How to use the memacs.lib.contactparser.parse_org_contact_file function in memacs

def _parser_parse_args(self):
        """
        overwritten method of class Memacs

        all additional arguments are parsed in here
        """
        Memacs._parser_parse_args(self)
        if not (os.path.exists(self._args.smsxmlfile) or \
                     os.access(self._args.smsxmlfile, os.R_OK)):
            self._parser.error("input file not found or not readable")

        if self._args.orgcontactsfile:
            if not (os.path.exists(self._args.orgcontactsfile) or \
                    os.access(self._args.orgcontactsfile, os.R_OK)):
                self._parser.error("Org-contacts file not found or not readable")
            self._numberdict = parse_org_contact_file(self._args.orgcontactsfile)

def _parser_parse_args(self):
        """
        overwritten method of class Memacs

        all additional arguments are parsed in here
        """
        Memacs._parser_parse_args(self)
        if self._args.orgcontactsfile:
            if not (os.path.exists(self._args.orgcontactsfile) or \
                    os.access(self._args.orgcontactsfile, os.R_OK)):
                self._parser.error("Org-contacts file not found or not readable")
            self._numberdict = parse_org_contact_file(self._args.orgcontactsfile)
        else:
            self._numberdict = {}