Mailman 3 December 2016 - Python-Dev

PEP 1, PEP Purpose and Guidelines
by barry＠zope.com 18 May '21

18 May '21

It has been a while since I posted a copy of PEP 1 to the mailing lists and newsgroups. I've recently done some updating of a few sections, so in the interest of gaining wider community participation in the Python development process, I'm posting the latest revision of PEP 1 here. A version of the PEP is always available on-line at http://www.python.org/peps/pep-0001.html Enjoy, -Barry -------------------- snip snip -------------------- PEP: 1 Title: PEP Purpose and Guidelines Version: $Revision: 1.36 $ Last-Modified: $Date: 2002/07/29 18:34:59 $ Author: Barry A. Warsaw, Jeremy Hylton Status: Active Type: Informational Created: 13-Jun-2000 Post-History: 21-Mar-2001, 29-Jul-2002 What is a PEP? PEP stands for Python Enhancement Proposal. A PEP is a design document providing information to the Python community, or describing a new feature for Python. The PEP should provide a concise technical specification of the feature and a rationale for the feature. We intend PEPs to be the primary mechanisms for proposing new features, for collecting community input on an issue, and for documenting the design decisions that have gone into Python. The PEP author is responsible for building consensus within the community and documenting dissenting opinions. Because the PEPs are maintained as plain text files under CVS control, their revision history is the historical record of the feature proposal[1]. Kinds of PEPs There are two kinds of PEPs. A standards track PEP describes a new feature or implementation for Python. An informational PEP describes a Python design issue, or provides general guidelines or information to the Python community, but does not propose a new feature. Informational PEPs do not necessarily represent a Python community consensus or recommendation, so users and implementors are free to ignore informational PEPs or follow their advice. PEP Work Flow The PEP editor, Barry Warsaw <peps(a)python.org>, assigns numbers for each PEP and changes its status. The PEP process begins with a new idea for Python. It is highly recommended that a single PEP contain a single key proposal or new idea. The more focussed the PEP, the more successfully it tends to be. The PEP editor reserves the right to reject PEP proposals if they appear too unfocussed or too broad. If in doubt, split your PEP into several well-focussed ones. Each PEP must have a champion -- someone who writes the PEP using the style and format described below, shepherds the discussions in the appropriate forums, and attempts to build community consensus around the idea. The PEP champion (a.k.a. Author) should first attempt to ascertain whether the idea is PEP-able. Small enhancements or patches often don't need a PEP and can be injected into the Python development work flow with a patch submission to the SourceForge patch manager[2] or feature request tracker[3]. The PEP champion then emails the PEP editor <peps(a)python.org> with a proposed title and a rough, but fleshed out, draft of the PEP. This draft must be written in PEP style as described below. If the PEP editor approves, he will assign the PEP a number, label it as standards track or informational, give it status 'draft', and create and check-in the initial draft of the PEP. The PEP editor will not unreasonably deny a PEP. Reasons for denying PEP status include duplication of effort, being technically unsound, not providing proper motivation or addressing backwards compatibility, or not in keeping with the Python philosophy. The BDFL (Benevolent Dictator for Life, Guido van Rossum) can be consulted during the approval phase, and is the final arbitrator of the draft's PEP-ability. If a pre-PEP is rejected, the author may elect to take the pre-PEP to the comp.lang.python newsgroup (a.k.a. python-list(a)python.org mailing list) to help flesh it out, gain feedback and consensus from the community at large, and improve the PEP for re-submission. The author of the PEP is then responsible for posting the PEP to the community forums, and marshaling community support for it. As updates are necessary, the PEP author can check in new versions if they have CVS commit permissions, or can email new PEP versions to the PEP editor for committing. Standards track PEPs consists of two parts, a design document and a reference implementation. The PEP should be reviewed and accepted before a reference implementation is begun, unless a reference implementation will aid people in studying the PEP. Standards Track PEPs must include an implementation - in the form of code, patch, or URL to same - before it can be considered Final. PEP authors are responsible for collecting community feedback on a PEP before submitting it for review. A PEP that has not been discussed on python-list(a)python.org and/or python-dev(a)python.org will not be accepted. However, wherever possible, long open-ended discussions on public mailing lists should be avoided. Strategies to keep the discussions efficient include, setting up a separate SIG mailing list for the topic, having the PEP author accept private comments in the early design phases, etc. PEP authors should use their discretion here. Once the authors have completed a PEP, they must inform the PEP editor that it is ready for review. PEPs are reviewed by the BDFL and his chosen consultants, who may accept or reject a PEP or send it back to the author(s) for revision. Once a PEP has been accepted, the reference implementation must be completed. When