title: Python - I'm trying to get the output of pwd and instead i get the exit status
body: <p>I'm trying to get the output of <code>pwd</code>:</p>
  
  <pre><code>#!python
  import os
  pwd = os.system("pwd")
  print (pwd)
  </code></pre>
  
  <p>it prints 0 which is the successful exit status instead the path.
  How can i get the path instead?</p>