title: python 2.4.3 subprocess check_call
body: <p>I have apparently an old version of python, and when i try to use</p>
  
  <pre><code>subprocess.check_call(...)
  </code></pre>
  
  <p>an error is returned saying that the <code>check_call</code> doesn't exist.
  Is there an equivalent? By the way... i need to understand which line is invoked when i use <code>subprocess.call(...)</code></p>