the reference implementation is complete and accepted by the BDFL, the status will be changed to `Final.' A PEP can also be assigned status `Deferred.' The PEP author or editor can assign the PEP this status when no progress is being made on the PEP. Once a PEP is deferred, the PEP editor can re-assign it to draft status. A PEP can also be `Rejected'. Perhaps after all is said and done it was not a good idea. It is still important to have a record of this fact. PEPs can also be replaced by a different PEP, rendering the original obsolete. This is intended for Informational PEPs, where version 2 of an API can replace version 1. PEP work flow is as follows: Draft -> Accepted -> Final -> Replaced ^ +----> Rejected v Deferred Some informational PEPs may also have a status of `Active' if they are never meant to be completed. E.g. PEP 1. What belongs in a successful PEP? Each PEP should have the following parts: 1. Preamble -- RFC822 style headers containing meta-data about the PEP, including the PEP number, a short descriptive title (limited to a maximum of 44 characters), the names, and optionally the contact info for each author, etc. 2. Abstract -- a short (~200 word) description of the technical issue being addressed. 3. Copyright/public domain -- Each PEP must either be explicitly labelled as placed in the public domain (see this PEP as an example) or licensed under the Open Publication License[4]. 4. Specification -- The technical specification should describe the syntax and semantics of any new language feature. The specification should be detailed enough to allow competing, interoperable implementations for any of the current Python platforms (CPython, JPython, Python .NET). 5. Motivation -- The motivation is critical for PEPs that want to change the Python language. It should clearly explain why the existing language specification is inadequate to address the problem that the PEP solves. PEP submissions without sufficient motivation may be rejected outright. 6. Rationale -- The rationale fleshes out the specification by describing what motivated the design and why particular design decisions were made. It should describe alternate designs that were considered and related work, e.g. how the feature is supported in other languages. The rationale should provide evidence of consensus within the community and discuss important objections or concerns raised during discussion. 7. Backwards Compatibility -- All PEPs that introduce backwards incompatibilities must include a section describing these incompatibilities and their severity. The PEP must explain how the author proposes to deal with these incompatibilities. PEP submissions without a sufficient backwards compatibility treatise may be rejected outright. 8. Reference Implementation -- The reference implementation must be completed before any PEP is given status 'Final,' but it need not be completed before the PEP is accepted. It is better to finish the specification and rationale first and reach consensus on it before writing code. The final implementation must include test code and documentation appropriate for either the Python language reference or the standard library reference. PEP Template PEPs are written in plain ASCII text, and should adhere to a rigid style. There is a Python script that parses this style and converts the plain text PEP to HTML for viewing on the web[5]. PEP 9 contains a boilerplate[7] template you can use to get started writing your PEP. Each PEP must begin with an RFC822 style header preamble. The headers must appear in the following order. Headers marked with `*' are optional and are described below. All other headers are required. PEP: <pep number> Title: <pep title> Version: <cvs version string> Last-Modified: <cvs date string> Author: <list of authors' real names and optionally, email addrs> * Discussions-To: <email address> Status: <Draft | Active | Accepted | Deferred | Final | Replaced> Type: <Informational | Standards Track> * Requires: <pep numbers> Created: <date created on, in dd-mmm-yyyy format> * Python-Version: <version number> Post-History: <dates of postings to python-list and python-dev> * Replaces: <pep number> * Replaced-By: <pep number> The Author: header lists the names and optionally, the email addresses of all the authors/owners of the PEP. The format of the author entry should be address(a)dom.ain (Random J. User) if the email address is included, and just Random J. User if the address is not given. If there are multiple authors, each should be on a separate line following RFC 822 continuation line conventions. Note that personal email addresses in PEPs will be obscured as a defense against spam harvesters. Standards track PEPs must have a Python-Version: header which indicates the version of Python that the feature will be released with. Informational PEPs do not need a Python-Version: header. While a PEP is in private discussions (usually during the initial Draft phase), a Discussions-To: header will indicate the mailing list or URL where the PEP is being discussed. No Discussions-To: header is necessary if the PEP is being discussed privately with the author, or on the python-list or python-dev email mailing lists. Note that email addresses in the Discussions-To: header will not be obscured. Created: records the date that the PEP was assigned a number, while Post-History: is used to record the dates of when new versions of the PEP are posted to python-list and/or python-dev. Both headers should be in dd-mmm-yyyy format, e.g. 14-Aug-2001. PEPs may have a Requires: