What are iterator design patterns in Python?

What are iterator design patterns in Python?

Iterator design patterns in Python provide a way to access elements of a collection sequentially without exposing its underlying representation.

Can you give me an example of an iterator in Python?

Sure! Here's a simple example:

class MyIterator:
    def __init__(self, limit):
        self.limit = limit
        self.current = 0

    def __iter__(self):
        return self

    def __next__(self):
        if self.current < self.limit:
            self.current += 1
            return self.current - 1
        else:
            raise StopIteration

for number in MyIterator(5):
    print(number)

What are the benefits of using iterators?

Iterators provide a consistent way to traverse collections, reduce memory usage, and allow for lazy evaluation, which can improve performance.

Are there built-in iterators in Python?

Yes, Python has built-in iterators like list, tuple, dict, and set, which can be iterated over using a for loop.