Python-Dev May 2017

python-dev@python.org

79 participants
46 discussions

PEP 484 update proposal: annotating decorated declarations
by Guido van Rossum 02 Jun '17

02 Jun '17

There's a PR to the peps proposal here: https://github.com/python/peps/pull/242 The full text of the current proposal is below. The motivation for this is that for complex decorators, even if the type checker can figure out what's going on (by taking the signature of the decorator into account), it's sometimes helpful to the human reader of the code to be reminded of the type after applying the decorators (or a stack thereof). Much discussion can be found in the PR. Note that we ended up having `Callable` in the type because there's no rule that says a decorator returns a function type (e.g. `property` doesn't). This is a small thing but I'd like to run it by a larger audience than the core mypy devs who have commented so far. There was a brief discussion on python-ideas (my original <https://mail.python.org/pipermail/python-ideas/2017-April/045548.html>, favorable reply <https://mail.python.org/pipermail/python-ideas/2017-May/045550.html> by Nick, my response <https://mail.python.org/pipermail/python-ideas/2017-May/045557.html>). Credit for the proposal goes to Naomi Seyfer, with discussion by Ivan Levkivskyi and Jukka Lehtosalo. If there's no further debate here I'll merge it into the PEP and an implementation will hopefully appear in the next version of the typing module (also hopefully to be included in CPython 3.6.2 and 3.5.4). Here's the proposed text (wordsmithing suggestions in the PR please): +Decorators +---------- + +Decorators can modify the types of the functions or classes they +decorate. Use the ``decorated_type`` decorator to declare the type of +the resulting item after all other decorators have been applied:: + + from typing import ContextManager, Iterator, decorated_type + from contextlib import contextmanager + + class DatabaseSession: ... + + @decorated_type(Callable[[str], ContextManager[DatabaseSession]]) + @contextmanager + def session(url: str) -> Iterator[DatabaseSession]: + s = DatabaseSession(url) + try: + yield s + finally: + s.close() + +The argument of ``decorated_type`` is a type annotation on the name +being declared (``session``, in the example above). If you have +multiple decorators, ``decorated_type`` must be topmost. The +``decorated_type`` decorator is invalid on a function declaration that +is also decorated with ``overload``, but you can annotate the +implementation of the overload series with ``decorated_type``. + -- --Guido van Rossum (python.org/~guido <http://python.org/%7Eguido>)

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Aligning the packaging.python.org theme with the rest of the docs
by Nick Coghlan 02 Jun '17

02 Jun '17

Hi folks, Over on https://github.com/pypa/python-packaging-user-guide/pull/305#issuecomment-3… we're looking to update the theming of packaging.python.org to match that of the language documentation at docs.python.org. Doing that would also entail updating the documentation of the individual tools and services (pip, pypi, setuptools, wheel, etc) to maintain consistency with the main packaging user guide, so Jon has tentatively broken the theme out as a (not yet published anywhere) "pypa-theme" package to make it easier to re-use across multiple projects. The question that occurred to me is whether or not it might make more sense to instead call that package "psf-docs-theme", to reflect that it's intended specifically for projects that are legally backed by the PSF, and that general Python projects looking for a nice, high-contrast, theme should consider using an org independent one like Alabaster instead. Thoughts? Should we stick with pypa-theme as the name? Switch to psf-docs-theme? Publish both, with pypa-theme adding PyPA specific elements to a more general psf-docs-theme? Cheers, Nick. P.S. In case folks aren't aware of the full legal arrangements here: in addition to the informal "Python Packaging Authority" designation, there's also a formally constituted PSF Packaging Working Group that provides the legal connection back to the PSF. That means the relationship between PyPA and the PSF ends up being pretty similar to the one between python-dev and the PSF, where there's no direct PSF involvement in day to day development activities, but the PSF provides the legal and financial backing needed to sustainably maintain popular community-supported software and services. Part of my rationale for suggesting the inclusion of "psf" in the package name is to make it clear that the intent would be to create a clear and distinctive "trade dress" for the documentation of directly PSF backed projects: https://en.wikipedia.org/wiki/Trade_dress#Protection_for_electronic_interfa… Future requests to use the theme (beyond CPython and the PyPA) could then be run through the PSF Trademarks committee, as with requests to use the registered marks. Whereas if we go with pypa-theme, then that would just be a non-precedent-setting agreement between PyPA and CPython to share a documentation theme, without trying to define any form of documentation trade dress for the PSF in general. -- Nick Coghlan | ncoghlan(a)gmail.com | Brisbane, Australia

