sion$
Last-Modified: $Date$
Author: Victor Stinner
Status: Draft
Type: Standards Track
Content-Type: text/x-rst
Created: 4-January-2016
Python-Version: 3.6
Abstract
Add a new private version to the builtin ``dict`` type, incremented at
each dictionary creation and at each dictionary change, to
2016-04-14 11:04 GMT+02:00 Nikita Nemkin :
> MAKE_FUNCTION opcode is complex due to the way it receives
> input arguments: (...)
Yeah, I was always disturbed how this opcode gets parameters.
> My suggestion is to pre-package 1-4 before calling MAKE_FUNCTION,
> i.e. explicitly emit BUILD_TUPLE for
2016-04-14 17:27 GMT+02:00 Guido van Rossum :
> Great analysis! What might stand in the way of adoption is concern for
> bytecode manipulation libraries that would have to be changed.
> (...)
> There's also talk of switching to wordcode, in a different thread.
I agree that breaking backward compat
2016-04-14 16:54 GMT+02:00 Ethan Furman :
>> I consider that the final goal of the whole discussion is to support
>> something like:
>>
>> path = os.path.join(pathlib_path, "str_path", direntry)
>>
>> (...)
>> I expect that DirEntry.__fspath__ uses os.fsdecode() to return str,
>> just to make
2016-04-14 17:29 GMT+02:00 Ethan Furman :
> Interoperability with other systems and/or libraries. If we use
> surrogateescape to transform str to bytes, and the other side does not, we
> no longer have a workable path.
I guess that you mean a Python library? When you exchange with
external progra
2016-04-14 18:28 GMT+02:00 Brett Cannon :
> +1 from me!
Thanks.
> A couple of grammar/typo suggestions below.
Fixed. (Yes, I want to use unsigned type, so PY_UINT64_T.)
Victor
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écrit :
> I'll wait a day before formally pronouncing to see if any objections
> are made, but it looks good to me.
>
> On Thu, Apr 14, 2016 at 8:19 AM, Victor Stinner
> > wrote:
> > Hi,
> >
> > I updated my PEP 509 to make the dictionary version globall
jeudi 14 avril 2016, Stefan Behnel a écrit :
> +1 from me, too. I'm sure we can make some use of this in Cython.
>
> Stefan
>
>
> Victor Stinner schrieb am 14.04.2016 um 17:19:
> > PEP: 509
> > Title: Add a private version to dict
>
>
>
Hi,
2016-04-14 22:42 GMT+02:00 Armin Rigo :
> Hi Victor,
>
> On 14 April 2016 at 17:19, Victor Stinner wrote:
>> Each time a dictionary is created, the global
>> version is incremented and the dictionary version is initialized to the
>> global version.
>
> A de
2016-04-14 22:50 GMT+02:00 Barry Warsaw :
> Although I'm not totally convinced, I won't continue to object. You've
> provided some performance numbers in the PEP even without FAT, and you aren't
> exposing the API to Python, so it's not a burden being imposed on other
> implementations.
Cool!
Ah
2016-04-14 23:29 GMT+02:00 Barry Warsaw :
> I can see why you might want a global version number, but not doing so would
> eliminate an implicit reliance on the GIL, or in a GIL-less implementation
> a lock around incrementing the global version number.
It's not like the builtin dict type is goin
2016-04-15 0:22 GMT+02:00 Brett Cannon :
> And even if it was GIL-free you do run the risk of two dicts ending up at
> the same version # by simply mutating the same number of times if the
> counters were per-dict instead of process-wide.
For some optimizations, it is not needed to check if the di
Le vendredi 15 avril 2016, Stefan Behnel a écrit :
> How can that be achieved? If the tag is just a sequentially growing number,
> creating two dicts and applying one operation to the first one should give
> both the same version tag, right?
>
Armin didn't propose to get ride of the global versi
It's easy to implement this function (in the native language of your Python
implemenation), it's short. I'm not sure that a Python version is really
safe.
The secrets module is for Python 3.6, in this version the hmac already
"requires" the compare_digest() function no?
