Mailman 3 November 2018 - Python-Dev

Get a running instance of the doc for a PR.
by Stephane Wirtel 17 Nov '18

17 Nov '18

Hi all, When we receive a PR about the documentation, I think that could be interesting if we could have a running instance of the doc on a sub domain of python.org. For example, pr-10000-doc.python.org or whatever, but by this way the reviewers could see the result online. The workflow would be like that: New PR -> build the doc (done by Travis) -> publish it to a server -> once published, the PR is notified by "doc is available at URL". Once merged -> we remove the doc and the link (hello bedevere). I am interested by this feature and if you also interested, tell me. I would like discuss with Julien Palard and Ernest W. Durbin III for a solution as soon as possible. Have a nice day, Stéphane -- Stéphane Wirtel - https://wirtel.be - @matrixise

14 36

Summary of Python tracker Issues
by Python tracker 17 Nov '18

17 Nov '18

ACTIVITY SUMMARY (2018-11-09 - 2018-11-16) 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 6863 (+29) closed 40154 (+36) total 47017 (+65) Open issues with patches: 2741 Issues opened (46) ================== #31354: Fixing a bug related to LTO only build https://bugs.python.org/issue31354 reopened by ned.deily #33826: enable discovery of class source code in IPython interactively https://bugs.python.org/issue33826 reopened by xtreak #35177: Add missing dependencies between AST/parser header files https://bugs.python.org/issue35177 reopened by vstinner #35202: Remove unused imports in standard library https://bugs.python.org/issue35202 opened by thatiparthy #35203: Windows Installer Ignores Launcher Installer Options Where The https://bugs.python.org/issue35203 opened by gr-dexterl #35206: [WIP] Add a new experimental _Py_CAPI2 API https://bugs.python.org/issue35206 opened by vstinner #35208: IDLE: Squeezed lines count ignores window width https://bugs.python.org/issue35208 opened by taleinat #35210: Use bytes + memoryview + resize instead of bytesarray + array https://bugs.python.org/issue35210 opened by tzickel #35212: Expressions with format specifiers in f-strings give wrong cod https://bugs.python.org/issue35212 opened by arminius #35213: IDLE: use 'macOS' where appropriate. https://bugs.python.org/issue35213 opened by terry.reedy #35214: Get the test suite passing with clang Memory Sanitizer enabled https://bugs.python.org/issue35214 opened by gregory.p.smith #35216: misleading error message from shutil.copy() https://bugs.python.org/issue35216 opened by cedricvanrompay #35217: REPL history is broken when python is invoked with cmd /c https://bugs.python.org/issue35217 opened by 零欸特 #35218: decompressing and then re-compressing zipfiles with Python 3 z https://bugs.python.org/issue35218 opened by keeely #35220: delete "how do I emulate os.kill" section in Windows FAQ https://bugs.python.org/issue35220 opened by deronnax #35221: Enhance venv activate commands readability https://bugs.python.org/issue35221 opened by mdk #35224: PEP 572: Assignment Expressions https://bugs.python.org/issue35224 opened by emilyemorehouse #35225: test_faulthandler fails under ubsan https://bugs.python.org/issue35225 opened by benjamin.peterson #35226: mock.call equality surprisingly broken https://bugs.python.org/issue35226 opened by cjw296 #35227: [RFE] tarfile: support adding file objects without prior known https://bugs.python.org/issue35227 opened by mgorny #35228: Index search in CHM help crashes viewer https://bugs.python.org/issue35228 opened by chrullrich #35231: make install may not call ldconfig on GNU/Linux when using --e https://bugs.python.org/issue35231 opened by pmpp #35232: Add `module`/`qualname` arguments to make_dataclass for pickla https://bugs.python.org/issue35232 opened by Antony.Lee #35234: ssl module falls over with internationalized domain names https://bugs.python.org/issue35234 opened by mcasadevall #35235: Access violation on alloc in Windows x86-64 python, pymalloc_a https://bugs.python.org/issue35235 opened by markind #35236: urllib.request.urlopen throws on some valid FTP files https://bugs.python.org/issue35236 opened by Ian Liu Rodrigues #35238: Alleviate memory reservation of fork_exec in subprocess.Popen https://bugs.python.org/issue35238 opened by oesteban #35240: Travis CI: xvfb-run: error: Xvfb failed to start https://bugs.python.org/issue35240 opened by vstinner #35242: multiprocessing.Queue in an inconsistent state and a traceback https://bugs.python.org/issue35242 opened by szobov #35243: readline timeout too long for async gfx use https://bugs.python.org/issue35243 opened by pmpp #35244: Allow to setup Clang as default compiler for modules build https://bugs.python.org/issue35244 opened by Jaime Torres #35246: asyncio.create_subprocess_exec doesn't accept pathlib.Path lik https://bugs.python.org/issue35246 opened by lilydjwg #35247: test.test_socket.RDSTest.testPeek hangs indefinitely