def software_fibonacci ( n ) : a , b = 0 , 1 for i in range ( n ) : a , b = b , a + b return a
how to code for the fibbonacci sequence in python
a normal old python function to return the Nth fibonacci number .
def software_fibonacci(n):
    """ a normal old python function to return the Nth fibonacci number. """
    a, b = 0, 1
    for i in range(n):
        a, b = b, a + b
    return a