Hello. We are sorry but we cannot help you. This mailing list is to work on developing Python (adding new features to Python itself and fixing bugs); if you're having problems learning, understanding or using Python, please find another forum. Probably python-list/comp.lang.python mailing list/news group is the best place; there are Python developers who participate in it; you may get a faster, and probably more complete, answer there. See http://www.python.org/community/ for other lists/news groups/fora. Thank you for understanding. On Mon, Jan 07, 2013 at 03:06:51PM +0100, Dima Tisnek wrote:

Hi, is it possible to access the values stored on the stack in Python stack machine from Python?

In short: it's possible but very much discouraged. Don't hack into python internals. Oleg. -- Oleg Broytman http://phdru.name/ phd@phdru.name Programmers don't die, they just GOSUB without RETURN.

On Mon, Jan 7, 2013 at 10:46 AM, Maciej Fijalkowski wrote:

On Mon, Jan 7, 2013 at 4:22 PM, Oleg Broytman wrote:

...

Hello.

We are sorry but we cannot help you. This mailing list is to work on developing Python (adding new features to Python itself and fixing bugs); if you're having problems learning, understanding or using Python, please find another forum. Probably python-list/comp.lang.python mailing list/news group is the best place; there are Python developers who participate in it; you may get a faster, and probably more complete, answer there. See http://www.python.org/community/ for other lists/news groups/fora. Thank you for understanding.

On Mon, Jan 07, 2013 at 03:06:51PM +0100, Dima Tisnek wrote:

...

Hi, is it possible to access the values stored on the stack in Python stack machine from Python?

In short: it's possible but very much discouraged. Don't hack into python internals.

Is it possible? I claim it's not (from *Python* because obviously data is in memory).

Nope, it's not.

On Mon, Jan 7, 2013 at 10:40 PM, PJ Eby wrote:

On Mon, Jan 7, 2013 at 11:32 AM, Brett Cannon wrote:

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On Mon, Jan 7, 2013 at 10:46 AM, Maciej Fijalkowski wrote:

...

On Mon, Jan 7, 2013 at 4:22 PM, Oleg Broytman wrote:

...

On Mon, Jan 07, 2013 at 03:06:51PM +0100, Dima Tisnek wrote:

...

Hi, is it possible to access the values stored on the stack in Python stack machine from Python?

In short: it's possible but very much discouraged. Don't hack into python internals.

Is it possible? I claim it's not (from *Python* because obviously data is in memory).

Nope, it's not.

I took that as a challenge, and just tried to do it using gc.get_referents(). ;-)

Didn't work though... which actually makes me wonder if that's a bug in gc.get_referents(), or whether I'm making a bad assumption about when you'd have to run gc.get_referents() on a frame in order to see items from the value stack included. Could this actually be a bug in frames' GC implementation, or are value stack items not supposed to count for GC purposes?

valustack is a static list in C (it's not a Python list at all) that's stored on the frame. You can't do it that way. gc.get_referrers returns you only python objects (and in fact should return you only python objects that are accessible otherwise, but those details are really implementation-dependent)