How to use a python package - shouldn't i be able to access anything listed in __all__?

I'm trying to use the pyupnp package (http://code.google.com/p/pyupnp/)

I've built and installed it and in my code I have:

import pyupnp
b = pyupnp.UpnpBase()
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But I get this error: AttributeError: 'module' object has no attribute 'UpnpBase'

Now I had a look in the code for the package, and it has the following:

__all__ = [
  'UpnpNamespace',
  'UpnpDevice',
  'UpnpBase',
  ...

I thought that I would be able to access anything in the __all__ list? What am I doing wrong?

Thanks so much

Looking at this package, you should import pyupnp.upnp, not pyupnp. The contents of __all__ are irrelevant here.