python - Plotly - 如何在悬停时突出显示节点的路径？

Question

我有一个看起来像这样的图表：

生成图表的代码段如下所示：

import sys
import os

import numpy
import itertools
from lxml import etree 
import lxml.html

import re

import networkx as nx
import matplotlib.pyplot as plt

import pygraphviz

from networkx.drawing.nx_agraph import graphviz_layout

import plotly.graph_objects as go

G = nx.DiGraph()

#nodes and edges added around here

pos=graphviz_layout(G, prog='dot')

edge_trace = go.Scatter(
    x=edge_x, y=edge_y,
    line=dict(width=0.5, color='#888'),
    hoverinfo='none',
    mode='lines')

node_trace = go.Scatter(
    x=node_x, y=node_y,
    mode='markers',
    hoverinfo='text',
    marker=dict(size=10,line_width=2)
    )
            
node_trace.marker.color = color_list
node_trace.text = node_text

config = dict({'scrollZoom': True})

fig = go.Figure(data=[edge_trace, node_trace],
             layout=go.Layout(
                title='Comparison Results: ',
                titlefont_size=16,
                showlegend=False,
                hovermode='closest',
                margin=dict(b=80,l=10,r=10,t=40),
                annotations=[ dict(
                    text="",
                    showarrow=False,
                    xref="paper", yref="paper",
                    x=0.005, y=-0.002 ) ],
                xaxis=dict(showgrid=False, zeroline=False, showticklabels=False),
                yaxis=dict(showgrid=False, zeroline=False, showticklabels=False))
                )

fig.update_layout(dragmode='pan')

fig.show(config=config)

我如何做到这一点，以便当我将鼠标悬停在一个节点上时，一直突出显示到根节点的路径？

任何帮助深表感谢。提前致谢！

标签： pythonplotly