[Python-Dev] RFC: PEP 509: Add a private version to dict
brett at python.org
Thu Apr 14 21:42:39 EDT 2016
On Thu, Apr 14, 2016, 17:14 MRAB <python at mrabarnett.plus.com> wrote:
> 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>
> >> 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?
If you meant to say "without" then yes.
Would that matter?
Nope because this is about versioining content, so having identical/empty
content compare equal is fine.
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