i got it from devel. it says python protobuf installed, but i still get that error? any ideas?

this is exactly what it says...


~ $ mypaint
Traceback (most recent call last):
File "/usr/bin/mypaint", line 123, in <module>
from gui import main
File "/usr/share/mypaint/gui/main.py", line 15, in <module>
from gui import application
File "/usr/share/mypaint/gui/application.py", line 14, in <module>
import filehandling, keyboard, brushmanager
File "/usr/share/mypaint/gui/filehandling.py", line 18, in <module>
from lib import document, helpers
File "/usr/share/mypaint/lib/document.py", line 17, in <module>
import command, stroke, layer
File "/usr/share/mypaint/lib/command.py", line 9, in <module>
import layer
File "/usr/share/mypaint/lib/layer.py", line 11, in <module>
import tiledsurface, strokemap, strokemap_pb2
File "/usr/share/mypaint/lib/strokemap.py", line 13, in <module>
import tiledsurface, idletask, strokemap_pb2
File "/usr/share/mypaint/lib/strokemap_pb2.py", line 3, in <module>
from google.protobuf import descriptor
ImportError: No module named google.protobuf