Source code for graphscope.analytical.app.k_core

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
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from graphscope.framework.app import AppAssets
from graphscope.framework.app import not_compatible_for
from graphscope.framework.app import project_to_simple

__all__ = ["k_core"]


[docs]@project_to_simple @not_compatible_for("arrow_property", "dynamic_property") def k_core(graph, k: int): """K-cores of the graph are connected components that are left after all vertices of degree less than `k` have been removed. Args: graph (:class:`Graph`): A projected simple graph. k (int): The `k` for k-core. Returns: :class:`graphscope.framework.context.VertexDataContextDAGNode`: A context with each vertex assigned with a boolean: 1 if the vertex satisfies k-core, otherwise 0. 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.k_core(pg) s.close() """ return AppAssets(algo="kcore", context="vertex_data")(graph, k=k)