Victor
___
2016-04-15 11:01 GMT+02:00 Antoine Pitrou :
> Victor Stinner gmail.com> writes:
>> You're right that incrementing the global version is useless for these
>> specific cases, and using the version 0 should work. It only matters
>> that the version (version? version t
Hi,
Would it make sense to add a function to generate a random UUID4 (as a
string) in secrets?
The current implement in uuid.py of CPython 3.6 already uses os.urandom():
def uuid4():
"""Generate a random UUID."""
return UUID(bytes=os.urandom(16), version=4)
Victor
__
2016-04-15 11:21 GMT+02:00 Steven D'Aprano :
> This isn't just a question about the secrets module. PEP 399 suggests
> than any C classes/functions should have a pure Python version as
> fallback, but compare_digest doesn't. I don't know whether it should or
> not.
The hmac module is responsible t
Hum.
if (width == 0
and height == 0
and color == 'red'
and emphasis == 'strong'
or highlight > 100):
raise ValueError("sorry, you lose")
Please remove one space to vertically align "and" operators with the
opening parenthesis:
2016-04-15 19:54 GMT+02:00 Jim J. Jewett :
> (1) Meta Question: If this is really only for CPython, then is
> "Standards Track" the right classification?
Yes, I think so. It doesn't seem to be an Informal nor a Process:
https://www.python.org/dev/peps/pep-0001/#pep-types
> (2) Why *promise* n
2016-04-15 23:07 GMT+02:00 Random832 :
> Why is iterating over items different from iterating over keys?
>
> in other words, why do I have to write:
>
> for k in dict:
> v = dict[k]
> ...do some stuff...
> dict[k] = something
>
> rather than
>
> for k, v in dict.items():
> ...do som
2016-04-15 23:16 GMT+02:00 Ethan Furman :
>> It's an useful property. For example, let's say that you have a guard
>> on globals()['value']. The guard is created with value=3. An unit test
>> replaces the value with 50, but then restore the value to its previous
>> value (3). Later, the guard is ch
Hi,
FYI I updated the implementation of the PEP 509:
https://bugs.python.org/issue26058
2016-04-15 11:01 GMT+02:00 Antoine Pitrou :
> Why do this? It's a nice property that two dicts always have different
> version tags, and now you're killing this property for... no obvious
> reason?
>
> Do you
.2016-04-15 23:45 GMT+02:00 Jim J. Jewett :
>> It's an useful property. For example, let's say that you have a guard
>> on globals()['value']. The guard is created with value=3. An unit test
>> replaces the value with 50, but then restore the value to its previous
>> value (3). Later, the guard is
2016-04-18 7:23 GMT+02:00 Burkhard Meier :
> My name is Burkhard Meier and I wrote the "Python GUI Programming Cookbook"
> published by Packt.
>
> It is available on Amazon and PacktPub.com.
Welcome!
> Maybe I can become more involved in the Python community as a Python
> developer on Windows .
ests on equal
values.
HTML version:
https://www.python.org/dev/peps/pep-0509/
PEP: 509
Title: Add a private version to dict
Version: $Revision$
Last-Modified: $Date$
Author: Victor Stinner
Status: Draft
Type: Standards Track
Content-Type: text/x-rst
Created: 4-January-2016
Python-Version: 3.6
A
Hi,
> Backwards Compatibility
> ===
>
> Since the ``PyDictObject`` structure is not part of the stable ABI and
> the new dictionary version not exposed at the Python scope, changes are
> backward compatible.
My current implementation inserts the new ma_version_tag field in the
multiple Python extensions written in C. I only found one
bug in numpy and I sent a patch (not merged yet).
victor
2016-03-15 0:19 GMT+01:00 Victor Stinner :
> 2016-02-12 14:31 GMT+01:00 M.-A. Lemburg :
>>>> If your program has bugs, you can use a debug build of Python 3.5 to
&
Hi,
I'm unable to count the number of threads about the fspath protocol.
It's even more difficult to count the total number of emails. IMHO
everyone had enough time to give him/her opinion. We even had multiple
summaries :-)
Can you please wait for a PEP? Brett Canon and Ethan Furman are
working
Hi,
2016-04-20 18:12 GMT+02:00 Brett Cannon :
>> >> Can you please wait for a PEP? Brett Canon and Ethan Furman are
>> >> working on a PEP.
