[Python-Dev] Python 3.6 dict becomes compact and gets a private version; and keywords become ordered

[Tres Seaver]

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On 09/13/2016 02:11 PM, Sven R. Kunze wrote:

> On 13.09.2016 19:59, MRAB wrote:
>> The recommended way of dealing with features across different
>> versions of Python is to check for them and see if they raise
>> NameError or whatever, but I wonder if there would be any benefit to
>> recording such things somewhere, e.g. sys.features['ordered_args']
>> returns True if arguments are passed in an ordered dict.
> 
> Just to check: do people really that often change between Python 
> implementations?
> 
> My personal experience with this kind of compatibility is that it is 
> rarely needed for large and complex programs. That is due to
> deployment and testing issues (at least in our environment as we run
> multiple Python services on a multitude of servers).

*Lots* of library authors have to straddle Python versions: consumers of
those libraries only get to pick and choose when their code is at the
"leaf" of the dependency tree (the application).


Tres.
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Tres Seaver          +1 540-429-0999          tseaver at palladion.com
Palladion Software   "Excellence by Design"    http://palladion.com
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