header, indicating the PEP numbers that this PEP depends on. PEPs may also have a Replaced-By: header indicating that a PEP has been rendered obsolete by a later document; the value is the number of the PEP that replaces the current document. The newer PEP must have a Replaces: header containing the number of the PEP that it rendered obsolete. PEP Formatting Requirements PEP headings must begin in column zero and the initial letter of each word must be capitalized as in book titles. Acronyms should be in all capitals. The body of each section must be indented 4 spaces. Code samples inside body sections should be indented a further 4 spaces, and other indentation can be used as required to make the text readable. You must use two blank lines between the last line of a section's body and the next section heading. You must adhere to the Emacs convention of adding two spaces at the end of every sentence. You should fill your paragraphs to column 70, but under no circumstances should your lines extend past column 79. If your code samples spill over column 79, you should rewrite them. Tab characters must never appear in the document at all. A PEP should include the standard Emacs stanza included by example at the bottom of this PEP. A PEP must contain a Copyright section, and it is strongly recommended to put the PEP in the public domain. When referencing an external web page in the body of a PEP, you should include the title of the page in the text, with a footnote reference to the URL. Do not include the URL in the body text of the PEP. E.g. Refer to the Python Language web site [1] for more details. ... [1] http://www.python.org When referring to another PEP, include the PEP number in the body text, such as "PEP 1". The title may optionally appear. Add a footnote reference that includes the PEP's title and author. It may optionally include the explicit URL on a separate line, but only in the References section. Note that the pep2html.py script will calculate URLs automatically, e.g.: ... Refer to PEP 1 [7] for more information about PEP style ... References [7] PEP 1, PEP Purpose and Guidelines, Warsaw, Hylton http://www.python.org/peps/pep-0001.html If you decide to provide an explicit URL for a PEP, please use this as the URL template: http://www.python.org/peps/pep-xxxx.html PEP numbers in URLs must be padded with zeros from the left, so as to be exactly 4 characters wide, however PEP numbers in text are never padded. Reporting PEP Bugs, or Submitting PEP Updates How you report a bug, or submit a PEP update depends on several factors, such as the maturity of the PEP, the preferences of the PEP author, and the nature of your comments. For the early draft stages of the PEP, it's probably best to send your comments and changes directly to the PEP author. For more mature, or finished PEPs you may want to submit corrections to the SourceForge bug manager[6] or better yet, the SourceForge patch manager[2] so that your changes don't get lost. If the PEP author is a SF developer, assign the bug/patch to him, otherwise assign it to the PEP editor. When in doubt about where to send your changes, please check first with the PEP author and/or PEP editor. PEP authors who are also SF committers, can update the PEPs themselves by using "cvs commit" to commit their changes. Remember to also push the formatted PEP text out to the web by doing the following: % python pep2html.py -i NUM where NUM is the number of the PEP you want to push out. See % python pep2html.py --help for details. Transferring PEP Ownership It occasionally becomes necessary to transfer ownership of PEPs to a new champion. In general, we'd like to retain the original author as a co-author of the transferred PEP, but that's really up to the original author. A good reason to transfer ownership is because the original author no longer has the time or interest in updating it or following through with the PEP process, or has fallen off the face of the 'net (i.e. is unreachable or not responding to email). A bad reason to transfer ownership is because you don't agree with the direction of the PEP. We try to build consensus around a PEP, but if that's not possible, you can always submit a competing PEP. If you are interested assuming ownership of a PEP, send a message asking to take over, addressed to both the original author and the PEP editor <peps(a)python.org>. If the original author doesn't respond to email in a timely manner, the PEP editor will make a unilateral decision (it's not like such decisions can be reversed. :). References and Footnotes [1] This historical record is available by the normal CVS commands for retrieving older revisions. For those without direct access to the CVS tree, you can browse the current and past PEP revisions via the SourceForge web site at http://cvs.sourceforge.net/cgi-bin/cvsweb.cgi/python/nondist/peps/?cvsroot=… [2] http://sourceforge.net/tracker/?group_id=5470&atid=305470 [3] http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse [4] http://www.opencontent.org/openpub/ [5] The script referred to here is pep2html.py, which lives in the same directory in the CVS tree as the PEPs themselves. Try "pep2html.py --help" for details. The URL for viewing PEPs on the web is http://www.python.org/peps/ [6] http://sourceforge.net/tracker/?group_id=5470&atid=305470 [7] PEP 9, Sample PEP Template http://www.python.org/peps/pep-0009.html Copyright This document has been placed in the public domain. Local Variables: mode: indented-text indent-tabs-mode: nil sentence-end-double-space: t fill-column: 70 End:

