What are iterators and generators in Python?

What are iterators and generators in Python?

Iterators are objects that allow you to traverse through a collection, while generators are a type of iterator created using functions.

Can you give me an example of a generator?

Sure! Here's a simple generator that yields numbers from 0 to n:

def count_up_to(n):
    count = 0
    while count < n:
        yield count
        count += 1

How do iterators differ from lists?

Iterators do not store their contents in memory; they generate items on the fly, while lists store all items in memory.

When should I use a generator instead of a list?

Use generators when dealing with large datasets or when you want to save memory, as they yield items one at a time.