Can we create a node in Neo4j having properties as dictionary using Python package py2neo?

Question

I want to create a node having properties in dictionary using py2neo.

query = CREATE (movie:Movie {'a': 'b', 'c': 'd'}) RETURN movie

graph_db.cypher.execute(query)

Then it given an error.

So I need to change the properties of my node to {a: 'b', c: 'd'}.

Is there a way I can do it using py2neo? Or any alternate way?

Thanks

score 3 · Answer 1 · answered Feb 09 '16 at 17:39

3

You can use query parameters to create a node as described here: http://neo4j.com/docs/stable/cypher-parameters.html

parameter_dict = {'params': {'a': 'b', 'c': 'd'}}

query = "CREATE (movie:Movie {params}) RETURN movie"

graph.cypher.execute(query, parameters=parameter_dict)

answered Feb 09 '16 at 17:39

Martin Preusse

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I tried to run this query today and graph.cypher is not recognized as a valid attribute. Was this a change from v2 to v3 of py2neo? I tried researching this in the documentation but no luck, – Will H Jun 19 '17 at 16:51
this is late to the party but the following is the way it's done at v4: `graph.run(query)` -- also strongly recommend using python fstrings. – Williams May 13 '19 at 00:48
Do you have any idea, how to do that in golang? – mostafa8026 Jul 10 '20 at 15:53

score 3 · Answer 2 · answered Mar 11 '17 at 04:08

The following is py2neo v3 code to create a movie node with 'a' and 'b' properites using a dictionary

    import py2neo

    from py2neo import Graph, Node

    def authenticateAndConnect():
        # Authenticate
        py2neo.authenticate('localhost:7474', '<yourUserName>', '<yourPassword>')

        # Connect (your folder names may be different)
        return Graph('http://localhost:7474/default.graphdb/data/')

    def foo():
        graph = authenticateAndConnect()

        # Define a list of labels
        labels = [ 'Movie' ]

        # Define a dictionary
        properties = {'a': 'b', 'c':'d'}

        node = Node(*labels, **properties)
        graph.create(node)


    if __name__ == '__main__':
        foo()

score 0 · Answer 3 · answered Feb 22 '21 at 16:34

This will work in the py2neo package (current version 2021.0.1)

from py2neo import Graph
graph_db = Graph()

query = "CREATE (movie:Movie $props) RETURN movie"
graph_db.run(query, props={'a': 'b', 'c': 'd'})

as well as the official neo4j package

from neo4j import GraphDatabase
driver = GraphDatabase.driver()
graph_db = driver.session()

query = "CREATE (movie:Movie $props) RETURN movie"
graph_db.run(query, props={'a': 'b', 'c': 'd'})

Can we create a node in Neo4j having properties as dictionary using Python package py2neo?

3 Answers3