uff import error (Ubuntu, TensorRT 5.1.5)

I have an Ubuntu 16.04 system, GTX 1060, CUDA 10.0, TensorRT.
I am following the basic installation instructions.

uff converter is installed (appears to be correct):
sudo apt-get install uff-converter-tf

Reading package lists… Done
Building dependency tree
Reading state information… Done
uff-converter-tf is already the newest version (5.1.5-1+cuda10.0).

when I attempt to convert a frozen graph (python3.5 using virtualenv):

/usr/lib/python3.5/dist-packages/uff/bin$ python convert_to_uff.py tflite_graph.pb
Traceback (most recent call last):
File “convert_to_uff.py”, line 15, in
import uff
ImportError: No module named ‘uff’

What am I missing?

I don’t see any uff module on my computer:
find /usr -name uff*.*

  • fixed -

the problem was my python environment.
the uff package was in /usr/lib/python3.5/dist-packages/ (not in my virtualenv)
I added this to the PYTHONPATH and that resolved the issue