title: os.system complains about round brackets
body: <p>I am trying to include this line in a python script.</p>
  
  <pre><code>!#/bin/bash/env python
  
  import os
  
  os.system("paste &lt;(awk '!/^($|[:space:]*#)/{print $0}' file1) &lt;(awk '!/^($|[:space:]*#)/{print $0} file2) &gt; out_file")
  </code></pre>
  
  <p>The command is perfectly fine when run from bash directly. However, inside the script, I get:</p>
  
  <pre><code>sh: -c: line0: syntax error near unexpected token `('
  </code></pre>
  
  <p>The problem persists when using simply:</p>
  
  <pre><code>os.system("paste &lt;(cat file1) &gt; output_file")
  </code></pre>
  
  <p>Any ideas?</p>