The Wizardry of Metaprogramming
summary
Explains how Python’s type is the default metaclass so classes are constructed dynamically, shows that metaclasses can override __new__/__init__ (Django’s ModelBase sets field attributes via __new__), and demonstrates descriptors implementing __get__/__set__ descriptors to validate (SmallInt) or lazily load (deferred ORM fields) values. Uses Django and six as concrete examples, shows the mechanics work, and cautions that metaprogramming is powerful but rarely needed outside frameworks like ORMs.
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