[pyusb-users] Ubunto - No module named 'usb'

[Saeed M. <s.m...@gm...>]

Hi,

I am working on a Jetson Nano with Ubuntu 18.04. The common 'pip install
pyusb' did not work and I got this error:
ModuleNotFoundError: No module named 'usb'

Upon running:
import usb.core

Then I tried:
sudo python3 -mpip install pyusb

This worked but when I try 'import usb.core' in a virtual environment, I am
getting the same error.
Any idea what is happening here?

Thanks,
Saeed