8 14

congrats on 3.5! Alas, windows 7 users are having problems installing it
by Laura Creighton 15 Sep '19

15 Sep '19

webmaster has already heard from 4 people who cannot install it. I sent them to the bug tracker or to python-list but they seem not to have gone either place. Is there some guide I should be sending them to, 'how to debug installation problems'? Laura

5 6

OpenIndiana and Solaris support
by Victor Stinner 27 Mar '17

27 Mar '17

Hi, My question is simple: do we officially support Solaris and/or OpenIndiana? Jesus Cea runs an OpenIndiana buildbot slave: http://buildbot.python.org/all/buildslaves/cea-indiana-x86 "Open Indiana 32 bits" The platform module of Python says "Solaris-2.11", I don't know the exact OpenIndiana version. A lot of unit tests fail on this buildbot with MemoryError. I guess that it's related to Solaris which doesn't allow overcommit (allocating more memory than available memory on the system), or more simply because the slave has not enough memory. There is now an issue which seems specific to OpenIndiana: http://bugs.python.org/issue27847 It might impact Solaris as well, but the Solaris buildbot is offline since "684 builds". Five years ago, I reported a bug because the curses module of Python 3 doesn't build on Solaris nor OpenIndiana anymore. It seems like the bug was not fixed, and the issue is still open: http://bugs.python.org/issue13552 So my question is if we officially support Solaris and/or OpenIndiana. If yes, how can we fix issues when we only have buildbot slave which has memory errors, and no SSH access to this server? Solaris doesn't seem to be officially supported in Python, so I suggest to drop the OpenIndiana buildbot (which is failing since at least 2 years) and close all Solaris issues as "WONTFIX". Victor

6 12

Default formatting
by Serhiy Storchaka 22 Jan '17

22 Jan '17

Classes that doesn't define the __format__ method for custom PEP 3101 formatting inherits it from parents. Originally the object.__format__ method was designed as [1]: def __format__(self, format_spec): return format(str(self), format_spec) An instance is converted to string and resulting string is formatted according to format specifier. Later this design was reconsidered [2], and now object.__format__ is equivalent to: def __format__(self, format_spec): assert format_spec == '' return format(str(self), '') Non-empty format specifier is rejected. But why call format() on resulting string? Why not return resulting string as is? object.__format__ could be simpler (not just implementation, but for understanding): def __format__(self, format_spec): assert format_spec == '' return str(self) This can change the behaviour in corner case. str(self) can return not exact string, but string subclass with overloaded __format__. But I think we can ignore such subtle difference. [1] https://www.python.org/dev/peps/pep-3101/ [2] http://bugs.python.org/issue7994

4 6

PyObject_CallFunction(func, "O", arg) special case
by Victor Stinner 17 Jan '17

17 Jan '17

Hi, The PyObject_CallFunction() function has a special case when the format string is "O", to pass exactly one Python object: * If the argument is a tuple, the tuple is unpacked: it behaves like func(*arg) * Otherwise, it behaves like func(arg) This case is not documented in the C API ! https://docs.python.org/dev/c-api/object.html#c.PyObject_CallFunction The following C functions have the special case: * PyObject_CallFunction(), _PyObject_CallFunction_SizeT() * PyObject_CallMethod(), _PyObject_CallMethod_SizeT() * _PyObject_CallMethodId(), _PyObject_CallMethodId_SizeT() I guess that it's a side effect of the implementation: the code uses Py_BuildValue() and then checks if the value is a tuple or not. Py_BuildValue() is a little bit surprising: * "i" creates an integer object * "ii" creates a tuple * "(i)" and "(ii)" create a tuple. Getting a tuple or not depends on the length of the format string. It is not obvious when you have nested tuples like "O(OO)". Because of the special case, passing a tuple as the only argument requires to write "((...))" instead of just "(...)". In the past, this special behaviour caused a bug in generator.send(arg), probably because the author of the C code implementing generator.send() wasn't aware of the special case. See the issue: http://bugs.python.org/issue21209 I found code using "O" format in the new _asyncio module, and I'm quite sure that unpacking special case is not expected. So I opened an issue: http://bugs.python.org/issue28920 Last days, I patched functions of PyObject_CallFunction() family to use internally fast calls. I implemented the special case to keep backward compatibility. I replaced a lot of code using PyObject_CallFunction() with PyObject_CallFunctionObjArgs() when the format string was only made of "O", PyObject* arguments. I made this change to optimize the code, but indirectly, it avoids also the special case for code which used exactly "O" format. See: http://bugs.python.org/issue28915 When I made these changes, I found some functions which rely the unpacking feature! * time_strptime() (change 49a7fdc0d40a) * unpickle() of _ctypes (change ceb22b8f6d32) I don't know well what we are supposed to do. I don't think that changing the behaviour of PyObject_CallFunction() to remove the special case is a good idea. It would be an obvious backward incompatible change which can break applications. I guess that the minimum is to document the special case? Victor

3 9

Is there any remaining reason why weakref callbacks shouldn't be able to access the referenced object?
by Nathaniel Smith 15 Jan '17

