Mailman 3 April 2017 - Python-Dev

Summary of Python tracker Issues
by Python tracker April 14, 2017

April 14, 2017

ACTIVITY SUMMARY (2017-04-07 - 2017-04-14) 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 5889 ( +7) closed 35940 (+49) total 41829 (+56) Open issues with patches: 2410 Issues opened (33) ================== #30018: multiprocessing.Pool garbles call stack for __new__ http://bugs.python.org/issue30018 opened by Charles McEachern #30019: IDLE freezes when opening a file with astral characters http://bugs.python.org/issue30019 opened by David E. Franco G. #30022: Get rid of using EnvironmentError and IOError http://bugs.python.org/issue30022 opened by serhiy.storchaka #30024: Treat `import a.b.c as m` as `m = sys.modules['a.b.c']` http://bugs.python.org/issue30024 opened by Victor.Varvariuc #30028: make test.support.temp_cwd() fork-safe http://bugs.python.org/issue30028 opened by anselm.kruis #30030: Simplify _RandomNameSequence http://bugs.python.org/issue30030 opened by serhiy.storchaka #30031: Improve queens demo (use argparse and singular form) http://bugs.python.org/issue30031 opened by paka #30034: csv reader chokes on bad quoting in large files http://bugs.python.org/issue30034 opened by keef604 #30035: [RFC] PyMemberDef.name should be const char * http://bugs.python.org/issue30035 opened by Sunyeop Lee #30038: Race condition in how trip_signal writes to wakeup fd http://bugs.python.org/issue30038 opened by njs #30039: Resuming a 'yield from' stack is broken if a signal arrives in http://bugs.python.org/issue30039 opened by njs #30040: new empty dict can be more small http://bugs.python.org/issue30040 opened by inada.naoki #30044: shutil.copystat should (allow to) copy ownership, and other at http://bugs.python.org/issue30044 opened by noctiflore #30046: csv: Inconsistency re QUOTE_NONNUMERIC http://bugs.python.org/issue30046 opened by tlotze #30048: If a task is canceled at the right moment, the cancellation is http://bugs.python.org/issue30048 opened by abacabadabacaba #30049: Don't cache tp_iternext http://bugs.python.org/issue30049 opened by serhiy.storchaka #30050: Please provide a way to disable the warning printed if the sig http://bugs.python.org/issue30050 opened by njs #30051: Document that the random module doesn't support fork http://bugs.python.org/issue30051 opened by haypo #30052: URL Quoting page links to function Bytes instead of defintion http://bugs.python.org/issue30052 opened by csabella #30053: Problems building with --enable-profiling on macOS http://bugs.python.org/issue30053 opened by brechtm #30054: Expose tracemalloc C API to track/untrack memory blocks http://bugs.python.org/issue30054 opened by haypo #30057: signal.signal should check tripped signals http://bugs.python.org/issue30057 opened by jdemeyer #30058: Buffer overflow in kqueue.control() http://bugs.python.org/issue30058 opened by serhiy.storchaka #30059: No documentation for C type Py_Ellipsis http://bugs.python.org/issue30059 opened by MSeifert #30060: Crash on Py_Finalize if Py_NoSiteFlag is used http://bugs.python.org/issue30060 opened by steveire #30061: Check if PyObject_Size() raised an error http://bugs.python.org/issue30061 opened by serhiy.storchaka #30062: datetime in Python 3.6+ no longer respects 'TZ' environment va http://bugs.python.org/issue30062 opened by adamwill #30064: BaseSelectorEventLoop.sock_{recv,sendall}() don't remove their http://bugs.python.org/issue30064 opened by abacabadabacaba #30065: Insufficient validation in _posixsubprocess.fork_exec() http://bugs.python.org/issue30065 opened by serhiy.storchaka #30068: missing iter(self) in _io._IOBase.readlines http://bugs.python.org/issue30068 opened by xiang.zhang #30069: External library behave differently when loaded by Python (may http://bugs.python.org/issue30069 opened by sylgar #30070: Fix errors handling in the parser module http://bugs.python.org/issue30070 opened by serhiy.storchaka #30071: Duck-typing inspect.isfunction() http://bugs.python.org/issue30071 opened by jdemeyer Most recent 15 issues with no replies (15) ========================================== #30070: Fix errors handling in the parser module http://bugs.python.org/issue30070 #30069: External library behave differently when loaded by Python (may http://bugs.python.org/issue30069 #30068: missing iter(self) in _io._IOBase.readlines http://bugs.python.org/issue30068 #30064: BaseSelectorEventLoop.sock_{recv,sendall}() don't remove their http://bugs.python.org/issue30064 #30057: signal.signal should check tripped signals http://bugs.python.org/issue30057 #30053: Problems building with --enable-profiling on macOS http://bugs.python.org/issue30053 #30049: Don't cache tp_iternext http://bugs.python.org/issue30049 #30044: shutil.copystat should (allow to) copy ownership, and other at http://bugs.python.org/issue30044 #30039: Resuming a 'yield from' stack is broken if a signal arrives in http://bugs.python.org/issue30039 #30035: [RFC] PyMemberDef.name should be const char * http://bugs.python.org/issue30035 #30022: Get rid of using EnvironmentError and IOError http://bugs.python.org/issue30022 #30016: No sideways scrolling in IDLE http://bugs.python.org/issue30016 #30013: Compiler warning in Modules/posixmodule.c http://bugs.python.org/issue30013 #30011: HTMLParser class is not thread safe http://bugs.python.org/issue30011 #30006: Deadlocks in `concurrent.futures.ProcessPoolExecutor` http://bugs.python.org/issue30006 Most recent 15 issues waiting for review (15) ============================================= #30071: Duck-typing inspect.isfunction() http://bugs.python.org/issue30071 #30070: Fix errors handling in the parser module http://bugs.python.org/issue30070 #30068: missing iter(self) in _io._IOBase.readlines http://bugs.python.org/issue30068 #30065: Insufficient validation in _posixsubprocess.fork_exec() http://bugs.python.org/issue30065 #30061: Check if PyObject_Size() raised an error http://bugs.python.org/issue30061 #30058: Buffer overflow in kqueue.control() http://bugs.python.org/issue30058 #30057: signal.signal should check tripped signals http://bugs.python.org/issue30057 #30049: Don't cache tp_iternext http://bugs.python.org/issue30049 #30040: new empty dict can be more small http://bugs.python.org/issue30040 #30028: make test.support.temp_cwd() fork-safe http://bugs.python.org/issue30028 #30022: Get rid of using EnvironmentError and IOError http://bugs.python.org/issue30022 #30017: zlib.error: Error -2 while flushing: inconsistent stream state http://bugs.python.org/issue30017 #30014: Speedup DefaultSelectors.modify() by 2x http://bugs.python.org/issue30014 #30006: Deadlocks in `concurrent.futures.ProcessPoolExecutor` http://bugs.python.org/issue30006 #29999: repr() of ImportError misses keyword arguments name and path http://bugs.python.org/issue29999 Top 10 most discussed issues (10) ================================= #29870: ssl socket leak http://bugs.python.org/issue29870 18 msgs #29956: math.exp documentation is misleading http://bugs.python.org/issue29956 11 msgs #30040: new empty dict can be more small http://bugs.python.org/issue30040 11 msgs #30024: Treat `import a.b.c as m` as `m = sys.modules['a.b.c']` http://bugs.python.org/issue30024 10 msgs #30028: make test.support.temp_cwd() fork-safe http://bugs.python.org/issue30028 9 msgs #30034: csv reader chokes on bad quoting in large files http://bugs.python.org/issue30034 9 msgs #30038: Race condition in how trip_signal writes to wakeup fd http://bugs.python.org/issue30038 9 msgs #30048: If a task is canceled at the right moment, the cancellation is http://bugs.python.org/issue30048 7 msgs #30018: multiprocessing.Pool garbles call stack for __new__ http://bugs.python.org/issue30018 6 msgs #30030: Simplify _RandomNameSequence http://bugs.python.org/issue30030 6 msgs Issues closed (46) ================== #16572: Bad multi-inheritance support in some libs like threading or m http://bugs.python.org/issue16572 closed by rhettinger #21301: pathlib missing Path.expandvars(env=os.environ) http://bugs.python.org/issue21301 closed by berker.peksag #26187: sqlite3 trace callback prints duplicate line http://bugs.python.org/issue26187 closed by berker.peksag #26860: Make os.walk and os.fwalk yield namedtuple instead of tuple http://bugs.python.org/issue26860 closed by rhettinger #26985: Information about CodeType in inspect documentation is outdate http://bugs.python.org/issue26985 closed by xiang.zhang #29506: Incorrect documentation for the copy module http://bugs.python.org/issue29506 closed by ncoghlan #29642: Why does unittest.TestLoader.discover still rely on existence http://bugs.python.org/issue29642 closed by berker.peksag #29692: contextlib.contextmanager may incorrectly unchain RuntimeError http://bugs.python.org/issue29692 closed by Mariatta #29694: race condition in pathlib mkdir with flags parents=True http://bugs.python.org/issue29694 closed by Mariatta #29791: print documentation: flush is also a keyword argument http://bugs.python.org/issue29791 closed by berker.peksag #29869: Underscores in numeric literals not supported in lib2to3. http://bugs.python.org/issue29869 closed by Mariatta #29914: Incorrect signatures of object.