@IcToxi this looks great! Thanks so much for your contribution, in fact rather than a new app I'd suggest we use your app to replace dash-svm.

One thing to note though, we've more or less stopped recommending dash_canvas since most thing you can do there can also be accomplished with dcc.Graph - and dcc.Graph can do so much more. Per the dash canvas docs page:

Note: dash-canvas is a legacy package, the recommended way to annotate images is to use the drawing tools of plotly figures.

That said I'm not sure that the techniques described in https://dash.plotly.com/annotations are exactly what you'd want for this purpose... the super-cool point drawing feature you added would really be best handled not by drawing shapes, but by generic click events that cause a data point to be added to a trace. That in turn would be best done with "click anywhere" which is a feature we've been trying for some time to add to plotly.js but the PR to add it has stalled and needs some more work.

So maybe best to leave dash_canvas here, and we can update to dcc.Graph once we manage to finish up click anywhere. There might be a way to pretend we have this feature, by for example putting a heatmap or image on the graph and grabbing click events from the heatmap... if you're feeling really adventurous you could try that.

To your question about streambed - don't worry about it, that's a private Plotly repo, those instructions were meant for Plotly employees and don't apply to you. We're just thrilled that you're contributing here!

cc @danton267 who's starting a project to update many of the apps in this repo - keep an eye on this PR, and leave dash-svm off your list until this PR is merged 😄