Vertical line on hover in all subplots

Dash Python
3

What is the error you are getting, or are you getting an error? Your first function has four Inputs but only three function parameters.

Maybe you could use State('oi_graphs','figure) as an input to display_hover_data.
When the hoverData is updated:

  • check if the y data for the last thing in the figure’s data list has identical items (i.e. y[0]==y[-1], i.e. there’s already a vertical line)
  • if it does, just pop it off the end of the list
  • add a go.Scatter(marker=dict(...,mode='line') to the list of data at the hoverData's x coordinate with x and y vertical like in How do i plot vertical line over a timeseries curve in plotly?
  • return the new figure with the new vertical line

Using subplots make this harder, but I think the general idea would work, and it should be relatively fast.