擅长:python、mysql、java
<p>即使我搞不清楚是怎么回事,这里有一句漂亮的台词:</p>
<pre><code>infile = open("test")
outfile = open("out", "w")
outfile.writelines(s if not i%2 else s.replace("\n", "\t") for i, s in enumerate(infile))
</code></pre>
<p>编辑:<a href="https://stackoverflow.com/a/14966220/472416">John Clements's answer</a>更好。你知道吗</p>