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[this came up as part of the Enum discussions. Full details in this thread: http://mail.python.org/pipermail/python-dev/2013-May/126076.html]
namedtuple currently uses this code to obtain the __module__ for the class it creates dynamically so that pickling works:
 result.__module__ = _sys._getframe(1).f_globals.get('__name__', '__main__')
This may not work correctly on all Python implementations, for example IronPython.
To support some way to pickle on all implementations, namedtuple should support a fully qualified name for the class: 
 Point = namedtuple('mymodule.Point', ['x', 'y'])
If the name is a qualified dotted name, it will be split and the first part becomes the __module__.