title: How to get a list of built-in modules in python?
body: <p>I would like to get a list of names of built-in modules in python such that I can test the popularity of function's naming conventions (underline, CamelCase or mixedCase).</p>
  
  <p>I know there is a <a href="https://docs.python.org/2/py-modindex.html" rel="noreferrer">Global Module Index</a> but I am wondering if there is a list of strings, which is easier to use :)</p>
  
  <p><strong>Update:</strong></p>
  
  <pre><code>len(dir(__builtins__)) = 145  
  len(stdlib_list("2.7")) = 430  
  help('modules') = 508 # counting manually the output
  </code></pre>