15 Jan '17

Hi all, It's an old feature of the weakref API that you can define an arbitrary callback to be invoked when the referenced object dies, and that when this callback is invoked, it gets handed the weakref wrapper object -- BUT, only after it's been cleared, so that the callback can't access the originally referenced object. (I.e., this callback will never raise: def callback(ref): assert ref() is None.) AFAICT the original motivation for this seems was that if the weakref callback could get at the object, then the weakref callback would effectively be another finalizer like __del__, and finalizers and reference cycles don't mix, so weakref callbacks can't be finalizers. There's a long document from the 2.4 days about all the terrible things that could happen if arbitrary code like callbacks could get unfettered access to cyclic isolates at weakref cleanup time [1]. But that was 2.4. In the mean time, of course, PEP 442 fixed it so that finalizers and weakrefs mix just fine. In fact, weakref callbacks are now run *before* __del__ methods [2], so clearly it's now okay for arbitrary code to touch the objects during that phase of the GC -- at least in principle. So what I'm wondering is, would anything terrible happen if we started passing still-live weakrefs into weakref callbacks, and then clearing them afterwards? (i.e. making step 1 of the PEP 442 cleanup order be "run callbacks and then clear weakrefs", instead of the current "clear weakrefs and then run callbacks"). I skimmed through the PEP 442 discussion, and AFAICT the rationale for keeping the old weakref behavior was just that no-one could be bothered to mess with it [3]. [The motivation for my question is partly curiosity, and partly that in the discussion about how to handle GC for async objects, it occurred to me that it might be very nice if arbitrary classes that needed access to the event loop during cleanup could do something like def __init__(self, ...): loop = asyncio.get_event_loop() loop.gc_register(self) # automatically called by the loop when I am GC'ed; async equivalent of __del__ async def aclose(self): ... Right now something *sort* of like this is possible but it requires a much more cumbersome API, where every class would have to implement logic to fetch a cleanup callback from the loop, store it, and then call it from its __del__ method -- like how PEP 525 does it. Delaying weakref clearing would make this simpler API possible.] -n [1] https://github.com/python/cpython/blob/master/Modules/gc_weakref.txt [2] https://www.python.org/dev/peps/pep-0442/#id7 [3] https://mail.python.org/pipermail/python-dev/2013-May/126592.html -- Nathaniel J. Smith -- https://vorpus.org

3 5

--with-fpectl changes the CPython ABI
by Nathaniel Smith 02 Jan '17

02 Jan '17

Hi all, Well, we finally got that ucs2/ucs4 stuff all sorted out (yay), but I just learned that there's another CPython build flag that also changes the ABI: --with-fpectl Specifically, it seems that if you build CPython with --with-fpectl, and then use that CPython to build an extension module, and that extension module uses PyFPE_{START,END}_PROTECT (like e.g. Cython modules do), and you then try to import that extension module on a CPython that *wasn't* built with --with-fpectl, then it will crash. This bug report has more gory details: https://github.com/numpy/numpy/issues/8415 The reverse is OK -- extensions built in a no-fpectl CPython can be imported by both no-fpectl and yes-fpectl CPythons. So one consequence is easy -- we need to make a note in the manylinux1 definition saying that you have to use a no-fpectl CPython build to make manylinux1 wheels, because that's the only way to guarantee compatibility. I just submitted a PR for this: https://github.com/python/peps/pull/166 (Fortunately the manylinux1 docker images are already set up this way, so in practice I think everyone is already doing this.) But... in general this is kind of an unfortunate issue, and it's not restricted to Linux. Should we do something? Some options: Add another ABI flag -- e.g. cp35dmf vs. cp35dm? Though AFAICT the offending macros are actually part of the allegedly stable ABI (!!), so I guess this isn't really a solution. (I'm not 100% confident about how to tell whether something is part of the stable ABI, but: Python.h unconditionally imports pyfpe.h, and pyfpe.h doesn't have any Py_LIMITED_API checks.) Drop support for fpectl entirely in 3.7 on the grounds that it's not worth the trouble? (The docs have said "don't use this" at the top forever[1], and after clicking through every hit on github code search for language = Python and string "turnon_sigfpe" [2], I found exactly 4 non-documentation usages [3], all of which are already broken in no-fpectl builds.) We obviously can't do this in a point release though, because there are lots of extant extension modules referencing these symbols. Or maybe make it so that even no-fpectl builds still export the necessary symbols so that yes-fpectl extensions don't crash on import? (This has the advantage that it can be done in a point release...) Thoughts? -n [1] https://docs.python.org/2/library/fpectl.html [2] https://github.com/search?l=Python&p=1&q=turnon_sigfpe&type=Code&utf8=%E2%9… [3] https://github.com/podhrmic/JSBSim/blob/36de9ac63c959cef5d7b2c56fb49c1a57fd… https://github.com/tmbdev/iuprlab/blob/239918b5ec0f8deecbc7c2ec1283a837d11a… https://github.com/wcs211/BEM-3D-Python/blob/874aaeffc3dac5f698f875478c3acc… https://github.com/neobonzi/SoundPlagiarism/blob/7cff7f0145217bffb3a3cebd59… -- Nathaniel J. Smith -- https://vorpus.org

3 5

Reminder: 3.5.3 rc1 and 3.4.6 rc1 tagged tomorrow
by Larry Hastings 31 Dec '16

31 Dec '16

Just a reminder: I'll be tagging 3.5.3 rc1 and 3.4.6 rc1 tomorrow, Jan 1 2017, sometime between 24 and 36 hours from now. Please work quickly if there's anything you need to get in to either of those releases. I'm hoping that, for once, there are literally no code changes between rc1 and final. Best wishes for a happy new year, //arry/