>
> I was actually going to send this email when I got in to work today, but
> Victor and timezones beat me to it. :)
Ha ha, bitten by the french connection!
Hi,
Guido van Rossum and Jim J. Jewett suggested me to *not require* to
always increase the dict version if a dict method does not modify its
content. I modified the Changes section to only require that the
version is increased when the dictionary content is modified.
I also explained the nice si
, socket, etc.
were allocated on ResourceWarning:
https://docs.python.org/dev/whatsnew/3.6.html#warnings
It looks like Python 3.6 will help developers ;-)
Victor
2016-04-20 1:33 GMT+02:00 Victor Stinner :
> Ping? Is someone still opposed to my change #26249 "Change
> PyMem_Malloc to u
Hi Raymond,
2016-04-24 21:45 GMT+02:00 Raymond Hettinger :
> I think the word code patch should go in sooner rather than later. Several
> of us have been through the patch and it is in pretty good shape (some parts
> still need work though). The earlier this goes in, the more time we'll have
2016-04-24 23:16 GMT+02:00 Raymond Hettinger :
>> On Apr 24, 2016, at 1:16 PM, Victor Stinner wrote:
>> I proposed to not try to optimize ceval.c to fetch (oparg, opval) in a
>> single 16-bit operation. It should be easy to implement it later, but
>> I prefer to focus o
Oh nice. Did you see my recent "bytecode" project?
http://bytecode.readthedocs.io/
Victor
Le 5 mai 2016 8:30 PM, a écrit :
> Here is something I wrote because I was also unsatisfied with byteplay's
> API: https://github.com/zachariahreed/byteasm. Maybe it's useful in a
> discussion of "minimum v
Hi,
I modified regrtest to not ignore -j1 anymore (issue #25285). I also
modified Tools/buildbot/test.bat to add the -j1 option (-j1 was
already used on UNIX on "make buildbottest").
All buildbots will now run each test file in a fresh subprocess. It
helps to restrict all kinds of side effects of
2016-05-20 18:56 GMT+02:00 Guido van Rossum :
> Let's start in 3.6 with all this. I added path to 3.4 because I didn't
> realize it was in security-mode only.
I also had to ask the question to myself about branches, that's why I
wrote this table ;-)
https://docs.python.org/devguide/#status-of-pyth
Le 27 mai 2016 12:05 PM, "Donald Stufft" a écrit :
> BLAKE2 is an interesting one, because while SHA3 is a NIST standard (so
it’s going to gain adoption because of that), BLAKE2 is at least as strong
as SHA3 but is better in many ways, particularly in speed— it’s actually
faster than MD5 while bei
Le vendredi 27 mai 2016, M.-A. Lemburg a écrit :
>
> The curent patch is 1.2MB for SHA-3 - that's pretty heavy for just
> a few hash functions, which aren't in any wide spread use yet and
> probably won't be for quite a few years ahead.
Oh wow, it's so fat? Why is it so big? Can't we use a light
Python 3.5 requires a 64 bit signed integer to build. Search for _PyTime
type in pytime.h ;-)
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Hi,
2016-06-04 19:47 GMT+02:00 Guido van Rossum :
> Funny. Just two weeks ago I was helping someone who discovered a
> compiler that doesn't support the new relaxed variable declaration
> rules. I think it was on Windows. Maybe this move is a little too
> aggressively deprecating older Windows com
2013/10/18 Charles-François Natali :
> I'm happy to see this move forward!
Thanks for your reviews. I had some time in my train travel to improve
the implementation.
I removed the call to pthread_atfork(): tasks have been removed, it
now makes sense to keep tracemalloc enabled in the child proces
Does Python officially support opsenssl < 1.0? Which OS uses such old
version?
On Windows, Python embeds its own copy of openssl for example.
Victor
Le 19 oct. 2013 18:07, "Christian Heimes" a écrit :
> Am 19.10.2013 16:59, schrieb Antoine Pitrou:
> > But that's a fringe situation. Any normal b
2013/10/19 Larry Hastings :
> A lot has landed in trunk in the last day or two: Tulip, Argument Clinic,
> and statistics just landed too.
Wow, Python 3.4 looks great! I was waiting for statistics.
