Mailman 3 February 2014 - Python-Dev

[RELEASED] Python 3.4.0 release candidate 2 is now available
by Larry Hastings Feb. 24, 2014

Feb. 24, 2014

On behalf of the Python development team, I'm delighted to announce the second and final release candidate of Python 3.4. This is a preview release, and its use is not recommended for production settings. Python 3.4 includes a range of improvements of the 3.x series, including hundreds of small improvements and bug fixes. Major new features and changes in the 3.4 release series include: * PEP 428, a "pathlib" module providing object-oriented filesystem paths * PEP 435, a standardized "enum" module * PEP 436, a build enhancement that will help generate introspection information for builtins * PEP 442, improved semantics for object finalization * PEP 443, adding single-dispatch generic functions to the standard library * PEP 445, a new C API for implementing custom memory allocators * PEP 446, changing file descriptors to not be inherited by default in subprocesses * PEP 450, a new "statistics" module * PEP 451, standardizing module metadata for Python's module import system * PEP 453, a bundled installer for the *pip* package manager * PEP 454, a new "tracemalloc" module for tracing Python memory allocations * PEP 456, a new hash algorithm for Python strings and binary data * PEP 3154, a new and improved protocol for pickled objects * PEP 3156, a new "asyncio" module, a new framework for asynchronous I/O Python 3.4 is now in "feature freeze", meaning that no new features will be added. The final release is projected for mid-March 2014. The python.org web site has recently been updated to something completely new, and I'm having some difficulty updating it. For now I've made Python 3.4.0rc2 available on the legacy web site: http://legacy.python.org/download/releases/3.4.0/ Once I can update the new web site, Python 3.4.0rc2 will be available here: http://python.org/download/releases/ (I'm not sure what the final URL will be, but you'll see it listed on that page.) Please consider trying Python 3.4.0rc2 with your code and reporting any new issues you notice to: http://bugs.python.org/ Enjoy! -- Larry Hastings, Release Manager larry at hastings.org (on behalf of the entire python-dev team and 3.4's contributors)

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[RELEASED] Python 3.3.5 release candidate 1
by Georg Brandl Feb. 23, 2014

Feb. 23, 2014

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On behalf of the Python development team, I'm happy to announce the release of Python 3.3.5, release candidate 1. Python 3.3.5 includes a fix for a regression in zipimport in 3.3.4 (see http://bugs.python.org/issue20621) and a few other bugs. Python 3.3 includes a range of improvements of the 3.x series, as well as easier porting between 2.x and 3.x. In total, almost 500 API items are new or improved in Python 3.3. For a more extensive list of changes in the 3.3 series, see http://docs.python.org/3.3/whatsnew/3.3.html To download Python 3.3.5 visit: http://www.python.org/download/releases/3.3.5/ This is a preview release, please report any bugs to http://bugs.python.org/ The final release is scheduled one week from now. Enjoy! - -- Georg Brandl, Release Manager georg at python.org (on behalf of the entire python-dev team and 3.3's contributors) -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iEYEARECAAYFAlMKIPEACgkQN9GcIYhpnLCjXACfQwbC/eD/lhKAZ+XCwTwYPVWj GMwAnjWkbdk7hqsKoh12EiagpGApEPSA =2BCx -----END PGP SIGNATURE-----

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One more cherry-pick request for 3.4.0 that I'd like a little public debate on
by Larry Hastings Feb. 23, 2014

Feb. 23, 2014

Victor has asked me to cherry-pick 180e4b678003: http://bugs.python.org/issue20320 (original issue) http://hg.python.org/cpython/rev/180e4b678003/ (checkin into trunk) http://bugs.python.org/issue20646 (cherry-pick request) This revision changes the rounding behavior of fractional-second timeouts for select.select and select.kqueue. I don't have enough context to judge whether or not this is bad enough to warrant cherry-picking, and the discussion on the issue didn't seem to come to a firm consensus. Can I get some opinions on this? FWIW, I'm going to cut the next preview in a few minutes, and this won't be in it, but I don't actually tag until most of a day from now. //arry/

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Tangent on class level scoping rules (was Re: PEP 463: Exception-catching expressions)
by Nick Coghlan Feb. 22, 2014

