向Dash-Plotly Python仪表板添加水平线

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

app = dash.Dash()

app.layout = html.Div(
    children=[
        dcc.Graph(
            id='example-graph',
            figure={
                'data': [
                    go.Scatter(
                        x=[1, 2, 3, 4, 5],
                        y=[2, 4, 1, 5, 3],
                        mode='lines',
                        name='data'
                    )
                ],
                'layout': go.Layout(
                    title='Example Graph',
                    shapes=[
                        {
                            'type': 'line',
                            'x0': 0,
                            'x1': 5,
                            'y0': 3,
                            'y1': 3,
                            'line': {
                                'color': 'red',
                                'width': 2,
                                'dash': 'dashdot'
                            }
                        }
                    ]
                )
            }
        )
    ]
)

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