human
I wrote the below code

    def _check_args(theta, k):
        condth = (theta >= 0)
        cond1 = (((theta + (3 * k)) > 0) and ((theta + k) <= 1) and ((theta + (2 * k)) <= 1))
        return (condth and cond1)
    if (not np.all(_check_args(theta, k))):
        raise ValueError('invalid    args')
    transf = (((1 - ((theta + k) * t)) + ((theta * t) * t)) + (k * (t ** 3)))
    return transf

What's a good function header?
 ... Here's a good function header?
assistant
#Here's a good function header.

def transform_tawn2(t, theta, k):