run sloth error

[vaibhavpatil-symblai]

➜ sloth git:(master) sudo python3 sloth/bin/sloth examples/example1_labels.json
Traceback (most recent call last):
File "/Users/vaishnavi/sloth/sloth/bin/sloth", line 5, in
from PyQt4.QtGui import QApplication
ModuleNotFoundError: No module named 'PyQt4'

[laurelrr]

see #139