Rust Polars 0.26.0

⚠️ Breaking changes

• remove Series::append_array (#5681)
• iso weekday (#5598)

🚀 Performance improvements

• improve reducing window function performance ~33% (#5878)
• impove performance reducing window functions with numeric output ~-14% (#5841)
• set_sorted flag when creating from literal (#5728)
• use sorted fast path in streaming groupby (#5727)
• ensure fast_explode propagates (#5676)
• fix quadratic time complexity of groupby in stream… (#5614)
• Aggregate projection pushdown (#5556)
• improve streaming primitve groupby (#5575)
• vectorize integer vec-hash by using very simple, … (#5572)
• specialized utf8 groupby in streaming (#5535)

✨ Enhancements

• make get_any_value fallible (#5877)
• directly push all operator result into sink, prev… (#5856)
• add sink_parquet (#5480)
• Support parsing more float string representations. (#5824)
• implement mean aggregation for duration (#5807)
• implement sensible boolean aggregates (#5806)
• allow expression as quantile input (#5751)
• accept expression in str.extract_all (#5742)
• tz-aware strptime (#5736)
• Add "fmt_no_tty" feature for formatting support without r… (#5725)
• lazy diagonal concat. (#5647)
• to_struct add upper_bound (#5714)
• inversely scale chunk_size with thread count in s… (#5699)
• add streaming minmax (#5693)
• improve dynamic inference of anyvalues and structs (#5690)
• support is_in for boolean dtype (#5682)
• add a cache to strptime (#5628)
• add nearest interpolation strategy (#5626)
• make cast recursive (#5596)
• add arg_min/arg_max for series of dtype boolean (#5592)
• prefer streaming groupby if partitionable (#5580)
• make map_alias fallible (#5532)
• pl.min & pl.max accept wildcard similar to pl.sum (#5511)
• add predicate pushdown to anonymous_scan (#5467)
• make streaming work with multiple sinks in a sing… (#5474)
• add streaming slice operation (#5466)
• run partial streaming queries (#5464)
• streaming left joins (#5456)
• file statistics so we only (try to) keep smallest table in memory (#5454)
• streaming inner joins. (#5400)
• build_info() provides detailed information how polars was built (#5423)
• add missing width property to LazyFrame (#5431)
• allow regex and wildcard in groupby (#5425)
• Streaming joins architecture and Cross join implementation. (#5339)
• add support for am/pm notation in parse_dates read_csv (#5373)
• add reduce/cumreduce expression as an easier fold (#5364)

