polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- JSONL Stream Reader for Cloud Storage
- Schema inference fails with multiple csv files.
- Upsampling unexpectedly discards higher frequency data
- Polars parquet writer does not write dictionary_page_offset
- Enhance `reshape` to allow currently "invalid" reshapes
- `read_csv` confusion error when `infer_schema_length=-1` (OverflowError: can't convert negative int to unsigned)
- Handle remote urls (GCP/Azure/AWS) when writeing IPC (for consistency with write_parquet)
- Add support for page skipping in parquet reader
- Horizontal version of cumulative product (polars.cum_prod_horizontal)
- Cryptic error message when empty list is passed to all_horizontal
- Docs
- Rust not yet supported