Feb. 22, 2014

On 22 February 2014 00:22, Rob Cliffe <rob.cliffe(a)btinternet.com> wrote: > Thanks for looking into this Nick. > I confess I don't entirely understand the technical argument (my > understanding breaks down at "the subexpressions can't see the class level > variables", but I don't want to waste anybody's time expecting an > explanation, I can always look into it myself) It's a relatively arcane scoping rule that only matters if you have non-trivial logic at class scope. The vast majority of Python programmers will never have to care, because they do the typical thing and their class bodies consist almost entirely of function definitions and relatively simple assignment statements. However, it's something that expression level name binding proposals need to take into account if they want to avoid side effects on the containing scope. Python's scoping rules are deliberately designed so that methods *can't* see class attributes directly, they have to access them via their first argument or the magic __class__ variable (Py3 only for the latter). For example: >>> class C: ... attr = "Hello" ... def m(self): ... print(self.attr) ... print(attr) ... >>> C().m() Hello Traceback (most recent call last): File "<stdin>", line 1, in <module> File "<stdin>", line 5, in m NameError: global name 'attr' is not defined The trick that makes it relevant here is that the "hidden" iteration variable in comprehensions is implemented by creating an implicit closure and then calling it. From the point of view of the scoping rules, that implicit closure behaves the same way as any other method definition, so most of the subexpressions can't see the class variables. The sole exception is the outermost iterator expression, because that is evaluated in the containing scope and then passed to the closure as an argument (this is all based on the way generator expressions work, and those *have* to be a closure, because they need to run in their own completely independent frame). As Chris later noted, you likely *could* still implement expression local name binding for an except expression without a full closure, it would just be rather difficult. Cheers, Nick. -- Nick Coghlan | ncoghlan(a)gmail.com | Brisbane, Australia

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Fourth (final?) preview of rc2 is up
by Larry Hastings Feb. 22, 2014

Feb. 22, 2014

Only three new revisions this time. Victor must have taken the day off! //arry/

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GSOC 2014
by NAVNEET SUMAN Feb. 22, 2014

Feb. 22, 2014

Hi, This is my first year in gsoc. I have been working with python and django from quite a time. One of the Gsoc proposed ideas drew my attention and i would surely like to work on that. I would like to work for creating a extension for idle to integrate PEP8, what are the prerequisites . I have been studying the PEP8 code past a week. This might be useful for a quick start to this project. Please guide. -- Thanks and Regards, Navneet suman, IIIT-Allahabad +91-9305612151

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Python 3.4: Cherry-picking into rc2 and final
by Larry Hastings Feb. 22, 2014

Feb. 22, 2014

Right now we're in the "release candidate" phase of 3.4. 3.4.0 rc1 has been released, and the next release will be rc2. You might think that anything you check in to the "default" branch in Python trunk will go into 3.4.0 rc2, and after that ships, checkins would go into 3.4.0 final. Ho ho ho! That's not true! Instead, anything checked in to "default" between my last revision for "rc1" (e64ae8b82672) and 3.4.0 final will by default go into 3.4.1. Only fixes that I cherry-pick into my local branch will go into 3.4.0 rc2 and final. And my local branch will remain private until 3.4.0 final ships! If you have a Terribly Important Fix That Must Go Into 3.4.0 rc2 or final, please go to the issue tracker and create a new issue with the following attributes: The title should start with "3.4 cherry-pick: " followed by the revision id and a short summary example: "3.4 cherry-pick: b328f8ccbccf __getnewargs__ fix" The version should be "Python 3.4" The assignee should be "larry" The priority should be "release blocker" The comment should *also* contain the revision id (the tracker will turn it into a link) I'm also working on automatically publishing the merged/unmerged revision status to a web page. You can see a mock-up here: http://www.midwinter.com/~larry/3.4.merge.status.html The page is marked "beta" because it doesn't have real data yet--I'm still experimenting with my automation, so I haven't created the real 3.4 local branch yet. Again, just to be crystal-clear: the revisions marked "merged" on that page are just experiments, they aren't actually merged for 3.4. Once I'm ready for real merging, I'll remove the beta warning. (By the way: on that page, clicking on a revision takes you to the revision web page. Clicking on the first line of the comment expands it to show the complete comment.) Please use your best judgment before asking that a revision be cherry-picked into 3.4.0. Our goal in the release candidate phase is to stabilize Python, and to do that we must stop changing it. Only important interface changes, new features, or bugfixes should be checked in now, and preferably they should be low-risk. Cheers, //arry/

