NoneType and new instances
tjreedy at udel.edu
Sat Jul 30 15:35:58 CEST 2011
Ethan's proposal was accepted on python-ideas. In Python 3.3, the
classes for the singletons None, Ellipsis, and NotImplemented will be
callables that return the singleton.
It turns out that the reason an exception is now raised is that there
currently is no .__new__ method, so an exception is raised by default.
.__new__ methods returning the singleton have been added.
Terry Jan Reedy
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