https://bugs.python.org/issue35247 opened by markmcclain #35248: RawArray causes FileNotFoundError at cleanup https://bugs.python.org/issue35248 opened by Mathieu Lamarre #35250: Minor parameter documentation mismatch for turtle https://bugs.python.org/issue35250 opened by Shane Smith #35251: FTPHandler.ftp_open documentation error https://bugs.python.org/issue35251 opened by lys.nikolaou #35252: test_functools dead code after FIXME https://bugs.python.org/issue35252 opened by lys.nikolaou #35253: Linker warning LNK4281 https://bugs.python.org/issue35253 opened by neyuru #35255: delete "How do I extract the downloaded documentation" section https://bugs.python.org/issue35255 opened by deronnax #35257: Add LDFLAGS_NODIST for the LDFLAGS not intended for propagatio https://bugs.python.org/issue35257 opened by cstratak #35258: Consider enabling -Wmissing-prototypes https://bugs.python.org/issue35258 opened by izbyshev #35259: Py_FinalizeEx unconditionally exists in Py_LIMITED_API https://bugs.python.org/issue35259 opened by AJNeufeld #35263: Add None handling for get_saved() in IDLE https://bugs.python.org/issue35263 opened by rhettinger #35264: SSL Module build fails with OpenSSL 1.1.0 for Python 2.7 https://bugs.python.org/issue35264 opened by Alexandru Ardelean #35265: Internal C API: pass the memory allocator in a context https://bugs.python.org/issue35265 opened by vstinner #35266: Add _PyPreConfig and rework _PyCoreConfig and _PyMainInterpret https://bugs.python.org/issue35266 opened by vstinner Most recent 15 issues with no replies (15) ========================================== #35266: Add _PyPreConfig and rework _PyCoreConfig and _PyMainInterpret https://bugs.python.org/issue35266 #35265: Internal C API: pass the memory allocator in a context https://bugs.python.org/issue35265 #35264: SSL Module build fails with OpenSSL 1.1.0 for Python 2.7 https://bugs.python.org/issue35264 #35263: Add None handling for get_saved() in IDLE https://bugs.python.org/issue35263 #35259: Py_FinalizeEx unconditionally exists in Py_LIMITED_API https://bugs.python.org/issue35259 #35258: Consider enabling -Wmissing-prototypes https://bugs.python.org/issue35258 #35255: delete "How do I extract the downloaded documentation" section https://bugs.python.org/issue35255 #35251: FTPHandler.ftp_open documentation error https://bugs.python.org/issue35251 #35246: asyncio.create_subprocess_exec doesn't accept pathlib.Path lik https://bugs.python.org/issue35246 #35243: readline timeout too long for async gfx use https://bugs.python.org/issue35243 #35238: Alleviate memory reservation of fork_exec in subprocess.Popen https://bugs.python.org/issue35238 #35236: urllib.request.urlopen throws on some valid FTP files https://bugs.python.org/issue35236 #35232: Add `module`/`qualname` arguments to make_dataclass for pickla https://bugs.python.org/issue35232 #35231: make install may not call ldconfig on GNU/Linux when using --e https://bugs.python.org/issue35231 #35228: Index search in CHM help crashes viewer https://bugs.python.org/issue35228 Most recent 15 issues waiting for review (15) ============================================= #35266: Add _PyPreConfig and rework _PyCoreConfig and _PyMainInterpret https://bugs.python.org/issue35266 #35265: Internal C API: pass the memory allocator in a context https://bugs.python.org/issue35265 #35264: SSL Module build fails with OpenSSL 1.1.0 for Python 2.7 https://bugs.python.org/issue35264 #35263: Add None handling for get_saved() in IDLE https://bugs.python.org/issue35263 #35255: delete "How do I extract the downloaded documentation" section https://bugs.python.org/issue35255 #35252: test_functools dead code after FIXME https://bugs.python.org/issue35252 #35250: Minor parameter documentation mismatch for turtle https://bugs.python.org/issue35250 #35236: urllib.request.urlopen throws on some valid FTP files https://bugs.python.org/issue35236 #35226: mock.call equality surprisingly broken https://bugs.python.org/issue35226 #35224: PEP 572: Assignment Expressions https://bugs.python.org/issue35224 #35218: decompressing and then re-compressing zipfiles with Python 3 z https://bugs.python.org/issue35218 #35214: Get the test suite passing with clang Memory Sanitizer enabled https://bugs.python.org/issue35214 #35213: IDLE: use 'macOS' where appropriate. https://bugs.python.org/issue35213 #35210: Use bytes + memoryview + resize instead of bytesarray + array https://bugs.python.org/issue35210 #35208: IDLE: Squeezed lines count ignores window width https://bugs.python.org/issue35208 Top 10 most discussed issues (10) ================================= #34160: ElementTree not preserving attribute order https://bugs.python.org/issue34160 20 msgs #35195: [Windows] Python 3.7 initializes LC_CTYPE locale at startup, c https://bugs.python.org/issue35195 19 msgs #35214: Get the test suite passing with clang Memory Sanitizer enabled https://bugs.python.org/issue35214 16 msgs #35196: IDLE text squeezer is too