Function decorators

Let's analyze some examples before we get down to the next dose of theory.

So, let's create a function – simple_hello() is one of the simplest functions we could think of. We'll decorate it in a moment.

def simple_hello():
    print("Hello from simple function!")

Now let's create another function, simple_decorator(), which is more interesting as it accepts an object as a parameter, displays a __name__ attribute value of the parameter, and returns an accepted object.

def simple_decorator(function):
    print('We are about to call "{}"'.format(function.__name__))
    return function

The last lines are responsible for both method invocations:

decorated = simple_decorator(simple_hello)
decorated()

The whole code should look like the code presented in the right pane.

When you run the code, the result should be:

We are about to call "simple_hello"
Hello from simple function!

output

Function decorators

Code