Python Polars 1.15.0

🚀 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