Advanced Features error

[Gagouking]

(gello_software) xbt@xbt:~/gello_software$ python gello/data_utils/demo_to_gdict.py --source-dir=/home/xbt/bc_data/gello/0909_110215/
Traceback (most recent call last):
File "/home/xbt/gello_software/gello/data_utils/demo_to_gdict.py", line 18, in
from gdict.data import DictArray, GDict
ModuleNotFoundError: No module named 'gdict.data'