Mailman 3 January 2018 - Python-Dev

GH-NNNN vs #NNNN in merge commit
by INADA Naoki 26 Jan '18

26 Jan '18

Hi. Devguide says: """ Replace the reference to GitHub pull request #NNNN with GH-NNNN. If the title is too long, the pull request number can be added to the message body. """ https://devguide.python.org/gitbootcamp/#accepting-and-merging-a-pull-reque… But there are more #NNNN than GH-NNNN in commit log. https://github.com/python/cpython/commits/master Where should we go? Encourage GH-NNNN? or abandon it and use default #NNNN? Regards, -- INADA Naoki <songofacandy(a)gmail.com>

12 33

Summary of Python tracker Issues
by Python tracker 26 Jan '18

26 Jan '18

ACTIVITY SUMMARY (2018-01-19 - 2018-01-26) Python tracker at https://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 6445 (+45) closed 37988 (+39) total 44433 (+84) Open issues with patches: 2512 Issues opened (70) ================== #10381: Add timezone support to datetime C API https://bugs.python.org/issue10381 reopened by vstinner #20767: Some python extensions can't be compiled with clang 3.4 https://bugs.python.org/issue20767 reopened by vstinner #29708: support reproducible Python builds https://bugs.python.org/issue29708 reopened by brett.cannon #32441: os.dup2 should return the new fd https://bugs.python.org/issue32441 reopened by vstinner #32591: Deprecate sys.set_coroutine_wrapper and replace it with more f https://bugs.python.org/issue32591 reopened by yselivanov #32599: Add dtrace hook for PyCFunction_Call https://bugs.python.org/issue32599 opened by fche #32601: PosixPathTest.test_expanduser fails in NixOS build sandbox https://bugs.python.org/issue32601 opened by andersk #32603: Deprecation warning on strings used in re module https://bugs.python.org/issue32603 opened by csabella #32604: Expose the subinterpreters C-API in Python for testing use. https://bugs.python.org/issue32604 opened by eric.snow #32605: Should we really hide unawaited coroutine warnings when an exc https://bugs.python.org/issue32605 opened by njs #32606: Email Header Injection Protection Bypass https://bugs.python.org/issue32606 opened by thedoctorsoup #32608: Incompatibilities with the socketserver and multiprocessing pa https://bugs.python.org/issue32608 opened by rbprogrammer #32609: Add setter and getter for min/max protocol ersion https://bugs.python.org/issue32609 opened by christian.heimes #32610: asyncio.all_tasks() should return only non-finished tasks. https://bugs.python.org/issue32610 opened by asvetlov #32611: Tkinter taskbar icon (Windows) https://bugs.python.org/issue32611 opened by Minion Jim #32612: pathlib.(Pure)WindowsPaths can compare equal but refer to diff https://bugs.python.org/issue32612 opened by benrg #32613: Use PEP 397 py launcher in windows faq https://bugs.python.org/issue32613 opened by mdk #32614: Fix documentation examples of using re with escape sequences https://bugs.python.org/issue32614 opened by csabella #32615: Inconsistent behavior if globals is a dict subclass https://bugs.python.org/issue32615 opened by ppperry #32616: Significant performance problems with Python 2.7 built with cl https://bugs.python.org/issue32616 opened by zmwangx #32620: [3.5] Travis CI fails on Python 3.5 with "pyenv: version `3.5' https://bugs.python.org/issue32620 opened by vstinner #32621: Problem of consistence in collection.abc documentation https://bugs.python.org/issue32621 opened by yahya-abou-imran #32622: Implement loop.sendfile https://bugs.python.org/issue32622 opened by asvetlov #32623: Resize dict on del/pop https://bugs.python.org/issue32623 opened by yselivanov #32624: Implement WriteTransport.is_protocol_paused() https://bugs.python.org/issue32624 opened by asvetlov #32625: Update the dis module documentation to reflect switch to wordc https://bugs.python.org/issue32625 opened by belopolsky #32626: Subscript unpacking raises SyntaxError https://bugs.python.org/issue32626 opened by Ben Burrill #32627: Header dependent _uuid build failure on Fedora 27 https://bugs.python.org/issue32627 opened by ncoghlan #32628: Add configurable DirectoryIndex to http.server https://bugs.python.org/issue32628 opened by epaulson #32629: PyImport_ImportModule occasionally cause access violation https://bugs.python.org/issue32629 opened by Jack Branson #32630: Migrate decimal to use PEP 567 context variables https://bugs.python.org/issue32630 opened by yselivanov #32631: IDLE: revise zzdummy.py https://bugs.python.org/issue32631 opened by terry.reedy #32637: Android: set sys.platform to android https://bugs.python.org/issue32637 opened by vstinner #32638: distutils test errors with AIX and xlc https://bugs.python.org/issue32638 opened by Michael.Felt #32640: Python 2.7 str.join documentation is incorrect https://bugs.python.org/issue32640 opened by Malcolm Smith #32642: add support for path-like objects in sys.path https://bugs.python.org/issue32642 opened by chris.jerdonek #32644: unittest.mock.call len() error https://bugs.python.org/issue32644 opened by snakevil #32645: test_asyncio: TLS tests fail on "x86 Windows7" buildbot https://bugs.python.org/issue32645 opened by vstinner #32646: test_asyncgen: race condition on test_async_gen_asyncio_gc_acl https://bugs.python.org/issue32646 opened by vstinner #32647: Undefined references when compiling ctypes on binutils 2.29.1 https://bugs.python.org/issue32647 opened by cstratak #32649: complete C API doc debug and profile part with new PyTrace_OPC https://bugs.python.org/issue32649 opened by xiang.zhang #32650: Debug support for native coroutines is broken https://bugs.python.org/issue32650 opened by asvetlov #32652: test_distutils: BuildRpmTestCase tests fail on RHEL buildbots https://bugs.python.org/issue32652 opened by vstinner #32653: AttributeError: 'Task' object has no attribute '_callbacks' https://bugs.python.org/issue32653 opened by Timur Irmatov #32654: Fixes Python for Android API 19 https://bugs.python.org/issue32654 opened by vstinner #32655: File mode should be a constant https://bugs.python.org/issue32655 opened by nagayev #32657: Mutable Objects in SMTP send_message Signature https://bugs.python.org/issue32657 opened by Kenny Trytek #32658: Metacharacter (\) documentation suggestion https://bugs.python.org/issue32658 opened by kdraeder #32659: Solaris "stat" should support "st_fstype" https://bugs.python.org/issue32659 opened by jcea #32660: Solaris should support constants like termios' FIONREAD https://bugs.python.org/issue32660 opened by jcea #32661: ProactorEventLoop locks up on close call https://bugs.python.org/issue32661 opened by rt121212121 #32662: Implement Server.serve_forever and corresponding APIs https://bugs.python.org/issue32662 opened by yselivanov #32663: SMTPUTF8SimTests are not actually being run https://bugs.python.org/issue32663 opened by chason.chaffin #32664: Connector "|" missing between ImportError and LookupError https://bugs.python.org/issue32664 opened by Richard Neumann #32665: pathlib.Path._from_parsed_parts should call cls.__new__(cls) https://bugs.python.org/issue32665 opened by qb-cea #32666: Valgrind documentation seems to need updating https://bugs.python.org/issue32666 opened by rrt #32668: deepcopy() fails on ArgumentParser instances https://bugs.python.org/issue32668 opened by mkolman #32669: cgitb file to print OSError exceptions https://bugs.python.org/issue32669 opened by hardkrash #32670: Enforce PEP 479—StopIteration and generators—in Python 3.7 https://bugs.python.org/issue32670 opened by yselivanov #32671: redesign Windows os.getlogin, and add os.getuser https://bugs.python.org/issue32671 opened by eryksun #32672: .then execution of actions following a future's completion https://bugs.python.org/issue32672 opened by dancollins34 #32674: minor documentation fix for '__import__' https://bugs.python.org/issue32674 opened by Qian Yun #32675: dict.__contains__(unhashable) raises TypeError where False was https://bugs.python.org/issue32675 opened by xitop #32676: test_asyncio emits many warnings when run in debug mode https://bugs.python.org/issue32676 opened by vstinner #32677: Add.isascii() to str, bytes and bytearray https://bugs.python.org/issue32677 opened by inada.naoki #32678: Lazy import ast in inspect https://bugs.python.org/issue32678 opened by inada.naoki #32679: concurrent.futures should store full sys.exc_info() https://bugs.python.org/issue32679 opened by jonash #32680: smtplib SMTP instances missing a default sock attribute https://bugs.python.org/issue32680 opened by Romuald #32681: Fix uninitialized variable in os_dup2_impl