1 0

Document C API that is not part of the limited API
by Serhiy Storchaka 31 Dec '16

31 Dec '16

From the documentation: https://docs.python.org/3/c-api/stable.html In the C API documentation, API elements that are not part of the limited API are marked as "Not part of the limited API." But they don't. I prepared a sample patch that adds the notes to Unicode Objects and Codecs C API (http://bugs.python.org/issue29086). I'm going to add them to all C API. What are your though about formatting the note? Should it be before the description, after the description, but before the "deprecated" directive (as in the patch), or after the first paragraph of the description? Should it be on the separate line or be appended at the end of the previous paragraph, or starts the first paragraph (if before the description)? May be introduce a special directive for it?

5 5

Summary of Python tracker Issues
by Python tracker 30 Dec '16

30 Dec '16

ACTIVITY SUMMARY (2016-12-23 - 2016-12-30) Python tracker at http://bugs.python.org/ To view or respond to any of the issues listed below, click on the issue. Do NOT respond to this message. Issues counts and deltas: open 5663 (+11) closed 35208 (+49) total 40871 (+60) Open issues with patches: 2449 Issues opened (32) ================== #28871: Destructor of ElementTree.Element is recursive http://bugs.python.org/issue28871 reopened by haypo #29057: Compiler failure on Mac OS X - sys/random.h http://bugs.python.org/issue29057 opened by Pam.McANulty #29058: Mark new limited C API http://bugs.python.org/issue29058 opened by serhiy.storchaka #29059: Windows: Python not using ANSI compatible console http://bugs.python.org/issue29059 opened by joseph.hackman #29062: hashlib documentation link error http://bugs.python.org/issue29062 opened by frankmillman #29063: Fixed timemodule compile warnings. http://bugs.python.org/issue29063 opened by Decorater #29067: Source archive: wrong directory attributes http://bugs.python.org/issue29067 opened by amig #29070: Integration tests for pty.spawn on Linux and all other platfor http://bugs.python.org/issue29070 opened by Cornelius Diekmann #29075: Remove Windows Vista support http://bugs.python.org/issue29075 opened by steve.dower #29076: Python 3.6 installer doesn't update "python3" shell command http://bugs.python.org/issue29076 opened by elias #29077: build failure when enabling dtrace on FreeBSD http://bugs.python.org/issue29077 opened by swills #29081: time.strptime() return wrong result http://bugs.python.org/issue29081 opened by hywl51 #29082: In 2.7.13, _ctypes.LoadLibrary no longer accepts Unicode objec http://bugs.python.org/issue29082 opened by Chi Hsuan Yen #29083: Readd PyArg_VaParse to the stable API http://bugs.python.org/issue29083 opened by serhiy.storchaka #29084: C API of OrderedDict http://bugs.python.org/issue29084 opened by serhiy.storchaka #29086: Document C API that is not part of the limited API http://bugs.python.org/issue29086 opened by serhiy.storchaka #29090: python34.dll crash http://bugs.python.org/issue29090 opened by MikeH #29092: Sync os.stat's doc and doc string http://bugs.python.org/issue29092 opened by xiang.zhang #29093: Windows launcher breaks history in Git Bash http://bugs.python.org/issue29093 opened by evan_ #29094: Regression in zipfile writing in 2.7.13 http://bugs.python.org/issue29094 opened by Peter Ebden #29096: Signal Handlers reliably cause UnboundLocalErrors http://bugs.python.org/issue29096 opened by Ted Meyer #29097: datetime.fromtimestamp(t) when 0 <= t <= 86399 fails on Python http://bugs.python.org/issue29097 opened by pekka.klarck #29098: document minimum sqlite version http://bugs.python.org/issue29098 opened by carlwgeorge #29099: sqlite3 timestamp converter cannot handle timezone http://bugs.python.org/issue29099 opened by bozo.kopic #29100: Core dump / OverflowError for datetime.fromtimestamp with over http://bugs.python.org/issue29100 opened by Jordon Phillips #29102: Add an id field to PyInterpreterState. http://bugs.python.org/issue29102 opened by eric.snow #29104: Left bracket remains in format string result when '\' preceeds http://bugs.python.org/issue29104 opened by Jim Fasarakis-Hilliard #29105: code or doc improvement for logging.handlers.RotatingFileHandl http://bugs.python.org/issue29105 opened by redstone-cold #29107: traceback module incorrectly formats args-less syntax errors http://bugs.python.org/issue29107 opened by Naftali.Harris #29108: Python 3.6.0 multiprocessing map_async callback http://bugs.python.org/issue29108 opened by Jose Miguel Colella #29110: [patch] Fix file object leak in `aifc.open` when given invalid http://bugs.python.org/issue29110 opened by azhang #29113: modulefinder no longer finds all required modules for Python i http://bugs.python.org/issue29113 