[Python-Dev] RFC: PEP 509: Add a private version to dict (original) (raw)

Yury Selivanov yselivanov.ml at gmail.com
Thu Apr 14 20:06:25 EDT 2016

On 2016-04-14 4:42 PM, Armin Rigo wrote:

Hi Victor,

On 14 April 2016 at 17:19, Victor Stinner <victor.stinner at gmail.com> wrote: Each time a dictionary is created, the global version is incremented and the dictionary version is initialized to the global version. A detail, but why not set the version tag of new empty dictionaries to zero, always? Same after a clear(). This would satisfy the condition: equality of the version tag is supposed to mean "the dictionary content is precisely the same".

So

{}.version_tag == {}.version_tag == 0 {'a':1}.version_tag != {'a':1}.version_tag

right?

For my patches I need globally unique version tags (making an exception for empty dicts is OK).

Yury

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