title: NameError: name Timer is not defined
body: <p>I have a small python program written for python 2.7.3: </p>
  
  <pre><code>import time
  def fun():
      print('Hi')
  for i in range(3):
      Timer(i, fun).start()
  </code></pre>
  
  <p>When I run it, I get the error:</p>
  
  <p><code>NameError: name 'Timer' is not defined</code></p>
  
  <p>How can I find out which module supports this functionality?</p>