title: Unable to tally help file with source (example: os module)
body: <p>I am learning how to read python docs and less reliant on the internet examples. Not easy, but I will try.</p>
  
  <p>In python cli, i </p>
  
  <blockquote>
    <p>import os</p>
  </blockquote>
  
  <p>When I <code>help(os)</code>, the following output was returned</p>
  
  <blockquote>
  <pre><code>CLASSES
  builtins.Exception(builtins.BaseException)
  builtins.OSError
  builtins.object
      nt.DirEntry
  builtins.tuple(builtins.object)
      nt.times_result
      nt.uname_result
      stat_result
      statvfs_result
      terminal_size
  
  class DirEntry(builtins.object)
   |  Methods defined here:
  </code></pre>
  </blockquote>
  
  <p>I cannot find the <code>class DirEntry</code> in the os.py source file. Can someone enlighten me why <code>help(os)</code> returns with DirEntry</p>