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Summary of Python tracker Issues
by Python tracker Feb. 21, 2014

Feb. 21, 2014

ACTIVITY SUMMARY (2014-02-14 - 2014-02-21) 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 4558 (+34) closed 27937 (+62) total 32495 (+96) Open issues with patches: 2059 Issues opened (60) ================== #10510: distutils upload/register should use CRLF in HTTP requests http://bugs.python.org/issue10510 reopened by eric.araujo #20628: csv.DictReader http://bugs.python.org/issue20628 opened by rogererens #20629: Python ctypes BigEndianStructure bitfield assignment misbehavi http://bugs.python.org/issue20629 opened by Alan.Ning #20630: Add sorting helpers for collections containing None values http://bugs.python.org/issue20630 opened by ncoghlan #20631: python readline module crashing on NULL access http://bugs.python.org/issue20631 opened by tfiala #20632: Define a new __key__ protocol http://bugs.python.org/issue20632 opened by ncoghlan #20633: SystemError: Parent module 'multiprocessing' not loaded, canno http://bugs.python.org/issue20633 opened by Amr.Ali #20635: Fix the grid geometry manager and add tests for geometry manag http://bugs.python.org/issue20635 opened by serhiy.storchaka #20636: Better repr for tkinter widgets http://bugs.python.org/issue20636 opened by serhiy.storchaka #20637: Support key-sharing dictionaries in subclasses http://bugs.python.org/issue20637 opened by pingebretson #20639: pathlib.PurePath.with_suffix() does not allow removing the suf http://bugs.python.org/issue20639 opened by july #20640: Adds idle test for configHelpSourceEdit http://bugs.python.org/issue20640 opened by sahutd #20641: Python installer needs elevated rights to install pip http://bugs.python.org/issue20641 opened by poke #20642: Enhance deepcopy-ing for tuples http://bugs.python.org/issue20642 opened by Claudiu.Popa #20643: Strange dot in documentation (after generator.close) http://bugs.python.org/issue20643 opened by rutsky #20644: OS X installer build broken by changes to documentation build http://bugs.python.org/issue20644 opened by ned.deily #20646: 3.4 cherry-pick: 180e4b678003 select and kqueue round the time http://bugs.python.org/issue20646 opened by haypo #20648: 3.4 cherry-pick: multiple changesets for asyncio http://bugs.python.org/issue20648 opened by haypo #20650: asyncio.BaseEventLoop.run_in_executor docs have awkward wordin http://bugs.python.org/issue20650 opened by brett.cannon #20653: Pickle enums by name http://bugs.python.org/issue20653 opened by serhiy.storchaka #20657: OpenBSD: Merge patches http://bugs.python.org/issue20657 opened by haypo #20658: os.environ.clear() fails with empty keys (posix.unsetenv) http://bugs.python.org/issue20658 opened by blueyed #20659: Want to make a class method a property by combining decorators http://bugs.python.org/issue20659 opened by the.mulhern #20660: Starting a second multiprocessing.Manager causes INCREF on all http://bugs.python.org/issue20660 opened by mythsmith #20662: Pydoc doesn't escape parameter defaults in html http://bugs.python.org/issue20662 opened by serhiy.storchaka #20663: Introduce exception argument to iter http://bugs.python.org/issue20663 opened by cool-RR #20664: _findLib_crle and _get_soname broken on latest SunOS 5.11 http://bugs.python.org/issue20664 opened by rygorde4 #20668: Remove dependency on tests.txt when running test_asyncio suite http://bugs.python.org/issue20668 opened by vajrasky #20669: OpenBSD: socket.recvmsg tests fail with OSError: [Errno 40] Me http://bugs.python.org/issue20669 opened by haypo #20671: test_create_at_shutdown_with_encoding() of test_io hangs on "S http://bugs.python.org/issue20671 opened by haypo #20674: Update comments in dictobject.c http://bugs.python.org/issue20674 opened by rhettinger #20677: Minor typo in enum docs http://bugs.python.org/issue20677 opened by flashk #20678: re does not allow back references in {} matching operator http://bugs.python.org/issue20678 opened by hardkrash #20679: 3.4 cherry-pick: 587fd4b91120 improve Enum subclass behavior http://bugs.python.org/issue20679 opened by ethan.furman #20680: Pickle socket enums by names http://bugs.python.org/issue20680 opened by serhiy.storchaka #20683: [doc] Ease comprehension of section 9.2 of docs for Python 2 a http://bugs.python.org/issue20683 opened by krichter #20686: Confusing statement http://bugs.python.org/issue20686 opened by Daniel.U..Thibault #20687: Change in