How to include python ubus module in openwrt?

I am trying to include the python ubus module from pypi.org through the Makefile. The files are getting installed but still it shows the module not found error.

Traceback (most recent call last):
File "/usr/bin/optage_timer.py", line 5, in
import ubus
ModuleNotFoundError: No module named 'ubus'

Is there any way to include python ubus module ?