No module named metacity

[Eignar17]

Traceback (most recent call last):
File "gstyle.py", line 3, in
from gui.main import MainWindow
File "/usr/lib/python2.7/dist-packages/gstyle/gui/main.py", line 13, in
from functions import *
File "/usr/lib/python2.7/dist-packages/gstyle/functions.py", line 3, in
import metacity
ImportError: No module named metacity
update project @smolleyes to ubuntu mate 16.04