我可以让工具提示停留在plotly dash中的单击位置吗？

import dash
import dash_core_components as dcc
import dash_html_components as html

app = dash.Dash(__name__)

app.layout = html.Div(
    [
        dcc.Graph(
            id='example-graph',
            figure={
                'data': [
                    {'x': [1, 2, 3], 'y': [4, 1, 2], 'type': 'bar', 'name': 'SF'},
                    {'x': [1, 2, 3], 'y': [2, 4, 5], 'type': 'bar', 'name': u'Montréal'},
                ],
                'layout': {
                    'title': 'Dash Data Visualization',
                }
            }
        ),
        dcc.Tooltip(
            id='tooltip',
            target='example-graph',
            children=[
                html.P('This is a tooltip'),
                html.P('It will stay here when you click'),
            ],
            style={'opacity': 1}  # 设置透明度为1，使工具提示框一直可见
        )
    ]
)

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