OK, I got this working by installing the python-ply-lex-3.5 package.

I run on Ubuntu 16.04 using the PPA. Ever since the 0.18 update I have not been able to open openscad files.
When I try to open one, I get an error "no module named ply.lex".
Any ideas?

I've been using 0.16 on Ubuntu 14.04 for a while and decided to try out the latest daily build.
Installed the daily PPA and upgraded. Unfortunately, freecad-daily fails to start with the error:

No module named freecad

Is there some config step I missed?

Thanks!