polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- Clarify what date formats are inferred for CSV (4 digits year, big and small endian only)
- Reading csvs through a TextIOWrapper raises OSError: failed to write whole buffer
- time32[s] custom arrow metadata in parquet file leads to value corruption
- `pl.concat` failed due to `json_decode` may randomize the order of fields
- Set up `polars.typing` module with curated type aliases
- Cast on datatypes with different nesting levels are never strict
- Using `scan_csv` with `with_column_names` argument disables schema validation
- `strict` parameter not applied correctly during row-wise DataFrame construction
- `read_ipc` and `scan_ipc` use more memory than needed.
- "Can't patch loop of type `<class 'uvloop.Loop'>`" error
- Docs
- Rust not yet supported