title: how to assign hotkeys?
body: <p>please help to assign hotkeys to the top entry menu "OPEN". </p>
  
  <pre><code>import tkinter
  
  def fileOpen():
      print('qwerty')
  
  def makeMenu(parent):
      top = tkinter.Menu(parent) 
      parent.config(menu = top)                           
  
      file = tkinter.Menu(top, tearoff = False)
      file.add_command(label = 'Open...', command = fileOpen, accelerator = 'ctrl+o')
      top.add_cascade(label = 'File', menu = file)
  
      #top.bind_class(top, '&lt;Control-Key-o&gt;', fileOpen)
  
  root = tkinter.Tk()
  
  makeMenu(root)
  
  root.mainloop()
  </code></pre>
  
  <p>I need to by pressing "CTRL + O" runs the function "fileOpen" </p>