polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- Let `read_ndjson` and `read_json` open from remote file
- Trait `NamedFrom<Vec<[AnyEnum]>>` isn't implemented in `Series`
- Treat dataclasses returned by `map_elements()` functions as structs
- Struct fields get cast to Utf8 during arithmetic operations
- Implement `DataType.serialize/deserialize` for serializing to/from JSON
- map_groups has inconsistent behavior between lazy and eager. It should also accept expressions.
- optional `file_index:int` column when using `source:list[str] | list[Path]` with `scan_*`
- Make head(), tail() and limit() return the same number of rows for Expr, Series, DataFrame and LazyFrame
- JoinArgs.suffix doesn't work when using LazyFrame.join
- Raise error in str.replace and str.replace_all when referencing non-existent capture groups
- Docs
- Rust not yet supported