Decorators in Python are a powerful tool that allows you to modify or enhance functions without changing their source code. They are commonly used for tasks like logging, access control, or caching.

Key Concepts

  • What is a decorator?
    A decorator is a function that wraps another function to add functionality. 🛠️

    decorator_concept

  • How do they work?
    Decorators use the @ symbol and take the target function as an argument. 

    @decorator  
def function():  
    pass
    python_function

  • Common use cases

    • Adding logging 📝
    • Enforcing access control 🔒
    • Caching results 🧾
    • Timing function execution ⏱️

Example

def my_decorator(func):  
    def wrapper():  
        print("Before function call")  
        func()  
        print("After function call")  
    return wrapper  

@my_decorator  
def say_hello():  
    print("Hello!")  

say_hello()
code_example

Further Reading

For more advanced topics, check out our tutorial on Python Functions. 📚