title: How to get help on methods in Python?
body: <p>whenever I use <code>help()</code> on a method I get a weird looking output. 
  For example, <code>help(obj.readline)</code> gives me the following output:</p>
  
  <pre><code>Help on built-in function readline:
  
  readline(...)
  </code></pre>
  
  <p>That's all i get. I don't know how to interpret it.Why there is no description about the method? Can somebody please explain to me what's going on?</p>