Unable to install vpi on Ubuntu-18.04

Hi everyone,

I’ve been trying hard to install vpi on a Ubuntu-18.04.
I’ve been following these instructions
https://docs.nvidia.com/vpi/installation.html
and reached a situation where vpi seems to have been installed without errors.

Repeating
sudo apt install libnvvpi2 vpi2-dev vpi2-samples
gives
libnvvpi2 is already the newest version (2.0.14).
vpi2-dev is already the newest version (2.0.14).
vpi2-samples is already the newest version (2.0.14).

/opt/nvidia/vpi2
directory has also been created.

However,
import vpi
gives
ModuleNotFoundError: No module named ‘vpi’

and running
sudo apt show cache nvidia-vpi
in terminal
gives
N: Unable to locate package cache
N: Unable to locate package nvidia-vpi
N: Unable to locate package cache
N: Unable to locate package nvidia-vpi
E: No packages found

How would you resolve this issue?
Thanks so much!
Ariel