Dash from dropdown中的多个输出

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([
    dcc.Dropdown(
        id='dropdown',
        options=[
            {'label': 'Option 1', 'value': 'option1'},
            {'label': 'Option 2', 'value': 'option2'},
            {'label': 'Option 3', 'value': 'option3'}
        ],
        value=['option1', 'option2'],  # 默认选择的选项
        multi=True  # 允许多选
    ),
    html.Div(id='output-div')
])

@app.callback(
    Output('output-div', 'children'),
    [Input('dropdown', 'value')]
)
def update_output(selected_options):
    if selected_options:
        return html.Div([
            html.Div('Selected options:'),
            html.Ul([html.Li(option) for option in selected_options])
        ])
    else:
        return 'No options selected.'

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