Plotly: Checklist回调前的提交按钮？

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.Checklist(
        id='checklist',
        options=[
            {'label': 'Option 1', 'value': 'option1'},
            {'label': 'Option 2', 'value': 'option2'},
            {'label': 'Option 3', 'value': 'option3'}
        ],
        value=[]
    ),
    html.Button('Submit', id='submit-button', n_clicks=0),
    html.Div(id='output')
])

@app.callback(
    Output('output', 'children'),
    [Input('submit-button', 'n_clicks')],
    [State('checklist', 'value')]
)
def update_output(n_clicks, checklist_value):
    if n_clicks > 0:
        # 在这里执行回调函数的操作
        return f'你选择了：{checklist_value}'
    else:
        return ''

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