polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- Unclear error msg when initializing a dataframe from list of dicts with non-string keys
- Add `extra_columns: "ignore" | "raise"`
- Add a `dtype` argument to `DataFrame.with_row_index()`
- `Expr.rechunk` does not rechunk in `with_columns`
- Add a description of how `read_parquet("s3://...")` and `scan_parquet(s3)` work (caching, fast-paths/optimizations, parallel fetchers)
- conversion from enum type fails
- Deprecate pl.Expr.rechunk
- CSV with_column_names (internally `with_schema_modify`) causes duplicate schema inference / decompression
- Support ODBC Connection Strings in `write_database`
- Polars drops sparse keys from nested dicts in schema inference
- Docs
- Rust not yet supported