polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- Possibly inconsistent behavior of `pl.mean`/`pl.Expr.mean`/`pl.Series.mean` not raising on str
- CSE optimization in group_by then aggregation
- Decimals in Lists fail to roundtrip the row encoding
- `mean_horizontal` raises on temporals
- qcut panics when applied to a categorical column
- CSV column names with double-quotes in them are parsed incorrectly
- Fill null values uses `.struct.with_fields(pl.field(column).forward_fill())`.
- Running database tests under Python 3.13 leads to ResourceWarning (unclosed database)
- Parquet reading regression from 1.17.0 on
- Panic of `LazyFrame::scan_parquet` with hive partitioned parquet files occurring with polars 0.45.0 (0.44.0 works)
- Docs
- Rust not yet supported