title: How to prevent "Address already in use" error (errno 48) for Python Django Project
body: <p>I want to know how to <em>prevent</em> this error from always happening to me, <em>not</em> how to kill it when it does happen. </p>
  
  <p>When I do "python manage.py runserver_plus", I usually get the error "Address already in use" when I run this command again after using the shell_plus.  I am often switching back and forth from "python manage.py shell_plus" and "runserver_plus". Am I quitting my server correctly? I quit the server via "ctrl + C" and I quit the shell using quit().  </p>
  
  <p>Thank you very much!   </p>