polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- Support datetime ceiling and flooring
- Polars cannot read column of numbers with trailing zeroes (.000) as ints even when specified in schema override
- 2-column dataframe to_dict
- `.is_in` breaking change without any warning
- `dtype` for `to_dummies()` and using `bool` as default
- allocator=default doesn't work because it is tied to macos and emscripten
- Relative tolerance in `join_asof`
- [PROPOSAL] Add `format="mixed"` or enhanced format inference to `Expr.str.to_datetime`
- Improve DataFrame construction from dictionary mapping `dict[column_name, dict[row_label, value]]` (Polars poor handling of nested json)
- fix(rust): Fix `Int128` literal casting in `when/then/otherwise` expressions
- Docs
- Rust not yet supported