aggressive and is slow https://bugs.python.org/issue35196 15 msgs #33725: Python crashes on macOS after fork with no exec https://bugs.python.org/issue33725 10 msgs #35202: Remove unused imports in standard library https://bugs.python.org/issue35202 10 msgs #35200: Range repr could be better https://bugs.python.org/issue35200 9 msgs #35213: IDLE: use 'macOS' where appropriate. https://bugs.python.org/issue35213 9 msgs #33196: multiprocessing: serialization must ensure that contexts are c https://bugs.python.org/issue33196 8 msgs #35081: Move internal headers to Include/internal/ https://bugs.python.org/issue35081 8 msgs Issues closed (38) ================== #23220: IDLE: Document how Shell displays user code output https://bugs.python.org/issue23220 closed by terry.reedy #23734: zipimport should not check pyc timestamps against zipped py fi https://bugs.python.org/issue23734 closed by gregory.p.smith #28709: PyStructSequence_NewType is broken; makes GC type without sett https://bugs.python.org/issue28709 closed by petr.viktorin #30064: BaseSelectorEventLoop.sock_{recv,sendall}() don't remove their https://bugs.python.org/issue30064 closed by asvetlov #31541: Mock called_with does not ensure self/cls argument is used https://bugs.python.org/issue31541 closed by pablogsal #32429: Outdated Modules/Setup warning is invisible https://bugs.python.org/issue32429 closed by mdk #32485: Multiprocessing dict sharing between forked processes https://bugs.python.org/issue32485 closed by pitrou #32613: Use PEP 397 py launcher in windows faq https://bugs.python.org/issue32613 closed by mdk #33052: Sporadic segmentation fault in test_datetime.test_check_arg_ty https://bugs.python.org/issue33052 closed by vstinner #33695: Have shutil.copytree(), copy() and copystat() use cached scand https://bugs.python.org/issue33695 closed by giampaolo.rodola #33699: Don't describe try's else clause in a footnote https://bugs.python.org/issue33699 closed by Mariatta #33878: Doc: Assignment statement to tuple or list: case missing. https://bugs.python.org/issue33878 closed by mdk #34864: In Idle, Mac tabs make editor status line disappear. https://bugs.python.org/issue34864 closed by terry.reedy #34949: ntpath.abspath no longer uses normpath https://bugs.python.org/issue34949 closed by eryksun #35193: Off by one error in peephole call to find_op on case RETURN_VA https://bugs.python.org/issue35193 closed by gregory.p.smith #35199: Convert PyTuple_GET_ITEM() macro to a function call with addit https://bugs.python.org/issue35199 closed by vstinner #35204: Disable thread and memory sanitizers for address_in_range() https://bugs.python.org/issue35204 closed by benjamin.peterson #35205: os.path.realpath preserves the trailing backslash on Windows i https://bugs.python.org/issue35205 closed by eryksun #35207: Disallow expressions like (a) = 42 https://bugs.python.org/issue35207 closed by pablogsal #35209: Crash with tkinter text on osx https://bugs.python.org/issue35209 closed by ned.deily #35211: Turtle Shutdown Problem(s) https://bugs.python.org/issue35211 closed by ned.deily #35215: Replacing CPython memory allocation https://bugs.python.org/issue35215 closed by pablogsal #35219: macOS 10.14 Mojave crashes in multiprocessing https://bugs.python.org/issue35219 closed by barry #35222: email.utils.formataddr is not exactly the reverse of email.uti https://bugs.python.org/issue35222 closed by r.david.murray #35223: Pathlib incorrectly merges strings. https://bugs.python.org/issue35223 closed by eryksun #35229: Deprecate _PyObject_GC_TRACK() in Python 3.6 https://bugs.python.org/issue35229 closed by vstinner #35230: Remove _Py_REF_DEBUG_COMMA https://bugs.python.org/issue35230 closed by inada.naoki #35233: _PyMainInterpreterConfig_Copy() doesn't copy install_signal_ha https://bugs.python.org/issue35233 closed by vstinner #35237: Allow Path instances in sys.path ? https://bugs.python.org/issue35237 closed by ammar2 #35239: _PySys_EndInit() doesn't copy main interpreter configuration https://bugs.python.org/issue35239 closed by vstinner #35241: [3.7] test_embed fails on MacOS buildbots https://bugs.python.org/issue35241 closed by vstinner #35245: list comprehension for flattened or nested list differ too muc https://bugs.python.org/issue35245 closed by steven.daprano #35249: Docs Makefile always rebuilds entire doc https://bugs.python.org/issue35249 closed by seluj78 #35254: Process finished with exit code -1073741795 (0xC000001D) https://bugs.python.org/issue35254 closed by eryksun #35256: The Console of Python 3.7.0. https://bugs.python.org/issue35256 closed by eric.smith #35260: 2to3 Parse Error on Python 3 print() with arguments https://bugs.python.org/issue35260 closed by mark.dickinson #35261: readline.c: PyOS_InputHook not protected against SIGWINCH https://bugs.python.org/issue35261 closed by vstinner #35262: There should be a list.get just like dict.get https://bugs.python.org/issue35262 closed by rhettinger

1 0

Clarify required Visual C++ compiler for binary extensions in 3.7
by Maik Riechert 15 Nov '18

15 Nov '18

Hi, I just wanted to point out that the page https://wiki.python.org/moin/WindowsCompilers doesn't mention Python 3.7 in the table. Is the compiler still Visual C++ 14.0? Thanks Maik

2 2

Re: [Python-Dev] General concerns about C API changes
by Jeroen Demeyer 14 Nov '18

14 Nov '18

On 2018-11-14 04:06, Raymond Hettinger wrote: > With cross module function calls, I'm less confident about what is happening If the functions are "static inline" (as opposed to plain "inline"), those aren't really cross-module function calls. Because the functions are "static" and defined in a header file, every module has its own copy of the function. If the function is not inlined in the end, this would inflate the compiled size because you end up with multiple compilations of the same code in the CPython library. It would not affect correct functioning in any way though. If the function *is* inlined, then the result should be no different from using a macro. Jeroen.

1 0

Signalling NANs
by Steven D'Aprano 12 Nov '18

12 Nov '18

I'm trying to understand some unexpected behaviour with float NANs in Python 3.5. Background: in IEEE-754 maths, NANs (Not A Number) come in two flavours, so called "quiet NANs" and "signalling NANs". By default, arithmetic operations on qnans return a qnan; operations on snans "signal", which in Python terms means raising an exception. The original IEEE-754 standard didn't specify how to distinguish a qnan from a snan, but a de facto standard arose that bit 51 of the float was the "quiet bit", if it were set, the NAN was quiet. For the purposes of this email, I'm going to assume that standard is in place, even though technically speaking it is platform-dependent. According to my tests, it seems that we cannot create snans in Python. The float constructor doesn't recognise "snan", raising ValueError. Nor can we convert a Decimal snan into a float: py> from decimal import Decimal py> snan = Decimal('snan') py> float(dsnan) Traceback (most recent call last): File "<stdin>", line 1, in <module> ValueError: cannot convert signaling NaN to float But unexpectedly (to me at least), we apparently cannot even create a signalling NAN by casting 64 bits to a float. Here are the functions I use to do the cast: from struct import pack, unpack def cast_float2int(x): return unpack('<Q', pack('<d', x))[0] def cast_int2float(i): return unpack('<d', pack('<Q', i))[0] Here's a regular quiet NAN round-tripping, as expected: py> x = cast_int2float(0x7ff8000000000001) py> x nan py> hex(cast_float2int(x)) '0x7ff8000000000001' So far so good. But now let me try with a signalling NAN: py> x = cast_int2float(0x7ff0000000000001) py> x nan py> hex(cast_float2int(x)) '0x7ff8000000000001' So it seems that the "quiet" bit is automatically set, even when using the struct module, making it impossible to create snan floats. Is this intended? If so, why? Is this meant as a language feature? Thanks in advance, Steve

