Dash_table does not return anything

Dash Python
1

Hello All, I am back to Dash after months not using it. Get stuck with very simple code:


app.layout = html.Div(children=[html.H1('Most similar products that could be suggested to a given customer'),
                      html.Div(dash_table.DataTable(df_most_similar.to_dict('records')))])


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

I am using G. Colab.

This code does not return anything when executing cell...

Would you have an explanation ?

Thank you for your feedback
2

I note that code works
```app.run_server(mode=‘external’, port = 8060, debug=True)````
But if I re-run the cell it returns an error !

I’ve got additional information once executed the code:

Try `serve_kernel_port_as_iframe` instead. 
http://127.0.0.1:8060/````

Meaning of this ?

Is there some one who can explain what is behind there ? And how to avoid to get error message when re-run the code ?

Many thanks for your help !
3

Hi @Olivier_fr

We need more context to help you. And giving more context / simplifying your code will also help you debugging.

  1. What df_most_similar looks like ? Please provide a dummy sample so that we can run the app
  2. Do you have any callback updating the content / the datatable ? If yes, remove whatever unnecessary callback of your app until you identify one posing problem.
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