title: Parsing Wikipedia recursively and fetch text from included links
body: <p>Because I hate clicking forth and back reading through Wikipedia articles I am trying to build a tool to create "expanded Wikipedia articles" according to the following algorithm:</p>
  
  <ul>
  <li>Create two variables: <code>Depth</code> and <code>Length</code>.</li>
  <li>Set a Wikipedia article as a seed page</li>
  <li>Parse through this article: Whenever there is a link to another article fetch the first <code>Length</code> sentences and include it in the original article (e.g. in brackets or otherwise highlighted).</li>
  <li>Do this recursively up to a certain <code>Depth</code>, i.e. not deeper than two levels.</li>
  </ul>
  
  <p>The result would be an article that could be read in one go without always clicking to and fro...</p>
  
  <p>How would you build such a mechanism in Python? Which libraries should be used (are there any for such tasks)? Are there any helpful tutorials?</p>