No module named 'pygsp.graphs.nngraphs.spherehealpix'

[zhaoying9105]

Traceback (most recent call last):
File "/projs/AE/zhaoying/projects/sdu/deepsphere-pytorch/scripts/run_ar_tc.py", line 21, in
from deepsphere.models.spherical_unet.unet_model import SphericalUNet
File "/projs/AE/zhaoying/projects/sdu/deepsphere-pytorch/deepsphere/models/spherical_unet/unet_model.py", line 14, in
from deepsphere.utils.laplacian_funcs import get_equiangular_laplacians, get_healpix_laplacians, get_icosahedron_laplacians
File "/projs/AE/zhaoying/projects/sdu/deepsphere-pytorch/deepsphere/utils/laplacian_funcs.py", line 6, in
from pygsp.graphs.nngraphs.spherehealpix import SphereHealpix
ModuleNotFoundError: No module named 'pygsp.graphs.nngraphs.spherehealpix'