expectedFailure breaks testtools http://bugs.python.org/issue20687 opened by barry #20689: socket.AddressFamily is absent in html pydoc http://bugs.python.org/issue20689 opened by serhiy.storchaka #20690: IDLE Indents convert to spaces and then throws error http://bugs.python.org/issue20690 opened by Justin.Barker #20691: inspect.signature: Consider exposing 'follow_wrapper_chains' o http://bugs.python.org/issue20691 opened by yselivanov #20692: Tutorial section 9.4 and FAQ: how to call a method on an int http://bugs.python.org/issue20692 opened by Jon.Shemitz #20693: Sidebar scrolls down 2x as fast as page content http://bugs.python.org/issue20693 opened by nicktimko #20699: Behavior of ZipFile with file-like object and BufferedWriter. http://bugs.python.org/issue20699 opened by Henning.von.Bargen #20701: warning in compileall.rst http://bugs.python.org/issue20701 opened by pitrou #20702: warning in cmdline.rst http://bugs.python.org/issue20702 opened by pitrou #20703: RuntimeError caused by lazy imports in pdb http://bugs.python.org/issue20703 opened by xdegaye #20705: distutils.extension.Extension with empty 'sources' list http://bugs.python.org/issue20705 opened by remram #20708: commands has no "RANDOM" environment? http://bugs.python.org/issue20708 opened by addict2tux #20709: os.utime(path_to_directory): wrong documentation for Windows. http://bugs.python.org/issue20709 opened by jgehrcke #20712: Make inspect agnostic about whether functions are implemented http://bugs.python.org/issue20712 opened by larry #20714: Allow for ]]> in CDATA in minidom http://bugs.python.org/issue20714 opened by arturcz #20715: 3.4 cherry-pick: 2000c27ebe80 inspect: Fix getfullargspec to s http://bugs.python.org/issue20715 opened by yselivanov #20717: test_4_daemon_threads() fails randomly on "x86 Windows Server http://bugs.python.org/issue20717 opened by haypo #20718: OpenBSD/AIX: tests passing a file descriptor with sendmsg/recv http://bugs.python.org/issue20718 opened by haypo #20719: test_robotparser failure on "SPARC Solaris 10 (cc%2C 64b) [SB] http://bugs.python.org/issue20719 opened by haypo #20720: test_create_server() of test_asyncio failure on "x86 Windows S http://bugs.python.org/issue20720 opened by haypo #20721: 3.4 cherry-pick: 005d0678f93c Update pip to 1.5.4 http://bugs.python.org/issue20721 opened by dstufft #20722: newline is (partially) independent of universal newlines; need http://bugs.python.org/issue20722 opened by Devin Jeanpierre #20723: Make test (Python 3.3.4) http://bugs.python.org/issue20723 opened by datienzalopez Most recent 15 issues with no replies (15) ========================================== #20721: 3.4 cherry-pick: 005d0678f93c Update pip to 1.5.4 http://bugs.python.org/issue20721 #20720: test_create_server() of test_asyncio failure on "x86 Windows S http://bugs.python.org/issue20720 #20715: 3.4 cherry-pick: 2000c27ebe80 inspect: Fix getfullargspec to s http://bugs.python.org/issue20715 #20709: os.utime(path_to_directory): wrong documentation for Windows. http://bugs.python.org/issue20709 #20705: distutils.extension.Extension with empty 'sources' list http://bugs.python.org/issue20705 #20703: RuntimeError caused by lazy imports in pdb http://bugs.python.org/issue20703 #20702: warning in cmdline.rst http://bugs.python.org/issue20702 #20701: warning in compileall.rst http://bugs.python.org/issue20701 #20699: Behavior of ZipFile with file-like object and BufferedWriter. http://bugs.python.org/issue20699 #20691: inspect.signature: Consider exposing 'follow_wrapper_chains' o http://bugs.python.org/issue20691 #20690: IDLE Indents convert to spaces and then throws error http://bugs.python.org/issue20690 #20689: socket.AddressFamily is absent in html pydoc http://bugs.python.org/issue20689 #20683: [doc] Ease comprehension of section 9.2 of docs for Python 2 a http://bugs.python.org/issue20683 #20680: Pickle socket enums by names http://bugs.python.org/issue20680 #20674: Update comments in dictobject.c http://bugs.python.org/issue20674 Most recent 15 issues waiting for review (15) ============================================= #20714: Allow for ]]> in CDATA in minidom http://bugs.python.org/issue20714 #20705: distutils.extension.Extension with empty 'sources' list http://bugs.python.org/issue20705 #20680: Pickle socket enums by names http://bugs.python.org/issue20680 #20677: Minor typo in enum docs http://bugs.python.org/issue20677 #20669: OpenBSD: socket.recvmsg tests fail with