polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- `polars.scan_parquet` no longer supports wildcard "*" in source parameter since `1.29.0`
- Scan Parquet - Casting before filtering prevents filter pushdown
- Nicer Formatting for DataFrame.glimpse
- computeError: not yet implemented: Writing dictionary arrays to parquet only support data type Decimal(29,9) when using partitionMaxSize and sink_parquet
- Add parameter to write_parquet to control number of files in partitions
- Authentication fails for Azure Blob Storage in 1.29.0
- Expose category codes (Pandas equivalent of .cat.codes)
- `pl.repeat` no longer allows single element numpy array as scalar
- Improve performance of `concat_list` implementation
- Sometimes datetime[ns] is not replaced with pl.date in pl.when
- Docs
- Rust not yet supported