不会出现阴暗的Sankey可视化节点标签

Question

我正在尝试创建sankey图，但是无法填充节点（目标或源）标签。填充值（尽管格式笨拙）。我浏览了许多帖子都无济于事。我什至尝试仅拔出预期的标签并替换为填充物，但这也不起作用。任何帮助都将不胜感激...

import plotly as ply
import urllib

graph_data = dict (type='sankey',
                  domain = dict(
                      x = [0, 1],
                      y = [0, 1]),

                  orientation = 'h',
                  valueformat = '.0f',
                  node = dict(
                      pad = 10,
                      thickness = 30,
                      line = dict(
                          color = 'black',
                          width = 0),
                      #label = pd.concat([conf_client_table['item_x_group'], conf_client_table['item_y_group']], ignore_index=True))
                      label = ['20', '21', '22', '23', '24', '25']
                  ),
                  link = dict(
                      source = conf_client_table['item_x_group'],
                      target = conf_client_table['item_y_group'],
                      value = conf_client_table['conf_score'],
                      label = conf_client_table['conf_score']
                      )
                  )
layout = dict(
    title = 'test',
    height = 400,
    width = 600,
    font = dict(
        size=10
    )
)

fig = dict(data=[graph_data], layout=layout)
ply.offline.plot(fig)