column position, and set operations. The course then covers advanced GroupBy operations, showing how to aggregate data across multiple columns, work with temporal datasets, and leverage window functions for complex calculations. Finally, you'll explore LazyFrames to understand eager versus lazy evaluation, perform optimized CSV scans, and convert standard DataFrames for improved performance. Practical examples emphasize speed, memory efficiency, and scalable workflows for real-world datasets. This course is ideal for intermediate to advanced Python users, data analysts, and data scientists who want to optimize Polars workflows. Familiarity with Python and basic Polars operations is recommended to fully leverage advanced aggregation and performance techniques. By the end of the course, you will be able to efficiently select and aggregate data using selectors and GroupBy methods, handle temporal and multi-column datasets, implement window functions, and utilize LazyFrames for optimized performance in Polars.