How do I use iterators in Python?

How do I use iterators in Python?

In Python, iterators are objects that allow you to traverse through a collection, like lists or tuples. You can create an iterator using the iter() function.

Can you give me an example of creating an iterator?

Sure! Here's a simple example:

my_list = [1, 2, 3]
my_iterator = iter(my_list)
print(next(my_iterator))  # Output: 1
print(next(my_iterator))  # Output: 2

What if I want to loop through all items using an iterator?

You can use a for loop to iterate through all items:

for item in my_list:
    print(item)

Are there built-in functions to work with iterators?

Yes! Functions like next(), iter(), and len() can be used with iterators. Additionally, the itertools module provides many useful iterator building blocks.