kolo run demo. run with `kolo run python fib.py`

fib.py

def fib(n):
    if n:
        return n == 1 and n or fib(n - 1) + fib(n - 2)
    return 0


def A(m, n, s="% s"):
    if m == 0:
        return n + 1
    if n == 0:
        return A(m - 1, 1, s)
    n2 = A(m, n - 1, s % ("A(% d, %% s)" % (m - 1)))
    return A(m - 1, n2, s)


if __name__ == "__main__":
    # A(3, 2)
    fib(10)