ImportError: No module named 'util'

[20032303092]

Traceback (most recent call last):
File "psednc.py", line 1, in
from repDNA.psenac import PseDNC
File "/home/pbc/anaconda3/envs/py3.4/lib/python3.5/site-packages/repDNA/psenac.py", line 3, in
from util import get_data
ImportError: No module named 'util'

env：
I tried python 3.4 and 3.5,but it does not work.