Play widget will stop programmatically, but won't start

[dsblank]

Using a Play() widget, I can stop the play with:

play._playing = False

But this doesn't start it:

play._playing = True

The Play button is highlighted, but it doesn't start playing.

[jasongrout]

Presumably a private _playing attribute is not part of the public api, so using it manually is undefined and at your own risk. However, it would be good to see if there is a way to pause playback from Python that is officially supported.