attrs

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The following libraries build on attrs to provide additional functionality or have special support for attrs classes:

attrs2bin: Binary serializer for attrs-based classes.
attrs-strict: runtime validation for attributes specified in attrs dataclasses based on the type field provided.
bfa: Builders for attrs
cattrs: for structuring and unstructuring data
datargs: A paper-thin wrapper around argparse that creates type-safe parsers from dataclass and attrs classes.
desert: DRY deserialization for dataclasses and attrs classes.
marshmallow-attrs: Marshmallow serialization for attrs classes.
msgspec: fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOML – and first-class support for attrs
prettyprinter: an extensible alternative to pprint comes with attrs support.
related: for creating nested object models that can be serialized to and de-serialized from nested python dictionaries
Rich supports pretty-printing of attrs classes.
serde: a performant serialization / deserialization extension to and from plain dicts.
spock: lightweight typed and stateful parameter configuration library (mainly for ML) that wraps attrs
typecats: Make attrs classes act more like structural (rather than nominal) typing; built on top of cattrs.
valid8: provides an alternate way to add validation to attributes, supporting various coding styles to define your validation functions and validation exception types/messages
yasoo: Serializes and deserializes attrs and dataclass objects without relying on type hints.