Almost all the example in the main repo are small focused scripts, it’s just easier to manage. Something could also be added to the bokeh-notebooks repo potentially. But the main thing would be to define and add the convenience function, so that the example script itself could short, be only 10-20 lines long.
I.e., would like to avoid repeating the situation with vector.py where 90% of the example is supporting code to generate streamlines, unrelated to Bokeh. (In fact maybe that code would be moved to a convenience function too)