当迭代器被调用时，如何删除输出'None‘？

class MyIterator:
    def __init__(self, data):
        self.data = data
        self.index = 0

    def __iter__(self):
        return self

    def __next__(self):
        if self.index < len(self.data):
            value = self.data[self.index]
            self.index += 1
            if value is None:
                return self.__next__()  # 跳过输出'None'
            else:
                return value
        else:
            raise StopIteration

# 示例用法
my_list = [1, 2, None, 4, None, 6]
my_iterator = MyIterator(my_list)

for item in my_iterator:
    print(item)