What are generators and iterators in Python?

What are generators and iterators in Python?

Generators are a type of iterable, like lists or tuples, but they generate values on the fly and use less memory.

Can you give me an example of a generator?

Sure! Here's a simple generator that yields squares of numbers:

def square_generator(n):
    for i in range(n):
        yield i * i

How do iterators differ from generators?

Iterators are objects that implement the iterator protocol, which consists of the __iter__() and __next__() methods. Generators are a simpler way to create iterators.

Can you show me an example of an iterator?

Absolutely! Here's a basic iterator class:

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:
            result = self.current
            self.current += 1
            return result
        else:
            raise StopIteration