polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- df.write_csv(filepath.csv) raise panicError
- `ewm_mean` doesn't yield a result for missing values (but `rolling_mean` does)
- Polars 0.47 - failed on async with lazy reader
- Drop PyArrow requirement for database IO functions with ADBC driver
- Creating dataframe from Python dict with array as value ignores/loses values when starting with None
- Issue with Polars and DigitalOcean S3 compatible buckets using scan_parquet
- Optimizer: Fused filter & slice pushdown
- `partition_chunk_size_bytes` no longer has effect when writing partitioned Parquet
- add `get_value` in `KeyedPartitionContext`
- `is_in` incorrectly filters when column is `Datetime(ns)` and values are a list of python datetime objects
- Docs
- Rust not yet supported