py2neo cypher错误:KeyError:" u' cypher'

时间:2015-01-29 14:01:37

标签: neo4j cypher py2neo

我试图用py2neo 2.0(和Neo4j 2.1.6)执行cypher查询,但它失败并出现以下错误:

  

文件" C:\ Envs \ project \ lib \ site-packages \ py2neo \ core.py",第678行,cypher

     

self .__ cypher = CypherResource(元数据[" cypher"],metadata.get(" transaction"))   KeyError:" u' cypher'

调试时,我发现元数据属性没有cypher条目,但我想知道如何解决它。

enter image description here

1 个答案:

答案 0 :(得分:8)

使用无效的URI初始化py2neo.Graph时,可以重现此错误:

>>> from py2neo import Graph
>>> graph = Graph('http://localhost:7474')
>>> test = graph.cypher.execute('MATCH n RETURN n LIMIT 5')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/nicole/Envs/squid/lib/python2.7/site-packages/py2neo/core.py", line 678, in cypher
self.__cypher = CypherResource(metadata["cypher"],     metadata.get("transaction"))
KeyError: u'cypher'

也许Nigel可以证实,但根据我对py2neo 2.0的经验,您需要使用/db/data/端点初始化:

>>> from py2neo import Graph
>>> graph = Graph('http://localhost:7474/db/data/')
>>> test = graph.cypher.execute('MATCH n RETURN n LIMIT 5')