How do decorators differ between Python 2 and Python 3?

How do decorators differ between Python 2 and Python 3?

In Python 3, decorators are more flexible and can use syntax like @decorator_name. Python 2 has similar functionality but lacks some enhancements.

Can you give me an example of a decorator in both versions?

Sure! In Python 2, you might define a decorator like this:

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

In Python 3, the syntax remains the same, but you can also use keyword-only arguments and other features.

Are there any performance differences when using decorators in Python 2 vs Python 3?

Generally, the performance differences are minimal, but Python 3 has optimizations that can make decorators slightly faster in some cases.

What are some common use cases for decorators?

Common use cases include logging, enforcing access control, memoization, and modifying the behavior of functions or methods.