Don't forget to update the What's New in Python 3.4 document.
Victor
__
2013/10/19 Charles-François Natali :
>> get_object_trace(obj) is a shortcut for
>> get_trace(get_object_address(obj)). I agree that the wrong size
>> information can be surprising.
>>
>> I can delete get_object_trace(), or rename the function to
>> get_object_traceback() and modify it to only retur
Hi,
Would it be possible to use os.pipe() on all OSes except AIX?
Pipes and socket pairs may have minor differences, but some
applications may rely on these minor differences. For example, is the
buffer size the same? For example, in test.support, we have two
constants: PIPE_MAX_SIZE (4 MB) and S
"For the record, pipe I/O seems a little faster than socket I/O under Linux"
In and old (2006) email on LKML (Linux kernel), I read:
"as far as I know pipe() is now much faster than socketpair(), because pipe()
uses the zero-copy mechanism."
https://lkml.org/lkml/2006/9/24/121
On Linux, splice()
memory allocations
Version: $Revision$
Last-Modified: $Date$
Author: Victor Stinner
Status: Draft
Type: Standards Track
Content-Type: text/x-rst
Created: 3-September-2013
Python-Version: 3.4
Abstract
This PEP proposes to add a new ``tracemalloc`` module to trace memory
blocks allocated
Hi,
2013/10/23 Kristján Valur Jónsson :
> This might be a good place to make some comments.
> I have discussed some of this in private with Victor, but wanted to make them
> here, for the record.
Yes, I prefer to discuss the PEP on python-dev. It's nice to get more
feedback, I expect to get a be
2013/10/24 Christian Heimes :
> There seems to be a problem with the security fix "Re-seed OpenSSL's
> PRNG after fork":
>
> http://bugs.python.org/issue18747
> http://bugs.python.org/issue19227
Yes, Charles Francois warned us that adding a pthread_atfork() hook to
add entropy may add a deadlo
2013/10/24 Kristján Valur Jónsson :
>> Test 1. With the Python test suite, 467,738 traces limited to 1 frame:
> ...
>> I'm surprised: it's faster than the benchmark I ran some weeks ago.
>> Maybe I optimized something? The most critical operation, taking a snapshot
>> takes half a second, so it's e
> When I was looking for memory leaks in the regex module I simply wrote
all of the allocations, reallocations and deallocations to a log file and
then parsed it afterwards using a Python script. Simple, but effective.
He he, it's funny because you described exactly my first implementation of
trac
I updated the PEP according to different comments:
* replace Snapshot.create() class method with take_snapshot() function
* get_traces() now returns a list instead of a dict (remove addresses)
* remove get_stats()
* unknown frames are now stored as ("", 0) instead of (None, None)
* remove get_obje
Hum, timestamp and traceback_limit attributed of GroupedStats can also be
removed, they are just of the same attribute of the Snapshot class and
GroupedStats is created from Snapshot.group_by().
Le 27 oct. 2013 17:26, "Victor Stinner" a écrit :
> * do you have a better s
Hi,
While working on a fix, I got an assertion error during Python
finalization because Python tried to import the "io" module whereas
the module was just unloaded. Python tried to import the io module to
display a warning and display the Python line where the warning was
emitted. See the followin
2013/10/4 Raymond Hettinger :
>> On Sep 22, 2013, at 6:16 PM, Ethan Furman wrote:
>>
> Are we close to asking for pronouncement?
>
> When you're ready, let me know.
The deadline for new features is in less than 1 month, so what is the
status of the PEP 455 (TransformDict)?
Victor
___
2013/10/29 Georg Brandl :
> Am 29.10.2013 01:19, schrieb victor.stinner:
>> http://hg.python.org/cpython/rev/4ef4578db38a
>> changeset: 86715:4ef4578db38a
>> user: Victor Stinner
>> date:Tue Oct 29 01:19:37 2013 +0100
>> summ
2013/10/29 Georg Brandl :
>> diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
>> --- a/Objects/unicodeobject.c
>> +++ b/Objects/unicodeobject.c
>> @@ -3766,6 +3766,7 @@
>> return NULL;
>> _PyUnicode_UTF8(unicode) = PyObject_MALLOC(PyBytes_GET_SIZE(bytes)
>> + 1)
2013/10/29 Jim Jewett :
> reset() function:
>
> Clear traces of memory blocks allocated by Python.
