polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- `Series.__array_ufunc__` does not properly support `datatypes.Array`
- Possibly inconsistent behavior of `pl.mean`/`pl.Expr.mean`/`pl.Series.mean` not raising on str
- CSE optimization in group_by then aggregation
- `mean_horizontal` raises on temporals
- 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)
- df.sample() should support pl.len()
- "numpy.float64 object is not callable" Panic
- Add example of adding null values in `Expr.add`
- Docs
- Rust not yet supported