polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- Cross-architecture support
- support .var for large durations
- `next()` on GroupBy raises `AttributeError` object has no attribute `_current_index`
- `scan_parquet` + `sink_parquet` with same filename PanicException and file truncation
- .list.product
- .str.extract extracts group, .str.extract_all doesn't
- Stochastic bug: "polars.exceptions.SchemaError: invalid series dtype: expected `List`, got `str`"
- Panic when melting since 0.19.14
- Unable to `scan_parquet` a table where some of the files have columns of List[null] and some of the files have columns that conflict with datatype of List[f64]
- Polars verbose mode should provide more information about IO operations
- Docs
- Rust not yet supported