How to get the nodes size of Sankey diagram?

📊 Plotly Python
1

I want to get the relative width (0~1) of the rightest nodes in Sankey diagram.

Here’s an example:

import plotly.graph_objects as go

fig = go.Figure(data=[go.Sankey(
    node = dict(
      pad = 15,
      thickness = 20,
      line = dict(color = "black", width = 0.5),
      label = ["A1", "A2", "B1", "B2", "C1", "C2"],
      color = "blue"
    ),
    link = dict(
      source = [0, 1, 0, 2, 3, 3], # indices correspond to labels, eg A1, A2, A1, B1, ...
      target = [2, 3, 3, 4, 4, 5],
      value = [8, 4, 2, 8, 4, 2]
  ))])

fig.update_layout(font_size=60)
fig.show()

image
image3056×852 157 KB

How to get the relative height (0~1) of C1 and C2 in the final figure? Because I want to create bar plots that have the same height as C1 and C2, I need the actual/final height which may be affected by the font size.