构建一个基本的Python迭代器

class BasicIterator:
    def __init__(self, start, end):
        self.start = start
        self.end = end

    def __iter__(self):
        return self

    def __next__(self):
        if self.start >= self.end:
            raise StopIteration
        else:
            self.start += 1
            return self.start - 1

# 使用迭代器
iterator = BasicIterator(1, 5)
for number in iterator:
    print(number)