>
> Does this do anything besides clear? If not, why not just re-use the
> 'clear' name from dicts?
(I like the reset() name. Charles-François suggested this name
inspired by OProfile AP
Hi,
Since Python 3.3, when a file or socket object is destroyed before
being closed, a ResourceWarning is emitted. The warning is emitted
where the object is destroyed: it's common to see "gc.collect()"
location in the Python test suite for example.
Tarek Ziadé asked on Twitter if there is a tool
2013/10/29 Nick Coghlan :
> I was thinking you could turn on warnings->errors and then catch the
> exception, and use that to get hold of the original object that
> triggered the resource warning, and then fed *that* into
> tracemalloc.get_object_traceback(). But, alas, even if we tweaked
> Resourc
2013/10/26 Kristján Valur Jónsson :
> In that case, how about adding a client/server feature?
>
> If you standardize the format, a minimal tracing client could write a log,
> or send it to a socket, in a way that can be turned into a snapshot by a
> corresponsing utility reading from a file or list
Hi,
2013/10/30 Jim J. Jewett :
> Well, unless I missed it... I don't see how to get anything beyond
> the return value of get_traces, which is a (time-ordered?) list
> of allocation size with then-current call stack. It doesn't mention
> any attribute for indicating that some entries are de-alloc
2013/10/30 Stephen J. Turnbull :
> Just "reset" implies to me that you're ready to start over. Not just
> traced memory blocks but accumulated statistics and any configuration
> (such as Filters) would also be reset. Also tracing would be disabled
> until started explicitly.
If the name is reall
2013/10/30 Kristján Valur Jónsson :
> The point of a PEP is getting something into standard python. The command
> line flag is also part of this.
> Piggybacking a lightweight client/server data-gathering version of this on
> top of the PEP
> could be beneficial in that respect.
In my opinion, y
> Snapshot
>
>
> ``Snapshot(timestamp: datetime.datetime, traceback_limit: int, stats:
> dict=None, traces: dict=None)`` class:
>
> Snapshot of statistics and traces of memory blocks allocated by
> Python.
>
> ``apply_filters(filters)`` method:
>
> Apply filters on the ``traces
Le 30 oct. 2013 20:58, "Jim Jewett" a écrit :
> hough if you use a dict internally, that might not
> be the case.
Tracemalloc uses a {address: trace} duct internally.
> If you return it as a list instead of a dict, but that list is
> NOT in time-order, that is worth documenting
Ok i will docum
New update of the PEP combining various remarks:
* Remove GroupedStats class and Snapshot.group_by(): replaced with a
new Snapshot.statistics() method which combines all features
* Rename reset() to clear_traces() and explain how to get traces
before clearing traces
* Snapshot.apply_filters() now
2013/10/31 Victor Stinner :
> Log calls to the memory allocator
> -
>
> A different approach is to log calls to ``malloc()``, ``realloc()`` and
> ``free()`` functions. Calls can be logged into a file or send to another
> computer through the net
2013/10/29 Victor Stinner :
> 2013/10/29 Kristján Valur Jónsson :
>> I was thinking something similar. It would be useful to be able to "pause"
>> and "resume"
>> if one is doing any analysis work in the live environment. This would
>&
2013/10/31 Victor Stinner :
> If I give access to this flag, it would be possible to disable
> temporarily tracing in the current thread, but tracing would still be
> enabled in other threads. Would it fit your requirement?
It's probably not what you are looking for :-)
As I wr
"n-th version": Sorry, I don't remember the version number of the PEP :-)
http://www.python.org/dev/peps/pep-0454/
Lastest changes:
* rename disable/enable/is_enabled() to stop/start/is_tracing()
* Snapshot.apply_filters() now returns a new Snapshot instance
* a traceback now always contains
, but then falls back to IPv4. Firefox tries first IPv4 and so
doesn't have the issue.
Victor
2013/10/12 Antoine Pitrou :
>
> Opened issue at http://psf.upfronthosting.co.za/roundup/meta/issue528
>
> Regards
>
> Antoine.
