Add a python way to schedule purely js animations

Add a python construct that scripts running animations that are purely done in javascript. This way static examples can be built that have animations.

maybe something like this

N = 80
x = np.linspace(0, 4*np.pi, N)

y = np.sin(x)
y2 = np.tan(x)
y3 = np.cos(x)

y_possibilities = [y,y2,y3]

l = line(x,y, color="#0000FF", tools="pan,zoom,resize")

animate(animate.select(y_posibilities), delay="3s", line)

that is a very very rough syntax. But something like that should produce a bokeh object that every 3 seconds switches out the y data range to one of the other possibilities.

[Lnk2past]

Any chance I could help support this? Has there been any progress on this feature? I am currently doing something hackish with panel/hvplot to animate some basic transitions, but would love to have this in bokeh out of the box. I will request an invite to the dev slack when I am home later if that is a more appropriate place to discuss.

[pzwang]

After a chat with Bryan, we have come to some resolution about how to handle events and model updates while the plot is animating. Namely, we should add some kind of deep “event system disable” that flags that the entire plot is “transitioning”, so while the JS-side model may be updating with values, it does not trigger callbacks or other “data model” changes until the final state is reached. Any new data events coming in are queued up. User interactions (mouse, kbd, etc.) are ignored while transitioning.