擅长:python、mysql、java
<p>使用<a href="http://docs.python.org/2/library/itertools.html#itertools.islice" rel="nofollow">itertools.islice</a>:</p>
<pre><code>import itertools
import sys
with open('input.txt') as f:
sys.stdout.writelines(itertools.islice(f, 1, None, 2))
</code></pre>