c:\python34\lib\site-packages\matplotlib\pyplot.py in plot(*args, **kwargs)
   3304 @_autogen_docstring(Axes.plot)
   3305 def plot(*args, **kwargs):
-> 3306     ax = gca()
   3307     # Deprecated: allow callers to override the hold state
   3308     # by passing hold=True|False

c:\python34\lib\site-packages\matplotlib\pyplot.py in gca(**kwargs)
    948     matplotlib.figure.Figure.gca : The figure's gca method.
    949     """
--> 950     return gcf().gca(**kwargs)
    951
    952 # More ways of creating axes:

c:\python34\lib\site-packages\matplotlib\pyplot.py in gcf()
    584         return figManager.canvas.figure
    585     else:
--> 586         return figure()
    587
    588

c:\python34\lib\site-packages\matplotlib\pyplot.py in figure(num, figsize, dpi, facecolor, edgecolor, frameon, FigureClass, **kwargs)
    533                                         frameon=frameon,
    534                                         FigureClass=FigureClass,
--> 535                                         **kwargs)
    536
    537         if figLabel:

c:\python34\lib\site-packages\matplotlib\backends\backend_qt4agg.py in new_figure_manager(num, *args, **kwargs)
     44     FigureClass = kwargs.pop('FigureClass', Figure)
     45     thisFig = FigureClass(*args, **kwargs)
---> 46     return new_figure_manager_given_figure(num, thisFig)
     47
     48

c:\python34\lib\site-packages\matplotlib\backends\backend_qt4agg.py in new_figure_manager_given_figure(num, figure)
     52     """
     53     canvas = FigureCanvasQTAgg(figure)
---> 54     return FigureManagerQT(canvas, num)
     55
     56

c:\python34\lib\site-packages\matplotlib\backends\backend_qt5.py in __init__(self, canvas, num)
    486         self.window.statusBar().addWidget(self.statusbar_label)
    487
--> 488         self.toolbar = self._get_toolbar(self.canvas, self.window)
    489         if self.toolbar is not None:
    490             self.window.addToolBar(self.toolbar)

c:\python34\lib\site-packages\matplotlib\backends\backend_qt5.py in _get_toolbar(self, canvas, parent)
    537         # attrs are set
    538         if matplotlib.rcParams['toolbar'] == 'toolbar2':
--> 539             toolbar = NavigationToolbar2QT(canvas, parent, False)
    540         else:
    541             toolbar = None

c:\python34\lib\site-packages\matplotlib\backends\backend_qt5.py in __init__(self, canvas, parent, coordinates)
    583
    584         QtWidgets.QToolBar.__init__(self, parent)
--> 585         NavigationToolbar2.__init__(self, canvas)
    586
    587     def _icon(self, name):

c:\python34\lib\site-packages\matplotlib\backend_bases.py in __init__(self, canvas)
   2758         self._active = None
   2759         self._lastCursor = None
-> 2760         self._init_toolbar()
   2761         self._idDrag = self.canvas.mpl_connect(
   2762             'motion_notify_event', self.mouse_move)

c:\python34\lib\site-packages\matplotlib\backends\backend_qt5.py in _init_toolbar(self)
    599                 self.addSeparator()
    600             else:
--> 601                 a = self.addAction(self._icon(image_file + '.png'),
    602                                    text, getattr(self, callback))
    603                 self._actions[callback] = a

c:\python34\lib\site-packages\matplotlib\backends\backend_qt5.py in _icon(self,name)
    589             name = name.replace('.png', '_large.png')
    590         pm = QtGui.QPixmap(os.path.join(self.basedir, name))
--> 591         pm.setDevicePixelRatio(self.canvas._dpi_ratio)
    592         return QtGui.QIcon(pm)
    593

AttributeError: 'PySide.QtGui.QPixmap' object has no attribute 'setDevicePixelRatio'