__reduce__() and object.__reduc http://bugs.python.org/issue29914 closed by serhiy.storchaka #29951: PyArg_ParseTupleAndKeywords exception messages containing "fun http://bugs.python.org/issue29951 closed by serhiy.storchaka #29957: unnecessary LBYL for key contained in defaultdict, lib2to3/btm http://bugs.python.org/issue29957 closed by Mariatta #29963: Remove obsolete declaration PyTokenizer_RestoreEncoding in tok http://bugs.python.org/issue29963 closed by Jim Fasarakis-Hilliard #29975: Issue in extending documentation http://bugs.python.org/issue29975 closed by terry.reedy #29987: inspect.isgeneratorfunction not working with partial functions http://bugs.python.org/issue29987 closed by terry.reedy #29989: subprocess.Popen does not handle file-like objects without fil http://bugs.python.org/issue29989 closed by rtpg #29994: site.USER_SITE is None for Windows embeddable Python 3.6 http://bugs.python.org/issue29994 closed by steve.dower #29995: re.escape() escapes too much http://bugs.python.org/issue29995 closed by serhiy.storchaka #29998: Pickling and copying ImportError doesn't preserve name and pat http://bugs.python.org/issue29998 closed by serhiy.storchaka #30012: gzip.open(filename, "rt") fails on Python 2.7.11 on win32, inv http://bugs.python.org/issue30012 closed by martin.panter #30015: Windows also treats full-width spaces as a delimiter when pars http://bugs.python.org/issue30015 closed by LCY #30020: Make attrgetter use namedtuple http://bugs.python.org/issue30020 closed by rhettinger #30021: Add examples for re.escape() http://bugs.python.org/issue30021 closed by serhiy.storchaka #30023: Example code becomes invalid for "Why do lambdas defined in a http://bugs.python.org/issue30023 closed by eric.smith #30025: Spam http://bugs.python.org/issue30025 closed by zach.ware #30026: Hashable doesn't check for __eq__ http://bugs.python.org/issue30026 closed by rhettinger #30027: test_xml_etree and test_xml_etree_c fail due to AssertionError http://bugs.python.org/issue30027 closed by serhiy.storchaka #30029: Compiler "'await' outside function" error message is unreachab http://bugs.python.org/issue30029 closed by anthonypjshaw #30032: email module creates base64 output with incorrect line breaks http://bugs.python.org/issue30032 closed by r.david.murray #30033: email module base64-encodes utf-8 text http://bugs.python.org/issue30033 closed by r.david.murray #30036: The bugs website doesn't use httpS by default http://bugs.python.org/issue30036 closed by Mariatta #30037: inspect documentation on code attributes incomplete http://bugs.python.org/issue30037 closed by martin.panter #30041: subprocess: weird behavior with shell=True and args being a li http://bugs.python.org/issue30041 closed by martin.panter #30042: fcntl module for windows http://bugs.python.org/issue30042 closed by christian.heimes #30043: fcntl module for windows platform http://bugs.python.org/issue30043 closed by haypo #30045: Bad parameter name in re.escape() http://bugs.python.org/issue30045 closed by serhiy.storchaka #30047: Typos in Doc/library/select.rst http://bugs.python.org/issue30047 closed by Mariatta #30055: Missed testcleanup in decimal.rst http://bugs.python.org/issue30055 closed by skrah #30056: RuntimeWarning: invalid value encountered in maximum/minimum http://bugs.python.org/issue30056 closed by r.david.murray #30063: DeprecationWarning in json/encoder.py http://bugs.python.org/issue30063 closed by r.david.murray #30066: anaconda3::traitsu::NotImplementedError http://bugs.python.org/issue30066 closed by berker.peksag #30067: _osx_support.py: misplaced flags in re.sub() http://bugs.python.org/issue30067 closed by serhiy.storchaka #30072: re functions: convert count and flags parameters to keyword-on http://bugs.python.org/issue30072 closed by serhiy.storchaka #30073: binary compressed file reading corrupts newlines (lzma, gzip, http://bugs.python.org/issue30073 closed by jtaylor

