python:如何在dash应用程序中绘制Sankey图

import dash
import dash_core_components as dcc
import dash_html_components as html
import plotly.graph_objects as go

# 创建Dash应用程序
app = dash.Dash(__name__)

# 定义Sankey图的节点和链接
nodes = [
    {'label': 'Node A'},
    {'label': 'Node B'},
    {'label': 'Node C'},
    {'label': 'Node D'}
]

links = [
    {'source': 0, 'target': 1, 'value': 10},
    {'source': 1, 'target': 2, 'value': 5},
    {'source': 2, 'target': 3, 'value': 3}
]

# 创建Sankey图的图表对象
fig = go.Figure(data=[go.Sankey(
    node=dict(
        label=[node['label'] for node in nodes]
    ),
    link=dict(
        source=[link['source'] for link in links],
        target=[link['target'] for link in links],
        value=[link['value'] for link in links]
    ))])

# 在Dash应用程序中显示Sankey图
app.layout = html.Div([
    dcc.Graph(figure=fig)
])

if __name__ == '__main__':
    app.run_server(debug=True)