cannot import name 'vehicleinfo' from 'pysim'

~/ardupilot/ArduCopter$ /usr/bin/python3 sim_vehicle.py -w
Traceback (most recent call last):
File “sim_vehicle.py”, line 25, in
from pysim import vehicleinfo
ImportError: cannot import name ‘vehicleinfo’ from ‘pysim’ (/home/ramzib/.local/lib/python3.8/site-packages/pysim/init.py)
any solution please?

Update to ArduCopter 4.3.5-rc1 and retest.