quote style option for csv writer (#10422)
add "raise_if_empty" flag to read_excel, read_csv, scan_csv, and read_csv_batched (#10409)
be more permissive on predicate pushdown to left side of left join (#10442)
add use_earliest to to_datetime / strptime (#10426)
{any/all}_horizontal to expression architecture (#10412)
serialize flags (#10140)
allow unaligned pointers in arrow FFI (#10403)
add line_terminator option to write_csv (#10373)
Add is_local and to_local to categorical namespace (#10372)
cse for groupby.agg and reduced cse collisions (#10381)
re-use regex capture allocation (#10302) (#10335)
Add Series.cat.uses_lexical_ordering (#10325)
improve datetime parsing error message (#10332)
allow sequential runners in select/with_columns (#10322)
improve err msg parsing time, date, datetime (#10298)
Add str.extract_groups (#10179)
add extra build profiles (#10268)
Extend datetime expression function with time zone/time unit parameters (#10235)
added gcs to gcp cloud schema in polars-core::cloud #10206. (#10207)
support writing duration type in json (#10112)
inline lit(Series).cast(..) to -> lit(Series.cast(..)) (#10092)
Move transpose naming to Rust (#10009)
cse in groupby's (#10062)
Adds sql CASE statement expressions (#10065)
Add date_ranges/time_ranges expression functions (#10005)
comm_subexpr_elim in streaming 'select/with_columns' (#10050)
common subexpression elemination (#9632)
Let qcut create evenly spaced probabilities (#9960)
sorted flag on singletons (#9933)
maintain sorted flag after partition_by (#9944)
keep sorted flag in streaming left join (#9932)
Add cloudpickle for serializing python UDFs (#9921)

🐞 Bug fixes

Fix incorrect handling of VisitRecursion::Skip. (#10452)
fix negative decimal parsing (#10444)
ensure sorted_sink hash equals the default path (#10464)
fix sum agg (#10459)
ensure last aggregation deals with default chunk (#10453)
fix cse input schema (#10450)
fix list groupby of array dtype (#10408)
correct AnyValue::hash (#10391)
finalize cast in partitioned groupby (#10359)
fix oob in 'last' (#10329)
fix categorical lexical sort (#10318)
Fix join validation (#10257)
Set correct dtype for .extract_groups() (#10306)
clear window cache and run windows on proper runners (#10303)
fix sorted fast path in streaming groupby wrt nulls (#10289)
fix nan aggregation in groupby (#10287)
check dtypes of single-column 'by' parameter in asof-join (#10284)
fix pyo3 link errors on macos (#10256)
fix empty streaming parquet file (#10252)
fix logical columns of streaming multi-column sort (#10250)
fix date/datetime parsing for short inputs with exact=False (#10231)
correct agg_sum for ChunkedArray. (#10243)
don't panic in wildcard apply (#10240)
fix cse profile (#10239)
correct struct null counts (#10142)
no cse in groupby until fixed (#10216)
fix is_in on empty series (#10195)
fix cse windows (#10197)
block predicate pushdown is_in and null producing … (#10194)
prevent re-ordering of dict keys inside .apply (#10172)
initialize fixed null values (#10192)
ensure window function run partitioned when cse is hit (#10170)
adjust for null values in str.replace fast path (#10132)
clear bit settings in list iteration (#10131)
use row-encoded for struct::is_sorted (#10129)
fix(rust, python): don't run file-caching in streaming mode (#10117)
Allow initialize of pl.Array in Dataframe using schema alone (#10100)
don't panic if masked out values are invalid in temporal kernels (#10114)
Fix struct get field by index out of bounds error. (#10097)
fix ub in simd-json (#10093)
fix invalid access when groupby rolling produces empty sets (#10109)
respect null_on_oob=False in list.take when pa… (#10105)
fix is_sorted for structs (#10099)
add file path to io error in scan_csv (#10076)
fix false positive in parquet stats evaluation (#10087)
fix error message from cast-timezone to replace-time-zone (#10089)
Address .col(regex).exclude() operations not executing. (#10025)
fix Boolean::isin(null values) (#10074)
predicate pushdown #10058 (#10071)
Fix weighted quantile for 0 weights (#10051)
fix incorrect state in projection pushdown with joins (#9987)
don't pass predicates referring to renamed literal… (#9965)
fix regression in regex expansion (#9952)
potential SO in csv infer schema (#9950)
raise on unsupported transpose and object types (#9946)
Fix as-of join when by groups are interleaved (#9938)

🛠️ Other improvements

fix and run polars-plan tests (#10465)
Simplify flag methods (#10429)
match_block_trailing_comma (#10414)
implement ChunkArray::(try_)from_chunk_iter (#10395)
add test for 10401 (#10405)
Bump some dependencies (#10396)
Move dependency version info to workspace level (#10295)
patch reedline until fix released (#10382)
remove wasm-timer dependency (#10347)
write down invariants of ChunkedArray (#10334)
fix typo in lib.rs (#10313)
Exclude examples from workspace default (#10309)
Update CODEOWNERS (#10261)
avoid outputting docs of dependencies (#10292)
Do not keep history in gh-pages branch (#10282)
Use workspace package info / organize dependencies section (#10279)
fix dead links in Rust documentation (#10251)
Fix make pre-commit command (#10205)
Fix make integration-tests command (#10202)
Replace "question" issues with link to Stack Overflow (#10230)
Update dependabot config (#10222)
Fix LICENSE symlink for moved crates (#10150)
Re-organize folder structure for Rust crates (#10141)
update to rustc nightly-2023-07-27 (#10139)
temporarily turn off fail-fast so that ubuntu tests run (#10133)
Refactor when/then/otherwise internals (#9922)
move replace_time_zone to polars-ops (#10078)
remove unneeded branch (#10082)
remove deprecate tz_localize, name CastTimezone to ReplaceTimeZone (#10070)
fix typo in contribution example (#10038)
correct example in API reference (#10032)
add developer contribution examples (#10013)
Update autolabeler again (#9984)
fix docs build and add to CI (#9904)
Minor makeover for Rust Makefile (#9874)

Thank you to all our contributors for making this release possible! @0xbe7a, @CanglongCl, @JulianCologne, @MarcoGorelli, @OndrejSlamecka, @OneRaynyDay, @SeanTroyUWO, @StefanBRas, @TLouf, @alexander-beedie, @c-peters, @cjackal, @cmdlineluser, @dependabot, @dependabot[bot], @drgif, @duvenagep, @eltociear, @fsimkovic, @ion-elgreco, @jonashaag, @lfn3, @magarick, @mcrumiller, @orlp, @potzenhotz, @rea1bacon, @reswqa, @rikkaka, @ritchie46, @stinodego, @thomasaarholt, @varunmittal91 and @zundertj