code: def H11(self):
          "Difference entropy."
          return -(self.p_xminusy * np.log(self.p_xminusy + self.eps)).sum(1f H11(self):
          "Difference entropy."
          return -(self.p_xminusy * np.log(self.p_xminusy + self.eps)).sum(1)
docs: Difference entropy.