有没有办法格式化绘制Sankey图显示？

Question

我正在创建一个桑基图，如下所示：

import plotly.graph_objects as go

fig = go.Figure(data=[go.Sankey(
        valueformat = ".0f",
        valuesuffix = " %",
        orientation = "h",
        node = dict(
          pad = 20,
          thickness = 20,
          line = dict(color = "red", width = 1),
          label = ['Equity',
                   'Global Equity',
                   'Tier 1',
                   'A looooooooooong',
                   'Tier 2',
                   'B looooooooooong',
                   'C looooooooooong',
                   'Tier 3',
                   'D looooooooooong',
                   'E looooooooooong',
                   'F looooooooooong',
                   'G looooooooooong',
                   'H looooooooooong'],
          color = ['aqua',
                 'aqua',
                 'yellow',
                 'orange',
                 'yellow',
                 'orange',
                 'orange',
                 'yellow',
                 'orange',
                 'orange',
                 'orange',
                 'orange',
                 'orange'],
        ),
        link = dict(
          source = [0, 2, 1, 4, 4, 2, 7, 7, 7, 7, 7, 4],
          target = [1, 3, 2, 5, 6, 4, 8, 9, 10, 11, 12, 7],
          value = [1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0],
          color = ['aqua',
                 'yellow',
                 'aqua',
                 'yellow',
                 'yellow',
                 'aqua',
                 'yellow',
                 'yellow',
                 'yellow',
                 'yellow',
                 'yellow',
                 'aqua'],
            hovertemplate='This link has total value %{value}<extra></extra>'
      ))])
    
    fig.update_layout(title_text="Waterfall Diagram", 
                      font_size=16,
                      plot_bgcolor='white',
                      paper_bgcolor='white')
    fig.show()

输出如下所示：

有没有办法：

1. 确保浅绿色的链接始终位于黄色链接的下方？为了在视觉上更好地将它们分开 - 我不确定为什么当前的设置以这种顺序显示它们，
2. 以便在链接之间留出更多空间，从而将它们分散得更多？特别是我需要链接和节点不相互重叠，
3. 进一步展开水绿色链接？即在视觉上将它们与其他节点分离
4. 以控制节点标签的显示位置和方式？即到右侧或下方节点，并控制每个节点的字体

Answer 1

对于 1, 2, & 3，您可以按如下方式显式设置节点位置：

import plotly.graph_objects as go

fig = go.Figure(go.Sankey(
    arrangement = "snap",
    node = {
        "label": ["A", "B", "C", "D", "E", "F"],
        "x": [0.2, 0.1, 0.5, 0.7, 0.3, 0.5], #these are fractions of the domain (0,1)
        "y": [0.7, 0.5, 0.2, 0.4, 0.2, 0.3],
        'pad':10},  # 10 Pixels
    link = {
        "source": [0, 0, 1, 2, 5, 4, 3, 5],
        "target": [5, 3, 4, 3, 0, 2, 2, 3],
        "value": [1, 2, 1, 1, 1, 1, 1, 2]}))

fig.show()

来自plotly 文档的示例。