Как заставить скрипт запускать Pynotify

Я предпочитаю Ctrl-G:

http://vimdoc.sourceforge.net/htmldoc/editing.html

CTRL-G      or              *CTRL-G* *:f* *:fi* *:file*
:f[ile]         Prints the current file name (as typed, unless ":cd"
            was used), the cursor position (unless the 'ruler'
            option is set), and the file status (readonly,
            modified, read errors, new file).  See the 'shortmess'
            option about how to make this message shorter.
            {Vi does not include column number}