how can I get the isolated nodes in a graph?

[BodyCSoulN]

Hi, thanks for your great job.
There is method called has_isolated_nodes().
I want to know how can I get these isolated nodes?

Because I have a graph stored in a neo4j database.

I can't find a isolated node in neo4j.
But when I convert this graph to pyg data, has_isolated_nodes() returns True.

I don't know what went wrong？
Can you help me.

[rusty1s]

How about

unique = data.edge_index.view(-1).unique()

mask = torch.ones(data.num_nodes, dtype=torch.bool)
mask[unique] = False

print(mask.nonzero())  # The indices of all isolated nodes.