5 6

Summary of Python tracker Issues
by Python tracker 10 Nov '18

10 Nov '18

ACTIVITY SUMMARY (2018-11-02 - 2018-11-09) 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 6834 ( +6) closed 40118 (+47) total 46952 (+53) Open issues with patches: 2726 Issues opened (42) ================== #10536: Enhancements to gettext docs https://bugs.python.org/issue10536 reopened by serhiy.storchaka #32409: venv activate.bat is UTF-8 encoded but uses current console co https://bugs.python.org/issue32409 reopened by pablogsal #33486: regen autotools related files https://bugs.python.org/issue33486 reopened by ned.deily #34011: Default preference not given to venv DLL's https://bugs.python.org/issue34011 reopened by pablogsal #35145: sqlite3: "select *" should optionally sniff and autoconvert TE https://bugs.python.org/issue35145 reopened by matrixise #35149: pip3 show causing Error for ConfigParaser https://bugs.python.org/issue35149 opened by mdileep #35151: Python 2 xml.etree.ElementTree documentation tutorial uses und https://bugs.python.org/issue35151 opened by epakai #35153: Allow to set headers in xmlrpc.client.ServerProxy https://bugs.python.org/issue35153 opened by ced #35155: Clarify Protocol Handlers in urllib.request Docs https://bugs.python.org/issue35155 opened by Denton-L #35156: Consider revising documentation on Python Builds from source https://bugs.python.org/issue35156 opened by neyuru #35157: Missing pyconfig.h when building from source and pgo flag is e https://bugs.python.org/issue35157 opened by neyuru #35158: Fix PEP 3115 to NOT imply that the class dictionary is used in https://bugs.python.org/issue35158 opened by joydiamond #35163: locale: setlocale(..., 'eo') sets non-existing locale https://bugs.python.org/issue35163 opened by carmenbianca #35164: socket.getfqdn and socket.gethostbyname fail on MacOS https://bugs.python.org/issue35164 opened by ssbarnea #35165: Possible wrong method name in attribute references doc https://bugs.python.org/issue35165 opened by denis-osipov #35166: BUILD_MAP_UNPACK doesn't function as expected for dict subclas https://bugs.python.org/issue35166 opened by bup #35168: shlex punctuation_chars inconsistency https://bugs.python.org/issue35168 opened by tphh #35169: Improve error messages for assignment https://bugs.python.org/issue35169 opened by serhiy.storchaka #35172: Add support for other MSVC compiler versions to distutils. dis https://bugs.python.org/issue35172 opened by Ali Rizvi-Santiago #35173: Re-use already existing functionality to allow Python 2.7.x (b https://bugs.python.org/issue35173 opened by Ali Rizvi-Santiago #35174: Calling for super().__str__ seems to call self.__repr__ in lis https://bugs.python.org/issue35174 opened by Camion #35177: Add missing dependencies between AST/parser header files https://bugs.python.org/issue35177 opened by vstinner #35178: Typo/trivial mistake in warnings.py (may be related to 2.x to https://bugs.python.org/issue35178 opened by tashrifbillah #35181: Doc: Namespace Packages: Inconsistent documentation of __loade https://bugs.python.org/issue35181 opened by mdk #35182: Popen.communicate() breaks when child closes its side of pipe https://bugs.python.org/issue35182 opened by and800 #35183: os.path.splitext documentation needs typical example https://bugs.python.org/issue35183 opened by shaungriffith #35184: Makefile is not correctly generated when compiling pyextat wit https://bugs.python.org/issue35184 opened by mgmacias95 #35185: Logger race condition - loses lines if removeHandler called fr https://bugs.python.org/issue35185 opened by benspiller #35186: distutils.command.upload uses deprecated platform.dist with bd https://bugs.python.org/issue35186 opened by p-ganssle #35189: PEP 475: fnctl functions are not retried if interrupted by a s https://bugs.python.org/issue35189 opened by akeskimo #35190: collections.abc.Sequence cannot be used to test whether a clas https://bugs.python.org/issue35190 opened by hroncok #35191: socket.setblocking(x) treats multiples of 2**32 as False https://bugs.python.org/issue35191 opened by izbyshev #35192: pathlib mkdir throws FileExistsError when not supposed to https://bugs.python.org/issue35192 opened by Adam Dunlap #35193: Off by one error in peephole call to find_op on case RETURN_VA https://bugs.python.org/issue35193 opened by gregory.p.smith #35194: A typo in a constant in cp932 codec https://bugs.python.org/issue35194 opened by izbyshev #35195: Pandas read_csv() is 3.5X Slower on Python 3.7.1 vs Python 3.6 https://bugs.python.org/issue35195 opened by Dragoljub #35196: IDLE text squeezer is too aggressive and is slow https://bugs.python.org/issue35196 opened by rhettinger #35197: graminit.h defines very generic names like 'stmt' or 'test' https://bugs.python.org/issue35197 opened by vstinner #35198: Build issue while compiling cpp files in AIX https://bugs.python.org/issue35198 opened by Ayappan #35199: Convert PyTuple_GET_ITEM() macro to a function call with addit https://bugs.python.org/issue35199 opened by vstinner #35200: Range repr could be better https://bugs.python.org/issue35200 opened by mdk #35201: Recursive '**' matches non-existent directories. https://bugs.python.org/issue35201 opened by daniel Most recent 15 issues with no replies (15) ========================================== #35201: Recursive '**' matches non-existent directories. https://bugs.python.org/issue35201 #35198: Build issue while compiling cpp files in AIX https://bugs.python.org/issue35198 #35195: Pandas read_csv() is 3.5X Slower on Python 3.7.1 vs Python 3.6 https://bugs.python.org/issue35195 #35191: socket.setblocking(x) treats multiples of 2**32 as False https://bugs.python.org/issue35191 #35186: distutils.command.upload uses deprecated platform.dist with bd https://bugs.python.org/issue35186 #35185: Logger race condition - loses lines if removeHandler called fr https://bugs.python.org/issue35185 #35184: Makefile is not correctly generated when compiling pyextat wit https://bugs.python.org/issue35184 #35183: os.path.splitext documentation needs typical example https://bugs.python.org/issue35183 #35177: Add missing dependencies between AST/parser header files https://bugs.python.org/issue35177 #35173: Re-use already existing functionality to allow Python 2.7.x (b https://bugs.python.org/issue35173 #35172: Add support for other MSVC compiler versions to distutils. dis https://bugs.python.org/issue35172 #35169: Improve error messages for assignment https://bugs.python.org/issue35169 #35163: locale: setlocale(..., 'eo') sets non-existing locale https://bugs.python.org/issue35163 #35158: Fix PEP 3115 to NOT imply that the class dictionary is used in https://bugs.python.org/issue35158 #35155: Clarify Protocol Handlers in urllib.request Docs https://bugs.python.org/issue35155 Most recent 15 issues waiting for review (15) ============================================= #35200: Range repr could be better https://bugs.python.org/issue35200 #35199: Convert PyTuple_GET_ITEM() macro to a function call with addit https://bugs.python.org/issue35199 #35197: graminit.h defines very generic names like 'stmt' or 'test' https://bugs.python.org/issue35197 #35194: A typo in a constant in cp932 codec https://bugs.python.org/issue35194 #35193: Off by one error in peephole call to find_op on case RETURN_VA https://bugs.python.org/issue35193 #35191: socket.setblocking(x) treats multiples of 2**32 as False https://bugs.python.org/issue35191 #35189: PEP 475: fnctl functions are not retried if interrupted by a s https://bugs.python.org/issue35189 #35186: distutils.command.upload uses deprecated platform.dist with bd https://bugs.python.org/issue35186 #35181: Doc: Namespace Packages: Inconsistent documentation of __loade https://bugs.python.org/issue35181 #35177: Add missing dependencies between AST/parser header files https://bugs.python.org/issue35177 #35173: Re-use already existing functionality to allow Python 2.7.x (b https://bugs.python.org/issue35173 #35172: Add support for other MSVC compiler versions to distutils. dis https://bugs.python.org/issue35172 #35169: Improve error messages for assignment https://bugs.python.org/issue35169 #35155: Clarify Protocol Handlers in urllib.request Docs https://bugs.python.org/issue35155 #35153: Allow to set headers in xmlrpc.client.ServerProxy https://bugs.python.org/issue35153 Top 10 most discussed issues (10) ================================= #34805: Explicitly specify `MyClass.