What are advanced Python decorators and how do I use them?

What are advanced Python decorators and how do I use them?

Advanced Python decorators are functions that modify the behavior of other functions or methods. They can be used for logging, enforcing access control, instrumentation, and more.

Can you give me an example of a decorator that logs function calls?

Sure! Here's a simple logging decorator:

import functools

def log_function_call(func):
    @functools.wraps(func)
    def wrapper(*args, **kwargs):
        print(f'Calling {func.__name__} with arguments {args} and {kwargs}')
        return func(*args, **kwargs)
    return wrapper

@log_function_call
def my_function(x, y):
    return x + y

How can I apply multiple decorators to a single function?

You can stack decorators by applying them one after the other. For example:

@decorator_one
@decorator_two
def my_function():
    pass

Are there any performance considerations when using decorators?

Yes, decorators can introduce overhead, especially if they perform complex operations. It's important to keep them efficient.