On 2/17/2014 1:18 PM, Serhiy Storchaka wrote:
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.
That assumption was very intentionally broken and abandoned by Guido
when complex numbers were added over a decade ago. It was further
abandoned, intentionally, when datetimes were added. I think it was
decided then to finish the job in 3.0.
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.
--
Terry Jan Reedy
_______________________________________________
Python-Dev mailing list
Python-Dev@python.org
https://mail.python.org/mailman/listinfo/python-dev
Unsubscribe:
https://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
