关于python:知识图谱抽取python

import csvfrom py2neo import Graph, Node, Relationship, NodeMatcherdef aa():    g = Graph('http://localhost:7474', user='neo4j', password='HTL123123',name='neo4j')  # 连贯neo4j，将'xxx'别离改为你的用户名和明码    # g.delete_all()  # 革除neo4j中原有的结点等所有信息    with open('C:/Users/h1531/Desktop/tea.csv', 'r', encoding='gbk') as f:        reader = csv.reader(f)        for item in reader:            # if reader.line_num==1:            #    continue            print("以后行数：", reader.line_num, "以后内容：", item)            start_node = Node("供应商名称", name=item[0])            end_node = Node("属性值", value=item[2])            relation = Relationship(start_node, item[1], end_node)            g.merge(start_node, "供应商名称", "name")            g.merge(end_node, "属性值", "value")            g.merge(relation, "产品总数量", "属性")if __name__ == '__main__':    aa()