__subclasses__()` returns classes https://bugs.python.org/issue34805 11 msgs #35194: A typo in a constant in cp932 codec https://bugs.python.org/issue35194 10 msgs #35113: inspect.getsource returns incorrect source for classes when cl https://bugs.python.org/issue35113 9 msgs #35145: sqlite3: "select *" should optionally sniff and autoconvert TE https://bugs.python.org/issue35145 9 msgs #32409: venv activate.bat is UTF-8 encoded but uses current console co https://bugs.python.org/issue32409 8 msgs #34155: email.utils.parseaddr mistakenly parse an email https://bugs.python.org/issue34155 7 msgs #35105: Document that CPython accepts "invalid" identifiers https://bugs.python.org/issue35105 7 msgs #35131: Cannot access to customized paths within .pth file https://bugs.python.org/issue35131 7 msgs #35157: Missing pyconfig.h when building from source and pgo flag is e https://bugs.python.org/issue35157 7 msgs #35104: IDLE: On macOS, Command-M minimizes & opens "Open Module..." https://bugs.python.org/issue35104 6 msgs Issues closed (48) ================== #2504: Add gettext.pgettext() and variants support https://bugs.python.org/issue2504 closed by serhiy.storchaka #17560: problem using multiprocessing with really big objects? https://bugs.python.org/issue17560 closed by pitrou #19675: Pool dies with excessive workers, but does not cleanup https://bugs.python.org/issue19675 closed by mdk #21263: test_gdb failures on os x 10.9.2 https://bugs.python.org/issue21263 closed by ned.deily #25711: Rewrite zipimport from scratch https://bugs.python.org/issue25711 closed by serhiy.storchaka #29341: Missing accepting path-like object in docstrings of os module https://bugs.python.org/issue29341 closed by pablogsal #31553: Extend json.tool to handle jsonlines (with a flag) https://bugs.python.org/issue31553 closed by serhiy.storchaka #31583: 2to3 call for file in current directory yields error https://bugs.python.org/issue31583 closed by denis-osipov #32285: In `unicodedata`, it should be possible to check a unistr's no https://bugs.python.org/issue32285 closed by benjamin.peterson #32512: Add an option to profile to run library module as a script https://bugs.python.org/issue32512 closed by mariocj89 #33000: IDLE Doc: Text consumes unlimited RAM, consoles likely not https://bugs.python.org/issue33000 closed by terry.reedy #33275: glob.glob should explicitly note that results aren't sorted https://bugs.python.org/issue33275 closed by mdk #33462: reversible dict https://bugs.python.org/issue33462 closed by inada.naoki #33578: cjkcodecs missing getstate and setstate implementations https://bugs.python.org/issue33578 closed by inada.naoki #34205: Ansible: _PyImport_LoadDynamicModuleWithSpec() crash on an inv https://bugs.python.org/issue34205 closed by mdk #34547: Wsgiref server does not handle closed connections gracefully https://bugs.python.org/issue34547 closed by chris.jerdonek #34699: allow path-like objects in program arguments in Windows https://bugs.python.org/issue34699 closed by serhiy.storchaka #34726: Add support of checked hash-based pycs in zipimport https://bugs.python.org/issue34726 closed by serhiy.storchaka #34885: asyncio documention has lost its paragraph about cancellation https://bugs.python.org/issue34885 closed by asvetlov #34898: add mtime argument to gzip.compress https://bugs.python.org/issue34898 closed by serhiy.storchaka #34966: Pydoc: better support of method aliases https://bugs.python.org/issue34966 closed by serhiy.storchaka #34969: Add --fast, --best to the gzip CLI https://bugs.python.org/issue34969 closed by mdk #35015: availability directive breaks po files https://bugs.python.org/issue35015 closed by mdk #35032: Remove the videos from faq/Windows https://bugs.python.org/issue35032 closed by matrixise #35065: Reading received data from a closed TCP stream using `StreamRe https://bugs.python.org/issue35065 closed by asvetlov #35099: Improve the IDLE - console differences doc https://bugs.python.org/issue35099 closed by terry.reedy #35109: Doctest in CI uses python binary built from master causing Dep https://bugs.python.org/issue35109 closed by mdk #35118: Add peek() or first() method in queue https://bugs.python.org/issue35118 closed by rhettinger #35123: Add style guide for sentinel usage https://bugs.python.org/issue35123 closed by serhiy.storchaka #35133: Bugs in concatenating string literals on different lines https://bugs.python.org/issue35133 closed by serhiy.storchaka #35147: _Py_NO_RETURN is always empty on GCC https://bugs.python.org/issue35147 closed by vstinner #35148: cannot activate a venv environment on a Swiss German windows https://bugs.python.org/issue35148 closed by vinay.sajip #35150: Misc/README.valgrind out-of-date https://bugs.python.org/issue35150 closed by cheryl.sabella #35152: too small type for struct.pack/unpack in mutliprocessing.Conne https://bugs.python.org/issue35152 closed by serhiy.storchaka #35154: subprocess.list2cmdline() does not allow running some commands https://bugs.python.org/issue35154 closed by Roffild #35159: Add a link to the devguide in the sidebar of the documentation https://bugs.python.org/issue35159 closed by mdk #35160: PyObjects initialized with PyObject_New have uninitialized poi https://bugs.python.org/issue35160 closed by benjamin.peterson #35161: ASAN: stack-use-after-scope in grp.getgr{nam,gid} and pwd.getp https://bugs.python.org/issue35161 closed by serhiy.storchaka #35162: Inconsistent behaviour around __new__ https://bugs.python.org/issue35162 closed by serhiy.storchaka #35167: Specify program for gzip and json.tool command line options https://bugs.python.org/issue35167 closed by serhiy.storchaka #35170: 3.7.1 compile failure on CentOS 6.10; _ctypes did not build https://bugs.python.org/issue35170 closed by lana.deere #35171: test_TimeRE_recreation_timezone failure on systems with non-de https://bugs.python.org/issue35171 closed by benjamin.peterson #35175: Builtin function all() is handling dict() types in a weird way https://bugs.python.org/issue35175 closed by josh.r #35176: for loop range bug https://bugs.python.org/issue35176 closed by steven.daprano #35179: Limit max sendfile chunk to 0x7ffff000 https://bugs.python.org/issue35179 closed by asvetlov #35180: Ctypes segfault or TypeError tested for python2.7 and 3 https://bugs.python.org/issue35180 closed by josh.r #35187: a bug about np.arrange https://bugs.python.org/issue35187 closed by mark.dickinson #35188: something confused about numpy.arange https://bugs.python.org/issue35188 closed by xyl123

