How to Create an Iterable Class with __iter__ and __next__ in Python

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

    def __iter__(self):
        return self

    def __next__(self):
        if self.current >= self.limit:
            raise StopIteration
        result = self.current
        self.current += 2
        return result


class FibonacciSequence:
    def __init__(self, count):
        self.count = count
        self.index = 0
        self.a, self.b = 0, 1

    def __iter__(self):
        return self

    def __next__(self):
        if self.index >= self.count:
            raise StopIteration
        result = self.a
        self.a, self.b = self.b, self.a + self.b
        self.index += 1
        return result


if __name__ == "__main__":
    print("Even numbers up to 10:", list(EvenNumbers(10)))
    print("First 8 Fibonacci numbers:", list(FibonacciSequence(8)))