1 0

Is there any docstring format used inside CPython core?
by Louie Lu April 13, 2017

April 13, 2017

Hi everyone, Is there any docstring format used inside CPython core? e.g. Doxygen. During the tour to know more about CPython, I found that some part of the internal function didn't comment that intuitive, for example, `tok_get` return value, `tok_decimal_tail` description, ...etc. If there is a exist docstring format or style, I can help to complete it. If not, is there any plan to introduce the docstring format into the core. (or maybe some discuss has there before, I can't found inside the python-dev archive) Thanks, Louie.

3 2

Please use #9999 when writing a new PEP
by Mariatta Wijaya April 12, 2017

April 12, 2017

Hi everyone, >From now on, when proposing a new PEP, please use the number 9999. This allows Travis build to pass, while waiting for a PEP editor to assign you a number. This means, in the header of your draft PEP, instead of ``PEP: XXX``, you should now use ``PEP: 9999``. You should name the file ``pep-9999.rst``, instead of ``pep-xxxx.rst``. Both PEP 1 and PEP 12 have been updated to address this. Thanks :) Mariatta Wijaya

1 0

windows installer and python list mention
by Ethan Furman April 11, 2017

April 11, 2017

Apparently the Windows installer mentions asking for help on Python List. If accessing Python List directly via email it is necessary to subscribe first -- perhaps that could be mentioned? Bonus Python Points for mentioning the other methods that do not require subscribing. :) Rejection text sent to non-subscribers follows: ---- "Hello! I see you want to post a message to the Python List. We would be happy to help, but you must subscribe first: https://mail.python.org/mailman/listinfo/python-list After you have subscribed, please send your message again. Alternatively, this list is mirrored both ways with the comp.lang.python newsgroup (news:comp.lang.python). Some people find it easier to follow this and other lists via gmane (http://news.gmane.org/gmane.comp.python.general), a service which offers a newsgroup interface to many online mailing lists. *NB all posts to the mailing list are publicly archived at:* https://mail.python.org/pipermail/python-list " Any questions or comments should be directed to the list administrator at: python-list-owner(a)python.org --- -- ~Ethan~

7 6

I will be deleting the cpython-mirror repo on April 10
by Brett Cannon April 10, 2017

April 10, 2017

On the two-month anniversary of the GitHub migration I'm going to delete the old git mirror: https://github.com/python/cpython-mirror. If you have a old PR that got closed with comments or something, now is the time to get those comments off.

2 2

CPython benchmark status, April 2017
by Victor Stinner April 7, 2017

April 7, 2017

Hi, I'm still working on analyzing past optimizations to guide future optimizations. I succeeded to identify multiple significant optimizations over the last 3 years. At least for me, some were unexpected like "Use the test suite for profile data" which made pickle 1.28x faster and pidigts 1.16x faster. Here is a report of my benchmark work of last weeks. I succeeded to compute benchmarks on CPython master on the period April, 2014-April,2017: we now have have a timeline over 3 years of CPython performance! https://speed.python.org/timeline/ I started to take notes on significant performance changes (speedup and slowdown) of this timeline: http://pyperformance.readthedocs.io/cpython_results_2017.html To identify the change which introduced a significant performance change, I wrote a Python script running a Git bisection: compile CPython, run benchmark, repeat. https://github.com/haypo/misc/blob/master/misc/bisect_cpython_perf.py It uses a configuration file which looks like: --- [config] work_dir = ~/prog/bench_python/bisect-pickle src_dir = ~/prog/bench_python/master old_commit = 133138a284be1985ebd9ec9014f1306b9a42 new_commit = 10427f44852b6e872034061421a8890902b8f benchmark = ~/prog/bench_python/performance/performance/benchmarks/bm_pickle.py pickle benchmark_opts = --inherit-environ=PYTHONPATH -p5 -v configure_args = --- I succeeded to identify many significant optimizations, examples: * PyMem_Malloc() now uses the fast pymalloc allocator * Add a C implementation of collections.OrderedDict * Use the test suite for profile data * Speedup method calls 1.2x * Added C implementation of functools.lru_cache() * Optimized ElementTree.iterparse(); it is now 2x faster perf, performance, server configuration, etc. evolve quicker than expected, so I created a Git project to keep a copy of JSON files: https://github.com/haypo/performance_results I lost data of my first milestone (november-december 2016), but you have data from the second (december 2016-february 2017) and third (march 2016-today) milestones. Victor

