'Second derivative of the C-Log-Log ink function
Parameters
p : array-like
Mean parameters
Returns
g\'\'(p) : array
The second derivative of the CLogLog link function'

def deriv2(self, p):

    p = self._clean(p)
    fl = np.log((1 - p))
    d2 = ((-1) / (((1 - p) ** 2) * fl))
    d2 *= (1 + (1 / fl))
    return d2
