polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- read_csv with accents and uncommon characters (cp1252 encoding)
- In Rust, converting to string result in additional "\"" chars
- Reading avro file returns ComputeError: OutOfSpec in both Rust and Python
- add iter_alias for return multiple sereies
- OptState::file_caching = false causes panic with LazyCsvReader
- Implement remaining `ewm` functions (relative to `pandas`)
- date formats written in pyarrow embedded in list(struct) columns are incorrect when use_pyarrow=False
- Use approximate floating point comparisons in Rust tests
- Faster Sample Performance
- `LazyFrame::scan_parquet` takes in a `Path`, making it hard to provide custom reader implementation
- Docs
- Rust not yet supported