Search results

GroupBy.having quietly ignores the predicates when looped over using the object's __iter__ implementation

bugSomething isn't workingSomething isn't working

needs triageAwaiting prioritization by a maintainerAwaiting prioritization by a maintainer

pythonRelated to Python PolarsRelated to Python Polars

Status: Open.

#27364 In pola-rs/polars;

· bermondd opened on Apr 20, 2026

Data corruption when reading with cloud IO in concurrent write scenario

A-io-cloudArea: reading/writing to cloud storageArea: reading/writing to cloud storage

bugSomething isn't workingSomething isn't working

needs triageAwaiting prioritization by a maintainerAwaiting prioritization by a maintainer

pythonRelated to Python PolarsRelated to Python Polars

Status: Open.

#27362 In pola-rs/polars;

· provinzkraut opened on Apr 20, 2026

Polars 1.40.0 broke pl.concat for certain length inputs due to refactored reduce_balanced util

acceptedReady for implementationReady for implementation

bugSomething isn't workingSomething isn't working

P-highPriority: highPriority: high

pythonRelated to Python PolarsRelated to Python Polars

regressionIssue introduced by a new releaseIssue introduced by a new release

Status: Open.

#27351 In pola-rs/polars;

· mzjp2 opened on Apr 19, 2026

1.40.0: inconsistent behavior of sample() and list.sample() when fraction is > 1 and with_replacement=True

bugSomething isn't workingSomething isn't working

needs triageAwaiting prioritization by a maintainerAwaiting prioritization by a maintainer

pythonRelated to Python PolarsRelated to Python Polars

regressionIssue introduced by a new releaseIssue introduced by a new release

Status: Open.

#27344 In pola-rs/polars;

· etiennebacher opened on Apr 18, 2026

perf: LazyFrame.pivot on hive partition is slower that looping on each partition

acceptedReady for implementationReady for implementation

P-goalPriority: aligns with long-term Polars goalsPriority: aligns with long-term Polars goals

performancePerformance issues or improvementsPerformance issues or improvements

Status: Open.

#27342 In pola-rs/polars;

· FBruzzesi opened on Apr 17, 2026

Potential memory leak when sorting nested lists?

invalidA bug report that is not actually a bugA bug report that is not actually a bug

needs triageAwaiting prioritization by a maintainerAwaiting prioritization by a maintainer

pythonRelated to Python PolarsRelated to Python Polars

Status: Open.

#27339 In pola-rs/polars;

· Fufs opened on Apr 16, 2026

Casting from string to list of enums fails.

bugSomething isn't workingSomething isn't working

needs triageAwaiting prioritization by a maintainerAwaiting prioritization by a maintainer

pythonRelated to Python PolarsRelated to Python Polars

Status: Open.

#27336 In pola-rs/polars;

· gab23r opened on Apr 16, 2026

str.json_path_match returns null on invalid JSON instead of raising an error

A-io-jsonArea: reading/writing JSON filesArea: reading/writing JSON files

documentationImprovements or additions to documentationImprovements or additions to documentation

Status: Open.

#27333 In pola-rs/polars;

· nhols opened on Apr 16, 2026

Feature Request: is_unique flag for columns

enhancementNew feature or an improvement of an existing featureNew feature or an improvement of an existing feature

Status: Open.

#27331 In pola-rs/polars;

· gab23r opened on Apr 16, 2026

Memory use regression writing concatenated DataFrames to IPC format

A-io-ipcArea: reading/writing IPC filesArea: reading/writing IPC files

regressionIssue introduced by a new releaseIssue introduced by a new release

Status: Open.

#27329 In pola-rs/polars;

· adamreeve opened on Apr 16, 2026

DataType.from_python fails for list[Optional[T]]

bugSomething isn't workingSomething isn't working

needs triageAwaiting prioritization by a maintainerAwaiting prioritization by a maintainer

pythonRelated to Python PolarsRelated to Python Polars

Status: Open.

#27320 In pola-rs/polars;

· rjboczar opened on Apr 15, 2026

Incorrect parsing in pl.from_epoch when provided UNIX timestamps as UInt32

bugSomething isn't workingSomething isn't working

needs triageAwaiting prioritization by a maintainerAwaiting prioritization by a maintainer

pythonRelated to Python PolarsRelated to Python Polars

Status: Open.

#27317 In pola-rs/polars;

· marcus-maro opened on Apr 15, 2026