python: simple example of working with neo4j

 

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# encoding: utf-8 # 版权所有 2025 ©涂聚文有限公司 # 许可信息查看：言語成了邀功盡責的功臣，還需要行爲每日來值班嗎 # 描述： pip install neo4j # pip install py2neo # Author    : geovindu,Geovin Du 涂聚文. # IDE       : PyCharm Community Edition 2024.3 python 3.11 # OS        : windows 10 # database  : mysql 9.0 sql server 2019, postgreSQL 17.0  oracle 11g oracle 20c  Neo4j 5.0 # https://neo4j.com/docs/python-manual/current/query-simple/ # https://neo4j.com/docs/getting-started/languages-guides/neo4j-python/ # https://github.com/neo4j-graph-examples/northwind/blob/main/code/python/example.py#L16-L21 # Datetime  : 2025/1/22 20:20 # User      : geovindu # Product   : PyCharm # Project   : ictsimple # File      : neo4jdemo.py # explain   : 学习    from neo4j import GraphDatabase       class GraphHelper:     """     """     def __init__(self, uri, user, password):         """         :param uri:         :param user:         :param password:         """         self.driver = GraphDatabase.driver(uri, auth=(user, password))        def close(self):         """         :return:         """         self.driver.close()           def printGreeting(self, message):         """         create_and_return_greeting         :param message:         :return:         """         with self.driver.session() as session:             greeting = session.execute_write(self.createQuery, message)             print("greeting:",type(greeting))                    def query(self):        """         查询        :param tx:        :param message:        :return:        """        records, summary, keys = self.driver.execute_query(             "MATCH (p:Person) RETURN p.name AS name",             database_= "neo4j",             )        # Loop through results and do something with them        for record in records:            print(record.data())  # obtain record as dict           # Summary information        print("The query `{query}` returned {records_count} records in {time} ms.".format(            query=summary.query, records_count=len(records),            time=summary.result_available_after        ))           return records              @staticmethod     def createQuery(tx, message):         """         返回是的对象         :param tx:         :param message:         :return:         """         result = tx.run("MATCH (n) RETURN n LIMIT 10", message=message)         print(result)         print("***********")         for s in result:             print(s.data())         print("***********")         return result              @staticmethod     def create_and_return_greeting(tx, message):         """         :param tx:         :param message:         :return:         """         result = tx.run("CREATE (a:Greeting) "                         "SET a.message = $message "                         "RETURN a.message + ', from node ' + id(a)", message=message)         return result.single()[0]       # http://localhost:7474/browser/ greeter = GraphHelper("bolt://localhost:7687", "neo4j", "geovindu") greeter.printGreeting("hello, world") print("####################################") greeter.query() greeter.close()