polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- sink_csv writes empty CSV after first iteration
- Enhancement: Support sorting by multiple columns in Expr.rank
- Optimize infer_schema_length in pl.Dataframe. 100 can lead to silently lost columns for no reason.
- `head(n)` and `tail(n)` fails for negative `n` for expressions and aggregation context
- `infer_schema_length=None` not working as expected in multiple files reading
- Add `Expr.unique_id`
- Add `pl.col().null_if(<condition: pl.Expr) -> pl.Expr` function
- Type Hint for `pl.Series` is `Sequence` but could be better as `Iterable`
- ci: Run Narwhals test suite
- Add new engine to write_excel
- Docs
- Rust not yet supported