Cannot import name QtCore

[dhighet]

When executing qhangups I get the following

Traceback (most recent call last):
  File "/usr/local/bin/qhangups", line 7, in <module>
    from qhangups.__main__ import main
  File "/usr/local/lib/python3.3/dist-packages/qhangups/__main__.py", line 5, in <module>
    from PyQt5 import QtCore, QtGui, QtWidgets
ImportError: cannot import name QtCore