擅长:python、mysql、java
<p>必须实现<code>__next__</code>方法,如下所示。你知道吗</p>
<pre><code> class ReverseIter:
"""Class whose instances iterate the initial iterable in reverse order"""
def __init__(self, iterable):
self.iterable = iterable
def __iter__(self):
last = len(self.iterable) - 1
while last >= 0:
yield self.iterable[last]
last -= 1
</code></pre>