import dash_bootstrap_components as dbc
from dash import html

app = JupyterDash(__name__, external_stylesheets = [dbc.themes.BOOTSTRAP])

app.layout =  html.Div(
    [
        dbc.Row(dbc.Col(html.Div("A single column"))),
        dbc.Row(
            [
                dbc.Col(html.Div("One of three columns")),
                dbc.Col(html.Div("One of three columns")),
                dbc.Col(html.Div("One of three columns")),
            ]
        ),
    ]
)

app.run_server()
Dash app running on http://127.0.0.1:8050/

C:\Users\siddharth_black_pred\anaconda3\envs\geo_env\lib\site-packages\jupyter_dash\jupyter_app.py:139: UserWarning:

The 'environ['werkzeug.server.shutdown']' function is deprecated and will be removed in Werkzeug 2.1.