OSError: [Errno 40] Me http://bugs.python.org/issue20669 #20668: Remove dependency on tests.txt when running test_asyncio suite http://bugs.python.org/issue20668 #20658: os.environ.clear() fails with empty keys (posix.unsetenv) http://bugs.python.org/issue20658 #20653: Pickle enums by name http://bugs.python.org/issue20653 #20642: Enhance deepcopy-ing for tuples http://bugs.python.org/issue20642 #20640: Adds idle test for configHelpSourceEdit http://bugs.python.org/issue20640 #20639: pathlib.PurePath.with_suffix() does not allow removing the suf http://bugs.python.org/issue20639 #20637: Support key-sharing dictionaries in subclasses http://bugs.python.org/issue20637 #20636: Better repr for tkinter widgets http://bugs.python.org/issue20636 #20635: Fix the grid geometry manager and add tests for geometry manag http://bugs.python.org/issue20635 #20631: python readline module crashing on NULL access http://bugs.python.org/issue20631 Top 10 most discussed issues (10) ================================= #20648: 3.4 cherry-pick: multiple changesets for asyncio http://bugs.python.org/issue20648 50 msgs #20653: Pickle enums by name http://bugs.python.org/issue20653 27 msgs #20628: csv.DictReader http://bugs.python.org/issue20628 17 msgs #19748: test_time failures on AIX http://bugs.python.org/issue19748 12 msgs #20658: os.environ.clear() fails with empty keys (posix.unsetenv) http://bugs.python.org/issue20658 11 msgs #20679: 3.4 cherry-pick: 587fd4b91120 improve Enum subclass behavior http://bugs.python.org/issue20679 10 msgs #19081: zipimport behaves badly when the zip file changes while the pr http://bugs.python.org/issue19081 9 msgs #20608: 'SyntaxError: invalid token' is unfriendly http://bugs.python.org/issue20608 9 msgs #20570: Bundle pip 1.5.3 in Python 3.4rc2 http://bugs.python.org/issue20570 7 msgs #20671: test_create_at_shutdown_with_encoding() of test_io hangs on "S http://bugs.python.org/issue20671 7 msgs Issues closed (61) ================== #9009: Improve quality of Python/dtoa.c http://bugs.python.org/issue9009 closed by mark.dickinson #12211: Better document math.copysign behavior. http://bugs.python.org/issue12211 closed by akuchling #13663: pootle.python.org is outdated. http://bugs.python.org/issue13663 closed by benjamin.peterson #13720: argparse print_help() fails if COLUMNS is set to a low value http://bugs.python.org/issue13720 closed by serhiy.storchaka #16224: tokenize.untokenize() misbehaves when moved to "compatiblity m http://bugs.python.org/issue16224 closed by terry.reedy #19769: test_venv: test_with_pip() failure on "AMD64 Windows Server 20 http://bugs.python.org/issue19769 closed by haypo #19890: Typo in multiprocessing docs http://bugs.python.org/issue19890 closed by ezio.melotti #20080: Unused variable in Lib/sqlite3/test/factory.py http://bugs.python.org/issue20080 closed by python-dev #20221: #define hypot _hypot conflicts with existing definition http://bugs.python.org/issue20221 closed by zach.ware #20237: Ambiguous sentence in document of xml package. http://bugs.python.org/issue20237 closed by akuchling #20241: Bad reference to RFC in document of ipaddress? http://bugs.python.org/issue20241 closed by berker.peksag #20497: Unclear word in socket document. http://bugs.python.org/issue20497 closed by python-dev #20507: TypeError from str.join has no message http://bugs.python.org/issue20507 closed by python-dev #20510: Test cases in test_sys don't match the comments http://bugs.python.org/issue20510 closed by zach.ware #20511: asyncio: StreamReader should use bytearray for its internal bu http://bugs.python.org/issue20511 closed by haypo #20564: locks cannot be interrupted on OpenBSD http://bugs.python.org/issue20564 closed by haypo #20569: IDLE : Add clipboard history feature http://bugs.python.org/issue20569 closed by sahutd #20573: "built-in repr()" function link on the repr module documentati http://bugs.python.org/issue20573 closed by python-dev #20609: Always running kill_python breaks building x64 on 32-bit Windo http://bugs.python.org/issue20609 closed by zach.ware #20610: Documentation with two slashes in URL links to v2.6.5c2 http://bugs.python.org/issue20610 closed by benjamin.peterson #20616: Add tracemalloc.Traceback.format() method http://bugs.python.org/issue20616 closed by haypo #20621: Issue with zipimport in 3.3.4 and 3.4.0rc1 http://bugs.python.org/issue20621 closed by gregory.p.smith #20622: Python3.3 venv pip fails to run if path contains spaces