What is the memory usage of iterators in programming?

What is the memory usage of iterators in programming?

Iterators typically use less memory than lists because they generate items on-the-fly instead of storing them all in memory.

Can you explain how that works in Python?

In Python, iterators implement the __iter__() and __next__() methods, allowing them to yield items one at a time.

Are there any downsides to using iterators?

Yes, one downside is that once an iterator is exhausted, it cannot be reused unless you recreate it.

How do generators relate to iterators?

Generators are a type of iterator that use the yield keyword to produce values, making them easier to implement.