Python tkinter: Add button to menu bar
Question: I am trying to add a button to the far right of the menubar in my program. But
it isn't working for me. When I connect it to 'root' it appears below it; when
I attach it to 'menubar' or 'filemenu' it doesn't show up at all. Here is my
code:

    
    
    from tkinter import *
    
    root = Tk()
    
    menubar = Menu(root)
    
    # set up button
    btn1 = Button(root, text='x')
    btn1.pack(side='right', anchor='n', padx=0, pady=0)
    
    filemenu = Menu(menubar,tearoff=0)
    
    # add commands to menu
    filemenu.add_command(label="New File")
    filemenu.add_command(label="Open")
    filemenu.add_command(label="Save")
    menubar.add_cascade(label="File", menu=filemenu)
    root.config(menu=menubar)    
    
    root.mainloop()
    


Answer: You cannot do what you want. The menubar is a special, native control that
doesn't support the ability to add random buttons to it.

You can use `add_command` on the menubar itself rather than a submenu, but I
think your users would be surprised at this. People generally expect to get a
menu when they click on something on the menubar.

