How to integrate here maps with dash?

Trying to integrate here maps with dash. here is my dash code

import dash
import dash_html_components as html

external_stylesheets = [
https://js.api.here.com/v3/3.1/mapsjs-ui.css
]

external_scripts = [
https://js.api.here.com/v3/3.1/mapsjs-core.js’,
https://js.api.here.com/v3/3.1/mapsjs-service.js’,
https://js.api.here.com/v3/3.1/mapsjs-ui.js’,
https://js.api.here.com/v3/3.1/mapsjs-mapevents.js
]

app = dash.Dash(name, external_stylesheets=external_stylesheets, external_scripts=external_scripts)

app.layout = html.Div([
html.Div(id=‘map’)
])

if name == “main”:
app.run_server(debug=True)

folder path:
main :
** assests
– demo.css
– demo.js
– style.css
** heredashpolyline.py

I’m following this : Polyline on the Map - Maps API for JavaScript - HERE Developer.

I want to display map with polyline. How can I achieve this?