def PredictivePmf(self, xs, name='<STR_LIT>'):
alpha0 = self.params.sum()<EOL>ps = self.params / alpha0<EOL>return MakePmfFromItems(zip(xs, ps), name=name)<EOL>
Makes a predictive distribution.

        xs: values to go into the Pmf

        Returns: Pmf that maps from x to the mean prevalence of x