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Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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Polars py-0.17.3

Polars: py-0.17.3 Release

Release date:
April 15, 2023
Previous version:
py-0.17.2 (released April 11, 2023)
Magnitude:
8,094 Diff Delta
Contributors:
12 total committers
Data confidence:
Commits:
49 impacting commits

49 Commits in this Release

Ordered by the degree to which they evolved the repo in this version.

feat(rust, python): better algorithm for streaming unique (#8003)
Authored April 13, 2023
fix(rust, python): improve null/empty list construction (#8255)
Authored April 15, 2023
feat(rust, python): add `use_earliest` argument to `replace_time_zone` for dealing with ambiguous datetimes (#8087)
Authored April 15, 2023
feat(python): support `DataFrame` init from nested `dataclass`, `pydantic`, and `NamedTuple` objects (#8185)
Authored April 13, 2023
feat(python): support `DataFrame` init from `pydantic` model data (#8178)
Authored April 12, 2023
refactor(python, rust): Rename `strptime`/`strftime` args (#8221)
Authored April 14, 2023
test(python): vendor the py3.10 version of `TemporaryDirectory` for use with unit tests (#8158)
Authored April 12, 2023
perf(rust, python): fail fast on non-inferable strings in strptime if no `fmt` is provided (#8111)
Authored April 15, 2023
perf(rust, python): SIMD accelerated `arg_min`/`arg_max` (via `argminmax`) (#8074)
Authored April 14, 2023
perf(rust, python): `arr.eval` run on groupby expression engine when possible (#8199)
Authored April 13, 2023
refactor(rust): introduce `FieldsMapper` utility class for obtaining `FunctionExpr` schema (#8175)
Authored April 14, 2023
fix(rust, python): nested struct logical type consistency (#8249)
Authored April 15, 2023
feat(rust): `DatetimeArgs` ergonomics (#8133)
Authored April 12, 2023
feat(rust): implement `FunctionExpr` for bound and round methods (#8172)
Authored April 12, 2023
feat(python): automatically convert `series OP expr` -> `pl.lit(series) OP expr` where OP is arithmetic (#8225)
Authored April 14, 2023
refactor(python,rust): Rename `Expr.list` to `implode` (#8165)
Authored April 14, 2023
feat(python): add pickle support for `LazyFrame` (#8220)
Authored April 14, 2023
fix(rust): ensure cached nodes are initialized once (#8103)
Authored April 13, 2023
feat(sql, rust, python): SQL CTE's (#8208)
Authored April 14, 2023
refactor(python): parametric/hypothesis testing code cleanups (#8253)
Authored April 15, 2023
refactor(python): minor updates for `describe` percentiles (#8189)
Authored April 12, 2023
feat(python): add percentiles to `describe` methods (#8169)
Authored April 12, 2023
feat(rust): adopt `FunctionExpr` for `cat` namespace (#8173)
Authored April 12, 2023
chore(rust): remove unused list_construction (#8197)
Authored April 13, 2023
perf(rust, python): speed up csv parsing for slower datetimes formats (#8213)
Authored April 14, 2023
feat(rust, python): add duration cumsum and remainder (#8219)
Authored April 14, 2023
fix(rust, python): fix boolean par materialization (#8257)
Authored April 15, 2023
tests(python): fix potential overflow in testing asserts for 'atol' with unsigned ints (#8198)
Authored April 13, 2023
fix(rust, python): decimal ensure backed arrow arrays have correct dtype (#8193)
Authored April 13, 2023
chore(rust, python): don't panic on err in offset_by (#8210)
Authored April 14, 2023
perf(python): improve datetime interpret perf (#8209)
Authored April 13, 2023
feat(python): fail loudly on .%f directive, as it differs from the Python standard library (#8237)
Authored April 14, 2023
fix(python): add special numpy float branch in anyvalue conversion (#8259)
Authored April 15, 2023
doc(python): document how to offset by 1 "month end" (#8248)
Authored April 15, 2023
refactor(rust, python): change sampling ratio for groupby strategy (#8223)
Authored April 14, 2023
fix(rust, python): fix offsets in parallel utf8 materialization (#8254)
Authored April 15, 2023
feat(rust, python): display skipped row if same number of rows (#8170)
Authored April 12, 2023
fix(rust, python): keep literal state if elementwise function is applied (#8195)
Authored April 13, 2023
perf(python): ~2-3x speedup for `DataFrame` init from `pydantic` models (#8181)
Authored April 12, 2023
chore(python): remove unused dtype_to_arrow_type (#8177)
Authored April 12, 2023

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Top Contributors in py-0.17.3

ritchie46
alexander-beedie
MarcoGorelli
borchero
stinodego
jvdd
rben01
josh
universalmind303
ghuls

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Release Notes Published

πŸ† Highlights

  • support DataFrame init from pydantic model data (#8178)

πŸš€ Performance improvements

  • fail fast on non-inferable strings in strptime if no fmt is provided (#8111)
  • make chunks search more resilient (#8229)
  • SIMD accelerated arg_min/arg_max (via argminmax) (#8074)
  • speed up csv parsing for slower datetimes formats (#8213)
  • improve datetime interpret perf (#8209)
  • arr.eval run on groupby expression engine when possible (#8199)
  • ~2-3x speedup for DataFrame init from pydantic models (#8181)

✨ Enhancements

  • add use_earliest argument to replace_time_zone for dealing with ambiguous datetimes (#8087)
  • fail loudly on .%f directive, as it differs from the Python standard library (#8237)
  • SQL CTE's (#8208)
  • automatically convert series OP expr -> pl.lit(series) OP expr where OP is arithmetic (#8225)
  • add pickle support for LazyFrame (#8220)
  • add duration cumsum and remainder (#8219)
  • support DataFrame init from nested dataclass, pydantic, and NamedTuple objects (#8185)
  • better algorithm for streaming unique (#8003)
  • Add approx distinct count via approx_unique() (#7937)
  • add percentiles to describe methods (#8169)
  • support DataFrame init from pydantic model data (#8178)
  • display skipped row if same number of rows (#8170)

🐞 Bug fixes

  • add special numpy float branch in anyvalue conversion (#8259)
  • fix boolean par materialization (#8257)
  • improve null/empty list construction (#8255)
  • fix offsets in parallel utf8 materialization (#8254)
  • nested struct logical type consistency (#8249)
  • keep literal state if elementwise function is applied (#8195)
  • decimal ensure backed arrow arrays have correct dtype (#8193)

πŸ› οΈ Other improvements

  • parametric/hypothesis testing code cleanups (#8253)
  • Rename strptime/strftime args (#8221)
  • change sampling ratio for groupby strategy (#8223)
  • Rename Expr.list to implode (#8165)
  • don't panic on err in offset_by (#8210)
  • re-enable test parallization for Windows tests (#8214)
  • Fix small typo: "im memory" -> "in memory" (#8187)
  • remove unused dtype_to_arrow_type (#8177)

Thank you to all our contributors for making this release possible! @MarcoGorelli, @alexander-beedie, @avimallu, @borchero, @chitralverma, @clickingbuttons, @ghuls, @josh, @jvdd, @rben01, @ritchie46, @stinodego and @universalmind303

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