adding labels with python-embedded (2.0)

[tcb]

Hi,

I'm using 2.0.0-M02 and I'm trying to add a label to a node which I create from python

node = db.node(name='testname')

node.addLabel('User')

It seems there are various functions for labels available from the python site- filtering on dir(node) I see it knows about these:

addLabel

getLabels

hasLabel

removeLabel

But when I try to call addLabel I get this error:

 

----> 1 node.addLabel('User')

/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/neo4j/_backend.py in decorator(*args, **kwargs)
    181                 if not jpype.isThreadAttachedToJVM():
    182                     jpype.attachThreadToJVM()
--> 183                 return fn(*args, **kwargs)
    184             return decorator
    185 

RuntimeError: No matching overloads found. at src/native/common/jp_method.cpp:121

I can do what I need with cypher, but I find its a bit slower. If the fix is something simple and you can point me to it, I'll happily look into it.

thanks,

 

[Peter Neubauer]

Hi there,
are you sure the library is even working with 2.0? Are there tests etc
for it? I am not sure. it might be that it needs to be upgraded, which
I strongly encourage you to do!

/peter

Cheers,

/peter neubauer

G: neubauer.peter
S: peter.neubauer
P: +46 704 106975
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The authoritative book on graph databases - http://graphdatabases.com
Neo4j questions? Please use SO - http://stackoverflow.com/search?q=neo4j

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[David Knapp]

I have an updated python embedded library for 2.0-M2

https://github.com/Falmarri/python-embedded

[Peter Neubauer]

That is supernice David!

Mind providing a pull request back, so we can look at it? Did you
provide any testcases or docs around labels and indexes with Cypher?

/peter

Cheers,

/peter neubauer

G: neubauer.peter
S: peter.neubauer
P: +46 704 106975
L: http://www.linkedin.com/in/neubauer
T: @peterneubauer

The authoritative book on graph databases - http://graphdatabases.com
Neo4j questions? Please use SO - http://stackoverflow.com/search?q=neo4j

[David Knapp]

I already issued a pull request. I think it's a couple of commits behind though, so I can issue another one.

I didn't really write any test cases for the new work, mainly because my JVM would segfault when maven would try to run the tests. So I would always build with skiptests. I've been using it pretty heavily though.

The only issue I've come accross is that with the new indexes, you MUST call db.shutdown() and wait for ALL INDEXES to come online. Otherwise they get into a really bad state and can't recover. This isn't anything to do with the python though, it seems to be an issue with neo4j itself as it was brought up in a couple other posts here.