Newbie errors :-( Need help

[- C Saha -]

Hi All 
   
  I am getting the result but along with this error, any idea what could be the reason?
   
   
  fibo.fib(1000)
 1 1 2 3 5 8 13 21 34 55 89 144 233 377 610 987Traceback (most recent call last):
  File "<interactive input>", line 1, in ?
  File "fibo.py", line 8, in fib
    return result
NameError: global name 'result' is not defined
   
   
  Code is given below 
  ------------------------------------
   
  # Fibonacci numbers module
def fib(n): # write Fibonacci series up to n
    a, b = 0, 1
    while b < n:
        print b,
        a, b = b, a+b
    return result
   
   


Thanks a lot to all in advance 

====================
Thanks & Regards 
CSaha
		
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