2 2

Summary of Python tracker Issues
by Python tracker April 7, 2017

April 7, 2017

ACTIVITY SUMMARY (2017-03-31 - 2017-04-07) 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 5882 (+27) closed 35891 (+37) total 41773 (+64) Open issues with patches: 2413 Issues opened (48) ================== #29939: Compiler warning in _ctypes_test.c http://bugs.python.org/issue29939 reopened by vinay.sajip #29956: math.exp documentation is misleading http://bugs.python.org/issue29956 opened by belopolsky #29957: unnecessary LBYL for key contained in defaultdict, lib2to3/btm http://bugs.python.org/issue29957 opened by selik #29960: _random.Random state corrupted on exception http://bugs.python.org/issue29960 opened by bryangeneolson #29963: Remove obsolete declaration PyTokenizer_RestoreEncoding in tok http://bugs.python.org/issue29963 opened by Jim Fasarakis-Hilliard #29964: %z directive has no effect on the output of time.strptime http://bugs.python.org/issue29964 opened by Paul Pinterits #29966: typing.get_type_hints doesn't really work for classes with For http://bugs.python.org/issue29966 opened by simon.percivall #29967: "AMD64 FreeBSD 9.x 3.x" tries to rebuild Include/opcode.h, tim http://bugs.python.org/issue29967 opened by haypo #29970: Severe open file leakage running asyncio SSL server http://bugs.python.org/issue29970 opened by kyuupichan #29971: Lock.acquire() not interruptible on Windows http://bugs.python.org/issue29971 opened by pitrou #29972: Skip tests known to fail on AIX http://bugs.python.org/issue29972 opened by haypo #29974: Change typing.TYPE_CHECKING doc example http://bugs.python.org/issue29974 opened by rav #29975: Issue in extending documentation http://bugs.python.org/issue29975 opened by Namjun Kim #29976: urllib.parse clarify what ' ' in schemes mean http://bugs.python.org/issue29976 opened by orsenthil #29979: cgi.parse_multipart is not consistent with FieldStorage http://bugs.python.org/issue29979 opened by quentel #29980: OSError: multiple exceptions should preserve the exception typ http://bugs.python.org/issue29980 opened by r.david.murray #29981: Update Index for set, dict, and generator 'comprehensions' http://bugs.python.org/issue29981 opened by terry.reedy #29982: tempfile.TemporaryDirectory fails to delete itself http://bugs.python.org/issue29982 opened by max #29983: Reference TOC: expand 'Atoms' and 'Primaries' http://bugs.python.org/issue29983 opened by terry.reedy #29984: Improve test coverage for 'heapq' module http://bugs.python.org/issue29984 opened by Robert Day #29985: make install doesn't seem to support --quiet http://bugs.python.org/issue29985 opened by chris.jerdonek #29986: Documentation recommends raising TypeError from tp_richcompare http://bugs.python.org/issue29986 opened by Devin Jeanpierre #29987: inspect.isgeneratorfunction not working with partial functions http://bugs.python.org/issue29987 opened by Thomas Antony #29988: (async) with blocks and try/finally are not as KeyboardInterru http://bugs.python.org/issue29988 opened by njs #29989: subprocess.Popen does not handle file-like objects without fil http://bugs.python.org/issue29989 opened by rtpg #29990: Range checking in GB18030 decoder http://bugs.python.org/issue29990 opened by Ma Lin #29991: http client marks valid multipart headers with defects. http://bugs.python.org/issue29991 opened by pareshverma91 #29992: Expose parse_string in JSONDecoder http://bugs.python.org/issue29992 opened by oberstet #29994: site.USER_SITE is None for Windows embeddable Python 3.6 http://bugs.python.org/issue29994 opened by brechtm #29995: re.escape() escapes too much http://bugs.python.org/issue29995 opened by serhiy.storchaka #29996: Use terminal width by default in pprint http://bugs.python.org/issue29996 opened by serhiy.storchaka #29997: Suggested changes for https://docs.python.org/3.6/extending/ex http://bugs.python.org/issue29997 opened by ArthurGoldberg #29998: Pickling and copying ImportError doesn't preserve name and pat http://bugs.python.org/issue29998 opened by serhiy.storchaka #29999: repr() of ImportError misses keyword arguments name and path http://bugs.python.org/issue29999 opened by serhiy.storchaka #30000: Inconsistency in the zlib module http://bugs.python.org/issue30000 opened by Ellison Marks #30002: Minor change to https://docs.python.org/3.6/extending/building http://bugs.python.org/issue30002 opened by ArthurGoldberg #30003: Remove hz codec http://bugs.python.org/issue30003 opened by Ma Lin #30004: in regex-howto, improve example on grouping http://bugs.python.org/issue30004 opened by