title: Python DFS and BFS
body: <p>Here <a href="http://www.python.org/doc/essays/graphs/" rel="nofollow">http://www.python.org/doc/essays/graphs/</a> is DFS right ?</p>
  
  <p>I try to do something with 'siblings', but it does not work.
  Can anyone write BFS similar to code from this site.</p>