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Published April 8, 2024 | Version py-0.20.19
Software Open

pola-rs/polars: Python Polars 0.20.19

Authors/Creators

  • 1. @pola-rs
  • 2. Quansight
  • 3. @alibaba
  • 4. @aertslab
  • 5. University of California, Berkeley
  • 6. @coralogix
  • 7. Munin Data ApS
  • 8. @QuantCo
  • 9. forml.eu
  • 10. @Quantco
  • 11. ASML

Description

🚀 Performance improvements

  • Replace std::thread spawn with tokio block_in_place (#15517)
  • speed up offset_by when a single offset is passed (#15493)
  • Avoid allocation in the hot path for struct JSON serialization (#15449)

✨ Enhancements

  • Support list group-by of non numeric lists (#15540)
  • add business_day_count function (#15512)
  • Add SQL support for MEDIAN aggfunc (#15519)
  • Implement string, boolean and binary dtype in top_k (#15488)
  • Add SQL support for TRUNCATE TABLE command (#15513)
  • Add SQL support for GREATEST and LEAST (#15511)
  • Allow specifying Hive schema in read/scan_parquet (#15434)
  • Implements agg_list for NullChunked (#15439)

🐞 Bug fixes

  • dot product of two integer series is cast to float (#15502)
  • Resolve function names and prune all aliases. (#15522)
  • Pass skip_rows_after_header to pyarrow csv reader (#15533)
  • No longer error when schema_overrides contains nonexistent columns (#15528)
  • list.get should take validity into account (#15516)
  • block decimal in streaming (#15520)
  • group_by partitioned with literal Series panic (#15487)
  • Initialize validity for GroupsProxy::Slice windows (#15509)
  • Fix struct name resolving (#15507)
  • pow return type evaluation (#15506)
  • Address issue with read_database draining iter_batches early (#15504)
  • Allow selectors inside frame-level .filter() (#15445)
  • Don't prune alias in AnonymousFunction subtree (#15453)
  • Raise if pass a negative n into clear (#15432)
  • Fix deadlock in async parquet scan (#15440)

📖 Documentation

  • Update leftover references of by parameter to group_by in DataFrame/LazyFrame.upsample/group_by_dynamic/rolling (#15527)
  • Add make docs command, DataType docs/layout tweak, minor README updates (#15386)
  • Add example for Series.list.median. (#15451)

🛠️ Other improvements

  • Remove unused code paths in read_parquet (#15532)
  • Organize utils for I/O functionality (#15529)
  • Remove private DataFrame._read classmethods (#15521)
  • Move dedicated inference code out of io.database executor module (#15526)
  • Add unstable warning to hive_schema functionality (#15508)

Thank you to all our contributors for making this release possible! @CanglongCl, @ChayimFriedman2, @MarcoGorelli, @alexander-beedie, @cmdlineluser, @dependabot, @dependabot[bot], @henryharbeck, @mbuhidar, @nameexhaustion, @reswqa, @ritchie46, @rob-sil and @stinodego

Files

pola-rs/polars-py-0.20.19.zip

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Additional details

Related works

Is supplement to
Software: https://github.com/pola-rs/polars/tree/py-0.20.19 (URL)