Source code for graphscope.analytical.app.degree_centrality

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#
# Copyright 2020 Alibaba Group Holding Limited. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#


from graphscope.framework.app import AppAssets
from graphscope.framework.app import not_compatible_for
from graphscope.framework.app import project_to_simple

__all__ = ["degree_centrality"]


[docs]@project_to_simple @not_compatible_for("arrow_property", "dynamic_property") def degree_centrality(graph, centrality_type="both"): """The degree centrality values are normalized by dividing by the maximum possible degree in a simple graph n-1 where n is the number of nodes in G. Args: graph (:class:`Graph`): A projected simple graph. centrality_type (str, optional): Available options are in/out/both. Defaults to "both". Returns: :class:`graphscope.framework.context.VertexDataContextDAGNode`: A context with each vertex assigned with the computed degree centrality, evaluated in eager mode. Examples: .. code:: python import graphscope as gs sess = gs.session() g = sess.g() pg = g.project(vertices={"vlabel": []}, edges={"elabel": []}) r = gs.degree_centrality(pg, centrality_type="both") s.close() """ centrality_type = str(centrality_type) return AppAssets(algo="degree_centrality", context="vertex_data")( graph, centrality_type )