Suppress callback exceptions True not working dash

Dash Python
1

Hi Here,
i’m using value from an id from a callback (well not in the layout)
i recieved the errror that i have to set suppress_callback_exceptions=True to be able to do that.
Here an example:

app = dash.Dash(__name__,suppress_callback_exceptions=True,external_stylesheets=['./assets/stylesheet.css'])
app.layout[...

@app.callback(Output('list_ids', 'children'),
    [Input('table', 'derived_virtual_data')],)
def get_list_ids(rows):
    df = pd.Dataframe(rows)
    full_list = dcc.Dropdown(id='all_ids', options=[{'label': name, 'value':name} for name in df['name'].drop_duplicates().to_list(), value=None)
return full_list

so i make my dropdown
now i tried:

@app.callback(

    Output('pcontainer', 'children'),

    Input('all_ids', 'value'),

    prevent_initial_call=True

)

def show_name(name)
    if name is not None:
         returun html.Div('ids= {}'.format(name))

it already works, so when i choose a name (or names) i can see them in the ouput… But however i’m still seeing this error:
If you are assigning callbacks to components that are
generated by other callbacks (and therefore not in the
initial layout), you can suppress this exception by setting
suppress_callback_exceptions=True.
This ID was used in the callback(s) for Output(s):
plot_container.children

any suggestions?

2

i just had to (completly) close the link, interreupt the kernel und run aigin :slight_smile:

3

Hi,
you should use suppress_callback_exceptions and prevent_initial_call together,
like this:

app = Dash(__name__,suppress_callback_exceptions=True)
...
@app.callback(Output("img", "src"), Input("calendar", "date"), prevent_initial_call=True)

see more in dash document

4

It worked for me. Thank you so much for your help.