polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- `replace` on a struct with 1 field replaces the inner value
- feat(python): Add utility to read and concatenate valid structured files from a path patternFix Enable reading an empty file
- Inconsistency on `pl.len()` for 1-column CSV with BOM and blank line (fast_count)
- Expand ewm expressions
- Cannot partition files in S3
- Explicit `engine` argument to `LazyFrame.collect` is overridden by `"streaming"` engine affinity
- LazyFrame sink_csv: batch_size and sync_on_close are not respected
- JSON column order non-deterministic with more than 32 columns
- Full slice pushdown for io plugins
- Markdown table output does not have padding on header delimiter row
- Docs
- Rust not yet supported