[Python-Dev] Deprecating builtin id (and moving it to sys())

[Samuele Pedroni]

Jeremy Hylton wrote:
> I'd like to see the builtin id() removed so that I can use it as a
> local variable name without clashing with the builtin name.  I
> certainly use the id() function, but not as often as I have a local
> variable I'd like to name id.  The sys module seems like a natural
> place to put id(), since it is exposing something about the
> implementation of Python rather than something about the language; the
> language offers the is operator to check ids.
> 

it is worth to remember that id() functionality is not cheap for Python
impls using moving GCs. Identity mappings would be less taxing.

> Jeremy
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