Having problem with updating the figure from the dropdown selected fields

Dash Python
2

It looks like df is not defined yet, but the callback plotly_maker is still being fired at startup.

What you can do is put a try except block that checks for a NameError and in the except block you can raise an exception. In this case, the preference would be raise dash.exceptions.PreventUpdate()

Reference: Handle first callback on App start

Hope that fixes this!

1 Like