How to use the distro.Distro function in distro

def parse_isolist(self, isolist_path):
        log.debug('Parsing isolist=%s' % isolist_path)
        isolist = ConfigParser.ConfigParser()
        isolist.read(isolist_path)
        distros = []
        for distro in isolist.sections():
            log.debug('  Adding distro %s' % distro)
            kargs = dict(isolist.items(distro))
            kargs['backend'] = self
            distros.append(Distro(**kargs))
            #order is lost in configparser, use the ordering attribute
        def compfunc(x, y):
            if x.ordering == y.ordering:
                return 0
            elif x.ordering > y.ordering:
                return 1
            else:
                return -1
        distros.sort(compfunc)
        return distros

def parse_isolist(self, isolist_path):
        log.debug('Parsing isolist=%s' % isolist_path)
        isolist = ConfigParser.ConfigParser()
        isolist.read(isolist_path)
        distros = []
        for distro in isolist.sections():
            log.debug('  Adding distro %s' % distro)
            kargs = dict(isolist.items(distro))
            kargs['backend'] = self
            distros.append(Distro(**kargs))
            #order is lost in configparser, use the ordering attribute
        def compfunc(x, y):
            if x.ordering == y.ordering:
                return 0
            elif x.ordering > y.ordering:
                return 1
            else:
                return -1
        distros.sort(compfunc)
        return distros

def parse_isolist(self, isolist_path):
        log.debug('Parsing isolist=%s' % isolist_path)
        isolist = ConfigParser.ConfigParser()
        isolist.read(isolist_path)
        distros = []
        for distro in isolist.sections():
            log.debug('  Adding distro %s' % distro)
            kargs = dict(isolist.items(distro))
            kargs['backend'] = self
            distros.append(Distro(**kargs))
            #order is lost in configparser, use the ordering attribute
        def compfunc(x, y):
            if x.ordering == y.ordering:
                return 0
            elif x.ordering > y.ordering:
                return 1
            else:
                return -1
        distros.sort(compfunc)
        return distros