Quick Answer
Metaclass controls class creation. type is the default metaclass. Custom metaclass: class Meta(type): def __new__(mcs, name, bases, attrs): modify attrs, return super().__new__(...). Use cases: auto-register subclasses (plugin systems), validate class definition, add methods automatically (ORMs), enforce coding standards. __init_subclass__ (Python 3.6+) is simpler for most use cases.
Answer
Metaclasses control class creation. Used for validation, enforcing interfaces, singletons, auto-registration. Defined by extending type and overriding __new__.
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
