Plotly-Dash显示错误的图形(线形图而不是漏斗图)

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

app = dash.Dash(__name__)

app.layout = html.Div(
    children=[
        dcc.Graph(
            id='funnel-chart',
            figure={
                'data': [
                    go.Funnel(
                        y=['阶段1', '阶段2', '阶段3'],
                        x=[100, 50, 25]
                    )
                ],
                'layout': go.Layout(
                    title='漏斗图',
                    showlegend=True
                )
            }
        )
    ]
)

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