Iterable protocol and observable

[mpj]

@mbostock

You need to return a “generatorish” object rather than an iterable; specifically, Observable looks for the generator .next and generator .return functions to test whether a cell is a generator. Here’s a new notebook on custom generators and iterables:

Thank you, thats solves my problem!

Out of curiosity, why does it need to be generatorish and not just an iterator? What is the return method used for?