7 11

Put token information in one place
by Serhiy Storchaka 31 May '17

31 May '17

Currently when you add a new token you need to change a couple of files: * Include/token.h * _PyParser_TokenNames in Parser/tokenizer.c * PyToken_OneChar(), PyToken_TwoChars() or PyToken_ThreeChars() in Parser/tokenizer.c * Lib/token.py (generated from Include/token.h) * EXACT_TOKEN_TYPES in Lib/tokenize.py * Operator, Bracket or Special in Lib/tokenize.py * Doc/library/token.rst It is possible to generate all this information from a single source. Proposed in [1] patch uses Lib/token.py as an initial source. But maybe Lib/token.py also should be generated from some file in general format? Some information can be derived from Grammar/Grammar, but not all. Needed also a mapping between token strings ('(' or '>=') and names (LPAR, GREATEREQUAL). Can this be added in Grammar/Grammar or a new file? There is a related problem, the tokenize module uses three additional tokens not used by the C tokenizer. It modifies the content of the token module after importing it, that is not good. [2] One of solutions is making a copy of tok_names in tokenize before modifying it, but this doesn't work, because third-party code search tokenize constants in token.tok_names. Other solution is adding tokenize specific constants to the token module. Is this good to expose in the token module tokens not used in the C tokenizer? Non-terminal symbols are generated automatically, Lib/symbol.py from Include/graminit.h, and Include/graminit.h and Python/graminit.c from Grammar/Grammar by Parser/pgen. Is it worth to generate Lib/symbol.py by pgen too? Can pgen be implemented in Python? See also similar issue for opcodes. [3] [1] https://bugs.python.org/issue30455 [2] https://bugs.python.org/issue25324 [3] https://bugs.python.org/issue17861

3 3

"Micro-optimisations can speed up CPython"
by Antoine Pitrou 31 May '17

31 May '17

Hi, I hope readers won't get bothered by what is mostly a link to blogpost (well, two of them :-)), but I suspect there at least 2 or 3 people who might be interested in the following analysis: https://www.corsix.org/content/compilers-cpython-interpreter-main-loop http://www.corsix.org/content/micro-optimisations-can-speed-up-cpython Regards Antoine.

14 22

Backport ssl.MemoryBIO on Python 2.7?
by Victor Stinner 30 May '17

30 May '17

Hi, Would you be ok to backport ssl.MemoryBIO and ssl.SSLObject on Python 2.7? I can do the backport. https://docs.python.org/dev/library/ssl.html#ssl.MemoryBIO Cory Benfield told me that it's a blocking issue for him to implement his PEP 543 -- A Unified TLS API for Python 2.7: https://www.python.org/dev/peps/pep-0543/ And I expect that if a new cool TLS API happens, people will want to use it on Python 2.7-3.6, not only on Python 3.7. Security evolves more quickly that the current Python release process, and people wants to keep their application secure. >From what I understood, he wants to first implement an abstract MemoryBIO API (http://sans-io.readthedocs.io/ like API? I'm not sure about that), and then implement a socket/FD based on top of that. Maybe later, some implementations might have a fast-path using socket/FD directly. He described me his PEP and I strongly support it (sorry, I missed it when he posted it on python-dev), but we decided (Guido van Rossum, Christian Heimes, Cory Benfield and me, see the tweet below) to not put this in the stdlib right now, but spend more time on testing it on Twisted, asyncio, requests, etc. So publishing an implementation on PyPI was proposed instead. It seems like we agreed on a smooth plan (or am I wrong, Cory?). https://twitter.com/VictorStinner/status/865467388141027329 I'm quite sure that Twisted will love MemoryBIO on Python 2.7 as well, to implement TLS, especially on Windows using IOCP. Currently, external libraries (C extensions) are required. I'm not sure if the PEP 466 should be amended for that? Is a new PEP really needed? MemoryBIO/SSLObject are tiny. Nick (Coghlan): what do you think? https://www.python.org/dev/peps/pep-0466/ Victor

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Re: [Python-Dev] Aligning the packaging.python.org theme with the rest of the docs
by David Mertz 29 May '17

