you, and the community, have done a marvelous thing with Dash. To enable people like me to use the web with no real effort is wonderful. Thank you all so much, especially you for taking the time to herd this initiative.
I have looked at the URL’s chapter as you recommended and it’s not what I would like to do. I understand how it would work but it’s not for me. I am “using” python ( not very well I might add) and wonder IF another solution might be to have two Dash apps running ( 8050 and 8051) . In the first app I show the dataframe and a range of rows are selected. This selection triggers some charting in the first app ( say plot financial symbols ( y axis) shared x ( time)) which creates an lineplot which multiple symbols show up. NOW the user spots a feature in the behavior of the price that needs more analysis ( say the price change is different in GM but NOT in F ) so the user clicks on the two relevant points on the lineplot ( GM and F) which triggers write to a feather datastructure. The 2nd Dash app ( on 8051) reads the change in the feather datastructure and plots what it has been told to do. I don’t want to get into the whole ipm ( inter process messaging) and queues thing if I can do the whole thing with an in memory data structure.