Source code for graphscope.analytical.app.bfs

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
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# Copyright 2020 Alibaba Group Holding Limited. All Rights Reserved.
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#     http://www.apache.org/licenses/LICENSE-2.0
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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__ = ["bfs"]


[docs]@project_to_simple @not_compatible_for("arrow_property", "dynamic_property") def bfs(graph, src=0): """Breadth first search from the src on projected simple graph. Args: graph (:class:`graphscope.Graph`): A simple graph. src (optional): Source vertex of breadth first search. The type should be consistent with the id type of the `graph`, that is, it's `int` or `str` depending on the `oid_type` is `int64_t` or `string` of the `graph`. Defaults to 0. Returns: :class:`graphscope.framework.context.VertexDataContextDAGNode`: A context with each vertex with a distance from the source, will be evaluated in eager mode. Examples: .. code:: python >>> import graphscope >>> from graphscope.dataset import load_p2p_network >>> sess = graphscope.session(cluster_type="hosts", mode="eager") >>> g = load_p2p_network(sess) >>> # project to a simple graph (if needed) >>> pg = g.project(vertices={"host": ["id"]}, edges={"connect": ["dist"]}) >>> c = graphscope.bfs(pg, src=6) >>> sess.close() """ return AppAssets(algo="bfs", context="vertex_data")(graph, src)