__New__ Development Tutorials, Guides & Insights

class DebugBase:
    def __init_subclass__(cls, **kwargs):
        print(f"Creating subclass {cls.__name__}")
        super().__init_subclass__(**kwargs)

class Subclass(DebugBase):
    pass
# Output: Creating subclass Subclass

• Use metaclasses sparingly; they add complexity.
• Prefer composition and decorators for simpler use cases.
• Document your metaclasses thoroughly for maintainability.