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Structure/unstructure decorators for classes

Status: Open.

#746 In python-attrs/cattrs;

· LecrisUT opened on Apr 13, 2026

Implement a strategy to resolve natively Sequence[X] | Y

Status: Open.

#743 In python-attrs/cattrs;

· jhominal opened on Apr 1, 2026

omit_if_default ignores attrs' converters

Status: Open.

#695 In python-attrs/cattrs;

· antony-frolov opened on Oct 28, 2025

Validation errors from multiple fields are not in ClassValidationError

validation

Status: Open.

#694 In python-attrs/cattrs;

· Lincoln-GR opened on Oct 23, 2025

Type Error with tagged Unions (working code but mypy/pyright error)

typeform

Status: Open.

#690 In python-attrs/cattrs;

· Gentle opened on Oct 15, 2025

An enum used as another enum's value is not unstructured by the json converter

Status: Open.

#679 In python-attrs/cattrs;

· reversefold opened on Aug 25, 2025

Using several factories simultaneously

Status: Open.

#659 In python-attrs/cattrs;

· AdrianSosic opened on Jun 18, 2025

Support tagged unions when the discriminator field is in a generic wrapper, not in the union type

Status: Open.

#651 In python-attrs/cattrs;

· lukasK9999 opened on May 26, 2025

Natively support more types with pre-defined optional hooks

enhancement

Status: Open.

#641 In python-attrs/cattrs;

· makukha opened on Mar 29, 2025

'_UnionGenericAlias' is deprecated and slated for removal in Python 3.17

Status: Open.

#635 In python-attrs/cattrs;

· LecrisUT opened on Mar 18, 2025

Enum misuse causes unhelpful error

Status: Open.

#601 In python-attrs/cattrs;

· AstraLuma opened on Nov 20, 2024

pyright says that type of cattrs.preconf.json.make_converter is partially unknown

Status: Open.

#593 In python-attrs/cattrs;

· declaresub opened on Oct 22, 2024