Polars

polars is the dataframe library standardized on in Brevvie Python + AI — Section 3: Data, Polars & Pair Programming. It is presented as the modern, high-performance successor to many common Pandas use cases.

Role in the source

• loads CSV data into in-memory tables
• exposes schema and dtypes clearly
• supports the core dataframe verbs: filter, select, group_by/agg, sort, and join
• handles time-series work with typed date columns

Why it matters

The lesson treats Polars as Brevvie’s default for new Python data work.