neo4j BOLT驅動程序中的py2neo命令

Question

我有一個使用py2neo用python編寫的命令來訪問交換的名稱。 這可行。

graph = Graph()
stmt = 'MATCH (i:Index{uniqueID: 'SPY'})-[r:belongsTo]->(e:Exchange) RETURN e.name'
exchName = graph.cypher.execute(stmt)[0][0]

可以將其轉換為BOLT neo4j-driver語句嗎？ 我總是會出錯。 我想避免在StatementStatement中循環的迭代器語句。

driver = GraphDatabase.driver("bolt://localhost", auth=basic_auth("neo4j", "neo4j"))
session = driver.session()
stmt = 'MATCH (i:Index{uniqueID: 'SPY'})-[r:belongsTo]->(e:Exchange) RETURN e.name'
exchName = session.run(stmt)[0][0]
TypeError: 'StatementResult' object is not subscriptable

Answer 1

嘗試將session.run()的結果存儲在list以保留它們：

driver = GraphDatabase.driver("bolt://localhost", auth=basic_auth("neo4j", "neo4j"))
session = driver.session()
stmt = 'MATCH (i:Index{uniqueID: 'SPY'})-[r:belongsTo]->(e:Exchange) RETURN e.name'

# transform to list to retain result
exchName = list(session.run(stmt))[0][0]

參見文檔： http : //neo4j.com/docs/developer-manual/current/#result-retain