Singleton python generator? Or, pickle a python generator?

Question

I am using the following code, with nested generators, to iterate over a text document and return training examples using get_train_minibatch(). I would like to

Answer 1

1. Convert the generator to a class in which the generator code is the __iter__ method
2. Add __getstate__ and __setstate__ methods to the class, to handling pickling. Remember that you can’t pickle file objects. So __setstate__ will have to re-open files, as necessary.

I describe this method in more depth, with sample code, here.