[Python-Dev] a new type for sys.implementation (original) (raw)

Mark Shannon mark at hotpy.org
Fri Jun 1 13:49:16 CEST 2012

Nick Coghlan wrote:

On Fri, Jun 1, 2012 at 7:16 PM, Maciej Fijalkowski <fijall at gmail.com> wrote:

sys.implementation could be added by site or some other startup file.

Yes, why not do that instead of a new thing in C? I don't care about PyPy actually (since we kind of have to implement sys.implementation in python/RPython anyway, since it'll be different) The idea is that sys.implementation is the way some interpreter internal details are exposed to the Python layer, thus it needs to handled in the implementation language, and explicitly not in Python (if it's in Python, then the implementation has to come up with some other API for accessing those internals from Python code, thus missing a large part of the point of the exercise).

Why?

What is wrong with something like the following (for CPython)?

class SysImplemention: "Define repr(), etc here " ...

sys.implementation = SysImplemention() sys.implementation.name = 'cpython' sys.implementation.version = (3, 3, 0, 'alpha', 4) sys.implementation.hexversion = 0x30300a4 sys.implementation.cache_tag = 'cpython-33'

Also, should the build/machine info be removed from sys.version and moved it to sys.implementation?

Cheers, Mark.

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