如何重命名networkx图的单个节点? [英] How to rename a single node of a networkx graph?

问题描述

我想知道如何更改有向图节点的单个节点名称.我是 networkx 的新手，只能找到有关如何更改所有节点名称的答案.

I wanted to know how I can change a single node name of a node of a digraph. I am new to networkx and could only find answers on how to change all node names.

在我的例子中，我遍历图 A 来创建图 B.p 和 c 是图 A 的节点.图的边 (p,c)A 包含我想添加到 B 的节点 p 的数据.但是，当我将图 A 的边数据添加到图 B 的现有节点 p 时，我想将 p 的名称更新为等于 c 的名称，这样我就可以为图 A 的下一条边再次引用它，因为它是边缘 (c,x) 和我可以使用 c 再次引用它...

In my case I am iterating over a graph A to create graph B. p and c are nodes of graph A. The edge (p,c) of graph A contains data I want to add to the node p of B. However, when I am adding the edge data from graph A to the already existing node p of graph B, I would like to update the name of p to be equal to the name of c so I am able to reference it again for the next edge of graph A because it then is the edge (c,x) and I can use the c to reference it again...

我的代码的相关部分看起来像这样

The relevant part of my code looks like this

new_stages = A.in_edge(c, data='stages')
stages = B.node[p]['stages']
stages.append(new_stages)
<<Update node p to have name of c??>> 
B.add_node(p, stages=new_stage_set)

感谢任何帮助，谢谢！

推荐答案

您有 nx.relabel_nodes 为此.这是一个简单的用例:

You have nx.relabel_nodes for this. Here's a simple use case:

G = nx.from_edgelist([('a','b'), ('f','g')])

mapping = {'b':'c'}
G = nx.relabel_nodes(G, mapping)

G.edges()
# EdgeView([('a', 'c'), ('f', 'g')])

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