Advanced Python: Decorators

Decorators are a way to modify functions and classes at runtime.

Higher Order Functions

Higher-order functions accepts another function or returns another function.

Implementing decorators

Here is an example of writing a decorator.

def my_decorator(func):
    def wrap_func():
        print('*****')
        func()
        print('*****')
    return wrap_func

@my_decorator
def hello():
    print('Hello')

hello()
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Handling decorators with args.

def my_decorator(func):
    def wrap_func(*args, **kwargs):
        print('*****')
        func(*args, **kwargs)
        print('*****')
    return wrap_func

@my_decorator
def hello():
    print('Hello')

hello()
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Why do we need decorators?

Examples: