- a generator is an iterator
- an iterator is an iterable
from collections.abc import Iterator, Iterable
from types import GeneratorType
print( issubclass(GeneratorType, Iterator) ) # True
print( issubclass(Iterator, Iterable) ) # True
- Genarators are a simpler way to create an iterable object than iterators, but iterators allow for more complex iterables.
- To create an iterator we need a class with two methods:
__iter__ and __next__, and a raise StopIteration.
- To create a generator we only need a single function with `yield .