subgraph Module

The py2neo.subgraph module allows abstract subgraph data to be merged into a database in a single step. For example:

abstract = {
    "People": {
        "__uniquekey__": "email",
        "__nodes__": {
            "alice": {"name": "Alice", "email": "alice@example.com"},
            "bob":   {"name": "Bob", "email": "bob@example.com"}
        },
        "__rels__": [
            ["alice", "KNOWS", "bob"]
        ]
    }
}
nodes = subgraph.merge(abstract, self.graph_db)
alice, bob = nodes["People"]["alice"], nodes["People"]["bob"]

class py2neo.subgraph.Subgraph(abstract)

Bases: object

class Category(name, data)

Bases: object

unique_nodes

Return all nodes which contain the key designated as unique.

Subgraph.has_rels

Subgraph.merge(graph_db)

Subgraph.nodes

py2neo.subgraph.merge(abstract, graph_db)

Merge an abstract subgraph into a graph database.

Parameters:

• abstract – abstract subgraph data
• graph_db – the graph into which to merge the data

Returns:

collection of subgraph nodes