def mme_nodes(mme_base_url, token):
nodes = []<EOL>if not mme_base_url or not token:<EOL><INDENT>return nodes<EOL><DEDENT>url = '<STR_LIT>'.join([mme_base_url, '<STR_LIT>'])<EOL>nodes = matchmaker_request(url=url, token=token, method='<STR_LIT:GET>')<EOL>LOG.info('<STR_LIT>'.format(nodes))<EOL>return nodes<EOL>
Return the available MatchMaker nodes

    Args:
        mme_base_url(str): base URL of MME service
        token(str): MME server authorization token

    Returns:
        nodes(list): a list of node disctionaries