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I ran cursor.py, downloaded from the matplotlib/examples/widgets web page.
I'm on mac osx 10.9.4, anaconda latest as of today, matplotlib 1.3.1
the output is this:
79-118-141-238:wigetsifmichael$pythoncursor.pyTraceback (mostrecentcalllast):File"/Users/ifmichael/anaconda/lib/python2.7/site-packages/matplotlib/artist.py",line55,indraw_wrapperdraw(artist,renderer,*args,**kwargs)File"/Users/ifmichael/anaconda/lib/python2.7/site-packages/matplotlib/figure.py",line1040,indrawself.canvas.draw_event(renderer)File"/Users/ifmichael/anaconda/lib/python2.7/site-packages/matplotlib/backend_bases.py",line1693,indraw_eventself.callbacks.process(s,event)File"/Users/ifmichael/anaconda/lib/python2.7/site-packages/matplotlib/cbook.py",line527,inprocessproxy(*args,**kwargs)File"/Users/ifmichael/anaconda/lib/python2.7/site-packages/matplotlib/cbook.py",line405,in__call__returnmtd(*args,**kwargs)File"/Users/ifmichael/anaconda/lib/python2.7/site-packages/matplotlib/widgets.py",line865,inclearself.background=self.canvas.copy_from_bbox(self.ax.bbox)AttributeError:'FigureCanvasMac'objecthasnoattribute'copy_from_bbox'Traceback (mostrecentcalllast):File"/Users/ifmichael/anaconda/lib/python2.7/site-packages/matplotlib/backend_bases.py",line1834,inmotion_notify_eventself.callbacks.process(s,event)File"/Users/ifmichael/anaconda/lib/python2.7/site-packages/matplotlib/cbook.py",line527,inprocessproxy(*args,**kwargs)File"/Users/ifmichael/anaconda/lib/python2.7/site-packages/matplotlib/cbook.py",line405,in__call__returnmtd(*args,**kwargs)File"/Users/ifmichael/anaconda/lib/python2.7/site-packages/matplotlib/widgets.py",line892,inonmoveself._update()File"/Users/ifmichael/anaconda/lib/python2.7/site-packages/matplotlib/widgets.py",line899,in_updateself.ax.draw_artist(self.linev)File"/Users/ifmichael/anaconda/lib/python2.7/site-packages/matplotlib/axes.py",line2098,indraw_artista.draw(self._cachedRenderer)File"/Users/ifmichael/anaconda/lib/python2.7/site-packages/matplotlib/artist.py",line55,indraw_wrapperdraw(artist,renderer,*args,**kwargs)File"/Users/ifmichael/anaconda/lib/python2.7/site-packages/matplotlib/lines.py",line526,indrawgc=renderer.new_gc()File"/Users/ifmichael/anaconda/lib/python2.7/site-packages/matplotlib/backends/backend_macosx.py",line97,innew_gcself.gc.save()RuntimeError:CGContextRefisNULL
Maybe this issue was resolved in 1.4.0, but I cannot install it (see#3517)