github pola-rs/polars py-0.20.18
Python Polars 0.20.18

latest release: py-0.20.19
11 days ago

🚀 Performance improvements

  • CSV reading memory usage tests and fixes (#15422)
  • avoid double-allocation in rolling_apply_agg_window (#15423)
  • Make LogicalPlan immutable (#15416)
  • Add non-order preserving variable row-encoding (#15414)
  • Use row-encoding for multiple key group by (#15392)

✨ Enhancements

  • Supports explode_by_offsets for decimal (#15417)
  • Add read_clipboard and DataFrame.write_clipboard (#15272)
  • Add null_on_oob parameter to expr.list.get (#15395)
  • make Series.__bool__ error message Rusttier (#15407)
  • CSV-writer escape carriage return (#15399)

🐞 Bug fixes

  • datetime operations (e.g. .dt.year) were raising when null values were backed by out-of-range integers (#15420)
  • Ensure Binary -> Binview cast doesn't overflow the buffer size (#15408)
  • Don't prune alias in function subtree (#15406)
  • Return 0 for n_unique() in group-by context when group is empty (#15289)
  • Unset UpdateGroups after group-sensitive expression (#15400)
  • to_any_value should supports all LiteralValue type (#15387)
  • Hash failure combining hash of two numeric columns containing equal values (#15397)
  • Add FixedSizeBinary to arrow field conversion (#15389)
  • Conversion of expr_ir in partition fast path (#15388)
  • fix panic when doing a scan_parquet with hive partioning (#15381)
  • sort for series with unsupported dtype should raise instead of panic (#15385)

📖 Documentation

  • Added example for explode mapping strategy in pl.Expr.over (#15402)
  • Add outer_coalesce join strategy in the user guide (#15405)
  • Change the example to series for series/array.py (#15383)
  • Add "See Also" for arg_sort and arg_sort_by (#15348)

🛠️ Other improvements

  • make dsl immutable and cheap to clone (#15394)
  • use recursive crate, add missing recursive tag (#15393)
  • Update CODEOWNERS (polars-sql) (#15384)

Thank you to all our contributors for making this release possible!
@CanglongCl, @JamesCE2001, @MarcoGorelli, @Sol-Hee, @alexander-beedie, @dependabot, @dependabot[bot], @itamarst, @kszlim, @mcrumiller, @nameexhaustion, @orlp, @reswqa, @ritchie46, @rob-sil and @thomaslin2020

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