title: Traversing an ftp folder with python
body: <p>I need to write a python script that traverses a folder on a FTP server.</p>
  <h1>for file in ftpfolder:</h1>
  <pre><code>#get it
  #do something untoward with it
  </code></pre>
  <p>Snippets and non-wheel-reinvention advice welcome.</p>