What are the memory usage differences between iterables and iterators?

What are the memory usage differences between iterables and iterators?

Iterables store all their elements in memory, while iterators generate elements on-the-fly, using less memory.

Can you give me an example of an iterable and an iterator?

Sure! A list is an iterable, while a generator function is an iterator.

How does this affect performance in large datasets?

Using iterators can significantly improve performance with large datasets since they don't require loading everything into memory.

Are there any downsides to using iterators?

Yes, iterators can only be traversed once, so if you need to access elements multiple times, you might need to convert them to a list.