4.10. Define a decorator called test that prints 'start' when a function is called and
'end' when it finishes.
>>> def test(func):
...
 def new_func(*args, kwargs):
...
 print('start')
...
 result = func(*args, kwargs)
...
 print('end')
...
 return result
...
 return new_func
...
>>>
>>> @test
... def greeting():
...
 print("Greetings, Earthling")
...
>>> greeting()
start
Greetings, Earthling
end

def test(func):
    def new_func(*args, kwargs):
        print('start')
        result = func(*args, kwargs)
        print('end')
        return result
    return new_func
  File "<ipython-input-2-bf22d88eb476>", line 4
    result = func(*args, kwargs)
                        ^
SyntaxError: only named arguments may follow *expression