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…

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

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

bershika March 30, 2024, 8:25pm 8

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']

LookupError when trying to use dash.ctx.triggered_id in a DjangoDash app

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Lookup Error When Using Context_Callback

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