polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- Memory usage regression in parquet reading after 1.27.1
- GroupBy First/Last Preserve Original DataFrame
- `DataFrame.upsample()` does not actually upsample for `pl.Date` when `every` is more granular than a day
- Sample code does not compile
- fix: Upcast to `i128` when calling `diff` on `u64` series
- fix(python): Fix pycapsule conversion for non-struct series
- Enums written to parquet with `>=1.32.0` are quietly being turned into categoricals when read by older versions
- test(python): Ensure `read_database` and `write_database` do not close user supplied connections
- Enhanced write json output
- Allow row-level filtering in `pl.read_parquet`
- Docs
- Rust not yet supported