如何在dash-leaflet中制作交互式世界地图？

import dash
import dash_core_components as dcc
import dash_html_components as html
import dash_leaflet as dl

app = dash.Dash(__name__)

map_container = dl.Map(center=[0, 0], zoom=2)

map_container.add_layer(dl.TileLayer())

marker = dl.Marker(position=[51.5, -0.09], children=[
    dl.Tooltip("London"),
    dl.Popup("This is London")
])
map_container.add_layer(marker)

app.layout = html.Div(children=[
    html.H1("Interactive World Map"),
    dcc.Graph(figure=map_container.to_dict())
])

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