擅长:python、mysql、java
<p>使用字符串插值,如<a href="http://docs.python.org/2/library/stdtypes.html#str.format">^{<cd1>}</a>:</p>
<pre><code>subprocess.Popen("ls -l | grep {}".format(grepstring), ...)
</code></pre>
<p>但是请注意<a href="http://docs.python.org/2/library/subprocess.html#frequently-used-arguments">warnings on the ^{<cd2>} documentation</a>在shell中执行不受信任的命令。在</p>