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Metaclasses are often used in Object-Relational Mappers (ORMs) to define database models dynamically.

class ModelMeta(type):
    def __new__(cls, name, bases, dct):
        dct["table_name"] = name.lower()
        return super().__new__(cls, name, bases, dct)

class BaseModel(metaclass=ModelMeta):
    pass

class User(BaseModel):
    pass

print(User.table_name)  # Output: user