title: How to run a command line script in Python
body: <p>If I have a command line like this:</p>
  
  <pre><code>abc -c config.json| xyz -c test.json
  </code></pre>
  
  <p>How can I run it in Python file? I mean we will don't type "<code>abc -c config.json| xyz -c test.json</code>" in the terminal.
  <code>xyz</code> and <code>abc</code> are applications that I have written.</p>
  
  <p>So, May I have a help? </p>