Call backs does not display trace

[sangsang]

I am trying to update the graph using callback. For some reason nothing seems to appear in the figure.
I have attached the code and the sample screenshot.

[adamschroeder]

Try printing

df[value]

inside your “changegraph()” function, before you return the data. See what that gives you.

[sangsang]

Thank you for getting back. When I print df[value] I get the series I want to plot. But, the plot does not appear in the app.

[sangsang]

Returned the figure this way, and the callback seems to work.
Pls find the figure attached. But what difference does it make anyway