Plotly Dash:如何从回调中打开外部链接？

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

app = dash.Dash(__name__)

app.layout = html.Div([
    dcc.Input(id='input', value=''),
    html.Button('打开链接', id='button'),
])

@app.callback(
    Output('button', 'n_clicks'),
    [Input('button', 'n_clicks')]
)
def open_link(n_clicks):
    if n_clicks is not None:
        webbrowser.open_new_tab('https://www.example.com')
    return n_clicks

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