29 May '17

This is a side issue, do I don't want to go too long with it. But *NO* we can't always give permission. The problem isn't how permissive PSF might like to be in the abstract, but trademark law itself. Trademark is "enforce it or lose it" ... Even passively allowing dilutive derivatives would cause us to lose control of the mark, i.e. we would not have legal authority to prohibit the misleading uses we actually care about preventing. On May 29, 2017 2:32 AM, "Greg Ewing" <greg.ewing(a)canterbury.ac.nz> wrote: M.-A. Lemburg wrote: > In my role as PSF TM committee member, it's often painful to have to > tell community members that they cannot use e.g. really nice looking > variants of the Python logo for their projects. Let's not add more > pain. > But it's always within the PSF's power to give that community member permission to use that variant if they ask, is it not? So you don't actually have to tell anyone that they can't use anything. -- Greg _______________________________________________ Python-Dev mailing list Python-Dev(a)python.org https://mail.python.org/mailman/listinfo/python-dev Unsubscribe: https://mail.python.org/mailman/options/python-dev/mertz%40g nosis.cx

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Deprecate invalid ctypes call protection on Windows
by Steve Dower 27 May '17

27 May '17

One of the main reasons we are stuck with an old libffi fork in CPython is because the newer versions do not support protection from calling functions with too few/many arguments: https://docs.python.org/3/library/ctypes.html?highlight=ctypes#calling-func… There are a number of caveats here, including "this only works on Windows", but since it is documented we cannot just remove the behaviour without a deprecation period. I'd like to propose a highly-accelerated deprecation period for this specific feature, starting in CPython 3.6.2 and being "completed" in 3.7.0, when we will hopefully move onto a newer libffi. In general, the "feature" is a misfeature anyway, since calling a native function with incorrect arguments is unsupported and a very easy way to cause information leakage or code execution vulnerabilities. There may be an argument for removing the functionality immediately, but honestly I think changing libffi in a point release is higher risk. Once the special protection is removed, most of these cases will become OSError due to the general protection against segmentation faults. Some will undoubtedly fall through the cracks and crash the entire interpreter, but these are unavoidable (and really ought to crash to avoid potential exploits). Does anyone have any reasons to oppose this? It already has votes from another Windows expert and the 3.6/3.7 Release Manager, but we wanted to see if anyone has a concern we haven't thought of. Cheers, Steve

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Summary of Python tracker Issues
by Python tracker 26 May '17

