Implement maintain_order for cross join (#24665)
Add support to output dt.total_{}() duration values as fractionals (#24598)
Avoid forcing a pyarrow dependency in read_excel when using the default "calamine" engine (#24655)
Support scanning from file:/path URIs (#24603)
Log which file the schema was sourced from, and which file caused an extra column error (#24621)
Add LazyFrame.{sink,collect}_batches (#23980)
Deterministic import order for Python Polars package variants (#24531)
Add support to display lazy query plan in marimo notebooks without needing to install matplotlib or mermaid (#24540)
Add unstable hidden_file_prefix parameter to scan_parquet (#24507)
Use fixed-scale Decimals (#24542)
Add support for unsigned 128-bit integers (#24346)
Add unstable pl.Config.set_default_credential_provider (#24434)
Roundtrip BinaryOffset type through Parquet (#24344)
Add opt-in unstable functionality to load interval types as Struct (#24320)
Support reading parquet metadata from cloud storage (#24443)
Add user guide section on AWS role assumption (#24421)
Support unique / n_unique / arg_unique for array columns (#24406)

🐞 Bug fixes

Make Categories pickleable (#24691)
Shift on array within list (#24678)
Fix handling of AggregatedScalar in ApplyExpr single input (#24634)
Support reading of mixed compressed/uncompressed IPC buffers (#24674)
Overflow in slice-slice optimization (#24658)
Package discovery for setuptools (#24656)
Add type assertion to prevent out-of-bounds in GenericFirstLastGroupedReduction (#24590)
Remove inclusion of polars dir in runtime sdist/wheel (#24654)
Method dt.month_end was unnecessarily raising when the month-start timestamp was ambiguous (#24647)
Widen from_dicts to Iterable[Mapping[str, Any]] (#24584)
Fix unsupported arrow type Dictionary error in scan_iceberg() (#24573)
Raise Exception instead of panic when unnest on non-struct column (#24471)
Include missing feature dependency from polars-stream/diff to polars-plan/abs (#24613)
Newline escaping in streaming show_graph (#24612)
Do not allow inferring (-1) the dimension on any Expr.reshape dimension except the first (#24591)
Sink batches early stop on in-memory engine (#24585)
More precisely model expression ordering requirements (#24437)
Panic in zero-weight rolling mean/var (#24596)
Decimal <-> literal arithmetic supertype rules (#24594)
Match various aggregation return types in the streaming engine with the in-memory engine (#24501)
Validate list type for list expressions in planner (#24589)
Fix scan_iceberg() storage options not taking effect (#24574)
Have log() prioritize the leftmost dtype for its output dtype (#24581)
CSV pl.len() was incorrect (#24587)
Add support for float inputs for duration types (#24529)
Roundtrip empty string through hive partitioning (#24546)
Fix potential OOB writes in unaligned IPC read (#24550)
Fix regression error when scanning AWS presigned URL (#24530)
Make PlPath::join for cloud paths replace on absolute paths (#24514)
Correct dtype for cum_agg in streaming engine (#24510)
Restore support for np.datetime64() in pl.lit() (#24527)
Ignore Iceberg list element ID if missing (#24479)
Fix panic on streaming full join with coalesce (#23409)
Fix AggState on all_literal in BinaryExpr (#24461)
Show IR sort options in explain (#24465)
Benchmark CI import (#24463)
Fix schema on ApplyExpr with single row literal in agg context (#24422)
Fix planner schema for dividing pl.Float32 by int (#24432)
Fix panic scanning from AWS legacy global endpoint URL (#24450)
Fix iterable_to_pydf(..., infer_schema_length=None) to scan all data (#23405)
Do not propagate struct of nulls with null (#24420)
Be stricter with invalid NDJSON input when ignore_errors=False (#24404)
Implement approx_n_unique for temporal dtypes and Null (#24417)

📖 Documentation

Add default parquet compression levels (#24686)
Fix syntax error in data-types-and-structures.md (#24606)
Rename avg_birthday -> avg_age in examples aggregation (#23726)
Update Polars Cloud user guide (#24366)
Fix typo in set_expr_depth_warning docstring (#24427)

📦 Build system

Python pre-release 1.34.0b5 (#24699)
Use cargo-run to call dsl-schema script (#24607)

🛠️ Other improvements

Restructure python project directories again (#24676)
Use IR for polars-expr output field resolution (#24661)
Remove dist/ from release python workflow (#24639)
Escape sed ampersand in release script (#24631)
Remove PyOdide from release for now (#24630)
Fix sed in-place in release script (#24628)
Release script pyodide wheel (#24627)
Release script pyodide wheel (#24626)
Update release script for runtimes (#24610)
Remove unused UnknownKind::Ufunc (#24614)
Use cargo-run to call dsl-schema script (#24607)
Cleanup and prepare to_field for element and struct field context (#24592)
Resolve nightly clippy hints (#24593)
Rename pl.dependencies to pl._dependencies (#24595)
More release scripting (#24582)
Again a minor fix for the setup script (#24580)
Minor fix in release script (#24579)
Correct release python beta version check (#24578)
Python dependency failure (#24576)
Always install yq (#24570)
Deterministic import order for Python Polars package variants (#24531)
Check Arrow FFI pointers with an assert (#24564)
Add a couple of missing type definitions in python (#24561)
Fix quickstart example in Polars Cloud user guide (#24554)
Add implementations for loading min/max statistics for Iceberg (#24496)
Update versions (#24508)
Add additional unit tests for pl.concat (#24487)
Refactor parametric tests for as_struct on aggstates (#24493)
Use PlanCallback in name.map_* (#24484)
Pin xlsvwriter to 3.2.5 or before (#24485)
Add dataclass to hold resolved iceberg scan data (#24418)
Fix iceberg test failure in CI (#24456)
Move CompressionUtils to polars-utils (#24430)
Update github template to dispatch to cloud client (#24416)

Thank you to all our contributors for making this release possible! @DeflateAwning, @Gusabary, @JakubValtar, @Kevin-Patyk, @MarcoGorelli, @Matt711, @alexander-beedie, @alonsosilvaallende, @borchero, @c-peters, @camriddell, @coastalwhite, @dangotbanned, @deanm0000, @dongchao-1, @dsprenkels, @eitsupi, @itamarst, @jan-krueger, @joshuamarkovic, @juansolm, @kdn36, @moizescbf, @nameexhaustion, @orlp, @r-brink, @ritchie46 and @stijnherfst