http://bugs.python.org/issue20622 closed by eric.araujo #20625: Argument names in __annotations__ are not mangled for function http://bugs.python.org/issue20625 closed by yselivanov #20634: IDLE test : Typo in readme file http://bugs.python.org/issue20634 closed by ezio.melotti #20638: KeyError building the Python html doc with sphinx http://bugs.python.org/issue20638 closed by georg.brandl #20645: 3.4 cherry-pick: 1166b3321012 Revert changes of issue #19466 ( http://bugs.python.org/issue20645 closed by larry #20647: 3.4 cherry-pick: d50a95fab002 add tracemalloc.Traceback.format http://bugs.python.org/issue20647 closed by larry #20649: Minor grammatical mistake for asyncio dev docs http://bugs.python.org/issue20649 closed by python-dev #20651: 3.4 cherry-pick: 52ab9e1ff46a rolls back bad zipimport changes http://bugs.python.org/issue20651 closed by larry #20652: Example in asyncio task gives resource warning http://bugs.python.org/issue20652 closed by python-dev #20654: Pydoc (and help) fails with socket.AddressFamily http://bugs.python.org/issue20654 closed by serhiy.storchaka #20655: test_subprocess is not executed in python -m test.test_asyncio http://bugs.python.org/issue20655 closed by haypo #20656: OpenBSD: timeval.tv_sec type is long, not time_t http://bugs.python.org/issue20656 closed by python-dev #20661: 3.4 cherry-pick: eef7899ea7ab use system doc toolchain instead http://bugs.python.org/issue20661 closed by georg.brandl #20665: 3.4 cherry-pick: 400a8e4599d9 rename posix_close to avoid name http://bugs.python.org/issue20665 closed by larry #20666: asyncio/OpenBSD: make concurrent.futures dependency optional http://bugs.python.org/issue20666 closed by haypo #20667: asyncio: KqueueEventLoopTests.test_read_pty_output() of test_a http://bugs.python.org/issue20667 closed by haypo #20670: 3.4 cherry-pick: 2dd4922c9371 set line and column numbers for http://bugs.python.org/issue20670 closed by larry #20672: test_list() of test_tarfile fails on http://bugs.python.org/issue20672 closed by serhiy.storchaka #20673: asyncio: Add support for UNIX Domain Sockets. http://bugs.python.org/issue20673 closed by yselivanov #20675: 3.4 cherry-pick: 69d13cdc4eeb fix 64-bit build on 32-bit Windo http://bugs.python.org/issue20675 closed by larry #20676: 3.4 cherry-pick: a63327162063 Mangle __parameters in __annotat http://bugs.python.org/issue20676 closed by larry #20681: asyncio: New error handling API http://bugs.python.org/issue20681 closed by yselivanov #20682: test_create_ssl_unix_connection() of test_asyncio failed on "x http://bugs.python.org/issue20682 closed by python-dev #20684: inspect.getfullargspec (etc) incorrectly follows __wrapped__ c http://bugs.python.org/issue20684 closed by yselivanov #20685: 3.4 cherry pick: 9f76adbac8b7 better handling of missing SSL/T http://bugs.python.org/issue20685 closed by larry #20688: 3.4 cherry-pick: 65fb95578f94 inspect: Fix getfullargspec() to http://bugs.python.org/issue20688 closed by larry #20694: asyncio.docs: Document subprocess_exec and subprocess_shell http://bugs.python.org/issue20694 closed by yselivanov #20695: test_urllibnet.urlretrieveNetworkTests fails due to new python http://bugs.python.org/issue20695 closed by benjamin.peterson #20696: asyncio.docs: Document StreamReader an other streams module AP http://bugs.python.org/issue20696 closed by yselivanov #20697: 3.4 cherry-pick: 0399e842073a http://bugs.python.org/issue20697 closed by larry #20698: 3.4 cherry-pick: b328f8ccbccf pickle shouldn't look up dunder http://bugs.python.org/issue20698 closed by larry #20700: Docs sidebar scrolls strangely in 3.4 docs http://bugs.python.org/issue20700 closed by zach.ware #20704: asyncio: Implement debug API http://bugs.python.org/issue20704 closed by yselivanov #20706: asyncio.docs: Fix wording in 'this method returns a coroutine http://bugs.python.org/issue20706 closed by yselivanov #20707: 3.4 cherry-pick: bf413a97f1a9 fix conflicting hypot definition http://bugs.python.org/issue20707 closed by larry #20710: Make pydoc consistent about bound methods http://bugs.python.org/issue20710 closed by larry #20711: inspect.getfullargspec does not correctly work with builtin mo http://bugs.python.org/issue20711 closed by yselivanov #20713: 3.4 cherry-pick: d57df3f72715 Upgrade pip to 1.5.3 http://bugs.python.org/issue20713 closed by larry #20716: 3.4 cherry-pick: 5e73bb72662e pydoc shouldn't display "self" f http://bugs.python.org/issue20716 closed by larry

