Python OOP User defined iterator ( how to use __iter__ and __next__ )

iterNext.py

class EvenNum:
    def __init__(self, size) -> None:
        self.size = size
        print(self, end=" : ")

    def __iter__(self):
        self.count = 0
        return self

    def __next__(self):
        self.count += 1
        if self.count > self.size:
            raise StopIteration
        return 2 * self.count


test = EvenNum(5)
even = iter(test)

print(next(even), end=" ")
print(next(even), end=" ")
print(next(even), end=" ")
print(next(even), end=" ")
print(next(even), end=" ")
print(next(even), end=" ")