polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- `scan_csv` ignores `new_columns` and `dtypes` arguments when `Time` type is used in `dtypes`
- Cumulative aggregations for list Series - `list.cum_concat`, `list.cum_set_union`
- `schema`, `schema_overrides` parameters not implemented for `pl.read_json` on array-like input JSONs
- add encoding option for write_csv
- Subtracting an unsigned integer and performing an upcast
- `pl.ewm_cov()`
- Implement MmapBytesReader for stdin
- Allow dictionary in .str.replace() and .str.replace_all()
- Implement streaming for scan_pyarrow_dataset
- add optiont to write csv with escaping characters
- Docs
- Rust not yet supported