title: Need to use a variable in an os.system command in python
body: <p>I am new to python and I need to use a variable in the <code>os.system</code> command, here's my code so far</p>
  
  <pre><code>import os , sys
  s = raw_input('test&gt;')
  </code></pre>
  
  <p>then i want to use the varable <code>s</code> in an <code>os.system</code> command so I was thinking something like <code>os.system("shutdown -s -t 10 -c" 's')</code></p>
  
  <p>I don't want answers for that specific command I just want to know in general but if you are going to use an example use shutdown</p>