App.run_server() does not display my dash table

Dash Python
1

When i run the below:

app = dash.Dash(name)

app.layout = dash_table.DataTable(
    id='table',
    columns=[{"name": i, "id": i} for i in data.columns],
    data=data.to_dict('records'),
    
)

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

i then get a : 'running on https://127.0.0.1:8050/ and then when i click on it i get a “hmm… can’t reach this page” and an error code: INET_E_RESOURCE_NOT_FOUND

2 
app = dash.Dash(name)

should be

app = dash.Dash(__name__)
3

sorry i have done that and did mean that just editing wrong. still does not work.

4 
ssl_context='adhoc'

appears to be the culprit…not sure why…might have time later to dive into it but FYI in case you weren’t going down this path…

5

but when i remove this it still does not work

6

Using the latest (aka today’s most recent update) of Dash, the following works for me:

import dash
import dash_table
import pandas as pd

df = pd.read_csv('https://raw.githubusercontent.com/plotly/datasets/master/solar.csv')
app = dash.Dash(__name__)

app.layout = dash_table.DataTable(
    id='table',
    columns=[{"name": i, "id": i} for i in df.columns],
    data=df.to_dict('records'),

)

if __name__ == '__main__':
    app.run_server(
        debug=True,
        # ssl_context='adhoc'
    )

If I uncomment out the ssl_context line, it fails.

7

i tried that and i get:

Running on http://127.0.0.1:8050/
Debugger PIN: 798-371-704

  • Serving Flask app “main” (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

An exception has occurred, use %tb to see the full traceback.

SystemExit: 1

8

If you get that error w/o running the ssl_context argument, and your environment has the most recent packages, not sure why you are getting the exception. If you are running with ssl_context, is the pyOpenSSL package installed?

9

i already have pyopenSsl installed… not sure why i am getting the error, could it be a windows 10 thing?

10

possibly…i’m running the code I provided earlier on Linux w/o issues (using latest version of Chrome). Could be browser too (maybe??)

11

are you running this in jupyter? if so, set debug=False as reloading is incompatible with the jupyter kernel.

1 Like
12

running this in jupyter notebook yes- when i set to debug=False i click on my https/127.0.0.1/8050 and i get the error: Error loading layout