🐞 Bug fixes

• fix lazy swapping rename (#5884)
• improve equality consistency between types (#5873)
• evaluate whole branch expression to determine if r… (#5864)
• fix top_k on empty (#5865)
• fix slice in streaming (#5854)
• correct invalid type in struct anyvalue access (#5844)
• don't set fast_explode if null values in list (#5838)
• duration formatting (#5837)
• respect fetch in union (#5836)
• keep f32 dtype in fill_null by int (#5834)
• err on epoch on time dtype (#5831)
• fix panic in hmean (#5808)
• asof join by logical groups (#5805)
• fix parquet regression upstream in arrow2 (#5797)
• Fix lazy cumsum and cumprod result types (#5792)
• fix nested writer (#5777)
• fix(rust, python) Summation on empty series evaluates to Some(0) (#5773)
• empty concat utf8 (#5768)
• projection pushdown with union and asof join (#5763)
• check null values in asof_join + groupby (#5756)
• fix generic streaming groupby on logical types (#5752)
• fix date_range on expressions (#5750)
• fix dtypes in join_asof_by (#5746)
• fix group order in binary aggregation (#5744)
• implement min/max aggregation for utf8 in groupby (#5737)
• fix all_null/sorted into_groups panic (#5733)
• asof join 'by', 'forward' combination (#5720)
• fix pivot on floating point indexes (#5704)
• fix arange with column/literal input (#5703)
• fix double projection that leads to uneven union d… (#5700)
• Fix a bug in floating regex handling used in CSV type inference (#5695)
• fix asof join schema (#5686)
• fix owned arithmetic schema (#5685)
• take glob into account in scan_csv 'with_schema_mo… (#5683)
• fix boolean schema in agg_max/min (#5678)
• fix boolean arg-max if all equal (#5680)
• early error on duplicate names in streaming groupby (#5638)
• fix streaming groupby aggregate types (#5636)
• convert panic to err in concat_list (#5637)
• fix dot diagram of single nodes (#5624)
• fix dynamic struct inference (#5619)
• keep dtype when eval on empty list (#5597)
• fix ternary with list output on empty frame (#5595)
• fix tz-awareness of truncate (#5591)
• check chunks before doing chunked_id join optimiza… (#5589)
• invert cast_time_zone conversion (#5587)
• asof join ensure join column is not dropped when '… (#5585)
• fix ub due to invalid dtype on splitting dfs (#5579)
• fix(rust, python); fix projection pushdown in asof joins (#5542)
• streaming hstack allow duplicates (#5538)
• fix streaming empty join panic (#5534)
• fix duplicate caches in cse and prevent quadratic … (#5528)
• allow appending categoricals that are all null (#5526)
• tz-aware strftime (#5525)
• make 'truncate' tz-aware (#5522)
• fix coalesce expreession expansion (#5521)
• fix nested aggregatin in when then and window expr… (#5520)
• fix sort_by expression if groups already aggregated (#5518)
• fix bug in batched parquet reader that dropped dfs… (#5506)
• fix bugs in skew and kurtosis (#5484)
• compute correct offset for streaming join on multi… (#5479)
• return error on invalid sortby expression (#5478)
• add missing AnyValueBuffer specialisation for Duration dtype (#5436)
• fix freeze/stall when writing more than 2^31 string values to parquet (#5366)
• properly handle json with unclosed strings (#5427)
• fix null poisoning in rank operation (#5417)
• correct expr::diff dtype for temporal columns (#5416)
• fix cse for nested caches (#5412)
• don't set sorted flag in argsort (#5410)
• explicit nan comparison in min/max agg (#5403)
• Correct CSV row indexing (#5385)

🛠️ Other improvements

• Update rustc and fix clippy (#5880)
• update arrow (#5862)
• move join dispatch to polars-ops (#5809)
• Remove dbg statement from union (#5791)
• Continue removing compilation warnings (#5778)
• shrink anyvalue size (#5770)
• update arrow (#5766)
• chore(rust,python) Change allow_streaming to streaming (#5747)
• remove rev-map from ChunkedArray (#5721)
• simplify fast projection by schema (#5716)
• Reindent df! docs code (#5698)
• remove Series::append_array (#5681)
• Remove unused symbols and uneeded mut qualifier (#5672)
• Include license files in Rust crates (#5675)
• Use NaiveTime::from_hms_opt instead of NaiveTime::from_hms (#5664)
• use xxhash3 for string types (#5617)
• iso weekday (#5598)
• Improve contributing guide (#5558)
• streaming improvements (#5541)
• Refer to DataFrame::unique instead of distinct (#5482)
• don't panic if part of query cannot run strea… (#5458)
• make generic join builder more dry (#5439)
• use IdHash for streaming groupby generic (#5435)
• fix freeze/stall when writing more than 2^31 string values to parquet (#5366)

Thank you to all our contributors for making this release possible!
@AnatolyBuga, @CalOmnie, @Kuhlwein, @MarcoGorelli, @OneRaynyDay, @YuRiTan, @alexander-beedie, @andrewpollack, @ankane, @braaannigan, @chitralverma, @dannyvankooten, @ghais, @ghuls, @jjerphan, @matteosantama, @messense, @owrior, @pickfire, @ritchie46, @s1ck, @sa-, @slonik-az, @sorhawell, @stinodego, @universalmind303 and @zundertj