https://bugs.python.org/issue32681 opened by matrixise #32682: test_zlib improve version parsing https://bugs.python.org/issue32682 opened by pmpp Most recent 15 issues with no replies (15) ========================================== #32682: test_zlib improve version parsing https://bugs.python.org/issue32682 #32678: Lazy import ast in inspect https://bugs.python.org/issue32678 #32676: test_asyncio emits many warnings when run in debug mode https://bugs.python.org/issue32676 #32671: redesign Windows os.getlogin, and add os.getuser https://bugs.python.org/issue32671 #32670: Enforce PEP 479—StopIteration and generators—in Python 3.7 https://bugs.python.org/issue32670 #32668: deepcopy() fails on ArgumentParser instances https://bugs.python.org/issue32668 #32666: Valgrind documentation seems to need updating https://bugs.python.org/issue32666 #32664: Connector "|" missing between ImportError and LookupError https://bugs.python.org/issue32664 #32663: SMTPUTF8SimTests are not actually being run https://bugs.python.org/issue32663 #32661: ProactorEventLoop locks up on close call https://bugs.python.org/issue32661 #32659: Solaris "stat" should support "st_fstype" https://bugs.python.org/issue32659 #32658: Metacharacter (\) documentation suggestion https://bugs.python.org/issue32658 #32650: Debug support for native coroutines is broken https://bugs.python.org/issue32650 #32649: complete C API doc debug and profile part with new PyTrace_OPC https://bugs.python.org/issue32649 #32646: test_asyncgen: race condition on test_async_gen_asyncio_gc_acl https://bugs.python.org/issue32646 Most recent 15 issues waiting for review (15) ============================================= #32682: test_zlib improve version parsing https://bugs.python.org/issue32682 #32681: Fix uninitialized variable in os_dup2_impl https://bugs.python.org/issue32681 #32680: smtplib SMTP instances missing a default sock attribute https://bugs.python.org/issue32680 #32678: Lazy import ast in inspect https://bugs.python.org/issue32678 #32677: Add.isascii() to str, bytes and bytearray https://bugs.python.org/issue32677 #32674: minor documentation fix for '__import__' https://bugs.python.org/issue32674 #32672: .then execution of actions following a future's completion https://bugs.python.org/issue32672 #32670: Enforce PEP 479—StopIteration and generators—in Python 3.7 https://bugs.python.org/issue32670 #32663: SMTPUTF8SimTests are not actually being run https://bugs.python.org/issue32663 #32662: Implement Server.serve_forever and corresponding APIs https://bugs.python.org/issue32662 #32660: Solaris should support constants like termios' FIONREAD https://bugs.python.org/issue32660 #32659: Solaris "stat" should support "st_fstype" https://bugs.python.org/issue32659 #32657: Mutable Objects in SMTP send_message Signature https://bugs.python.org/issue32657 #32654: Fixes Python for Android API 19 https://bugs.python.org/issue32654 #32652: test_distutils: BuildRpmTestCase tests fail on RHEL buildbots https://bugs.python.org/issue32652 Top 10 most discussed issues (10) ================================= #32513: dataclasses: make it easier to use user-supplied special metho https://bugs.python.org/issue32513 16 msgs #32630: Migrate decimal to use PEP 567 context variables https://bugs.python.org/issue32630 11 msgs #27815: Make SSL suppress_ragged_eofs default more secure https://bugs.python.org/issue27815 10 msgs #32436: Implement PEP 567 https://bugs.python.org/issue32436 10 msgs #30491: Add a lightweight mechanism for detecting un-awaited coroutine https://bugs.python.org/issue30491 8 msgs #32591: Deprecate sys.set_coroutine_wrapper and replace it with more f https://bugs.python.org/issue32591 8 msgs #32612: pathlib.