polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- Printing a LazyFrame triggers resolving to the IR
- Documentation suggests you can use `<`, `>`, `==`, `<=`, `>=` operators to construct `Expr` in Rust but that's fundamentally not possible.
- QOL improvements for .rolling
- writing to os.devnull
- `Series[list].explode()` should not return `None` for empty lists
- Using `scan_csv(..., with_column_names=...)` does not defer path expansion to `collect`
- Description of sort method is ambiguous
- replace / replace_strict is slow for large mapping
- write_parquet(..., pyarrow_options={'partition_cols': [..., ]}) munges partition column
- Document and improve filter function to highlight the behavior difference of polars vs pandas/others
- Docs
- Rust not yet supported