sampler.py 文件源码

def sample_posterior(self, session=None, return_stats=False, **kwargs):
        """
        Returns a new sample from the posterior distribution of the parameters.
        :param return_stats: Whether to return sampling process statistics
        :return: the generated sample
        """

        # make a number of tries to draw a sample
        for i in range(self.draw_retries_num):
            sample, stats = self._sample_posterior(session=session, return_stats=return_stats, **kwargs)
            if sample is not None:
                break

        if sample is not None:
            self.sample_number += 1
        else:
            logging.warning('Impossible to draw a sample with the specified parameters.')

        if return_stats:
            return sample, stats

        return sample