Traceback (most recent call last):
  File "bin/curvecalc", line 224, in refreshCurveView
    curvesVBox, zoomControlBox, self.curveset)
  File "bin/../light9/curvecalc/curveview.py", line 847, in __init__
    self.zoomControl = light9.curvecalc.zoomcontrol.ZoomControl()
  File "bin/../light9/curvecalc/zoomcontrol.py", line 73, in __init__
    self.leftbrack = GooCanvas.Polyline(parent=self.root,
  File "/usr/lib/python2.7/dist-packages/gi/module.py", line 249, in __getattr__
    return getattr(self._introspection_module, name)
  File "/usr/lib/python2.7/dist-packages/gi/module.py", line 107, in __getattr__
    self.__name__, name))
AttributeError: 'gi.repository.GooCanvas' object has no attribute 'Polyline'