code: def left_release(self, event):
          
          self.config(cursor="")
          if len(self.canvas.find_withtag("current")) != 0 and self.current is not None:
              self.canvas.itemconfigure(tk.CURRENT, fill=self.item_colors[self.current][1])
docs: Callback for the release of the left button.
  
          :param event: Tkinter event