Cristian Barbarosie #30005: Pickling and copying exceptions doesn't preserve non-__dict__ http://bugs.python.org/issue30005 opened by serhiy.storchaka #30006: Deadlocks in `concurrent.futures.ProcessPoolExecutor` http://bugs.python.org/issue30006 opened by tomMoral #30008: OpenSSL 1.1.0 deprecated functions http://bugs.python.org/issue30008 opened by floppymaster #30011: HTMLParser class is not thread safe http://bugs.python.org/issue30011 opened by ale2017 #30012: gzip.open(filename, "rt") fails on Python 2.7.11 on win32, inv http://bugs.python.org/issue30012 opened by maubp #30013: Compiler warning in Modules/posixmodule.c http://bugs.python.org/issue30013 opened by louielu #30014: Speedup DefaultSelectors.modify() by 1.5x http://bugs.python.org/issue30014 opened by giampaolo.rodola #30015: Windows also treats full-width spaces as a delimiter when pars http://bugs.python.org/issue30015 opened by LCY #30016: No sideways scrolling in IDLE http://bugs.python.org/issue30016 opened by Jensen Taylor #30017: zlib.error: Error -2 while flushing: inconsistent stream state http://bugs.python.org/issue30017 opened by Jeremy Heiner Most recent 15 issues with no replies (15) ========================================== #30017: zlib.error: Error -2 while flushing: inconsistent stream state http://bugs.python.org/issue30017 #30016: No sideways scrolling in IDLE http://bugs.python.org/issue30016 #30015: Windows also treats full-width spaces as a delimiter when pars http://bugs.python.org/issue30015 #30013: Compiler warning in Modules/posixmodule.c http://bugs.python.org/issue30013 #30012: gzip.open(filename, "rt") fails on Python 2.7.11 on win32, inv http://bugs.python.org/issue30012 #30011: HTMLParser class is not thread safe http://bugs.python.org/issue30011 #30008: OpenSSL 1.1.0 deprecated functions http://bugs.python.org/issue30008 #30006: Deadlocks in `concurrent.futures.ProcessPoolExecutor` http://bugs.python.org/issue30006 #30005: Pickling and copying exceptions doesn't preserve non-__dict__ http://bugs.python.org/issue30005 #29998: Pickling and copying ImportError doesn't preserve name and pat http://bugs.python.org/issue29998 #29995: re.escape() escapes too much http://bugs.python.org/issue29995 #29994: site.USER_SITE is None for Windows embeddable Python 3.6 http://bugs.python.org/issue29994 #29985: make install doesn't seem to support --quiet http://bugs.python.org/issue29985 #29984: Improve test coverage for 'heapq' module http://bugs.python.org/issue29984 #29982: tempfile.TemporaryDirectory fails to delete itself http://bugs.python.org/issue29982 Most recent 15 issues waiting for review (15) ============================================= #30014: Speedup DefaultSelectors.modify() by 1.5x http://bugs.python.org/issue30014 #29999: repr() of ImportError misses keyword arguments name and path http://bugs.python.org/issue29999 #29998: Pickling and copying ImportError doesn't preserve name and pat http://bugs.python.org/issue29998 #29996: Use terminal width by default in pprint http://bugs.python.org/issue29996 #29995: re.escape() escapes too much http://bugs.python.org/issue29995 #29990: Range checking in GB18030 decoder http://bugs.python.org/issue29990 #29974: Change typing.TYPE_CHECKING doc example http://bugs.python.org/issue29974 #29963: Remove obsolete declaration PyTokenizer_RestoreEncoding in tok http://bugs.python.org/issue29963 #29957: unnecessary LBYL for key contained in defaultdict, lib2to3/btm http://bugs.python.org/issue29957 #29951: PyArg_ParseTupleAndKeywords exception messages containing "fun http://bugs.python.org/issue29951 #29947: In SocketServer, why not passing a factory instance for the Re http://bugs.python.org/issue29947 #29930: Waiting for asyncio.StreamWriter.drain() twice in parallel rai http://bugs.python.org/issue29930 #29926: time.sleep ignores _thread.interrupt_main() http://bugs.python.org/issue29926 #29914: Incorrect signatures of object.__reduce__() and object.