code: def handle_keyrelease(self, event):
          
          if event.keysym == "BackSpace":
              self.delete(self.index(tk.INSERT), tk.END)
              self.position = self.index(tk.END)
          if event.keysym == "Left":
              if self.position < self.index(tk.END):  # delete the selection
                  self.delete(self.position, tk.END)
              else:
                  self.position -= 1  # delete one character
                  self.delete(self.position, tk.END)
          if event.keysym == "Right":
              self.position = self.index(tk.END)  # go to end (no selection)
          if event.keysym == "Return":
              self.handle_return(None)
              return
          if len(event.keysym) == 1:
              self.autocomplete()
docs: Event handler for the keyrelease event on this widget.
          
          :param event: Tkinter event