Next
1. Create Class & Object2. Instance vs Class Variables3. Constructors in Python Classes4. Single Inheritance5. Multiple Inheritance6. Multilevel Inheritance7. Polymorphism with Methods8. Method Overloading Simulation9. Encapsulation with Getters/Setters10. Abstraction with ABC11. Operator Overloading12. Custom Iterator13. Class Methods14. Static Methods15. Composition Example16. Aggregation Example17. Private Variables18. Magic Methods Overview19. Object Cloning20. Custom Exceptions21. Class Decorator22. Prototype Pattern23. Singleton Pattern24. MRO (Method Resolution Order) Demo25. Polymorphism (Duck Typing)

Class Decorator in Python

Use a class as a decorator to wrap functions with additional behavior.

IntermediateObject-Oriented ProgramsExample 21 of 25
class-decorator.py
Run in browser
1# Program to demonstrate a simple class decorator
2

3class CallLogger:
4    def __init__(self, func):
5        self.func = func
6

7    def __call__(self, *args, **kwargs):
8        print(f"Calling {self.func.__name__}")
9        return self.func(*args, **kwargs)
10

11@CallLogger
12def greet(name):
13    print("Hello,", name)
14

15greet("Alice")

Output

Calling greet
Hello, Alice

What's going on

Implementing __call__ in a class allows its instances to behave like functions and be used as decorators.

PreviousCustom ExceptionsNextPrototype Pattern