Quick Answer
Descriptors implement __get__, __set__, __delete__ to control attribute access on a class. Used when an attribute needs validation or computation on access. @property is a built-in descriptor. Custom descriptors: class Validator: def __set__(self, obj, value): validate(value); obj.__dict__[name] = value. Used by SQLAlchemy and Django ORM to define column types and relationships.
Answer
Descriptors define __get__, __set__, and __delete__ methods. Used for managing attribute access, validation, computed attributes, and reusable logic. They power @property functionality in Python.
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Verified Answer
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