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

MRAB python at mrabarnett.plus.com
Thu Apr 14 20:11:16 EDT 2016

On 2016-04-14 21:42, 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". If you did that, wouldn't it then be possible to replace an empty dict with another empty dict with you noticing? Would that matter?

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