Python Polars 0.16.1

🏆 Highlights

• Formalize list aggregation difference between groupbys, selection and window functions (#6487)
• automagically upconvert with_columns kwarg expressions with multiple output names to struct; extend **named_kwargs support to select (#6497)

⚠️ Breaking changes

• error on string <-> date cmp (#6498)
• Formalize list aggregation difference between groupbys, selection and window functions (#6487)
• show where error messages originated (#6482)
• Remove deprecated paths from Series.__getitem__ (#6048)
• change behaviour of named rows (#6302)
• Remove deprecated read/write_json arguments (#5990)
• make schema, schema_overrides, and orient consistent on all user-facing interfaces (#6387)
• Groupby iteration now returns tuples of (name, data) (#6350)
• Remove Groupby.pivot (#6016)
• Remove deprecated argument aliases (#5993)
• Change Series.shuffle default behaviour (#5991)
• Change Expr.is_between default behaviour (#5985)
• Restrict certain function parameters to be keyword-only (#6464)

✨ Enhancements

• let cast_time_zone accept None (#6539)
• automagically upconvert with_columns kwarg expressions with multiple output names to struct; extend **named_kwargs support to select (#6497)
• add some missing type annotation in series dispatch methods (#6523)
• better errors in get_ptr and a probability on a boolean… (#6522)
• add utc parameter to strptime (#6496)
• add meta 'has_multiple_outputs', 'is_regex_projec… (#6500)
• error on string <-> date cmp (#6498)
• ~30% faster iter_rows(named=True) and to_dicts(), if pyarrow available (#6493)
• show where error messages originated (#6482)
• Remove deprecated paths from Series.__getitem__ (#6048)
• change behaviour of named rows (#6302)
• Remove deprecated read/write_json arguments (#5990)
• Groupby iteration now returns tuples of (name, data) (#6350)
• Remove Groupby.pivot (#6016)
• Remove deprecated argument aliases (#5993)
• Change Series.shuffle default behaviour (#5991)
• Change Expr.is_between default behaviour (#5985)
• Restrict certain function parameters to be keyword-only (#6464)

🐞 Bug fixes

• implement ser/de for BinaryChunked (#6543)
• on frame-init from generator, initial chunk_size cannot be smaller than infer_schema_length (#6541)
• raise if tz_localize called on UTC-aware (#6526)
• make concat_list group aware (#6527)
• error on invalid expanding expression (#6521)
• create from dicts directly as struct categorical (#6520)
• fix oob in arr.get by expressions (#6519)
• fix cse schema (#6518)
• panic when max_len -1 is reached (#6494)
• Formalize list aggregation difference between groupbys, selection and window functions (#6487)
• fix(rust, python) validate tz in with_time_zone (#6417)

🛠️ Other improvements

• Remove verify_series_and_expr_api util (#6524)
• Disable some tests for Windows (#6532)
• Remove unnecessary brackets in doc examples (#6332)
• Enable some tests for Windows (#6511)
• Fix test issue with tmp directory (#6508)
• Fix some deprecation warnings (#6495)
• added all missing examples for temporal expressions (#6488)
• Utilize pytest-xdist for faster unittests (#6483)
• test(python) I/O test improvements (#6475)
• make schema, schema_overrides, and orient consistent on all user-facing interfaces (#6387)
• improved error message from Expr on incorrect usage in boolean context (#6473)

Thank you to all our contributors for making this release possible!
@MarcoGorelli, @alexander-beedie, @gab23r, @papparapa, @ritchie46, @romanovacca, @stinodego and @zundertj