python scoll canvas

    sbar = Scrollbar(self)
    sbar.config(command=canv.yview)                   # xlink sbar and canv
    canv.config(yscrollcommand=sbar.set)              # move one moves other
    sbar.pack(side=RIGHT, fill=Y)                     # pack first=clip last
    canv.pack(side=LEFT, expand=YES, fill=BOTH)       # canv clipped first

    self.fillContent(canv)
    canv.bind('<Double-1>', self.onDoubleClick)       # set event handler
    self.canvas = canv

def fillContent(self, canv):                           # override me below
    for i in range(10):
        canv.create_text(150, 50+(i*100), text='spam'+str(i), fill='beige')

def onDoubleClick(self, event):                       # override me below
    print(event.x, event.y)
    print(self.canvas.canvasx(event.x), self.canvas.canvasy(event.y))