26 May '17

ACTIVITY SUMMARY (2017-05-19 - 2017-05-26) 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 5999 (+31) closed 36241 (+50) total 42240 (+81) Open issues with patches: 2372 Issues opened (62) ================== #21074: Too aggressive constant folding http://bugs.python.org/issue21074 reopened by haypo #30405: build.bat: register binaries for py launcher http://bugs.python.org/issue30405 opened by terry.reedy #30406: async and await should be keywords in 3.7 http://bugs.python.org/issue30406 opened by Jelle Zijlstra #30410: Documentation for sys.stdout encoding does not reflect the new http://bugs.python.org/issue30410 opened by paul.moore #30411: git doesn't support "-C" args under 1.8.5 occurs in configure. http://bugs.python.org/issue30411 opened by Yuan Liu #30412: mailbox : add option to prevent platform EOL conversion http://bugs.python.org/issue30412 opened by adder #30413: Add fnmatch.filterfalse function http://bugs.python.org/issue30413 opened by steven.daprano #30416: constant folding opens compiler to quadratic time hashing http://bugs.python.org/issue30416 opened by dalke #30417: [buildbot] Disable the cpu resources on slow buildbots http://bugs.python.org/issue30417 opened by haypo #30418: test_communicate_epipe() of test_subprocess fails randomly on http://bugs.python.org/issue30418 opened by haypo #30419: Bdb: Update doc page http://bugs.python.org/issue30419 opened by csabella #30420: Clarify kwarg handing for subprocess convenience APIs http://bugs.python.org/issue30420 opened by ncoghlan #30421: argparse: relative include of config files http://bugs.python.org/issue30421 opened by roschi #30422: Add roadmap.txt section to idlelib http://bugs.python.org/issue30422 opened by terry.reedy #30424: make pydoc-topics fails http://bugs.python.org/issue30424 opened by Jelle Zijlstra #30425: Python 3.6.1 (32-bit)_20170522020736.log http://bugs.python.org/issue30425 opened by Chakrit Rakhuang #30427: isinstance checks in os.path.normcase redundant with os.fspath http://bugs.python.org/issue30427 opened by wolma #30428: mailbox.MMDF wrongly adds From_ header to file http://bugs.python.org/issue30428 opened by ralph.corderoy #30429: bdb and pdb: Add watchpoint function http://bugs.python.org/issue30429 opened by louielu #30430: Cannot write to a tun interface file http://bugs.python.org/issue30430 opened by Rémy Léone #30431: input function truncates prompt by NULL byte http://bugs.python.org/issue30431 opened by Костя Чолак #30433: Devguide lacks instructions for building docs http://bugs.python.org/issue30433 opened by cjrh #30434: multiprocessing AuthenticationError "digest sent was rejected" http://bugs.python.org/issue30434 opened by Soon Jeffrey #30435: Documentation either unclear or incorrect on comparisons betwe http://bugs.python.org/issue30435 opened by ipatrol #30436: importlib.find_spec raises AttributeError when parent is not a http://bugs.python.org/issue30436 opened by tkhyn #30437: SSL_shutdown can return meaningless SSL_ERROR_SYSCALL http://bugs.python.org/issue30437 opened by njs #30438: tarfile would fail to extract tarballs with files under R/O di http://bugs.python.org/issue30438 opened by Yaroslav.Halchenko #30439: Expose the subinterpreters C-API in the stdlib. http://bugs.python.org/issue30439 opened by eric.snow #30440: document peephole optimizer effects http://bugs.python.org/issue30440 opened by dalke #30441: os.environ raises RuntimeError: dictionary changed size during http://bugs.python.org/issue30441 opened by osantana #30442: Skip test_xml_etree under coverage http://bugs.python.org/issue30442 opened by kushal.das #30444: Add ability to change "-- more --" text in pager module http://bugs.python.org/issue30444 opened by Gautam krishna.R #30446: Embedded 3.6.1 distribution cannot find _socket module http://bugs.python.org/issue30446 opened by ThomasS #30448: test_subprocess creates a core dump on FreeBSD http://bugs.python.org/issue30448 opened by haypo #30449: Improve __slots__ datamodel documentation http://bugs.python.org/issue30449 opened by Aaron Hall #30450: Pull Windows dependencies from GitHub rather than svn.python.o http://bugs.python.org/issue30450 opened by zach.ware #30451: parse windows path error in webbrowser.get() and lead to webbr http://bugs.python.org/issue30451 opened by chainly #30454: Python module cx_Oracle ld installation issue on Solaris11U3 S http://bugs.python.org/issue30454 opened by sameernatekar #30455: Generate C code from token.py and not vice versa http://bugs.python.org/issue30455 opened by serhiy.storchaka #30456: 2to3 docs: example of fix for duplicates in second argument of http://bugs.python.org/issue30456 opened by Eli_B #30457: Allow retrieve the number of waiters pending for most of the a http://bugs.python.org/issue30457 opened by pfreixes #30458: CRLF Injection in httplib http://bugs.python.org/issue30458 opened by orange #30459: PyList_SET_ITEM could be safer http://bugs.python.org/issue30459 opened by espie #30460: file opened for updating cannot write after read http://bugs.python.org/issue30460 opened by jkloth #30462: urllib does not support NO_PROXY environment variable containi http://bugs.python.org/issue30462 opened by Jiri Hnidek #30463: Add __slots__ to ABC convenience class http://bugs.python.org/issue30463 opened by Aaron Hall #30464: gammavariate has a wrong comment http://bugs.python.org/issue30464 opened by leodema #30465: FormattedValue expressions have wrong lineno and col_offset in http://bugs.python.org/issue30465 opened by lukasz.langa #30466: Tutorial doesn't explain the use of classes