title: execute a shell-script from Python subprocess
body: <p>I need to call a shellscript from python.
  The problem is that the shellscript will ask a couple of questions along the way until it is finished.</p>
  
  <p>I can't find a way to do so using <code>subprocess</code>! (using <code>pexpect</code> seems a bit over-kill since I only need to start it and send a couple of YES to it)</p>
  
  <p><strong>PLEASE don't suggest ways that requires modification to the shell-script!</strong></p>