mppovm.py 文件源码

def pack_samples(self, samples, dtype=None):
        """Pack samples into one integer per sample

        Store one sample in a single integer instead of a list of
        integers with length `len(self.nsoutdims)`. Example:

        >>> p = pauli_mpp(nr_sites=2, local_dim=2)
        >>> p.outdims
        (6, 6)
        >>> p.pack_samples(np.array([[0, 1], [1, 0], [1, 2], [5, 5]]))
        array([ 1,  6,  8, 35])

        """
        assert samples.ndim == 2
        assert samples.shape[1] == len(self.nsoutdims)
        samples = np.ravel_multi_index(samples.T, self.nsoutdims)
        if dtype not in (True, False, None) and issubclass(dtype, np.integer):
            info = np.iinfo(dtype)
            assert samples.min() >= info.min
            assert samples.max() <= info.max
            samples = samples.astype(dtype)
        return samples