':group_code: int, can be "ture" of "fake" group_code
:return:dict'

def get_group_member_info_list(self, group_code):

    if (group_code == 0):
        logger.debug('get_group_member_info_list    \xe8\xbe\x93\xe5\x85\xa5\xe4\xb8\xba0\xef\xbc\x8c\xe8\xbf\x94\xe5\x9b\x9e    None')
        return
    try:
        url = ('http://s.web2.qq.com/api/get_group_info_ext2?gcode=%s&vfwebqq=%s&t=%s' % (group_code, self.vfwebqq, int((time.time() * 100))))
        response = self.client.get(url)
        logger.debug('get_group_member_info_list    info    response:    {}'.format(response))
        rsp_json = json.loads(response)
        retcode = rsp_json['retcode']
        if (retcode == 0):
            result = rsp_json['result']
        elif (retcode == 6):
            logger.debug('get_group_member_info_list    retcode    is    6,    trying    to    get    true    code.')
            result = self.get_group_member_info_list(self.get_true_group_code(group_code))
        else:
            logger.warning('group_code    error.')
            return
        self.group_member_info[str(group_code)] = result
        return result
    except Exception as ex:
        logger.warning(('get_group_member_info_list.    Error:    ' + str(ex)))
        return
