使用Python Graphene设置一个值并获取多个值

我想建立一个graphenepythonapi，当提供域名时，它可以让用户查询主机、注册器或两者。此时，我只希望能够在任何其他

resolve

方法中访问传入的域名

似乎我不能使用

self

来存储传入的域名，因为其计算结果为

None

如对以下代码有任何建议，将不胜感激

import graphene


class DomainInput(graphene.InputObjectType):
    dname = graphene.String()


class DomainName(graphene.ObjectType):
    name = graphene.String()


class Host(graphene.ObjectType):
    name = graphene.String()


class Registrar(graphene.ObjectType):
    name = graphene.String()


class Query(graphene.ObjectType):
    domainname = graphene.Field(Host, domain=DomainInput())
    host = graphene.String()
    registrar = graphene.String()

    def __init__(self):
        self.domain_name = ''

    def resolve_domainname(self, args, context, info):
        domain = args.get('domain')
        self.domain_name = domain.get('dname')
        return DomainName(name='For domain name: {}'.format(self.domain_name))

    def resolve_host(self, args, context, info):
        return Host(name='HOST for '.format(self.domain_name))

    def resolve_registrar(self, args, context, info):
        return Registrar(name='REGISTRAR for '.format(self.domain_name))


if __name__ == '__main__':
    di = graphene.Schema(query=Query)
    query = '''
        query something{
            domainname(domain: {dname:"a.com"}) { name }
            host
            registrar
        }
    '''
    result = di.execute(query)

    print result.data

这将返回以下内容：

OrderedDict([('domainQuery', OrderedDict([('domain', u'a.com'), ('host', OrderedDict([('name', 'The Host for a.com')])), ('registrar', OrderedDict([('name', 'The Registrar for a.com')]))]))])

OrderedDict([('domainQuery', OrderedDict([('domain', u'a.com'), ('host', OrderedDict([('name', 'The Host for a.com')])), ('registrar', OrderedDict([('name', 'The Registrar for a.com')]))]))])