I’m trying to use context_callback in an if statement in a callback: @app.callback( Output("EventbyType", "figure"), Input("EventbyTypeDropdown", "value"), Input('refresh-graph', 'n_clicks'), State('datepicker-start', 'value'), State('datepicker-end', 'value'), ) def generate_Ev…

Found the issue. I had django_plotly_dash imported at the top, even though I wasn’t using it at all. That was causing the error every time. It’s strange though, the django_plotly_dash docs mention callback_context being part of kwargs.

Try removing the single quotes around the EventbyTypeDropdown in the function. @app.callback( Output("EventbyType", "figure"), Input("EventbyTypeDropdown", "value"), Input('refresh-graph', 'n_clicks'), State('datepicker-start', 'value'), State('datepicker-end', 'value'), ) def g…

I removed the quotes, but I still get the error.

Hi @starsidechimp , an example: import dash from dash import html, Input, Output, ctx app = dash.Dash(__name__) app.layout = html.Div( [ html.Button( 'b1', id='b1' ), html.Button( 'b2', id='b2' ), html.Div…

[image] starsidechimp: I don’t see any examples of this on the community examples page, so any help would be greatly appreciated. Hi @starsidechimp Glad you figured out the issue :confetti_ball: Thanks @AIMPED for providing a nice minimal example for callback_context. For anyone looking f…

Check your Dash version and make sure you are getting callback_context (or ctx) name from the correct package. This what works for dash==2.9.3: trigger_id = dash.callback_context.triggered[0]['prop_id']

Same error. It’s given when initialize Dash. I’ve extend the dash class. Probebly the problem occour only when i create it form another thread, really confused about it someone can help?

Lookup Error When Using Context_Callback

Dash Python

jgm March 7, 2023, 4:21pm 7

I am seeing the same error, as described here .The error is occurring in line 275 of pages.py

Topic		Replies	Views
LookupError when trying to use dash.ctx.triggered_id in a DjangoDash app Dash Python	0	55	May 20, 2025
AttributeError: 'Dash' object has no attribute 'callback_context' Dash Python	0	839	February 7, 2020
Don't understand callback context documentation Dash Python	3	909	February 3, 2023
Background callback doesn't allow usage of dash.callback_context Dash Python bug-reporter	7	1324	October 28, 2022
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Lookup Error When Using Context_Callback

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