title: Python: How to execute an external program
body: <p>How do I execute a program from within my program without blocking until the executed program finishes?</p>
  
  <p>I have tried:</p>
  
  <pre><code>os.system()
  </code></pre>
  
  <p>But it stops my program till the executed program is stopped/closed. Is there a way to allow my program to keep running after the execution of the external program?</p>