__reduc http://bugs.python.org/issue29914 #29897: itertools.chain behaves strangly when copied with copy.copy http://bugs.python.org/issue29897 Top 10 most discussed issues (10) ================================= #29947: In SocketServer, why not passing a factory instance for the Re http://bugs.python.org/issue29947 15 msgs #30014: Speedup DefaultSelectors.modify() by 1.5x http://bugs.python.org/issue30014 11 msgs #29996: Use terminal width by default in pprint http://bugs.python.org/issue29996 10 msgs #28157: Document time module constants (timezone, tzname, etc.) as dep http://bugs.python.org/issue28157 9 msgs #29941: Confusion between asserts and Py_DEBUG http://bugs.python.org/issue29941 8 msgs #29957: unnecessary LBYL for key contained in defaultdict, lib2to3/btm http://bugs.python.org/issue29957 7 msgs #29964: %z directive has no effect on the output of time.strptime http://bugs.python.org/issue29964 7 msgs #29956: math.exp documentation is misleading http://bugs.python.org/issue29956 6 msgs #5906: Risk of confusion in multiprocessing module - daemonic process http://bugs.python.org/issue5906 5 msgs #19225: lack of PyExc_BufferError doc http://bugs.python.org/issue19225 5 msgs Issues closed (35) ================== #11066: cgi.py proposals : sys.stdout encoding + rewriting of parsing http://bugs.python.org/issue11066 closed by quentel #13290: get vars for object with __slots__ http://bugs.python.org/issue13290 closed by rhettinger #15083: Rewrite ElementTree tests in a cleaner and safer way http://bugs.python.org/issue15083 closed by serhiy.storchaka #16510: Using appropriate checks in tests http://bugs.python.org/issue16510 closed by serhiy.storchaka #20545: Use specific asserts in unicode tests http://bugs.python.org/issue20545 closed by serhiy.storchaka #20547: Use specific asserts in bigmem tests http://bugs.python.org/issue20547 closed by serhiy.storchaka #24117: Wrong range checking in GB18030 decoder. http://bugs.python.org/issue24117 closed by Ma Lin #26947: Hashable documentation improvement needed http://bugs.python.org/issue26947 closed by orsenthil #28115: Use argparse for the zipfile module http://bugs.python.org/issue28115 closed by serhiy.storchaka #29339: Interactive: Move to same indentation level as previousline http://bugs.python.org/issue29339 closed by terry.reedy #29549: Improve docstring for str.index http://bugs.python.org/issue29549 closed by rhettinger #29569: threading.Timer class: Continue periodical execution till acti http://bugs.python.org/issue29569 closed by rhettinger #29649: struct.pack_into check boundary error message ignores offset http://bugs.python.org/issue29649 closed by serhiy.storchaka #29654: SimpleHTTPRequestHandler should support browser cache http://bugs.python.org/issue29654 closed by serhiy.storchaka #29725: sqlite3.Cursor doesn't properly document "arraysize" http://bugs.python.org/issue29725 closed by orsenthil #29762: Use "raise from None" http://bugs.python.org/issue29762 closed by serhiy.storchaka #29949: sizeof set after set_merge() is doubled from 3.5 http://bugs.python.org/issue29949 closed by inada.naoki #29953: Memory leak in the replace() method of datetime and time objec http://bugs.python.org/issue29953 closed by serhiy.storchaka #29954: multiprocessing.Pool.__exit__() calls terminate() instead of c http://bugs.python.org/issue29954 closed by pitrou #29955: logging decimal point should come from locale http://bugs.python.org/issue29955 closed by vinay.sajip #29958: Use add_mutually_exclusive_group(required=True) in zipfile and http://bugs.python.org/issue29958 closed by serhiy.storchaka #29959: re.match failed to match left square brackets as the first cha http://bugs.python.org/issue29959 closed by serhiy.storchaka #29961: More compact sets and frozensets created from sets http://bugs.python.org/issue29961 closed by rhettinger #29962: Add math.remainder operation http://bugs.python.org/issue29962 closed by mark.dickinson #29965: MatchObject __getitem__() should support slicing and len http://bugs.python.org/issue29965 closed by serhiy.storchaka #29968: Document that no characters are allowed to proceed \ in explic http://bugs.python.org/issue29968 closed by Jim Fasarakis-Hilliard #29969: Typo in decimal error message http://bugs.python.org/issue29969 closed by skrah #29973: Travis CI docs broken: UnboundLocalError: local variable 'pref http://bugs.python.org/issue29973 closed by haypo #29977: re.sub stalls forever on an unmatched non-greedy case http://bugs.python.org/issue29977 closed by serhiy.storchaka #29978: Remove remove merge=union attribute for Misc/NEWS in 3.6 and 2 http://bugs.python.org/issue29978 closed by Mariatta #29993: error of parsing encoded words in email of standard library http://bugs.python.org/issue29993 closed by r.david.murray #30001: CPython contribution docs reference missing /issuetracker page http://bugs.python.org/issue30001 closed by Mariatta #30007: report bug http://bugs.python.org/issue30007 closed by xiang.zhang #30009: Integer conversion failure http://bugs.python.org/issue30009 closed by eryksun #30010: Initial bytes to BytesIO cannot be seeked to http://bugs.python.org/issue30010 closed by serhiy.storchaka