http://bugs.python.org/issue30466 opened by trey #30468: Propagate zipfile.py pypy issue #905 patch to CPython 3.7 http://bugs.python.org/issue30468 opened by shubhar #30469: Inconsistent Execution of Generic Descriptor Attributes http://bugs.python.org/issue30469 opened by Ryan Morshead #30470: Deprecate invalid ctypes call protection on Windows http://bugs.python.org/issue30470 opened by Mariatta #30473: defaultdict raises SystemError, __missing__ returned NULL in t http://bugs.python.org/issue30473 opened by Peter Parente #30475: Docs for PyDict_GetItemWithError() should say it returns a bor http://bugs.python.org/issue30475 opened by eric.snow #30476: Add _GenerateCRCTable() to zipfile.py to pre-compute CRC Tab http://bugs.python.org/issue30476 opened by shubhar #30477: tuple.index error message improvement http://bugs.python.org/issue30477 opened by llllllllll #30479: improve asyncio debugging http://bugs.python.org/issue30479 opened by tarek #30480: samefile and sameopenfile fail for WebDAV mapped drives http://bugs.python.org/issue30480 opened by eryksun #30482: socket.getservbyname(), socket.getservbyport(), socket.getprot http://bugs.python.org/issue30482 opened by dwfreed #30483: urllib.parse.parse_qsl does not handle unicode data properly http://bugs.python.org/issue30483 opened by maxking #30484: Garbage Collector can cause Segfault whilst iterating dictiona http://bugs.python.org/issue30484 opened by jimwright #30485: Element.findall(path, dict) doesn't insert null namespace http://bugs.python.org/issue30485 opened by ben.wainwright Most recent 15 issues with no replies (15) ========================================== #30484: Garbage Collector can cause Segfault whilst iterating dictiona http://bugs.python.org/issue30484 #30483: urllib.parse.parse_qsl does not handle unicode data properly http://bugs.python.org/issue30483 #30480: samefile and sameopenfile fail for WebDAV mapped drives http://bugs.python.org/issue30480 #30479: improve asyncio debugging http://bugs.python.org/issue30479 #30476: Add _GenerateCRCTable() to zipfile.py to pre-compute CRC Tab http://bugs.python.org/issue30476 #30475: Docs for PyDict_GetItemWithError() should say it returns a bor http://bugs.python.org/issue30475 #30470: Deprecate invalid ctypes call protection on Windows http://bugs.python.org/issue30470 #30462: urllib does not support NO_PROXY environment variable containi http://bugs.python.org/issue30462 #30458: CRLF Injection in httplib http://bugs.python.org/issue30458 #30457: Allow retrieve the number of waiters pending for most of the a http://bugs.python.org/issue30457 #30456: 2to3 docs: example of fix for duplicates in second argument of http://bugs.python.org/issue30456 #30454: Python module cx_Oracle ld installation issue on Solaris11U3 S http://bugs.python.org/issue30454 #30428: mailbox.MMDF wrongly adds From_ header to file http://bugs.python.org/issue30428 #30425: Python 3.6.1 (32-bit)_20170522020736.log http://bugs.python.org/issue30425 #30419: Bdb: Update doc page http://bugs.python.org/issue30419 Most recent 15 issues waiting for review (15) ============================================= #30468: Propagate zipfile.py pypy issue #905 patch to CPython 3.7 http://bugs.python.org/issue30468 #30466: Tutorial doesn't explain the use of classes http://bugs.python.org/issue30466 #30465: FormattedValue expressions have wrong lineno and col_offset in http://bugs.python.org/issue30465 #30450: Pull Windows dependencies from GitHub rather than svn.python.o http://bugs.python.org/issue30450 #30449: Improve __slots__ datamodel documentation http://bugs.python.org/issue30449 #30441: os.environ raises RuntimeError: dictionary changed size during http://bugs.python.org/issue30441 #30439: Expose the subinterpreters C-API in the stdlib. http://bugs.python.org/issue30439 #30438: tarfile would fail to extract tarballs with files under R/O di http://bugs.python.org/issue30438 #30431: input function truncates prompt by NULL byte http://bugs.python.org/issue30431 #30427: isinstance checks in os.path.normcase redundant with os.fspath http://bugs.python.org/issue30427 #30421: argparse: relative include of config files http://bugs.python.org/issue30421 #30416: constant folding opens compiler to quadratic time hashing http://bugs.python.org/issue30416 #30413: Add fnmatch.filterfalse function http://bugs.python.org/issue30413 #30404: Make stdout and stderr truly unbuffered when using -u option http://bugs.python.org/issue30404 #30403: Running extension modules using -m switch http://bugs.python.org/issue30403 Top 10 most discussed issues (10) ================================= #30441: os.environ raises RuntimeError: dictionary changed size during http://bugs.python.org/issue30441 18 msgs #30290: IDLE: add tests for help_about.py http://bugs.python.org/issue30290 16 msgs #30405: build.bat: register binaries for py launcher http://bugs.python.org/issue30405 11 msgs #30413: Add fnmatch.filterfalse function http://bugs.python.org/issue30413 11 msgs #30459: PyList_SET_ITEM could be safer http://bugs.python.org/issue30459 9 msgs #12857: Expose called function on frame object http://bugs.python.org/issue12857 8 msgs #21074: Too aggressive constant folding http://bugs.python.org/issue21074 8 msgs #22257: PEP 432: Redesign the interpreter startup sequence http://bugs.python.org/issue22257 8 msgs #30362: Launcher add list and list with paths options http://bugs.python.org/issue30362 8 msgs #30392: default webbrowser fails on macOS Sierra 10.12.5 http://bugs.python.org/issue30392 8 msgs Issues closed (50) ================== #11410: Use GCC visibility attrs in