1 0

Implementing an awaitable
by Justin Turner Arthur 08 Nov '18

08 Nov '18

I'm trying to figure out if our documentation on the new awaitable concept in Python 3.6+ is correct. It seems to imply that if an object's __await__ method returns an iterator, the object is awaitable. However, just returning an iterator doesn't seem to work with await in a coroutine or with the asyncio selector loop's run_until_complete method. If the awaitable is not a coroutine or future, it looks like we wrap it in a coroutine using sub-generator delegation, and therefore have to have an iterator that fits a very specific shape for the coroutine step process that isn't documented anywhere I could find. Am I missing something? If the definition of an awaitable is more than just an __await__ iterator, we may need to expand the documentation as well as the abstract base class. Here's what I tried in making a synchronous awaitable that resolves to the int 42: class MyAwaitable(Awaitable): def __await__(self): return iter((42,)) # RuntimeError: Task got bad yield: 42 class MyAwaitable(Awaitable): def __await__(self): yield 42 # RuntimeError: Task got bad yield: 42 class MyAwaitable(Awaitable): def __await__(self): return (i for i in (42,)) # RuntimeError: Task got bad yield: 42 class MyAwaitable(Awaitable): def __await__(self): return self def __next__(self): return 42 # RuntimeError: Task got bad yield: 42''' class MyAwaitable(Awaitable): def __await__(self): return iter(asyncio.coroutine(lambda: 42)()) # TypeError: __await__() returned a coroutine class MyAwaitable(Awaitable): def __await__(self): yield from asyncio.coroutine(lambda: 42)() # None class MyAwaitable(Awaitable): def __await__(self): return (yield from asyncio.coroutine(lambda: 42)()) # 42 async def await_things(): print(await MyAwaitable()) asyncio.get_event_loop().run_until_complete(await_things())

2 2

SyntaxError: can't assign to literal while using ""blkid -o export %s | grep 'TYPE' | cut -d"=" -f3" % (fs)" using subprocess module in Python
by srinivasan 07 Nov '18

