python – 如何检查迭代器是否实际上是迭代器容器？

class DummyIterator:
    def __init__(self,max_value):
        self.max_value = max_value

    def __iter__(self):
        for i in range(self.max_value):
            yield i

def regular_dummy_iterator(max_value):
    for i in range(max_value):
        yield i

这允许我多次迭代该值,以便我可以实现这样的事情：

def normalise(data):
    total = sum(i for i in data)
    for val in data:
        yield val / total

# this works when I call next()
normalise(DummyIterator(100))

# this doesn't work when I call next()
normalise(regular_dummy_iterator(100))

如何检查normalize函数,我正在传递一个迭代器容器而不是一个普通的生成器？