Python Polars Cheatsheet (based on our O'Reilly book)

Polars is a fast DataFrame library for Python that enables data transformation, analysis, and visualization through method chaining and an expressive API. The cheatsheet provides quick reference guides for working with Polars' core data structures (Series, DataFrame, and LazyFrame) and covers both eager and lazy execution modes, with the lazy API optimizing queries through predicate and projection pushdown. Users can install Polars with optional dependencies and leverage its streaming engine to handle datasets larger than available memory.