[Python-3000] Python 3.0 Porting Strategies

[Barry Warsaw]

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On Mar 27, 2008, at 2:09 AM, Martin v. Löwis wrote:
>> For new code, however, there is an alternative strategy that doesn't
>> involve 2to3 at all, which is to write code in the "greatest common
>> subset" of 2.6 and 3.0.
>>
>> As Lennart Regbro pointed out earlier, this common subset is actually
>> quite large (larger than Guido originally intended, I think), and you
>> can write some fairly substantial applications in it.
>
> I think it's worth noting that the subset is large only for 3.0 and  
> 2.6.
> If you need to support 2.5 as well, the subset is significantly  
> smaller;
> and if you also want to support 2.4, the subset is again even smaller.

And borrowing Guido's time machine (always a risky prospect), the  
subset should be larger still for 3.1 and 2.7.

- -Barry

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