PyAPI_* http://bugs.python.org/issue11410 closed by twouters #11470: Flag inappropriate uses of callable class attributes http://bugs.python.org/issue11470 closed by twouters #17411: Build failures with non-NDEBUG, non-Py_DEBUG builds. http://bugs.python.org/issue17411 closed by twouters #21056: csv documentation is incorrect http://bugs.python.org/issue21056 closed by Mariatta #23894: lib2to3 doesn't recognize rb'...' and f'...' in Python 3.6 http://bugs.python.org/issue23894 closed by lukasz.langa #25794: __setattr__ does not always overload operators http://bugs.python.org/issue25794 closed by serhiy.storchaka #27728: HTTPConnection.requests has a mutable as default value for hea http://bugs.python.org/issue27728 closed by matrixise #27945: Various segfaults with dict http://bugs.python.org/issue27945 closed by serhiy.storchaka #28567: Bus error / segmentation fault on macOS debug build when using http://bugs.python.org/issue28567 closed by ned.deily #28707: add 'directory' option to the http.server module http://bugs.python.org/issue28707 closed by haypo #28845: Clean up known issues for AIX http://bugs.python.org/issue28845 closed by zach.ware #29102: Add an id field to PyInterpreterState. http://bugs.python.org/issue29102 closed by eric.snow #29104: Left bracket remains in format string result when '\' preceeds http://bugs.python.org/issue29104 closed by serhiy.storchaka #29321: Wrong documentation (Language Ref) for unicode and str compari http://bugs.python.org/issue29321 closed by martin.panter #29335: subprocess module does not check WIFSTOPPED on SIGCHLD http://bugs.python.org/issue29335 closed by gregory.p.smith #29340: SSL destructor segfaults in python3.6 threads when an unverifi http://bugs.python.org/issue29340 closed by christian.heimes #29851: Have importlib.reload() raise ModuleNotFoundError when a spec http://bugs.python.org/issue29851 closed by brett.cannon #29943: PySlice_GetIndicesEx change broke ABI in 3.5 and 3.6 branches http://bugs.python.org/issue29943 closed by serhiy.storchaka #29976: urllib.parse clarify what ' ' in schemes mean http://bugs.python.org/issue29976 closed by orsenthil #30003: Fix handling escape characters in HZ codec http://bugs.python.org/issue30003 closed by xiang.zhang #30160: BaseHTTPRequestHandler.wfile: supported usage unclear http://bugs.python.org/issue30160 closed by zach.ware #30178: Indent methods and attributes of MimeTypes class http://bugs.python.org/issue30178 closed by Mariatta #30310: tkFont.py assumes that all font families are encoded as ascii http://bugs.python.org/issue30310 closed by serhiy.storchaka #30355: Unicode symbols crash lib2to3.parse http://bugs.python.org/issue30355 closed by terry.reedy #30372: Status of __builtins__ is not totally clear http://bugs.python.org/issue30372 closed by Mariatta #30376: Curses documentation refers to incorrect type http://bugs.python.org/issue30376 closed by kushal.das #30377: Unnecessary complexity in tokenize.py: comments and newlines http://bugs.python.org/issue30377 closed by serhiy.storchaka #30380: Sphinx 1.6.1 raising new warnings in docs build http://bugs.python.org/issue30380 closed by brett.cannon #30394: smtplib leaves open sockets around if SMTPConnectError is rais http://bugs.python.org/issue30394 closed by xiang.zhang #30401: Remove the .bzrignore file http://bugs.python.org/issue30401 closed by Mariatta #30407: ipaddress ver. 1.0.14 IPv4Network off by 1 http://bugs.python.org/issue30407 closed by xiang.zhang #30408: [defaultdict] default_factory should accept a "key" default pa http://bugs.python.org/issue30408 closed by namtt #30409: locale.getpreferredencoding doesn't return result http://bugs.python.org/issue30409 closed by haypo #30414: multiprocesing.Queue silently ignore messages after exc in _fe http://bugs.python.org/issue30414 closed by pitrou #30415: Improve fnmatch testing http://bugs.python.org/issue30415 closed by serhiy.storchaka #30423: [asyncio] orphan future close loop and cause "RuntimeError: Ev http://bugs.python.org/issue30423 closed by lukasz.langa #30426: why not use the same style func name. eg: int.to_bytes (with u http://bugs.python.org/issue30426 closed by eric.smith #30432: FileInput doesn't accept PathLike objects for file names http://bugs.python.org/issue30432 closed by lukasz.langa #30443: datetime.datetime.__add__ does not respect fold. http://bugs.python.org/issue30443 closed by belopolsky #30445: test_traceback fails in coverage run http://bugs.python.org/issue30445 closed by zach.ware #30447: test_capi.test_subinterps() fails on ARMv7 Ubuntu 3.x http://bugs.python.org/issue30447 closed by eric.snow #30452: xml.etree sourcecode bug http://bugs.python.org/issue30452 closed by serhiy.storchaka #30453: str.format() method, Rounding off wrong http://bugs.python.org/issue30453 closed by mark.dickinson #30461: glob returns results in undeterministic order http://bugs.python.org/issue30461 closed by rhettinger #30467: Propagate zipfile.py pypy issue #905 patch to CPython 2.7 http://bugs.python.org/issue30467 closed by serhiy.storchaka #30471: "as" keyword in comprehensions http://bugs.python.org/issue30471 closed by rhettinger #30472: [Selenium 3.4.2-geckodriver 0.16.1] Python 3.6.1 unable to ini http://bugs.python.org/issue30472 closed by pitrou #30474: Crash on OS X EXC_BAD_ACCESS (SIGSEGV) http://bugs.python.org/issue30474 closed by ned.deily #30478: Python 2.7 crashes in Linux environment http://bugs.python.org/issue30478 closed by ncoghlan #30481: lib/socket.py, line 330, Treated 'file' as a socket object, in http://bugs.python.org/issue30481 closed by Mohamad amin Khakzadan

