[Python-Dev] RFC: PEP 509: Add a private version to dict

[Stefan Behnel]

Victor Stinner schrieb am 15.04.2016 um 10:20:
> Le vendredi 15 avril 2016, Stefan Behnel a écrit :
> 
>> How can that be achieved? If the tag is just a sequentially growing number,
>> creating two dicts and applying one operation to the first one should give
>> both the same version tag, right?
>>
> 
> Armin didn't propose to get ride of the global version.
> 
> a = dict() # version = 0
> b = dict() # version = 0
> a['key'] = 'value' # version = 300
> b['key'] = 'value' # version = 301

Ah, sorry, should have read the PEP more closely. It's *always* the global
version that gets incremented. Then yes, that's a safe point of distinction
for dicts and their status.

Stefan