ngplant wrapper

Sorry for digging that thread out. Im really a beginner in panda3d, linux and python. When I tried to run the ngp2obj.py of Hypnos, which should as far as i understand display the palm.ngp in the panda engine with a rotating camera. However, when i try to run it i get the following error:

Traceback (most recent call last):
File “ngp2obj.py”, line 6, in
import _ngp
ImportError: No module named _ngp
robin@PMI37Ubuntu:~/Dokumente/Freizeit/3d und games/toolz/panda-ngplant/src$ python ngp2obj.py
Traceback (most recent call last):
File “ngp2obj.py”, line 6, in
import _ngp
ImportError: No module named _ngp

I have located _ngp.so file, which I think is required in the /proc/10313/cwd/pywrapper folder. How can I tell python to find this file?

I know that that is more a pyton than a panda problem, but I haven’t found a solution with searching on the internet and would be very glad if someone could help me.