Password = StringVar()
 Username = StringVar()
 def EnterPassword():
        UsernameAttempt = Username.get()#how to get value from entry box
        PasswordAttempt = Password.get()#how to get value from entry box

        if PasswordAttempt == '' and UsernameAttempt == '':
            self.delete()
            Landlord = LandlordMenu()
        else:
            PasswordError = messagebox.showerror('Password/Username         Entry','Incorrect Username or Password entered.n         Please try again.')
PasswordButton = Button(self.GenericGui,text = 'Landlord Section',height = 3, width = 15, command = EnterPassword, font = ('TkDefaultFont',14),relief=RAISED).place(x=60,y=175)