title: Python2.7 Exception "The "freeze_support()" line can be omitted if the program"
body: <pre><code>import Queue
  from multiprocessing.managers import BaseManager
  
  BaseManager.register('get_queue', callable=lambda:  Queue.Queue())
  
  manager = BaseManager(address=('', 5000), authkey='abc')
  manager.start()
  manager.shutdown()
  </code></pre>
  
  <p>This code will throw a exception </p>
  
  <pre><code>RuntimeError: 
          Attempt to start a new process before the current process
          has finished its bootstrapping phase.
  
          This probably means that you are on Windows and you have
          forgotten to use the proper idiom in the main module:
  
              if __name__ == '__main__':
                  freeze_support()
                  ...
  
          The "freeze_support()" line can be omitted if the program
          is not going to be frozen to produce a Windows executable.
  </code></pre>
  
  <p>but after I add <code>if __name__ == '__main__': freeze_support()</code>
  It will throw anther exception, how to fix it?
  My os is <code>window7</code></p>