How to use the openpyn.api.list_all_countries function in openpyn

kill_openpyn_process()

    elif update:
        update_config_files()

    # a hack to list all countries and their codes when no arg supplied with "-l"
    elif list_servers != 'nope':      # means "-l" supplied
        if list_servers is None:      # no arg given with "-l"
            if p2p or dedicated or double_vpn or tor_over_vpn or anti_ddos or netflix:
                # show the special servers in all countries
                display_servers(
                    list_servers="all", port=port, area=area, p2p=p2p, dedicated=dedicated,
                    double_vpn=double_vpn, tor_over_vpn=tor_over_vpn, anti_ddos=anti_ddos,
                    netflix=netflix, location=location)
            else:
                api.list_all_countries()
        # if a country code is supplied give details about that country only.
        else:
            # if full name of the country supplied get country_code
            if len(list_servers) > 2:
                list_servers = api.get_country_code(full_name=list_servers)
            display_servers(
                list_servers=list_servers, port=port, area=area, p2p=p2p, dedicated=dedicated,
                double_vpn=double_vpn, tor_over_vpn=tor_over_vpn, anti_ddos=anti_ddos,
                netflix=netflix, location=location)

    # only clear/touch FW Rules if "-f" used
    elif force_fw_rules:
        firewall.clear_fw_rules()

    # check if OpenVPN config files exist if not download them.
    check_config_files()