polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- The compiler cannot find `mean_horizontal`, `max_horizontal`, or `min_horizontal`
- suggest add some sql syntax supports
- Add add_filename to pl.read_csv (and read operations others)
- Use Parquet Statistics such as `min` and `max` to handle more complex predicates.
- scan_parquet is slow to scan over parquet dataset with many rows
- no skip_rows option for Excel files
- read_csv() does not support `file:///tmp/foo.csv` fsspec URLs while scan_csv() does
- Explicitly ordered Nominal and Ordinal Categorical Variables
- `from_numpy` cannot deal with nested dtype
- Incorrect assumptions about Binary being a String representation when parsing to UInt32 (or any other numerical) type
- Docs
- Rust not yet supported