'ModulaNotFoundError' appears: No module named 'scvi. _compat'

[llzl84]

When I import the scgen package, an error message named 'ModulaNotFoundError' appears: No module named 'scvi. _compat'

  1 """ScGen - Predicting single cell perturbations"""

----> [3]from ._scgenvae import SCGENVAE
4 from ._scgen import SCGEN
6 import logging

 2 import torch
 3 from scvi import REGISTRY_KEYS

----> [4] from scvi._compat import Literal
5 from scvi.module.base import BaseModuleClass, LossRecorder, auto_move_data
6 from scvi.nn import Encoder