def open_file(self, title="<STR_LIT>", **kwargs):
<EOL>return self._run_zenity(title, ["<STR_LIT>"], kwargs)<EOL>
Show an Open File dialog

Usage: C{dialog.open_file(title="Open File", **kwargs)}

@param title: window title for the dialog
@return: a tuple containing the exit code and file path
@rtype: C{DialogData(int, str)}