What are some advanced topics in the Python Standard Library?

What are some advanced topics in the Python Standard Library?

The Python Standard Library has many advanced topics, such as decorators, context managers, and metaclasses. Would you like to explore any of these?

Can you explain decorators in detail?

Sure! Decorators are a way to modify or enhance functions or methods without changing their code. They are often used for logging, access control, and caching.

How do I create a custom decorator?

To create a custom decorator, define a function that takes another function as an argument, and then define a nested function that adds the desired behavior. Finally, return the nested function.

Can you give me an example of a custom decorator?

Absolutely! Here's a simple example:

def my_decorator(func):
    def wrapper():
        print('Something is happening before the function is called.')
        func()
        print('Something is happening after the function is called.')
    return wrapper

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

say_hello()