Update custom widgets example

[rossant]

May need to tweak a few examples with custom widgets in the notebook to make them work with IPython 2.x (see this issue in IPython).

[rossant]

Apparently, to work with IPython 2.x, widget.DOMWidgetView needs to be replaced by IPython.DOMWidgetView, and manager.WidgetManager needs to be replaced by IPython.WidgetManager.

[YouGovGit]

HI, I'm not having any luck getting this to run (using the code I downloaded from the book reference). I'm getting a wrappedError. I think it has something to do with the issue you mention here as this problem sees similar https://gitter.im/ipython/ipython/help/archives/2015/06/02

[YouGovGit]

I think something may have got lost in the update of the code in the book and download. I know you mention it above, but just to be clear, the line:
WidgetManager.register_widget_view should read:
IPython.WidgetManager.register_widget_view

Otherwise all good. (your book is a revelation so far - well worth the money)

[rossant]

Thanks for the tip! The book's code deserves an update with Jupyter 4.0, especially the widget part. I'm currently busy with the minibook's new edition, so maybe afterwards...!