Hi Brett,
Sorry about that, I did not mean to be rude.
What I wanted to says is:
1.
That I relied on such a feature
2.
Other people on this mailing-list already asked something similar at several occasions
3.
HEAPTYPE would not always be a solution
4.
Then I thought this was something that would indeed need more discussion and might get acceptance if discussed once again.
Eloi
From: Brett Cannon <brett@python.org>
Sent: Tuesday, June 26, 2018 8:53 PM
To: Eloi Gaudry <Eloi.Gaudry@fft.be>
Cc: encukou@gmail.com; python-ideas@python.org
Subject: Re: [Python-ideas] Allow mutable builtin types (optionally)
This request didn't have a lot of traction, but I still consider this is something that would need to be supported
Please be careful about using the word "need" as it comes off as demanding instead of as a suggestion.
(2 lines of code to be changed; no regression so far with python 2 and python 3).
My main points are:
- HEAP_TYPE is not really used (as anyone being using it ?)
- HEAP_TYPE serves other purposes
- extension would benefit for allowing direct access to any of its type attributes
Petr, what do you think ?
Eloi
On Mon, 2018-05-07 at 15:23 -0400, Petr Viktorin wrote:
> On 05/07/18 11:37, Eloi Gaudry wrote:
> > I mean, to my knowledge, there is no reason why a type should be
> > allocated on the heap (https://docs.python.org/2/c-api/typeobj.html
> > ) to
> > be able to change its attributes at Python level.
>
> One reason is sub-interpreter support: you can have multiple
> interpreters per process, and those shouldn't influence each other.
> (see
https://docs.python.org/3/c-api/init.html#sub-interpreter-suppor
> t)
>
> With heap types, each sub-interpreter can have its own copy of the
> type
> object. But with builtins, changes done in one interpreter would be
> visible in all the others.
Yes, this could be a reason, but if you don't rely on such a feature
neither implicitly nor explicitly ?
I mean, our types are built-in and should be considered as immutable
across interpreters. And we (as most users I guess) are only running
one interpreter.
In case several intepreters are used, it would make sense to have a
non-heap type that would be seen as a singleton across all of them, no
?
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