polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- `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
- Support for Business Day Lengths in group_by_dynamic
- Rename after finishing writing file to disk to avoid corrupted parquet files.
- Support for making all possible combinations of elements in a df, multiIndex from the cartesian product of multiple iterables?
- Docs
- Rust not yet supported