polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- Add `NameSpace` (like `pl.expr.name.ExprNameNameSpace`) to `pl.DataFrame` and `pl.Series` to change column names (or name)
- Non-monotonic tz-aware temporal conversions keep a stale sorted flag, so `sort()`/`min()` return wrong results
- Provide additional validation options for `.join(...)`
- `json_decode` parses invalid json
- Fallible predicate pushed into scan_parquet evaluates nulls as empty strings and panics (strict strptime; regression since 1.28)
- Fix all `may_fail_auto_streaming`
- Add `AGENTS.md` & `CLAUDE.md` Files
- Improve PR Template
- fix(python): Preserve UDF exceptions in expr context
- Add `**kwargs` in `pl.format` like in `str.format`
- Docs
- Rust not yet supported