def METHOD_NAME(self):
    # most basic?! fan-out
    def func(n):
        a = np.zeros(n)
        b = np.zeros(n)
        x = (a, b)
        acc = 0.
        for i in x:
            acc += i[0]
        return acc
    self.check(func, (types.intp), basicblock=True, fanout=True)