polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- `PartitionByKey` doesn't work when using untyped literals
- using rust add a schema override on a column and force a column to be a String when reading a CSV file
- Switch `multiprocessing.dummy` to `concurrent.futures`?
- `collect_all` uses too much memory on complex graph and large LazyFrame count
- Document environmental variables in the User Guide
- Lazy `map_groups` docs mention `apply`
- Overriding asyncio.run() in _patch_asyncio() does not match signature in Python >= 3.12
- Cast from `decimal[38,9]` to `Int64` is unexpectedly rounding some values
- Improve error message when concatenating two lazyframes with different schemas
- Streaming engine does not raise on length mismatch in `over`
- Docs
- Rust not yet supported