def _logpdf(self, x, K):
        invK = 1.0 / K
        exparg = 0.5 * invK**2 - invK * x
        return exparg + log(0.5 * invK * erfc(-(x - invK) / sqrt(2)))
dataset/ETHPy150Open scipy/scipy/scipy/stats/_continuous_distns.py/exponnorm_gen._logpdf/original