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From: Peter Otten <__peter__@web.de>
Subject: Re: Decorator
Date: Thu, 20 Mar 2014 10:59:35 +0100
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Xref: csiph.com comp.lang.python:68573

muru kessan wrote:

>     Is there a difference between accessing decorators via '@' symbol and
> hard coding that ? esp when the function passed to the decorator is a
> recursive one?

The difference is not the decorator but the recursive function call. 
Consider

Case 1:

@deco
def f():
   ...
   f() # calls the decorated function
   ...
f()

Case 2:

def f()
    ...
    f() # calls the undecorated function
    ...
g = deco(f)
g()


The function call f() will invoke whatever the global name f is bound to a 
the time of invocation. So

Case 3:

def f()
    ...
    f() # calls the decorated function
    ...
f = deco(f)
f()

In your code change 

fib1 = isOddMy(fib)

to

fib = isOddMy(fib)

and the without@ version will produce the same output as the with@ version.