擅长:python、mysql、java
<p>我想你的意思是“再加上18个”;)</p>
<p>不管怎样,既然你用“python”来标记你的问题</p>
<pre><code>import re
s = "1466352405.455975 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 46) 192.168.52.53.32769 > 192.168.52.54.9600: UDP, length 18"
re.findall("length (\d+)",s)
</code></pre>