(Pure)WindowsPaths can compare equal but refer to diff https://bugs.python.org/issue32612 8 msgs #32623: Resize dict on del/pop https://bugs.python.org/issue32623 8 msgs #32654: Fixes Python for Android API 19 https://bugs.python.org/issue32654 8 msgs #32657: Mutable Objects in SMTP send_message Signature https://bugs.python.org/issue32657 8 msgs Issues closed (40) ================== #17799: settrace docs are wrong about "c_call" events https://bugs.python.org/issue17799 closed by xiang.zhang #17882: test_objecttypes fails for 3.2.4 on CentOS 6 https://bugs.python.org/issue17882 closed by bharper #28980: ResourceWarning when imorting antigravity in 3.6 https://bugs.python.org/issue28980 closed by levkivskyi #29302: add contextlib.AsyncExitStack https://bugs.python.org/issue29302 closed by yselivanov #29752: Enum._missing_ not called for __getitem__ failures https://bugs.python.org/issue29752 closed by ethan.furman #31179: Speed-up dict.copy() up to 5.5 times. https://bugs.python.org/issue31179 closed by yselivanov #32028: Syntactically wrong suggestions by the new custom print statem https://bugs.python.org/issue32028 closed by ncoghlan #32030: PEP 432: Rewrite Py_Main() https://bugs.python.org/issue32030 closed by vstinner #32248: Port importlib_resources (module and ABC) to Python 3.7 https://bugs.python.org/issue32248 closed by barry #32391: Add StreamWriter.wait_closed() https://bugs.python.org/issue32391 closed by asvetlov #32410: Implement loop.sock_sendfile method https://bugs.python.org/issue32410 closed by asvetlov #32502: uuid1() fails if only 64-bit interface addresses are available https://bugs.python.org/issue32502 closed by barry #32503: Avoid creating small frames in pickle protocol 4 https://bugs.python.org/issue32503 closed by serhiy.storchaka #32567: Venv’s config file (pyvenv.cfg) should be compatible with Co https://bugs.python.org/issue32567 closed by vinay.sajip #32574: asyncio.Queue, put() leaks memory if the queue is full https://bugs.python.org/issue32574 closed by yselivanov #32589: Statistics as a result from timeit https://bugs.python.org/issue32589 closed by MGilch #32590: Proposal: add an "ensure(arg)" builtin for parameter validatio https://bugs.python.org/issue32590 closed by ncoghlan #32593: Drop support of FreeBSD 9 and older in Python 3.7 https://bugs.python.org/issue32593 closed by vstinner #32594: File object 'name' attribute inconsistent type and not obvious https://bugs.python.org/issue32594 closed by r.david.murray #32596: Lazy import concurrent.futures.process and thread https://bugs.python.org/issue32596 closed by inada.naoki #32598: Use autoconf to detect OpenSSL and libssl features https://bugs.python.org/issue32598 closed by christian.heimes #32600: SpooledTemporaryFile should implement IOBase https://bugs.python.org/issue32600 closed by martin.panter #32602: Test ECDSA and dual mode context https://bugs.python.org/issue32602 closed by christian.heimes #32607: After Python Installation Error https://bugs.python.org/issue32607 closed by pablogsal #32617: dict.update does not concat/replace if same key https://bugs.python.org/issue32617 closed by eric.smith #32618: fix test_codeccallbacks.test_mutatingdecodehandler https://bugs.python.org/issue32618 closed by xiang.zhang #32619: multiplication error https://bugs.python.org/issue32619 closed by steven.daprano #32632: Mock does not create deepcopy of mutable args https://bugs.python.org/issue32632 closed by michael.foord #32633: Warnings from test_asyncio.test_tasks.SetMethodsTest https://bugs.python.org/issue32633 closed by asvetlov #32634: Message parsing fails where it has incompele headers https://bugs.python.org/issue32634 closed by r.david.murray #32635: test_crypt segfaults when using libxcrypt instead of libcrypt https://bugs.python.org/issue32635 closed by cstratak #32636: test_asyncio fails with PYTHONASYNCIODEBUG=1 https://bugs.python.org/issue32636 closed by yselivanov #32639: Coverity: CID 1428443: Null pointer dereferences (NULL_RETURNS https://bugs.python.org/issue32639 closed by yselivanov #32641: test_context and test_asyncio crash on Windows 7 https://bugs.python.org/issue32641 closed by yselivanov #32643: Make Task._step, Task._wakeup and Future._schedule_callback me https://bugs.python.org/issue32643 closed by yselivanov #32648: Wrong byte count with struct https://bugs.python.org/issue32648 closed by christian.heimes #32651: os.getlogin() should recommend getpass.getuser() https://bugs.python.org/issue32651 closed by barry #32656: writing to stdout prints extraneous size character https://bugs.python.org/issue32656 closed by zach.ware #32667: test_subprocess and test_dtrace fails if the last entry of $PA https://bugs.python.org/issue32667 closed by jayyin11043 #32673: update tutorial dict part to reflect dict is ordered https://bugs.python.org/issue32673 closed by xiang.zhang

