title: ZeroRPC: How to expose a module
body: <p>I'm new with ZeroRPC, </p>
  
  <p>I want to expose a class and a module,
  so I actually have 2 questions:
  1. What is the best way to expose a module?
      I tried something like:</p>
  
  <pre><code>import zerorpc
  
  server_obj = __import__("os")
  s = zerorpc.Server(server_obj)
  s.bind("tcp://0.0.0.0:4242")
  s.run()
  </code></pre>
  
  <ol>
  <li>Now, If i want to expose HelloRPC() class as well, how do I do it?</li>
  </ol>
  
  <p>Thanks</p>