github pola-rs/polars py-1.15.0
Python Polars 1.15.0

latest release: py-1.16.0
6 days ago

🚀 Performance improvements

  • Reduce the size of row encoding UTF-8 (#19911)
  • Memoize duplicates in rolling-gb-dyn (#19939)
  • More efficient row encoding for pl.List (#19907)
  • Half the size of Booleans in row encoding (#19927)
  • Rolling 'iter_lookbehind' breeze through duplicates (#19922)
  • Initially trim leading and trailing filtered rows (#19850)

✨ Enhancements

  • Catch use of 'polars' in to_string for non-Duration dtypes and raise an informative error (#19977)
  • Add AhoCorasick backed 'find_many' (#19952)
  • Allow Python Enums as dtype inputs (#19926)
  • Speed up starts_with for small prefixes (#19904)
  • Auto-enable hive partitioning if hive_schema was given (#19902)
  • Add pl.concat_arr to concatenate columns into an Array column (#19881)
  • Support both "iso" and "iso:strict" format options for dt.to_string (#19840)
  • Add rounding for Decimal type (#19760)
  • Improved array arithmetic support (#19837)

🐞 Bug fixes

  • Fix Decimal type fill_null (#19981)
  • Fix panic on schema merge for prefiltering (#19972)
  • Fix lazy frame join expression (#19974)
  • Fix gather_every for Scalar (#19964)
  • Toggle 'fast_unique' on new_from_index (#19956)
  • Parse uppercase config keys (#19852)
  • Raise proper error message when too small interval is passed to datetime_range (#19955)
  • Fix scalar object (#19940)
  • Raise InvalidOperationError for invalid float to decimal casts (e.g. Inf, NaN) (#19938)
  • Address indexing edge-case with numpy arrays (#19895)
  • Fix panic with combination of hive and parquet prefiltering (#19905)
  • Fix panic when joining with empty frame (debug only) (#19896)
  • Fix incorrect result from inequality filter after join on LazyFrame (#19898)
  • Misleading ShapeError error message on dataframe creation (#19901)
  • Fix panic with empty delta scan, or empty parquet scan with a provided schema (#19884)
  • Ensure type object of inputs for cached any-value conversion functions are kept alive (#19866)
  • Improve export from 2D Array dtype columns to PyTorch Tensors (to_torch) and Jax Arrays (to_jax) (#19862)
  • Fix panic using scan_parquet().with_row_index() with hive partitioning enabled (#19865)
  • Improve histogram bin logic (#18761)
  • Raise informative error instead of panicking for list arithmetic on some invalid dtypes (#19841)
  • Properly handle Zero-Field Structs in row encoding (#19846)
  • Incorrect explode schema for LazyFrame.explode() (#19860)
  • DataFrame rows_by_key returning key tuples with elements in wrong order (#19486)
  • Ensure List element truncation ellipses respect ASCII* table formats (#19835)

📖 Documentation

  • Remove duplicate sentence in Series.bottom_k docstring (#19947)
  • Complete parameters description and add an example for clip() (#19875)
  • Fix some warnings during docs build (#19848)

📦 Build system

  • Use public windows runners in python release (#19982)
  • Add windows-aarch64 to python binaries (#19966)

🛠️ Other improvements

  • Minor non-breaking space ( ) tweak for HTML rendering (#19864)
  • Implement nested row encoding / decoding (#19874)
  • Switch back to PyO3 0.22 (#19851)
  • Adjust flaky with_columns test (#19844)
  • Add proper tests for row encoding (#19843)

Thank you to all our contributors for making this release possible!
@MarcoGorelli, @alexander-beedie, @barak1412, @coastalwhite, @etiennebacher, @ion-elgreco, @itamarst, @lukemanley, @mcrumiller, @mhogervo, @nameexhaustion, @orlp, @ritchie46, @stijnherfst and @stinodego

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