polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- `read_database` does not respect data type when all values are null (but `read_database_uri` does)
- partition_by on LazyFrame
- group_by_dynamic with offset computes wrong window starts when a DST time change happens just before the 1st window
- `selectors` should support slicing columns
- It is not possible to concatenate arrays of different data types.
- feat(Python): Allow left/center as table cell alignment format for notebooks
- Rust API for editing metadata when creating Parquet and IPC/Arrow output
- Expand `List` & `Array` to columns
- Save version in parquet metadata
- Inconsistent Round behavior
- Docs
- Rust not yet supported