Passing node object as parameter in graph query Py2neo

Question

I have the following code in which I am obtaining a node. How can I pass it to graph.evaluate as a parameter. Is there a possible method to do so if this is incorrect ? Or some alternative method

user_node = selector.select("User", user_id=95)
lib_node = graph.evaluate("match {param}-[:LISTENS_TO]->(p) return p", param=dict(user_node))

the above throws value error

ValueError: dictionary update sequence element #0 has length 6; 2 is required

score 0 · Accepted Answer · answered Jul 27 '16 at 11:03

0

The select method returns a selection of as many matches as it can find. This may or may not be a sequence of one but either way, you'll need to use the .first() method to grab the first (and probably only) one returned.

http://py2neo.org/v3/database.html#py2neo.database.selection.NodeSelection.first

answered Jul 27 '16 at 11:03

Nigel Small

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can the node then be passed as parameter itself to graph.evaluate as above line 2 – aradhyamathur Jul 27 '16 at 11:31
I am trying to pass the node object itself as a parameter and not just its property values – aradhyamathur Jul 27 '16 at 11:32
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No, you cannot use graphy objects (nodes, rels or paths) as parameters. – Nigel Small Jul 27 '16 at 20:01

Passing node object as parameter in graph query Py2neo

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