neo4j传参数量问题

TypeError: init() takes from 1 to 3 positional arguments but 4 were given
说是需要传1到3个参数，我传了4个，第四个是啥？应该在哪里改参数呀

 def __init__(self):
        """建立连接"""
        link = Graph("http://localhost:7474", "neo4j", "123456")
        self.graph = link
        #self.graph = NodeMatcher(link)
        # 定义label
        self.bclass = 'class'
        self.subcategory = 'subcategory'
        self.graph.delete_all()
        self.matcher = NodeMatcher(link)

可以打开graph的api看一下