我想建立组织结构图。如下所示：

A - B - C
B - C - D
A - E

这意味着A监督B，B监督C，C监督D，而A监督E。我想知道是否可以通过将每个员工用作节点来构建树图。

A - B - C - D 
|
E

一些代码如下，我不知道如何将其应用于我当前的人力资源数据。

pip install python-igraph
import igraph
from igraph import Graph,EdgeSeq
nr_vertices = 25
v_label = list(map(str,range(nr_vertices)))
G = Graph.Tree(nr_vertices,2) # 2 stands for children number
lay = G.layout('rt')

position = {k: lay[k] for k in range(nr_vertices)}
Y = [lay[k][1] for k in range(nr_vertices)]
M = max(Y)

es = EdgeSeq(G) # sequence of edges
E = [e.tuple for e in G.es] # list of edges

L = len(position)
Xn = [position[k][0] for k in range(L)]
Yn = [2*M-position[k][1] for k in range(L)]
Xe = []
Ye = []
for edge in E:
    Xe+=[position[edge[0]][0],position[edge[1]][0],None]
    Ye+=[2*M-position[edge[0]][1],2*M-position[edge[1]][1],None]

labels = v_label

import plotly.graph_objects as go
fig = go.Figure()
fig.add_trace(go.Scatter(x=Xe,y=Ye,mode='lines',line=dict(color='rgb(210,210,210)',width=4),hoverinfo='none'
               ))
fig.add_trace(go.Scatter(x=Xn,y=Yn,mode='markers',name='bla',marker=dict(symbol='circle-dot',size=28,color='#6175c1',#'#DB4551',line=dict(color='rgb(50,50,50)',width=1)
                            ),text=labels,hoverinfo='text',opacity=0.8
              ))

def make_annotations(pos,text,font_size=15,font_color='rgb(250,250,250)'):
    L=len(pos)
    if len(text)!=L:
        raise ValueError('The lists pos and text must have the same len')
    annotations = []
    for k in range(L):
        annotations.append(
            dict(
                text=labels[k],# or replace labels with a different list for the text within the circle
            x=pos[k][0],y=2*M-position[k][1],xref='x1',yref='y1',font=dict(color=font_color,size=font_size),showarrow=False)
    )
return annotations

axis = dict(showline=False,# hide axis line,grid,ticklabels and  title
        zeroline=False,showgrid=False,showticklabels=False,)

fig.update_layout(title= 'Tree with Reingold-Tilford Layout',annotations=make_annotations(position,v_label),font_size=12,showlegend=False,xaxis=axis,yaxis=axis,margin=dict(l=40,r=40,b=85,t=100),hovermode='closest',plot_bgcolor='rgb(248,248,248)'
          )
fig.show()

我不知道圆圈中的数字如何显示。相反，我希望在圈子中显示员工的姓名。 有人可以帮忙吗？