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Declaring class attributes with decorators and type annotations to automatically generate dunder methods.
Distinct from Class Definitions with Constructors: Distinct from Class Definitions with Constructors: focuses on declarative attribute definition with automatic method generation, not manual constructor writing.
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attrs is a Python library that automatically generates initialization, representation, equality, hashing, and ordering methods from declarative class attribute definitions. At its core, it provides a class decorator metaprogramming framework that intercepts class creation to rewrite the class body, producing dunder methods without manual boilerplate. The library includes a comprehensive attribute validation toolkit with built-in validators for type checks, range constraints, regex matching, length limits, and logical composition of validation rules. The library distinguishes itself through it
Declares attributes via decorator and type annotations, then automatically generates initializer, repr, and equality methods.