polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- `cs.by_name` fails to return columns in specified order when passed `require_all=False`
- Generalize the type of the input to rename from dict to mapping
- `map_elements` does not support dtype Decimal
- Better error messages when using lazy mode
- In aggregation, `drop_nulls().get(<expression>)` produces list instead of scalar
- Looking for documentation for Lazyframe Internals
- `write_parquet` followed by `read_parquet` may lead to a deadlock
- Incorrect parsing of scientific notation when converting `pl.String` to `pl.Decimal`
- pl.col('xxx').sort_by('xxx').rank(descending=True) doesn't equal to pl.col('xxx').rank(descending=True)
- `list.contains(None)` fails
- Docs
- Rust not yet supported