Python Decorators
Python Decorators
Python decorator is a special type of function that allows you to modify or enhance another function without changing its actual code. Decorators are often used for logging, access control, etc.
Why Use Decorators?
- To add extra behavior to functions or methods.
- To follow the DRY (Don’t Repeat Yourself) principle.
- To make the code cleaner and more readable.
Basic Syntax
def decorator_function(original_function):
def wrapper_function():
print("Wrapper executed before", original_function.__name__)
return original_function()
return wrapper_function
@decorator_function
def say_hello():
print("Hello!")
say_hello()
How It Works
When you use @decorator_function above say_hello(), it is the same as:
say_hello = decorator_function(say_hello)Decorators with Arguments
def decorator_with_args(func):
def wrapper(*args, **kwargs):
print("Arguments passed:", args, kwargs)
return func(*args, **kwargs)
return wrapper
@decorator_with_args
def greet(name):
print("Hello", name)
greet("Alice")
Built-in Decorators
@staticmethod– Defines a static method in a class.@classmethod– Defines a class method.@property– Used to make methods behave like attributes.
Decorators are a powerful feature in Python that help add functionality to functions in a clean and elegant way.
Python Tutorials
Python Tutorial on this website can be found at:
