Dash Python如何制作多个更新图，如何标题

import dash
import dash_core_components as dcc
import dash_html_components as html
from dash.dependencies import Input, Output

app = dash.Dash(__name__)

app.layout = html.Div([
    html.H1('多个更新图示例'),
    dcc.Graph(id='graph1'),
    dcc.Graph(id='graph2'),
    dcc.Graph(id='graph3')
])

@app.callback(
    Output('graph1', 'figure'),
    Output('graph2', 'figure'),
    Output('graph3', 'figure'),
    Input('input', 'value')
)
def update_graph(value):
    # 在这里根据输入的值更新图表数据和布局
    # 返回更新后的图表对象
    return figure1, figure2, figure3

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