What are the differences in memory usage between iterators and iterables?

What are the differences in memory usage between iterators and iterables?

Iterators use less memory because they generate items on-the-fly, while iterables store all items in memory.

Can you give an example of when to use an iterator?

Sure! Use an iterator when processing large datasets, like reading a file line by line, to save memory.

Are there any downsides to using iterators?

Yes, iterators can only be traversed once. If you need to access elements multiple times, iterables are better.

How do I convert an iterable to an iterator?

You can convert an iterable to an iterator using the iter() function in Python.

What about performance differences between the two?

Iterators can be faster for large datasets since they don't require loading all items into memory at once.