app.py

# -*- coding: utf-8 -*-
import dash
import dash_bootstrap_components as dbc


# Styling
# external_stylesheets = ['https://codepen.io/chriddyp/pen/bWLwgP.css']
# external CSS stylesheets
external_stylesheets = [
    'https://codepen.io/chriddyp/pen/bWLwgP.css',
    {
        'href': 'https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css',
        'rel': 'stylesheet',
        'integrity': 'sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO',
        'crossorigin': 'anonymous'
    }
]

# Create app
app = dash.Dash(__name__, external_stylesheets=[dbc.themes.BOOTSTRAP],
                meta_tags=[
                    {"name": "viewport", "content": "width=device-width, initial-scale=1"}
                ])
server = app.server

app.config.suppress_callback_exceptions = True