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2017 Python Language Summit coverage
by Jake Edge 26 May '17

26 May '17

Hola python-dev, Thanks to Larry and Barry, I was able to sit in on the Python Language Summit again this year. The start of the coverage for that is now available. The starting point is the overview article, here: https://lwn.net/Articles/723251/ (for non-subscribers, this link will get around the paywall: https://lwn.net/SubscriberLink/723251/2d2cbb3329dd87f8/ ) It will be updated as I add more sessions over the next week or so. LWN subscribers can see the content right away, but one week after they are published in the weekly edition, they become freely available for everyone. Until then, though, feel free to share the SubscriberLinks I am posting here. Python 3.6.x, 3.7.0, and beyond: https://lwn.net/Articles/723252/ or https://lwn.net/SubscriberLink/723252/c5bfea8533558bab/ New CPython workflow issues: https://lwn.net/Articles/723418/ or https://lwn.net/SubscriberLink/723418/62487f893b324500/ The state of bugs.python.org: https://lwn.net/Articles/723513/ or https://lwn.net/SubscriberLink/723513/7e4e2e626fc93606/ Progress on the Gilectomy: https://lwn.net/Articles/723514/ or https://lwn.net/SubscriberLink/723514/70df37b92c746d62/ Hopefully I captured things reasonably well -- if you have corrections or clarifications (or just comments :) , I would recommend posting them as comments on the article. I will post an update next week with the next round (with luck, all of the rest of them). enjoy! jake -- Jake Edge - LWN - jake(a)lwn.net - http://lwn.net

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Snap Python for simple distribution across multiple Linux distros
by Martin Wimpress 25 May '17

25 May '17

Hi all, I work at Canonical as part of the engineering team developing Ubuntu and Snapcraft [1] and I'm a long time Python fan :-) We've created snaps, a platform that enables projects to directly control delivery of software updates to users. This video of a lightning talk by dlang developers at DConf2017 [2] shows how they've made good use of snaps to distribute their compiler. They found the release channels particularly useful so their users can track a specific release. Is there someone here who'd be interested in doing the same for Python? [1] https://snapcraft.io/ [2] https://www.youtube.com/watch?v=M-bDzr4gYUU [3] https://snapcraft.io/docs/core/install [4] https://build.snapcraft.io/ -- Regards, Martin.

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Python-Dev May 2017