擅长:python、mysql、java
<p>我相信你想要的是一个<code>take</code>。来自<a href="http://docs.python.org/library/itertools.html" rel="nofollow noreferrer">the itertools documentation</a>:</p>
<pre><code>def take(n, iterable):
"Return first n items of the iterable as a list"
return list(islice(iterable, n))
</code></pre>