擅长:python、mysql、java
<p>您可以简单地为其编制索引:</p>
<pre><code>"adkisnckindlikenskdihjgkiskdik"[::7]
# 'akeji' # gives you characters at positions 0, 7, 14, 21, 28
</code></pre>
<hr/>
<pre><code>[line[::7] for line in text.split(".")]
# ['akeji', 'akeji', 'akejiniik', '']
</code></pre>