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

[Chris Angelico]

On Tue, Feb 18, 2014 at 1:30 AM, M.-A. Lemburg <mal at egenix.com> wrote:
>>
>> Also think of the implications of changing None at this point.  It would
>> allow us to write programs that work Python >= 3.5 and Python <= 2.7, but
>> fail mysteriously in all other versions in between.  What a mess that would
>> be...
>
> Yes, that's unfortunately true.

I don't know that that's in itself that much of a problem. (BTW, I
wouldn't call it "<= 2.7"; it'd be all 2.x, it's not like some of the
2.7.y versions aren't included.) There are already barriers to
supporting 2.7 and 3.1/3.2, like the u"asdf" notation for Unicode
literals. Making it easier to support 2.x and 3.x from the same
codebase is an improvement that has been done and will be done more.
It's not such a mysterious failure; it's just that you support Python
2.5+ and 3.4+ (or whatever the specific versions are).

ChrisA