menu.add_command options

[Paul Sage]

Tkinter:
In the line:

file_menu.add_command(label='Load Form', underline=0,
command=self.open_file)

Does anyone have a list of options that go with the menu.add_command?  I
need to pass the frame to the method open_file, but I don't know how to
pass that as an argument.  The book I have Python and Tkinter
programming just says "options..."  While I am all for a good mystery,
it is somewhat disheartening to find in a $50+ book.