What is the difference between iter() and next() in Python?

What is the difference between iter() and next() in Python?

In Python, iter() is a built-in function that returns an iterator object from an iterable, while next() retrieves the next item from that iterator.

Can you give me an example of how to use both functions?

Sure! Here's a simple example:

my_list = [1, 2, 3]
my_iter = iter(my_list)

print(next(my_iter))  # Output: 1
print(next(my_iter))  # Output: 2

What happens if I call next() on an iterator that has no more items?

If you call next() on an iterator that has no more items, it raises a StopIteration exception.

How can I handle that exception?

You can handle the StopIteration exception using a try-except block. Here's an example:

try:
    print(next(my_iter))
except StopIteration:
    print('No more items!')