Python Dash DataTable:行选择不起作用

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.DataTable(
        id='datatable',
        # 其他DataTable属性配置
    ),
    # 其他组件
])

@app.callback(
    Output('datatable', 'selected_rows'),
    [Input('datatable', 'derived_virtual_data'),
     Input('datatable', 'derived_virtual_selected_rows')])
def update_selected_rows(derived_virtual_data, derived_virtual_selected_rows):
    if derived_virtual_selected_rows is None:
        derived_virtual_selected_rows = []
    return derived_virtual_selected_rows

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