17.2.1 Loading a Graph
The following describes the steps for loading a graph:
- Create a Session and an Analyst.
cd /opt/oracle/graph/ ./bin/opg4j // starting the shell will create an implicit session and analyst opg4j> import oracle.pgx.config.mllib.ActivationFunction opg4j> import oracle.pgx.config.mllib.WeightInitScheme
import oracle.pgx.api.*; import oracle.pgx.api.mllib.SupervisedGraphWiseModel; import oracle.pgx.api.filter.VertexFilter; import oracle.pgx.api.frames.*; import oracle.pgx.config.mllib.ActivationFunction; import oracle.pgx.config.mllib.GraphWiseConvLayerConfig; import oracle.pgx.config.mllib.GraphWisePredictionLayerConfig; import oracle.pgx.config.mllib.SupervisedGraphWiseModelConfig; import oracle.pgx.config.mllib.WeightInitScheme;
# starting the Python shell will create an implicit session and analyst
- Load the graph.
opg4j> var instance = GraphServer.getInstance("https://localhost:7007", "<username>", "<password>".toCharArray()) opg4j> var session=instance.createSession("mySession") opg4j> var fullGraph = session.readGraphByName("<cora_graph>",GraphSource.PG_PGQL) opg4j> var filter = VertexFilter.fromPgqlResultSet(session.queryPgql("SELECT v FROM cora MATCH (v) WHERE ID(v) % 4 > 0"), "v") opg4j> var trainGraph = fullGraph.filter(filter) opg4j> var testVertices = fullGraph.getVertices(). stream(). filter(v -> !trainGraph.hasVertex(v.getId())). collect(Collectors.toList())
ServerInstance instance = GraphServer.getInstance("https://localhost:7007", "<username>", "<password>".toCharArray()); PgxSession session = instance.createSession("my-session"); PgxGraph fullGraph = session.readGraphByName("<cora_graph>",GraphSource.PG_PGQL); VertexFilterfilter = VertexFilter.fromPgqlResultSet(session.queryPgql("SELECT v FROM cora MATCH (v) WHERE ID(v) % 4 > 0"),"v");PgxGraphtrainGraph=fullGraph.filter(filter); PgxGraph trainGraph = fullGraph.filter(filter); List<PgxVertex> testVertices = fullGraph.getVertices() .stream() .filter(v->!trainGraph.hasVertex(v.getId())) .collect(Collectors.toList());
from pypgx.api.filters import VertexFilter instance = graph_server.get_instance("https://localhost:7007","<username>","<password>") session = instance.create_session("my_session") full_graph = session.read_graph_by_name("<cora_graph>", "pg_pgql") vertex_filter = VertexFilter.from_pgql_result_set(session.query_pgql("SELECT v FROM cora MATCH (v) WHERE ID(v) % 4 > 0"),"v") train_graph = full_graph.filter(vertex_filter) test_vertices = [] train_vertices = train_graph.get_vertices() for v in full_graph.get_vertices(): if(not train_vertices.contains(v)): test_vertices.append(v)