Google Colaboratory上のWebアプリを外部公開する方法

! pip install dash
! pip install dash-html-components
! pip install dash-core-components
! pip install dash-table

! wget https://bin.equinox.io/c/4VmDzA7iaHb/ngrok-stable-linux-amd64.zip
! unzip ngrok-stable-linux-amd64.zip

! ./ngrok authtoken [確認したAuthtokenを入力する]

get_ipython().system_raw(‘./ngrok http 8050 -host-header=“localhost:8050” -auth=“任意のユーザ名:任意のパスワード" -region=jp &’)

! curl -s http://localhost:4040/api/tunnels | python3 -c "import sys, json; print(json.load(sys.stdin)['tunnels'][0]['public_url’])”

'https://xxxx-xx-xxx-xx-xx.jp.ngrok.io'

%%writefile my_app1.py
import dash
import dash_core_components as dcc
import dash_html_components as html

external_stylesheets = ['https://codepen.io/chriddyp/pen/bWLwgP.css']

app = dash.Dash(__name__)#, external_stylesheets=external_stylesheets)

app.layout = html.Div(children=[
    html.H1(children='Hello Dash'),

    html.Div(children='''
        Dash: A web application framework for Python.
    '''),
])

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

! python my_app1.py
my_app1.py:2: UserWarning: 
The dash_core_components package is deprecated. Please replace
`import dash_core_components as dcc` with `from dash import dcc`
  import dash_core_components as dcc
my_app1.py:3: UserWarning: 
The dash_html_components package is deprecated. Please replace
`import dash_html_components as html` with `from dash import html`
  import dash_html_components as html
Dash is running on http://127.0.0.1:8050/

 * Serving Flask app "my_app1" (lazy loading)
 * Environment: production
   WARNING: This is a development server. Do not use it in a production deployment.
   Use a production WSGI server instead.
 * Debug mode: on
/content/my_app1.py:2: UserWarning: 
The dash_core_components package is deprecated. Please replace
`import dash_core_components as dcc` with `from dash import dcc`
  import dash_core_components as dcc
/content/my_app1.py:3: UserWarning: 
The dash_html_components package is deprecated. Please replace
`import dash_html_components as html` with `from dash import html`
  import dash_html_components as html