This is another of the new interesting things that Python 3 has. Time ago, it was somehow tricky to work with decorated functions, because the decorator replaced the original object, and its behaviour became hard to reach.

So, for example, we all know that the following sentence:

@decorator
def function():
    pass

It’s actually syntax sugar for:

def function():
    pass

function = decorator(function)

So, if for some reason, we need to work both with the original and decorated functions, we required tricks such as different names, something like: