Popup Menu in Tkinter

#creating popup menu in tkinter
import tkinter
 
class A:
    #creates parent window
    def __init__(self):
             
        self.root = tkinter.Tk()
        self.root.geometry('500x500')
 
        self.frame1 = tkinter.Label(self.root,
                                    width = 400,
                                    height = 400,
                                    bg = '#AAAAAA')
        self.frame1.pack()
 
    #create menu
    def popup(self):
        self.popup_menu = tkinter.Menu(self.root,
                                       tearoff = 0)
        
        self.popup_menu.add_command(label = "say hi",
                                    command = lambda:self.hey("hi"))
        
        self.popup_menu.add_command(label = "say hello",
                                    command = lambda:self.hey("hello"))
        self.popup_menu.add_separator()
        self.popup_menu.add_command(label = "say bye",
                                    command = lambda:self.hey("bye"))
 
    #display menu on right click
    def do_popup(self,event):
        try:
            self.popup_menu.tk_popup(event.x_root,
                                     event.y_root)
        finally:
            self.popup_menu.grab_release()
 
    def hey(self,s):
        self.frame1.configure(text = s)
        
    def run(self):
        self.popup()
        self.root.bind("<Button-3>",self.do_popup)
        tkinter.mainloop()

a = A()
a.run()