polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- column major reshape / transpose
- file-like objects for read_csv need seek() but it's never called
- Compatibility with PygTrie prefix trie lists/dicts
- LazyFrame check for both `unique` and `with_row_index`
- [QST/DOC]: Join key matching semantics for expression keys
- Incorrect `PolarsInefficientMapWarning` for string containment with `in`
- String to datetime conversion with custom format
- pl.scan_pyarrow_dataset drops timezone information
- feat(python): Allow vertical aggregation functions to accept `Expr`
- Projection pushdown not working for AnonymousScan when filtering on calculated column
- Docs
- Rust not yet supported