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Mon Feb 17 19:18:24 CET 2014 · https://mail.python.org/pipermail/python-dev/2014-February/132428.html

17.02.14 14:11, M.-A. Lemburg написав(ла):
> Of course, it's easy to add a new type for this, but a lot of Python 2
> code relies on None behaving this way, esp. code that reads data from
> databases, since None is the Python mapping for SQL NULL.

At the same time a lot of Python 2 relies on the assumption that any two 
values are comparable. I suppose that I see a code that try to sort a 
heterogeneous list more often than a code which want to sort a list 
containing only numbers and Nones.

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[Python-Dev] python 3 niggle: None < 1 raises TypeError