CODEWITHSUNDEEP
pythonneo4jpy2neo
Aaron Bramson
Aaron Bramson

Reputation: 1288

How to print the relationship types contained in a graph

Here is another basic question for some basic functionality of py2neo (v4) that does not work in the intuitive way.

How to get/print the list of existing relationship types?

In the documentation's graph section of the database page there is a method relationship_types which supposedly returns "The set of relationship types currently defined within the graph.", and I expected it to work like this:

print(graph.relationship_types)

but I get the error 'Graph' object has no attribute 'relationship_types'.

But if that's the case, what does have that attribute? There is no example of using this method on that page (or anywhere else I could find), and I am having trouble with a lot of the basic functionality of py2neo for similar reasons.

Upvotes: 1

Views: 644

Answers (2)

Ivan Jacobs
Ivan Jacobs

Reputation: 178

for rel in grap.ralationships:
    print('from:',rel.start_node)
    print('to:',rel.end_node)
    print('drum role.... ding ding ding Rel TYPE:',type(r).__name__)

list of types of rels:

set([type(r).__name__ for r in in graph.ralationships])

hope this helps some one

Upvotes: 2

Himanshu Jain
Himanshu Jain

Reputation: 1818

The property that you mentioned is not only in V4 but in V3 as well. Chances are that you are not using the property properly.

Here is a really simple example which works for me (v3.1.2). Same code is working on V4.1.0 too.

from py2neo import Graph

graph = Graph("http://localhost:7474", username="USERNAME", password="PASSWORD")

print(graph.relationship_types)

Upvotes: 0

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