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Re: [Python-Dev] Tangent on class level scoping rules (was Re: PEP 463: Exception-catching expressions)
by Nick Coghlan Feb. 21, 2014

Feb. 21, 2014

Sorry folks, that was meant to go to python-ideas, not python-dev. I've been so used to the PEP 463 threads being on python-ideas, I missed that this was the python-dev one :) Cheers, Nick.

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cherry pick a change to Enum
by Ethan Furman Feb. 21, 2014

Feb. 21, 2014

Greetings, all! Larry asked me to bring this to PyDev, so here it is. The issues involved are: http://bugs.python.org/issue20534 -> already in RC1 http://bugs.python.org/issue20653 -> hoping to get cherry-picked Background ========== When I put Enum together, my knowledge of pickle and its protocols was dreadfully weak. As a result, I didn't make the best choice in implementing it [1]. Just before RC1 was cut, Serhiy discovered a problem with pickling Enums at protocol four, and with his help I fixed that (this is the part that is already in RC1). This fix consisted primarily of adding a __reduce_ex__ to the Enum class, and also checking for all the pickle protocols in a mixed-in type [2], but I left __getnewargs__ in. Not only that, and worse, I wasn't checking to see if the new subclass had its own __getnewargs__ or __reduce_ex__ before I invalidated the class for pickling [3]. This means that even though a subclass could have its own __reduce_ex__ to make pickling/unpickling possible, it will be ignored. Problem ======= All the previous changes to disallow something have been for strategic reasons (the usual ones being either consistency, or "it doesn't make sense for an enum member/class to behave that way"), but this is effectively disallowing a user to specify how their enums should be pickled, and I am unaware of any reason why this should be. Discussion ========== Is there a valid reason to not allow a user to modify how their enums are pickled? If not, should we put the change in RC2 / Final? The main reason I'm pushing for this is that Enum is still new, but after 3.4.0 is cut we then have to deal with backwards compatibility issues. Thanks for your time and thoughts. -- ~Ethan~ [1] I chose __getnewargs__, with the result that originally Enum didn't support pickle protocols 0 or 1, and when 4 was added later it had trouble with some types of Enum subclasses (tuples, to be exact). [2] Those protocol methods being __reduce__, __reduce_ex__, __getnewargs__, and __getnewargs_ex__. [3] This logic error has been there from the beginning, it did not sneak in in the last patch before RC1.

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