Which Elements From Networkx Graph Might Become Labels At Neo4j Graph?

I have a MultiDiGraph in networkx and I am thinking about exporting it to neo4j. I have already a property for the nodes called ntype and a property for the edges called dtype whic

Solution 1:

I made some reserch and finally I have got a process to be able to export a networkx graph into a neo4j graph managing the labels. Some details have to be considered:

1.- When creating the nodes: the property to become a label at neo4j must be named as labels (notice that it is in plural, do not ask why, it works). Its value must be a string starting with ':'

G.add_nodes_from([(1,{'labels':':NUMBER', 'color':'blue'}), ('A',{'labels':':LETTER', 'state':'done'})])

2.- When creating the edges: the property to become a label at neo4j must be named as label (now it is in singular!!). Its value must be a string starting with ':'

G.add_edges_from([(1,'A','dir',{'label':'IMPACTS', 'when':'old'})])

3.- For MultiDiGraph the k value is not going to be imported. My workarround is to duplicate k as an edge property called, for exampel id.

for u,v,k in G.edges(keys=True):
G[u][v][k]['id']=k

4.- Export networkx graph to graphml using named_key_ids=True

nx.write_graphml(G, 'test.graphml', named_key_ids=True)

5.- Import to neo4j with parameteres readLabels: true and storeNodeIds:true. At neo4j browser you might have:

CALL apoc.import.graphml("test.graphml", {readLabels: true, storeNodeIds:true})

Here I include a graph created in networkx that can be imported to neo4j as described:

import networkx as nx

G=nx.MultiDiGraph()

#creation of nodes with property called 'labels'
G.add_nodes_from([
    (1,{'labels':':NUMBER', 'color':'blue'}),
    (2,{'labels':':NUMBER', 'color':'yellow'}),
    ('A',{'labels':':LETTER', 'state':'done'}),
    ('B',{'labels':':LETTER', 'state':'pending'})
    ])
#creation of edges with property called 'label'
G.add_edges_from([
    (1,'A','dir',{'label':'IMPACTS', 'when':'old'}),
    (1,'A','n_dir',{'label':'IMPACTS', 'when':'new'}),
    (1,'B','n_dir',{'label':'ALTS', 'when':'future'}),
    (2,'B','dir',{'label':'IMPACTS', 'when':'new'}),
    (2,'B','n_dir',{'label':'IMPACTS', 'when':'old'}),
    (2,'A','n_dir',{'label':'ALTS', 'when':'new'}),
    ])
#k is duplicated at every node as a propertyfor u,v,k in G.edges(keys=True):
    G[u][v][k]['id']=k

nx.write_graphml(G, 'test.graphml', named_key_ids=True)

What is pending? To figure out how to assing to a node or an edge more than one label. Any help will be welcome