polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- register_io_source() filtering order
- `schema` parameter for `scan_ipc()`
- Usage of avro-schema for avro format
- JSON roundtrip fails for several dtypes (`struct.json_encode` and `str.json_decode`)
- Inconsistent behavior of fmt_str_lengths between __str__ (print) and _repr_html (Jupyter display)
- More expressive error messages on casting related ArrowInvalid exceptions
- Overly strict typing in lazyframe name parsing methods
- Accept Mapping Protocols for DataFrame construction
- PanicException suggesting polars[rt64] on a dataframe with 65k rows
- Elementwise expression not pushed down join_asof
- Docs
- Rust not yet supported