human
Solve the following python programming problem given the following code:
def setupUi(self) : 
    self.objectTree = QtGui.QTreeWidget () 
    self.propertiesPanel = PythonQt.dd.ddPropertiesPanel () 
    sidePanel = QtGui.QSplitter (QtCore.Qt.Vertical) 
    sidePanel.addWidget (self.objectTree) 
    sidePanel.addWidget (w.propertiesPanel) 
    sidePanel.setSizes ([6, 4]) 
    om.init (self.objectTree, self.propertiesPanel) 
    self.view = PythonQt.dd.ddQVTKWidgetView () 
    lcmgl.init (self.view) 
    self.view.backgroundRenderer ().SetBackground (1, 1, 1) 
    self.view.backgroundRenderer ().SetBackground2 (1, 1, 1) 
    def setTextProperty(caption) : 
        prop = caption.GetCaptionTextProperty () 
        prop.ShadowOff () 
        prop.BoldOn () 
        prop.ItalicOff () 
        prop.SetColor (0, 0, 0) 
axesActor = self.view.orientationMarkerWidget ().GetOrientationMarker () 
    setTextProperty (axesActor.GetXAxisCaptionActor2D ()) 
    setTextProperty (axesActor.GetYAxisCaptionActor2D ()) 
    setTextProperty (axesActor.GetZAxisCaptionActor2D ()) 
    w = QtGui.QWidget () 
    l = QtGui.QHBoxLayout (w) 
    self.slider = QtGui.QSlider (QtCore.Qt.Horizontal) 
    self.clearButton = QtGui.QPushButton ('clear') 
    self.zeroButton = QtGui.QPushButton ('zero') 
    l.addWidget (self.clearButton) 
    l.addWidget (self.zeroButton) 
    l.addWidget (self.slider) 
    self.slider.connect (self.slider, 'valueChanged(int)', self.onSlider) 
    self.slider.connect (self.zeroButton, 'clicked()', self.onZeroButtonClicked) 
    self.slider.connect (self.clearButton, 'clicked()', self.onClearButtonClicked) 
    ww = QtGui.QWidget () 
    ll = QtGui.QVBoxLayout (ww) 
    ll.addWidget (self.view) 
    ll.setMargin (0) 
    splitter = QtGui.QSplitter () 
    splitter.addWidget (sidePanel) 
    splitter.addWidget (ww) 
    splitter.setSizes ([0, 1]) 
    splitter.show () 
    splitter.resize (800, 600) 
    self.widget = splitter 
    self.widget.setWindowTitle ('Drake Viewer') 

    
    

    Fix the buggy line: sidePanel.addWidget (w.propertiesPanel)
assistant
#Here is Python code to fix the buggy line: sidePanel.

sidePanel.addWidget (self.propertiesPanel)