1 0

inconsistency in annotated assigned targets
by Joe Jevnik 25 Jan '18

25 Jan '18

Currently there are many ways to introduce variables in Python; however, only a few allow annotations. I was working on a toy language and chose to base my syntax on Python's when I noticed that I could not annotate a loop iteration variable. For example: for x: int in range(5): ... This led me to search for other places where new variables are introduced and I noticed that the `as` target of a context manager cannot have an annotation. In the case of a context manager, it would probably need parenthesis to avoid ambiguity with a single-line with statement, for example: with ctx as (variable: annotation): body Finally, you cannot annotate individual members of a destructuring assignment like: a: int, b: int, c: int = 1, 2, 3 Looking at the grammar, these appear to be `expr` or `exprlist` targets. One change may be to allow arbitrary expressions to have an annotation . This would be a small change to the grammar but would potentially have a large effect on the language or static analysis tools. I am posting on the mailing list to see if this is a real problem, and if so, is it worth investing any time to address it. I would be happy to attempt to fix this, but I don't want to start if people don't want the change. Also, I apologize if this should have gone to python-idea; this feels somewhere between a bug report and implementation question more than a new feature so I wasn't sure which list would be more appropriate.

3 3

Merging the implementation of PEP 563
by Lukasz Langa 25 Jan '18

25 Jan '18

Hi all, Serhiy looks busy these days. I'd appreciate somebody looking at and hopefully merging https://github.com/python/cpython/pull/4390 <https://github.com/python/cpython/pull/4390>. Everything there was reviewed by Serhiy except for the latest commit. This should be ready to merge and maybe tweak in the beta stage. I'd like to avoid merging it myself but I'd really hate missing the deadline. - Ł

3 2

CLion IDE
by Steve Holden 25 Jan '18

25 Jan '18

I've just start using CLion from JetBrains, and I wondered if anyone on the list is using this product in CPython development. Links to any guidance would be useful. regards Steve Holden

2 1

PEP 432 progress: Python initalization
by Victor Stinner 24 Jan '18

24 Jan '18

Hi, Serhiy Storchaka seems to be worried by the high numbers of commits in https://bugs.python.org/issue32030 "PEP 432: Rewrite Py_Main()", so let me explain the context of this work :-) To prepare CPython to implement my UTF-8 Mode PEP (PEP 540), I worked on the implementation of Nick Coghlan's PEP 432: PEP 432 -- Restructuring the CPython startup sequence https://www.python.org/dev/peps/pep-0432/ The startup sequence is a big pile of code made of multiple functions: main(), Py_Main(), Py_Initialize(), Py_Finalize()... and a lot of tiny "configuration" functions like Py_SetPath(). Over the years, many configuration options were added in the middle of the code. The priority of configuration options is not always correct between command line options, envrionment variables, configuration files (like "pyenv.cfg"), etc. For technical reasons, it's hard to impement properly the -E option (ignore PYTHON* environment variables). For example, the new PYTHONCOERCECLOCALE environment variable (of PEP 538) doesn't handle properly -E (it ignores -E), because it was too complex to support -E. -- I'm working on fixing this. Last weeks, I mostly worked on the Py_Main() function, Modules/getpath.c and PC/getpathp.c, to "refactor" the code: * Split big functions (300 to 500 lines) into multiple small functions (50 lines or less), to make it easily to follow the control flow and to allow to more easily move code * Replace static and global variables with memory allocated on the heap. * Reorganize how the configuration is read: populate a first temporary structure (_PyMain using wchar_t*), then create Python objects (_PyMainInterpreterConfig) to finish with the real configuration (like setting attributes of the sys module). The goal is to centralize all code reading configuration to fix the priority and to simplify the code. My motivation was to write a correct implementation of the UTF-8 Mode (PEP 540). Nick's motivation is to make CPython easily to embed. His plan for Python 3.8 is to give access to the new _PyCoreConfig and _PyMainInterpreterConfig structures to: * easily give access to most (if not all?) configuration options to "embedders" * allow to configure Python without environment variables, command line options, configuration files, but only using these structures * allow to configure Python using Python objects (PyObject*) rather than C types (like wchar_t*) (I'm not sure that I understood correctly, so please read the PEP 432 ;-)) IMHO the most visible change of the PEP 432 is to split Python initialization in two parts: * Core: strict minimum to use the Python C API * Main: everything else The goal is to introduce the opportunity to configure Python between Core and Main. The implementation is currently a work-in-progress. Nick will not have the bandwidth, neither do I, to update his PEP and finish the implementation, before Python 3.7. So this work remains private until at least Python 3.8. Another part of the work is to enhance the documentation. You can for example now find an explicit list of C functions which can be called before Py_Initialize(): https://docs.python.org/dev/c-api/init.html#before-python-initialization And also a list of functions that must not be called before Py_Initialize(), whereas you might want to call them :-) Victor

