title: how to install python-webkit and python-webkit-dev in ubuntu 18.04
body: <p>I was getting E: Package 'python-webkit' has no installation candidate</p>
  
  <pre><code>ubuntu@ip-172-31-43-50:~$ sudo apt install python-webkit 
  Reading package lists... Done
  Building dependency tree       
  Reading state information... Done
  Package python-webkit is not available, but is referred to by another package.
  This may mean that the package is missing, has been obsoleted, or
  is only available from another source
  
  E: Package 'python-webkit' has no installation candidate
  ubuntu@ip-172-31-43-50:~$ 
  </code></pre>