[数据结构与算法]【可视化】python绘制马尔可夫链，绘制关系图，但是有问题

python绘制马尔可夫链，但是存在一些问题，E1–>E1的边小的看不见，不知道如何解决？

import numpy as np
P=np.array([[0.181, 0.454, 0.363],
       [0.555, 0.111, 0.333],
       [0.333, 0.444, 0.222]])



data=['E1','E2','E3']


for i in range(len(data)):
    for j in range(len(data)):
        print("opts.GraphLink(source='%s', target='%s', value=%s),"%(data[i],data[j],P[i][j]))
        
        
#from snapshot_selenium import snapshot as driver

from pyecharts import options as opts
from pyecharts.charts import Graph
from pyecharts.render import make_snapshot
from pyecharts import options as opts
from pyecharts.charts import Graph

nodes = [
    opts.GraphNode(name="E1", symbol_size=20),
    opts.GraphNode(name="E2", symbol_size=20),
    opts.GraphNode(name="E3", symbol_size=20),

]
links = [
opts.GraphLink(source='E1', target='E1', value=0.181),
opts.GraphLink(source='E1', target='E2', value=0.454),
opts.GraphLink(source='E1', target='E3', value=0.363),
opts.GraphLink(source='E2', target='E1', value=0.555),
opts.GraphLink(source='E2', target='E2', value=0.111),
opts.GraphLink(source='E2', target='E3', value=0.333),
opts.GraphLink(source='E3', target='E1', value=0.333),
opts.GraphLink(source='E3', target='E2', value=0.444),
opts.GraphLink(source='E3', target='E3', value=0.222),


]
c = (
    Graph()
    .add("", nodes,links,
         edge_symbol=['circle', 'arrow'], 
         repulsion=40000,
         edge_length=0.0001,
         is_draggable=True,
         linestyle_opts=opts.LineStyleOpts(curve=0.3, opacity=0.5),
         edge_label=opts.LabelOpts(
            is_show=True, position="middle", formatter='{c}',  #c就代表value
             font_size=20,
              color='black'
        ),
        )
    .set_global_opts(title_opts=opts.TitleOpts(title="马尔科夫链"))
    #.render("graph_with_options.html")
)

c.render_notebook()