Running Python Demo 'module' object has no attribute 'PixelBasedAdaptiveSegmenter'

I am having difficulties trying to get the Python Demo working. I had to change "from _-------- import ---------" lines in "build" to simply "from --------- import ---------" inorder to fix import errors. Unfortunately, I have gotten stuck at:

"from bgs.pbas import *" in the __init__.py file in the /bgs/pbas folder. When I try to run the demo file, I get
```
Traceback (most recent call last):
File "./demo.py", line 17, in
segmenter = pbas.PixelBasedAdaptiveSegmenter()
AttributeError: 'module' object has no attribute 'PixelBasedAdaptiveSegmenter'
```

I am not sure how to debug this issue.