2 4

Intention to accept PEP 567 (Context Variables)
by Guido van Rossum 23 Jan '18

23 Jan '18

There has been useful and effective discussion on several of the finer points of PEP 567. I think we've arrived at a solid specification, where every part of the design is well motivated. I plan to accept it on Monday, unless someone brings up something significant that we've overlooked before then. Please don't rehash issues that have already been debated -- we're unlikely to reach a different conclusion upon revisiting the same issue (read the Rejected Ideas section first). -- --Guido van Rossum (python.org/~guido)

6 6

Support of the Android platform
by Xavier de Gaye 23 Jan '18

23 Jan '18

The following note is a proposal to add the support of the Android platform. The note is easier to read with clickable links at https://github.com/xdegaye/cagibi/blob/master/doc/android_support.rst Motivations =========== * Android is ubiquitous. * This would be the first platform supported by Python that is cross-compiled, thanks to many contributors. * Although the Android operating system is linux, it is different from most linux platforms, for example it does not use GNU libc and runs SELinux in enforcing mode. Therefore supporting this platform would make Python more robust and also would allow testing it on arm 64-bit processors. * Python running on Android is also a handheld calculator, a successor of the slide rule and the `HP 41`_. Current status ============== * The Python test suite succeeds when run on Android emulators using buildbot strenuous settings with the following architectures on API 24: x86, x86_64, armv7 and arm64. * The `Android build system`_ is described in another section. * The `buildmaster-config PR 26`_ proposes to update ``master.cfg`` to enable buildbots to run a given Android API and architecture on the emulators. * The Android emulator is actually ``qemu``, so the test suites for x86 and x86_64 last about the same time as the test suite run natively when the processor of the build system is of the x86 family. The test suites for the arm architectures last much longer: about 8 hours for arm64 and 10 hours for armv7 on a four years old laptop. * The changes that have been made to achieve this status are listed in `bpo-26865`_, the Android meta-issue. * Given the cpu resources required to run the test suite on the arm emulators, it may be difficult to find a contributed buildbot worker. So it remains to find the hardware to run these buildbots. Proposal ======== Support the Android platform on API 24 [1]_ for the x86_64, armv7 and arm64 architectures built with NDK 14b. *API 24* * API 21 is the first version to provide usable support for wide characters and where SELinux is run in enforcing mode. * API 22 introduces an annoying bug on the linker that prints something like this when python is started:: ``WARNING: linker: libpython3.6m.so.1.0: unused DT entry: type 0x6ffffffe arg 0x14554``. The `termux`_ Android terminal emulator describes this problem at the end of its `termux-packages`_ gitlab page and has implemented a ``termux-elf-cleaner`` tool to strip the useless entries from the ELF header of executables. * API 24 is the first version where the `adb`_ shell is run on the emulator as a ``shell`` user instead of the ``root`` user previously, and the first version that supports arm64. *x86_64* It seems that no handheld device exists using that architecture. It is supported because the x86_64 Android emulator runs fast and therefore is a good candidate as a buildbot worker. *NDK 14b* This release of the NDK is the first one to use `Unified headers`_ fixing numerous problems that had been fixed by updating the Python configure script until now (those changes have been reverted by now). Android idiosyncrasies ====================== * The default shell is ``/system/bin/sh``. * The file system layout is not a traditional unix layout, there is no ``/tmp`` for example. Most directories have user restricted access, ``/sdcard`` is mounted as ``noexec`` for example. * The (java) applications are allocated a unix user id and a subdirectory on ``/data/data``. * SELinux is run in enforcing mode. * Shared memory and semaphores are not supported. * The default encoding is UTF-8. Android build system ==================== The Android build system is implemented at `bpo-30386`_ with `PR 1629`_ and is documented by its `README`_. It provides the following features: * To build a distribution for a device or an emulator with a given API level and a given architecture. * To start the emulator and + install the distribution + start a remote interactive shell + or run remotely a python command + or run remotely the buildbottest * Run gdb on the python process that is running on the emulator with python pretty-printing. The build system adds the ``Android/`` directory and the ``configure-android`` script to the root of the Python source directory on the master branch without modifying any other file. The build system can be installed, upgraded (i.e. the SDK and NDK) and run remotely, through ssh for example. The following external libraries, when they are configured in the build system, are downloaded from the internet and cross-compiled (only once, on the first run of the build system) before the cross-compilation of the extension modules: * ``ncurses`` * ``readline`` * ``sqlite`` * ``libffi`` * ``openssl``, the cross-compilation of openssl fails on x86_64 and arm64 and this step is skipped on those architectures. The following extension modules are disabled by adding them to the ``*disabled*`` section of ``Modules/Setup``: * ``_uuid``, Android has no uuid/uuid.h header. * ``grp`` some grp.h functions are not declared. * ``_crypt``, Android does not have crypt.h. * ``_ctypes`` on x86_64 where all long double tests fail (`bpo-32202`_) and on arm64 (see `bpo-32203`_). .. [1] On Wikipedia `Android version history`_ lists the correspondence between API level, commercial name and version for each release. It also provides information on the global Android version distribution, see the two charts on top. .. _`README`: https://github.com/xdegaye/cpython/blob/bpo-30386/Android/README.rst .. _`bpo-26865`: https://bugs.python.org/issue26865 .. _`bpo-30386`: https://bugs.python.org/issue30386 .. _`bpo-32202`: https://bugs.python.org/issue32202 .. _`bpo-32203`: https://bugs.python.org/issue32203 .. _`PR 1629`: https://github.com/python/cpython/pull/1629 .. _`buildmaster-config PR 26`: https://github.com/python/buildmaster-config/pull/26 .. _`Android version history`: https://en.wikipedia.org/wiki/Android_version_history .. _`termux`: https://termux.com/ .. _`termux-packages`: https://gitlab.com/jbwhips883/termux-packages .. _`adb`: https://developer.android.com/studio/command-line/adb.html .. _`Unified headers`: https://android.googlesource.com/platform/ndk.git/+/ndk-r14-release/docs/Un… .. _`HP 41`: https://en.wikipedia.org/wiki/HP-41C .. vim:filetype=rst:tw=78:ts=8:sts=2:sw=2:et:

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[RELEASED] Python 3.4.8rc1 and Python 3.5.5rc1 are now available
by Larry Hastings 23 Jan '18

23 Jan '18

On behalf of the Python development community, I'm pleased to announce the availability of Python 3.4.8rc1 and Python 3.5.5rc1. Both Python 3.4 and 3.5 are in "security fixes only" mode. Both versions only accept security fixes, not conventional bug fixes, and both releases are source-only. You can find Python 3.4.8rc1 here: https://www.python.org/downloads/release/python-348rc1/ And you can find Python 3.5.5rc1 here: https://www.python.org/downloads/release/python-355rc1/ Happy Pythoning, //arry/

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Positional-only parameters in Python
by Victor Stinner 22 Jan '18

22 Jan '18

Hi, In Februrary 2017, I proposed on python-ideas to change the Python syntax to allow to declare positional-only parameters in Python: https://mail.python.org/pipermail/python-ideas/2017-February/044879.html https://mail.python.org/pipermail/python-ideas/2017-March/044956.html There are already supported at the C level, but not at the Python level. Our BDFL approved the idea: https://mail.python.org/pipermail/python-ideas/2017-March/044959.html But I didn't find time to implement it. Does someone want to work on an implementation of the idea? March 2, 2017 7:16 PM, "Brett Cannon" <brett at python.org> wrote: > It seems all the core devs who have commented on this are in the positive > (Victor, Yury, Ethan, Yury, Guido, Terry, and Steven; MAL didn't explicitly > vote). So to me that suggests there's enough support to warrant writing a > PEP. Are you up for writing it, Victor, or is someone else going to write > it? It seems like a PEP is needed. Victor

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