dse图python -没有这样的属性:g表示类: error

Question

我对dse图很陌生。我搞错了

没有这样的属性:g表示类: error

我做错什么了？

>>> from dse.cluster import Cluster, EXEC_PROFILE_GRAPH_SYSTEM_DEFAULT, GraphExecutionProfile
>>> from dse.graph import GraphOptions
>>> from dse.auth import PlainTextAuthProvider
>>> Auth_provider = PlainTextAuthProvider(username=<<username>>,
    password=<<password>>)
>>> ep = GraphExecutionProfile(graph_options=GraphOptions(graph_name='idg'))
>>> cluster = Cluster(database_cluster, auth_provider=auth_provider,
     execution_profiles={EXEC_PROFILE_GRAPH_SYSTEM_DEFAULT: ep})
>>> dse_session.execute_graph('g.V()')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "dse/cluster.py", line 2017, in dse.cluster.Session.execute_graph
  File "dse/cluster.py", line 3962, in dse.cluster.ResponseFuture.result
dse.InvalidRequest: Error from server: code=2200 [Invalid query] message="No such property: g for class: Script184"

>>> print(vars(ep.graph_options))
{'_graph_options': {'graph-name': b'idg', 'graph-source': b'g', 'graph-language': b'gremlin-groovy', 'graph-results': b'graphson-1.0'}}

Answer 1

在定义执行概要文件时，您需要使用EXEC_PROFILE_GRAPH_SYSTEM_DEFAULT而不是EXEC_PROFILE_GRAPH_DEFAULT。EXEC_PROFILE_GRAPH_SYSTEM_DEFAULT用于访问System来操作图形等。

您还需要通过session = cluster.connect()连接到集群(我在代码中没有看到)。

参见更多的例子的驱动程序文档。

Answer 2

现在起作用了。在我使用EXEC_PROFILE_GRAPH_DEFAULT作为执行概要文件之后

>>> from dse.cluster import Cluster, EXEC_PROFILE_GRAPH_DEFAULT, GraphExecutionProfile
>>> from dse.graph import GraphOptions,SimpleGraphStatement
>>> from dse.auth import PlainTextAuthProvider
>>> Auth_provider = PlainTextAuthProvider(<<username>>, <<password>>)
>>> ep = GraphExecutionProfile(graph_options=GraphOptions(graph_name='idg'))
>>> cluster = Cluster(database_cluster, auth_provider=auth_provider, execution_profiles={EXEC_PROFILE_GRAPH_DEFAULT: ep})
>>> dse_session = cluster.connect()
>>> dse_session.execute_graph('g.V()')
<dse.cluster.ResultSet object at 0x10f1fbef0>