polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- Column-wise type cast failed when using pl.when
- User Guide datasets are scattered and/or missing
- RFC: `schema_provider` + `schema_sampler` option for `scan_parquet` to allow for programmatic/custom schema management
- Inconsistent behaviour for `strict` dataframe creation
- docs(python): Add example of `Series` as predicate
- `read_csv` fails schema inference when `schema_overrides` is a tuple or dict instead of a list
- feat: Add `concat` method to `arr` namespace
- Group_by on a literal and agg len returns a surprising result for a dataframe without columns
- fix: Accept general `Sequence` and `Mapping` for `schema_overrides` parameter in `read_csv`
- fix(python): Fix `read_excel` and `read_ods`'s `sheet_name` type hint not using `typing.Sequence`
- Docs
- Rust not yet supported