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Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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Polars py-0.16.14

Polars: py-0.16.14 Release

Release date:
March 17, 2023
Previous version:
py-0.16.13 (released March 13, 2023)
Magnitude:
6,301 Diff Delta
Contributors:
7 total committers
Data confidence:
Commits:
44 impacting commits

44 Commits in this Release

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

refactor(python): Avoid `pli` in type hints (part 1) (#7586)
Authored March 16, 2023
refactor(python): Move more code out of `internals` (#7597)
Authored March 16, 2023
fix(rust, python): Fix regression throwing AmbiguousTimeError in groupby_dynamic (#7454)
Authored March 16, 2023
fix(python): remove pyarrow from construction and dispatch to rust (#7551)
Authored March 15, 2023
perf(rust, python): improve perf or `str.replace_n` and add `n` argument `~10x` (#7575)
Authored March 15, 2023
refactor(python): Minor Series cleanup (#7531)
Authored March 14, 2023
fix(python): fix negative indexing for `head`/`tail` (#7554)
Authored March 15, 2023
refactor(python): Move core objects to top level (#7576)
Authored March 16, 2023
perf(python): reinstate fast module import and optimise `DataFrame` init by implementing dynamic `singledispatch` registration (#7559)
Authored March 16, 2023
refactor(rust): abstract memory collection in sinks (#7560)
Authored March 15, 2023
fix(python,rust): sql window functions (#7458)
Authored March 15, 2023
feat(python,rust): slightly more space-efficient table output (use ellipsis char, not three periods) (#7599)
Authored March 17, 2023
perf(python): even faster polars module import (~15%) (#7584)
Authored March 16, 2023
chore(rust): fix a bunch of cargo warnings & errors (#7549)
Authored March 15, 2023
perf(rust, python): optimize string kernels, (elide redundant allocs) (#7602)
Authored March 17, 2023
perf(rust, python): optimize `str_replace` for same length replacements `~2x` (#7580)
Authored March 16, 2023
perf(rust, python): set sorted flags (#7558)
Authored March 15, 2023
chore(rust): factor out some utils into polars-time/src/utils (#7562)
Authored March 15, 2023
fix(rust, python): fix ooc sort. the fast path was invalid (#7588)
Authored March 16, 2023
ci(rust): Use pre-installed rustup (#7544)
Authored March 14, 2023
refactor(python): Rename `sep` arg to `separator` (#7533)
Authored March 14, 2023
perf(rust, python): speedup `replace_literal_all` of single byte replacements `~15x`. (#7565)
Authored March 15, 2023
docs(python): add a performance hint about use of `lru_cache` to the `apply` docstrings (#7593)
Authored March 16, 2023
refactor(rust): mark `DataFrame.get_columns_mut` as unsafe (#7557)
Authored March 15, 2023
fix(rust, python): respect time zone in upsample (#7563)
Authored March 15, 2023
fix(rust, python): fix rolling windows for windows that shrink from lhs (#7556)
Authored March 15, 2023
fix(python): fix logical/list getitem (#7545)
Authored March 14, 2023
feat(rust, python): implement decimal -> dtype cast (#7600)
Authored March 17, 2023
fix memory tracing in sort sink (#7569)
Authored March 15, 2023
fix(rust, python): don't upcast column to string in 'is_in' operation (#7538)
Authored March 14, 2023
feat(rust, python): overwrite streaming chunk size (#7543)
Authored March 14, 2023
perf(python): extend ultrafast constant-value frame init to temporal types (over 1,000x speedup) (#7527)
Authored March 13, 2023
fix(rust, python): pushdown key in merge sorted projection pd (#7542)
Authored March 14, 2023
feat(python): use head on pyarrow datasets (#7570)
Authored March 15, 2023
fix(rust, python): activate dtype-duration for polars-ops (#7582)
Authored March 16, 2023
fix(rust, python): distinct project whole schema if not a subset (#7581)
Authored March 16, 2023
fix(python): Remove `BatchedCsvReader` from public API (#7546)
Authored March 14, 2023
fix(rust, python): add decimal chunk_lengths (#7589)
Authored March 16, 2023
test(python): Move `fmt` tests to `test_fmt` (#7555)
Authored March 15, 2023
fix(rust): Enable link to DateLikeNameSpace in the docs. (#7526)
Authored March 13, 2023

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Top Contributors in py-0.16.14

stinodego
ritchie46
MarcoGorelli
alexander-beedie
universalmind303
vincev
Vincenthays

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Release Notes Published

πŸš€ Performance improvements

  • optimize string kernels, (elide redundant allocs) (#7602)
  • even faster polars module import (~15%) (#7584)
  • optimize str_replace for same length replacements ~2x (#7580)
  • reinstate fast module import and optimise DataFrame init by implementing dynamic singledispatch registration (#7559)
  • improve perf or str.replace_n and add n argument ~10x (#7575)
  • speedup replace_literal_all of single byte replacements ~15x. (#7565)
  • set sorted flags (#7558)
  • extend ultrafast constant-value frame init to temporal types (over 1,000x speedup) (#7527)

✨ Enhancements

  • slightly more space-efficient table output (use ellipsis char, not three periods) (#7599)
  • implement decimal -> dtype cast (#7600)
  • use head on pyarrow datasets (#7570)
  • overwrite streaming chunk size (#7543)

🐞 Bug fixes

  • remove index columns in pandas to_sql() (#7596)
  • add decimal chunk_lengths (#7589)
  • fix ooc sort. the fast path was invalid (#7588)
  • Fix regression throwing AmbiguousTimeError in groupby_dynamic (#7454)
  • activate dtype-duration for polars-ops (#7582)
  • distinct project whole schema if not a subset (#7581)
  • reinstate fast module import and optimise DataFrame init by implementing dynamic singledispatch registration (#7559)
  • sql window functions (#7458)
  • respect time zone in upsample (#7563)
  • fix rolling windows for windows that shrink from lhs (#7556)
  • remove pyarrow from construction and dispatch to rust (#7551)
  • fix negative indexing for head/tail (#7554)
  • Remove BatchedCsvReader from public API (#7546)
  • fix logical/list getitem (#7545)
  • pushdown key in merge sorted projection pd (#7542)
  • don't upcast column to string in 'is_in' operation (#7538)

πŸ› οΈ Other improvements

  • Move more code out of internals (#7597)
  • add a performance hint about use of lru_cache to the apply docstrings (#7593)
  • Avoid pli in type hints (part 2) (#7587)
  • Avoid pli in type hints (part 1) (#7586)
  • Move core objects to top level (#7576)
  • Bump ruff (#7567)
  • Rename namespace Array -> List in docs (#7541)
  • Move fmt tests to test_fmt (#7555)
  • Rename sep arg to separator (#7533)
  • Minor Series cleanup (#7531)

Thank you to all our contributors for making this release possible! @MarcoGorelli, @Vincenthays, @alexander-beedie, @ritchie46, @stinodego, @universalmind303 and @vincev

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