>
>
>
> Le samedi 12 octobre 2013 à 14:
2013/11/4 M.-A. Lemburg :
> Some things to try on the box:
>
> * ping6 2001:888:2000:d::a2 (that's python.org)
$ ping6 -c 4 2001:888:2000:d::a2
PING 2001:888:2000:d::a2(2001:888:2000:d::a2) 56 data bytes
64 bytes from 2001:888:2000:d::a2: icmp_seq=1 ttl=56 time=53.0 ms
64 bytes from 2001:888:2000:
2013/11/3 Victor Stinner :
> "n-th version": Sorry, I don't remember the version number of the PEP :-)
>
>http://www.python.org/dev/peps/pep-0454/
Charles-François doesn't like the magic Statistic.key attribute which
may be a string, a tuple of 2 strings, or a tu
2013/11/6 R. David Murray :
> On Wed, 06 Nov 2013 23:34:22 +1100, Steven D'Aprano
> wrote:
>> On Tue, Nov 05, 2013 at 08:38:09PM -0800, Ethan Furman wrote:
>>
>> > http://bugs.python.org/issue19332
>>
>> Duplicate of this: http://bugs.python.org/issue6017
>>
>> The conclusion on that also was tha
Hi,
I'm trying to avoid unnecessary temporary Unicode strings when
possible (see issue #19512). While working on this, I saw that Python
likes preparing an user friendly message to explain why getting an
attribute failed. The problem is that in most cases, the caller
doesn't care of the message: t
2013/11/7 Steven D'Aprano :
> My initial instinct here was to say that sounded like premature
> optimization, but to my surprise the overhead of generating the error
> message is actually significant -- at least from pure Python 3.3 code.
I ran a quick and dirty benchmark by replacing the error me
2013/11/7 Benjamin Peterson :
> 2013/11/7 victor.stinner :
>> http://hg.python.org/cpython/rev/99afa4c74436
>> changeset: 86995:99afa4c74436
>> user: Victor Stinner
>> date:Thu Nov 07 13:33:36 2013 +0100
>> summary:
>> Fix _Py_normaliz
2013/11/7 Eric V. Smith :
> Then how about at least a comment about how 6 is derived?
>
> if (lower_len < 6) /* 6 == strlen("utf-8") + 1 */
> return 0;
Ok, I added the comment in changeset 9c929b9e0a2a.
Victor
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Python-Dev mail
Hi,
[PyRun_InteractiveOneObject()]
2013/11/8 Nick Coghlan :
> New C APIs should either be documented or have an underscore prefix.
I created the issue #19518 to add documentation (but also to add even
more functions :-)).
> Also, if they're part of the stable ABI, they need a version guard.
As
2013/11/8 Nick Coghlan :
>> http://hg.python.org/cpython/rev/69071054b42f
>> changeset: 86968:69071054b42f
>> user:Victor Stinner
>> date:Wed Nov 06 18:58:22 2013 +0100
>> summary:
>> Issue #19512: Add a new _PyDict_DelItemId() function
2013/11/8 Nick Coghlan :
>> [PyRun_InteractiveOneObject()]
>> (...)
>> > Also, if they're part of the stable ABI, they need a version guard.
>>
>> As most PyRun_xxx() functions, the function is declared in a "#ifndef
>> Py_LIMITED_API" block. It means that it is not part of the stable ABI,
>> is th
2013/11/8 Victor Stinner :
> Another question: it's not documented if a function is part or not
> part of the stable ABI. So as an user of the API, it is hard to check
> if a function is part of the stable ABI or not.
A solution for that it maybe to split the documentation of th
2013/11/8 Nick Coghlan :
>> In Python 3.3, _PyDict_GetItemIdWithError(), _PyDict_GetItemId() and
>> _PyDict_SetItemId() are part of the stable ABI if I read correctly
>> dictobject.h. _PyObject_GetAttrId() is also part of the stable ABI.
>> Was it a mistake, or did I misunderstand how stable functi
Oh congrats Eric for your PEP. I like it.