07 Nov '18

Dear Python Experts Team, As am newbie to python development, I am trying to use the below function to get verify the filesystem type of the SD card parition using bash command in python using subprocess module, I ma seeing the below Error "SyntaxError: can't assign to literal" *CODE:* *====* import helper from os import path import subprocess import os import otg_ni class emmc(object): """ emmc getters and setters info: https://www.kernel.org/doc/Documentation/cpu-freq/user-guide.txt """ def __init__(self): self._helper = helper.helper() self._otg_ni = otg_ni.otg_ni() *def get_fstype_of_mounted_partition(self, fs):* """ Get the filesystem type of the mounted partition. :partition_name : Partition path as string (e.g. /dev/mmcblk0p1) :return: filesystem type as string or None if not found """ * cmd = "blkid -o export %s | grep 'TYPE' | cut -d"=" -f3" % (fs)* *return self._helper.execute_cmd_output_string(cmd)* *def execute_cmd_output_string(self, cmd, enable_shell=False):* """ Execute a command and return its output as a string. :param cmd: abs path of the command with arguments :param enable_shell : force the cmd to be run as shell script :return: a string. """ try: result = subprocess.check_output(split(cmd), stderr=subprocess.STDOUT, shell=enable_shell) except subprocess.CalledProcessError as e: s = """While executing '{}' something went wrong. Return code == '{}' Return output:\n'{}' """.format(cmd, e.returncode, e.output, shell=enable_shell) raise AssertionError(s) return result.strip().decode("utf-8") *if __name__ == "__main__":* m = emmc() * m.get_fstype_of_mounted_partition("/dev/mmcblk0p1")* *Error:* *======* root:~/qa/test_library# python3 sd.py File "sd.py", line 99 * cmd = "blkid -o export %s | grep 'TYPE' | cut -d"=" -f3" % (fs)* * ^* *SyntaxError: can't assign to literal* root:~/qa/test_library# Kindly do the needful as early as possible, as am stuck with this issue from past 2 days no clues yet, please redirect me to the correct forum if this is not the right place for pasting python related queries Many Thanks in advance, Srini

4 3

What is the difference between Py_BUILD_CORE and Py_BUILD_CORE_BUILTIN?
by Victor Stinner 07 Nov '18

07 Nov '18

Hi, I'm trying to cleanup the Python C API, especially strictly separate the public C API, the stable C API (Py_LIMITED_API), and the internal C API (Py_BUILD_CORE). Move internal headers to Include/internal/ : https://bugs.python.org/issue35081 Move !Py_LIMITED_API to Include/pycapi/: https://bugs.python.org/issue35134 I tried to ensure that Py_BUILD_CORE is defined when including pycore_xxx.h headers from Include/internal/, but the compilation of the _json module fails. Modules/_json.c contains: /* Core extension modules are built-in on some platforms (e.g. Windows). */ #ifdef Py_BUILD_CORE #define Py_BUILD_CORE_BUILTIN #undef Py_BUILD_CORE #endif I don't understand the difference between Py_BUILD_CORE and Py_BUILD_CORE_BUILTIN defines. Do we need to have two different defines? Can't we compile _json with Py_BUILD_CORE? _json.c uses pycore_accu.h: /* * A two-level accumulator of unicode objects that avoids both the overhead * of keeping a huge number of small separate objects, and the quadratic * behaviour of using a naive repeated concatenation scheme. */ Is it a problem of the visibility/scope of symbols in the python DLL on Windows? Victor

2 1

Rename Include/internals/ to Include/pycore/
by Victor Stinner 07 Nov '18

07 Nov '18

Hi, Python C API has no strict separation between the 3 levels of API: * core: Py_BUILD_CORE define * stable: Py_LIMITED_API define (it has a value) * regular: no define IMHO the current design of header files is done backward: by default, everything is public. To exclude an API from core or stable, "#ifdef Py_BUILD_CORE" and "#ifndef Py_LIMITED_API" are used. This design caused issues in the past: functions, variables or something else exposed whereas they were supposed to be "private". I propose a practical solution for that: Include/*.h files would only be be public API. The "core" API would live in a new subdirectory: Include/pycore/*.h. Moreover, files of this subdirectory would have the prefix "pycore_". For example, Include/objimpl.h would have a twin: Include/pycore/pycore_objimpl.h which extend the public API with "core" APIs. I also propose to automatically load the twin: Include/objimpl.h would load Include/pycore/pycore_objimpl.h if Py_BUILD_CORE is defined: #ifdef Py_BUILD_CORE # include "pycore/pycore_objimpl.h" #endif Only in some rare cases, you would have to explicitly use: #include "pycore/pycore_pygetopt.h". This header is fully private, there is no public header in Include/pygetopt.h. Or maybe we should modify Include/Python.h to also include "pycore/pycore_pygetopt.h" if Py_BUILD_CORE is defined? Well, that's just a detail. First milestone: * Create Include/pycore/ * Move Py_BUILD_CORE specific code into Include/pycore/pycore_*.h * Automatically include pycore files from Include/*.h files (#ifdef Py_BUILD_CORE) Second milestone: * Find a solution for Py_LIMITED_API :-) Backward compatibility? The overall change is fully backward compatible. The default API doesn't change. C code (using header fles) doesn't have to be changed. Only a specific kinds of applications like debugger may have to be modified if they really have to access the "core" API, the "most private" API. Honestly, today it's unclear to me if this API can technically be used outside CPython. Victor

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