title: Raising exception from within except clause
body: <p>I'm wondering if we can do something like the following:<br>
  We catch socket error and if the message is different than some value,<br>
   raise the exception forward to be caught on the next general except clause below?  </p>
  
  <pre><code>try:
      some logic to connect to a server..   
  
  except socket.error as se:
      if se.messsage != '123':
         raise Exception(se.message)
  except exception as ex:
      log.error('write something')
  </code></pre>