Victor
Le vendredi 8 novembre 2013, Eric Snow a écrit :
> I'm pleased to announce that Brett Cannon and Nick Coghlan (the
> co-BDFL-delegates) have accepted PEP 451 for inclusion in Python 3.4.
> Both of them have contributed substantially to the discuss
2013/11/10 Benjamin Peterson :
> All the changes in Python 2.7.6 are described in full detail in the Misc/NEWS
> file of the source tarball. You can also view online at
>
> http://hg.python.org/cpython/raw-file/99d03261c1ba/Misc/NEWS
- Issue #18747: Re-seed OpenSSL's pseudo-random number gener
I'm happy with the latest PEP because it is minimal but core features are
still present:
- get the traceback where an object was allocated,
- get traces of memory blocks,
- compute statistics on memory usage per line, file or traceback,
- compute differences between two snapshots.
We now have an
2013/11/11 Charles-François Natali :
> After several exchanges with Victor, PEP 454 has reached a status
> which I consider ready for pronuncement [1]: so if you have any last
> minute comment, now is the time!
Because the PEP has a long history, 49 mercurial revisions between
september and novemb
Hi,
After having work during 3 years on a pysandbox project to sandbox
untrusted code, I now reached a point where I am convinced that
pysandbox is broken by design. Different developers tried to convinced
me before that pysandbox design is unsafe, but I had to experience it
myself to be convinece
Hi Giampaolo,
You forgot to update tests after your change in repr(socket). Tests
are failing on buildbots, just one example:
==
FAIL: test_repr (test.test_socket.GeneralModuleTests)
--
2013/11/13 Josiah Carlson :
> Python-dev is for the development of the Python core language, the CPython
> runtime, and libraries. Your sandbox, despite using and requiring deep
> knowledge of the runtime, is not developing those things. If you had a
> series of requests for the language or runtime
2013/11/13 Terry Reedy :
> There are several websites running submitted Python code (and in some cases,
> many other languages).
> ProjectEuler
> CodeAcademy (I think they use someone else's code box)
> CheckIO.org - python only
> other coding challenge sites
> I suspect they use sandboxed processe
2013/11/13 Glenn Linderman :
> If it is an implementation issue, then perhaps a different implementation
> would help. Or perhaps a "safe compiler".
There is PyPy with its sandbox.
> If it is a language design issue, then a different implementation wouldn't
> help, it would require a new language
2013/11/14 Chris Barker :
> (note this is about 2.7 -- sorry, but a lot of us still use that! I
> can only assume that in 3.* this is a non-issue)
>
> I just discovered an issue that's been around a long time:
>
> If you create an Exception with a unicode object for the message, (...)
In Python 2,
Hi,
I saw that Nick Coghlan documented codecs.encode() and
codecs.decode(), and changed the exception raised when codecs like
rot_13 are used on bytes.decode() and str.encode().
I don't like the functions codecs.encode() and codecs.decode() because
the type of the result depends on the encoding (
is required to explain why we took this decision
and list rejected alternatives.
http://bugs.python.org/issue7475
Victor
2013/11/14 Victor Stinner :
> Hi,
>
> I saw that Nick Coghlan documented codecs.encode() and
> codecs.decode(), and changed the exception raised when codec
2013/11/15 Nick Coghlan :
> The reason I'm now putting some effort into better documenting the
> status quo for codec handling in Python 3 and filing off some of the
> rough edges (rather than proposing adding any new APIs to Python 3.x)
> is because the users I care about in this matter are web de
2013/11/15 Trent Nelson :
> This sounds a lot like the work I initially did with PyParallel to
> try and intercept/prevent parallel threads mutating main-thread
> objects.
>
> I ended up arriving at a much better solution by just relying on
> memory protection; main thread pages
2013/11/16 Nick Coghlan :
> To address Serhiy's security concerns with the compression codecs (which are
> technically independent of the question of restoring the aliases), I also
> plan to document how to systematically blacklist particular codecs in an
> application by setting attributes on the
Why not using str type for str and str subtypes, and bytes type for bytes
and bytes-like object (bytearray, memoryview)? I don't think that we need
an ABC here.
Victor
Le 16 nov. 2013 10:44, "Nick Coghlan" a écrit :
> On 16 Nov 2013 10:47, "Victor Stinner" wr
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