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Schema-level dtype cannot be serialized: to_yaml raises RepresenterError, to_json raises TypeError

Status: Open.

#2511 In unionai-oss/pandera;

· owgreen-dev opened on Sep 20, 2026

Column default is dropped by to_yaml/to_json, so add_missing_columns stops accepting frames after a round trip

Status: Open.

#2510 In unionai-oss/pandera;

· owgreen-dev opened on Sep 20, 2026

CI: the python-3.11 macos-latest pyspark job dies with OutOfMemoryError: unable to create native thread

Status: Open.

#2509 In unionai-oss/pandera;

· Rodrigo-Palma opened on Sep 19, 2026

Check.unique_values_eq cannot be serialized: to_yaml raises RepresenterError, to_json raises TypeError (frozenset)

Status: Open.

#2505 In unionai-oss/pandera;

· owgreen-dev opened on Sep 19, 2026

MultiIndex options (strict, ordered, coerce, unique, name) are dropped by to_yaml/to_json/to_script, so a reloaded schema enforces different constraints

Status: Open.

#2503 In unionai-oss/pandera;

· owgreen-dev opened on Sep 19, 2026

[bug] Decimal scale guard checks only the upper bound, so a negative scale leaks "Format specifier missing precision"

Status: Open.

#2496 In unionai-oss/pandera;

· feiiiiii5 opened on Sep 18, 2026

@check_types raises AttributeError on any DataFrame[T] annotation where T is a TypeVar

bugSomething isn't workingSomething isn't working

Status: Open.

#2491 In unionai-oss/pandera;

· sofeikov opened on Sep 17, 2026

ShapeError on polars pre-release

bugSomething isn't workingSomething isn't working

Status: Open.

#2482 In unionai-oss/pandera;

· MariusMerkleQC opened on Sep 10, 2026

Drop typing_inspect in favor of typing-inspection

enhancementNew feature or requestNew feature or request

Status: Open.

#2475 In unionai-oss/pandera;

· sk- opened on Sep 7, 2026

User-declared parsers are silently ignored on the polars backend

Status: Open.

#2472 In unionai-oss/pandera;

· feiiiiii5 opened on Sep 6, 2026

Feature request: support Pydantic v2-style model_config: ConfigDict in addition to nested class Config

enhancementNew feature or requestNew feature or request

Status: Open.

#2419 In unionai-oss/pandera;

· Iberlauf opened on Jul 24, 2026

Document pandera with mkdocs

enhancementNew feature or requestNew feature or request

Status: Open.

#2388 In unionai-oss/pandera;

· brynpickering opened on Jun 23, 2026