scipy的稀疏矩阵转换成torch的sparse tensor

def scipy_sparse_mat_to_torch_sparse_tensor(sparse_mx):
    """
    将scipy的sparse matrix转换成torch的sparse tensor.
    """
    sparse_mx = sparse_mx.tocoo().astype(np.float32)
    indices = torch.from_numpy(
        np.vstack((sparse_mx.row, sparse_mx.col)).astype(np.int64))
    values = torch.from_numpy(sparse_mx.data)
    shape = torch.Size(sparse_mx.shape)
    return torch.sparse.FloatTensor(indices, values, shape)