pola-rs/polars py-1.1.0

Python Polars 1.1.0

on GitHub

🚀 Performance improvements

• Keep more parallelism when CSE plan cache hits (#17463)
• Batch parquet primitive decoding (#17462)
• Respect allow_threading in some more operators (#17450)
• Parallelize parquet metadata deserialization (#17399)
• Use underlying fileno for Python files when possible (#17315)
• Add future arg to Series.to_arrow (#17371)

✨ Enhancements

• Add "future" versioning (#17421)
• Apply slice pushdown immediately to in-memory frames (#17459)
• Support writing hive partitioned parquet (#17324)
• Add right join support (#17441)
• Support hive partitioning in scan_ipc (#17434)
• Improve error message when passing string key to Series.__getitem__ (#17408)

🐞 Bug fixes

• Handle DB cursor descriptions that contain more fields than the DBAPI2 standard (#17468)
• Fix decimal dyn float supertype (#17464)
• Verify the integrity of pandas column names before implied string conversion (#17433)
• Don't rechunk on phys_repr (#17461)
• Harden alchemy session for old sqlalchemy versions (#17366)
• Fix swapping rename schema (#17458)
• Make boolean reads consistent across all read_excel engines (#17448)
• Raise on oob decimal precision (#17445)
• Fix handling of TextIOWrapper in write_csv (#17328)
• Support sa session (#17435)
• Fix from_pandas for string columns with missing values (#17397)
• Fix a global variable table-discovery edge case for the SQL interface (#17400)
• Don't allow json inference method to be chunked/streaming (#17396)
• Set literal nesting to 0 (#17392)
• Fix scanning cloud paths with spaces (#17379)
• Fix slice length no longer allowing None (#17372)
• Fix typo in SchemaError exception message (#17350)
• Raise proper error for mismatching parquet schema instead of panicking (#17321)

📖 Documentation

• Add examples for scanning hive datasets to user guide (#17431)
• Update partition_by docstring to match new behavior (#17394)
• Update GroupBy.__iter__ docstring to match new behavior (#17383)

📦 Build system

• Add support for NumPy 2.0 (#17384)

🛠️ Other improvements

• Add automated check for PR title formatting (#17412)
• Remove transmute for object store path (#17395)
• Fix Python version resolver in release drafter (#17390)
• Avoid use of np.trapz in tests to prepare for NumPy 2.0 (#17387)
• Avoid writing to disk when running sink_csv test (#17386)

Thank you to all our contributors for making this release possible!
@alexander-beedie, @brunobbaraujo, @cmdlineluser, @coastalwhite, @dependabot, @dependabot[bot], @nameexhaustion, @orlp, @phi-friday, @ritchie46, @ruihe774, @sherlockbeard, @stinodego, @tylerriccio33 and @wence-