Issues switching from .callback to .long_callback

Dash Python
5

welcome to the community @nbolohan and thanks for your question.

@jlfsjunior is correct. The Input should come before the State in the callback decorator. Such as:

@app.callback(
    Output('my-output', 'children'),
    Input('run simulation button', 'n_clicks'),
    State('table checklist','value'),
    prevent_initial_call=True
    )
def test(n_clicks, tables_to_compute):

Try that and let us know if you get an error.

Also, did you see the Dash 2.6 announcement post. We talk about a new version of long_callback called background callback.
The explanation in the post and in the docs might make what you’re trying to do a little easier.

1 Like