polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- Scuffed error message when importing parquet with pl.read_csv (by accident)
- [question] Kafka reader
- Support `Expr.assert_all_true` expression, which preserves current values but raises error at runtime if any value is False.
- feat(rust, python): Support reading UInt8, UInt16, Int8 and Int16 in newline delimited JSON
- Ability to sort an array of structs by struct field
- Add a "not null" semantic to schemas (e.g., `pl.NotNullType(pl.Float32)`)
- Visualization with Seaborn
- Change `pl.date_range(...)` error message to suggest `pl.date_ranges(...)` when passed an `Expr` (in a `with_columns(...)` call)
- slice is not respected in the sense that apparently the whole file is loaded first. This results for me in OOM and a longer than expected time.
- Add support for HDFS to `scan_parquet`
- Docs
- Rust not yet supported