[csw-maintainers] Python 2.7

Peter FELECAN pfelecan at opencsw.org
Thu Aug 1 17:25:34 CEST 2013

"Maciej (Matchek) Bliziński" <maciej at opencsw.org> writes:

> 2013/8/1 Peter FELECAN <pfelecan at opencsw.org>:
>>> I'm curious if anyone will object to my idea to drop the dependency on
>>> the interpreter.
>> I'm rather opposed to it as it transgress the fundamental property of
>> explicit dependency declaration.
> I understand that your objection is principled rather than pragmatic, right?

I would say a principled pragmatism :-)

>> This can also create havoc, especially
>> if a 2.7 module is tried on a 2.6 only installation.
> I don't know, what exactly do you have in mind? Can you give a concrete example?

If one of the 2.7 modules has code using a set literal, e.g. {'0,'1'}
instead of set('0','1') it will fail in 2.6

If one of the 2.6 modules has code using a set literal,
e.g. set('0','1') instead of {'0,'1'} it will work in 2.7

This is what we call ascendant compatibility, isn't it?

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