It seems that dropdown menus are used exclusively as inputs to other dash objects. Or at least this is the case in the examples. In the interactive section of the “getting started” guide, you get to select a country from the dropdown menu, and then the graph updates based on the country you’ve selec…

Thanks @raghunath ! Note that a similar example was posted in the user guide: https://plot.ly/dash/getting-started-part-2 , code copied below: # -*- coding: utf-8 -*- import dash from dash.dependencies import Input, Output import dash_core_components as dcc import dash_html_components as html app =…

This should work. import dash import dash_core_components as dcc import dash_html_components as html app = dash.Dash() fnameDict = {'chriddy': ['opt1_c', 'opt2_c', 'opt3_c'], 'jackp': ['opt1_j', 'opt2_j']} names = list(fnameDict.keys()) nestedOptions = fnameDict[names[0]] app.layout = html.Div(…

Works! Now I see what I did wrong too!

[image] raghunath: html.Hr(), html.Div(id=‘display-selected-values’) There are 4 dropdown lists in my code. Is there anyone who can tell me why 3rd dropdown list will be affected by 1st one? I mean if I set value of 3rd one to yyy, it will change to xxx automatically if I choose any value in…

@chriddyp Can I update “options” of a dropdown dynamically using uploaded csv from “Upload” component

I am also having same requirements, please anyone can help out possibilities.

Yes. In the case you would create a callback with the Upload component as the input and the DropDown component as the output; the body of the callback should parse the .csv file and return the desired list of options for the DropDown menu.

Yes. It is working with the way you suggested. Thanks.

Please anyone can help: When dropdown value which is dynamically updated is used for filtering data from column of uploaded file’s dataframe thenit is providing null filtered values which was supposed to be used for plotting graph.

Is it possible to update the dropdown menu dynamically, without defining a corresponding dictionary before that outlines the possible combinations?

yes, see the “dynamic options” example in the drop down documentation: https://dash.plot.ly/dash-core-components/dropdown

Updating a dropdown menu's contents dynamically

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Updating a dropdown menu's contents dynamically

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