opened by adamwill Most recent 15 issues with no replies (15) ========================================== #29113: modulefinder no longer finds all required modules for Python i http://bugs.python.org/issue29113 #29110: [patch] Fix file object leak in `aifc.open` when given invalid http://bugs.python.org/issue29110 #29107: traceback module incorrectly formats args-less syntax errors http://bugs.python.org/issue29107 #29105: code or doc improvement for logging.handlers.RotatingFileHandl http://bugs.python.org/issue29105 #29100: Core dump / OverflowError for datetime.fromtimestamp with over http://bugs.python.org/issue29100 #29098: document minimum sqlite version http://bugs.python.org/issue29098 #29094: Regression in zipfile writing in 2.7.13 http://bugs.python.org/issue29094 #29092: Sync os.stat's doc and doc string http://bugs.python.org/issue29092 #29086: Document C API that is not part of the limited API http://bugs.python.org/issue29086 #29083: Readd PyArg_VaParse to the stable API http://bugs.python.org/issue29083 #29081: time.strptime() return wrong result http://bugs.python.org/issue29081 #29075: Remove Windows Vista support http://bugs.python.org/issue29075 #29070: Integration tests for pty.spawn on Linux and all other platfor http://bugs.python.org/issue29070 #29067: Source archive: wrong directory attributes http://bugs.python.org/issue29067 #29063: Fixed timemodule compile warnings. http://bugs.python.org/issue29063 Most recent 15 issues waiting for review (15) ============================================= #29110: [patch] Fix file object leak in `aifc.open` when given invalid http://bugs.python.org/issue29110 #29104: Left bracket remains in format string result when '\' preceeds http://bugs.python.org/issue29104 #29102: Add an id field to PyInterpreterState. http://bugs.python.org/issue29102 #29099: sqlite3 timestamp converter cannot handle timezone http://bugs.python.org/issue29099 #29097: datetime.fromtimestamp(t) when 0 <= t <= 86399 fails on Python http://bugs.python.org/issue29097 #29092: Sync os.stat's doc and doc string http://bugs.python.org/issue29092 #29086: Document C API that is not part of the limited API http://bugs.python.org/issue29086 #29082: In 2.7.13, _ctypes.LoadLibrary no longer accepts Unicode objec http://bugs.python.org/issue29082 #29070: Integration tests for pty.spawn on Linux and all other platfor http://bugs.python.org/issue29070 #29063: Fixed timemodule compile warnings. http://bugs.python.org/issue29063 #29062: hashlib documentation link error http://bugs.python.org/issue29062 #29059: Windows: Python not using ANSI compatible console http://bugs.python.org/issue29059 #29058: Mark new limited C API http://bugs.python.org/issue29058 #29057: Compiler failure on Mac OS X - sys/random.h http://bugs.python.org/issue29057 #29054: pty.py: pty.spawn hangs after client disconnect over nc (netca http://bugs.python.org/issue29054 Top 10 most discussed issues (10) ================================= #23903: Generate PC/python3.def by scraping headers http://bugs.python.org/issue23903 15 msgs #29048: Coverage influence tests, make some of them fail http://bugs.python.org/issue29048 14 msgs #29062: hashlib documentation link error http://bugs.python.org/issue29062 13 msgs #29102: Add an id field to PyInterpreterState. http://bugs.python.org/issue29102 13 msgs #29058: Mark new limited C API http://bugs.python.org/issue29058 10 msgs #29057: Compiler failure on Mac OS X - sys/random.h http://bugs.python.org/issue29057 9 msgs #29104: Left bracket remains in format string result when '\' preceeds http://bugs.python.org/issue29104 9 msgs #29097: datetime.fromtimestamp(t) when 0 <= t <= 86399 fails on Python http://bugs.python.org/issue29097 8 msgs #29099: sqlite3 timestamp converter cannot handle timezone http://bugs.python.org/issue29099 8 msgs #26382: List object memory allocator http://bugs.python.org/issue26382 7 msgs Issues closed (49) ================== #9770: curses.ascii.isblank() function is broken. It confuses backspa http://bugs.python.org/issue9770 closed by serhiy.storchaka #13051: Infinite recursion in curses.textpad.Textbox http://bugs.python.org/issue13051 closed by serhiy.storchaka #14483: inspect.getsource fails to read a file of only comments http://bugs.python.org/issue14483 closed by r.david.murray #25778: winreg.EnumValue does not truncate strings correctly http://bugs.python.org/issue25778 closed by steve.dower #26758: Unnecessary format string handling for no argument slot wrappe http://bugs.python.org/issue26758 closed by inada.naoki #28427: WeakValueDictionary next bug (with multithreading) http://bugs.python.org/issue28427 closed by pitrou #28446: pyvenv generates malformed hashbangs for scripts http://bugs.python.org/issue28446 closed by vinay.sajip #28675: about PEP 528 / PEP 529 http://bugs.python.org/issue28675 closed by steve.dower #28902: 3.6.0rc1 installer fails to install / uninstall. http://bugs.python.org/issue28902 closed by steve.dower #28954: Incorrect EBNF rule of keywords_arguments http://bugs.python.org/issue28954 closed by martin.panter #28960: Small typo in Thread.join docs http://bugs.python.org/issue28960 closed by martin.panter #28998: Unifying Long Integers and Integers in 2.7 http://bugs.python.org/issue28998 closed by serhiy.storchaka #29003: sqlite3: can't run VACUUM on Python 3.6 http://bugs.python.org/issue29003 closed by berker.peksag #29004: binascii.crc_hqx() implements CRC-CCITT http://bugs.python.org/issue29004 closed by martin.panter #29025: random.seed() relation to hash() function and its determinism http://bugs.python.org/issue29025 closed by rhettinger #29037: Python 2.7.13 prints version header and exits immediately on W http://bugs.python.org/issue29037 closed by steve.dower #29047: Where are the test results stored? http://bugs.python.org/issue29047 closed by patriki #29049: Lazy GC tracking frame http://bugs.python.org/issue29049 closed by inada.naoki #29055: random.choice on empty sequence should hide previous exception http://bugs.python.org/issue29055 closed by rhettinger #29056: logging.Formatter doesn't respect more than one formatExceptio http://bugs.python.org/issue29056 closed by vinay.sajip #29060: Changing the installation location still adds AppData filepath http://bugs.python.org/issue29060 closed by steve.dower #29061: secrets.randbelow(-1) hangs http://bugs.python.org/issue29061 closed by rhettinger #29064: Package numpy can't be used normally http://bugs.python.org/issue29064 closed by xiang.zhang #29065: SSL module problem on Python 3.6.0 and macOS Sierra http://bugs.python.org/issue29065 closed by ned.deily #29066: PIP doesn't honor --trusted-host or --cert options http://bugs.python.org/issue29066 closed by ned.deily #29068: Fix example code for PyErr_Fetch http://bugs.python.org/issue29068 closed by serhiy.storchaka #29069: Default PyPI URL in docs is not what is really in code http://bugs.python.org/issue29069 closed by berker.peksag #29071: IDLE doesn't highlight f-strings properly http://bugs.python.org/issue29071 closed by terry.reedy #29072: the message of help(os.environ.setdefault) have some error http://bugs.python.org/issue29072 closed by r.david.murray #29073: bytearray.__mod__() truncates on first \x00 http://bugs.python.org/issue29073 closed by serhiy.storchaka #29074: repr doesn't give full result for this re math result http://bugs.python.org/issue29074 closed by mrabarnett #29078: Example in Section 8.1.5 time Objects is broken http://bugs.python.org/issue29078 closed by xiang.zhang #29079: pathlib.resolve() causes infinite loop on Windows http://bugs.python.org/issue29079 closed by steve.dower #29080: unnecessary hg required for build version 3.6 on Windows http://bugs.python.org/issue29080 closed by steve.dower #29085: Python 3.6 on Windows doesn't seed Random() well enough http://bugs.python.org/issue29085 closed by python-dev #29087: UCS4 support functions are not implemented http://bugs.python.org/issue29087 closed by serhiy.storchaka #29088: Inconsistent use of underscore in names that start with "is" http://bugs.python.org/issue29088 closed by r.david.murray #29089: dictionary keys described incorrectly in tutorial http://bugs.python.org/issue29089 closed by rhettinger #29091: Python 3.5+ socket.socketpair fallback incorrectly implemented http://bugs.python.org/issue29091 closed by benjamin.peterson #29095: Compiling Python 3.6 from source on MacOS X Sierra http://bugs.python.org/issue29095 closed by ned.deily #29101: Nested lambdas in setattr() lose context in Python 2.7 http://bugs.python.org/issue29101 closed by benjamin.peterson #29103: Make enum.py pep8 compliant http://bugs.python.org/issue29103 closed by rhettinger #29106: get-pip.py fails with Python 3.6 embed Windows http://bugs.python.org/issue29106 closed by ammar2 #29109: Small doc improvements for tracemalloc http://bugs.python.org/issue29109 closed by haypo #29111: Strange signature for memoryview constructor http://bugs.python.org/issue29111 closed by skrah #29112: questionable wording in sequences documentation http://bugs.python.org/issue29112 closed by xiang.zhang #29114: __class__ not exists in the method which bounded by types.Meth http://bugs.python.org/issue29114 closed by ncoghlan #29115: distutils.core.setup does not let people set 'bugtrack_url'. http://bugs.python.org/issue29115 closed by berker.peksag #1446619: extended slice behavior inconsistent with docs http://bugs.python.org/issue1446619 closed by martin.panter

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Python-Dev December 2016