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Wider Call For Participation for the 2017 Python Language Summit
by Larry Hastings April 7, 2017

April 7, 2017

The 2017 Python Language Summit is coming! The Python Language Summit is an annual day-long meeting of CPython core developers. It’s a highly technical meeting, designed to explore and resolve existing discussions regarding the Python programming language, the development of its reference implementation CPython, and the impact of the language’s evolution on the existing alternative implementations. It’s a once-a-year opportunity for Python’s core development team to get together in a room and work things out. The meeting is kept small on purpose, as we think that maximizes its productivity and effectiveness. Nearly all attendees are CPython core developers, but we do accept presentations from anyone in the greater Python community who has something interesting to say to the core developers. And that could be you! In order to be eligible, you must be able to attend the Summit in person. The Summit will be held May 17 2017, all day, in the same convention center where PyCon itself is held. You have to get there yourself; we literally have no discretionary budget to help people attend the Summit. However, you don’t have to buy a ticket to PyCon in order to attend the summit--it’s a completely separate event, and it’s free! But mere eligibility is not enough. The presentations are carefully hand-picked by the Language Summit organizers, and must be exceedingly relevant and of high quality in order to be considered. The Summit only comes once a year, and we the organizers want to keep it interesting and maximally productive for the developers who are kind enough to attend. To be brutally honest, we expect most proposals from non-core-developers will be turned down--again, sorry. PyCon is large, diverse, welcoming, and vibrant, and there are lots of great avenues (e.g. lightning talks, BoFs, open spaces, etc.) for discussing Python-related topics. If your proposed talk isn't accepted for the Language Summit, we highly encourage you to explore these other options. Here are the criteria you should keep in mind if you submit a presentation: * Is this a question about the *design* of Python? Or, to a lesser extent, the implementation of CPython or one of the alternative implementations? The Summit is about Python itself--we don’t discuss other projects. * Is this a *technical* debate? The Python universe is large and diverse, but the Summit is explicitly a highly technical meeting, and a deeper technical context on the part of participants is essential. * Is this topic going to spark conversation? A good rule of thumb: your presentation should raise questions, not provide answers. If your topic could be adequately covered in a blog post, it’s probably not interactive enough. * Is this already an ongoing discussion in the Python development community? As a rule the Language Summit is not a venue for new business--it’s for working through existing technical debates. * Is this topic going to be interesting to a lot of people? While it doesn’t have to be universally interesting, it can’t be too narrow either. As a rule, most people in the room should be interested. * Is this a topic that’s still considered "open" by the core developers? There’s no point in proposing a talk saying "you should abandon Python 3 and go back to 2", or even "you should make a Python 2.8". From the perspective of the core developers, these are resolved, closed issues. Examples of interesting topics: * Python’s new async syntax is flawed, here’s why * The design of CPython’s extension API makes it difficult to do what we want it to do * My patch for CPython makes it ten times faster for common workloads * I’m engaged in a lively and long-lived discussion on python-dev and I want to bring it up with the core devs in person, so that a resolution can be found Examples of irrelevant / uninteresting / ineligible topics: * A useful Python library you want people to know about * A new language feature you want to propose * There’s a bug in CPython you want to raise awareness about * The Python community needs to... The process for submitting a talk proposal is exactly the same as for core developers: fill out the Google form with your contact information, your affiliation, and a summary of your proposal. The form is reachable via the Language Summit page under the PyCon events menu: https://us.pycon.org/2017/events/language-summit/ Since this wider call for proposals comes so late in the process, we’re extending the deadline for submissions. The deadline is now Thursday, April 20th, 2017, two weeks from today. If your submission is accepted, we will notify you by May 1st. Finally, even if you don’t get to attend, stay tuned to Linux Weekly News (LWN) in the days and weeks following the Language Summit. Jake Edge from LWN has done a fantastic job of reporting on the Language Summit the previous two years, and is planning on attending and reporting on it again this year. We all look forward to his thorough reporting of the event! [BL]arry (Barry Warsaw and Larry Hastings)

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Sorting
by Ethan Furman April 6, 2017

April 6, 2017

Just want to drop a note and say THANK YOU to everyone for the work in improving Python to the 3 branch. And if you're curious as to why: I just spent three hours trying to figure out why my comparisons were succeeding when they should be raising exceptions -- and then remembered that in 2.x there's a fallback to comparing type names. Grrrr. :/ So, THANK YOU!! -- ~Ethan~

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why _PyGen_Finalize(gen) propagates close() to _PyGen_yf() ?
by Oleg Nesterov April 3, 2017

April 3, 2017

Hello, Let me first clarify, I do not claim this is a bug, I am trying to learn python and now I trying to understand yield-from. This simple test-case g = (x for x in range(10)) def fg(): for x in g: yield x print(next(fg())) print(next(g)) works as expected and prints: 0 1 However, if I change fg() to use yield-from g = (x for x in range(10)) def fg(): yield from g print(next(fg())) print(next(g)) then next(g) raises StopIteration: 0 Traceback (most recent call last): File "/tmp/T.py", line 10, in <module> print(next(g)) StopIteration because g.close() is called by destructor of the object returned by fg(). To me this looks strange and confusing. I tried to google, and found https://docs.python.org/3/whatsnew/3.3.html#pep-380 but it doesn't document this behaviour. I understand that yield-from should propagate .close(), but why _PyGen_Finalize() should send close() to the gi_yieldfrom object? I applied the patch below just to verify that I actually understand what's going on, and with this patch the 2nd test-case works as I'd expect. But since I am very new to python I'd suspect that the code is fine and I simply do not understand why it works this way. So. could someone please explain the rationale behind this behaviour? And probably update the docs should be updated? Thanks in advance. Oleg. --- diff --git a/Objects/genobject.c b/Objects/genobject.c index 24a1da6..d5152eb 100644 --- a/Objects/genobject.c +++ b/Objects/genobject.c @@ -6,6 +6,7 @@ #include "opcode.h" static PyObject *gen_close(PyGenObject *, PyObject *); +static PyObject *do_gen_close(PyGenObject *, PyObject *); static PyObject *async_gen_asend_new(PyAsyncGenObject *, PyObject *); static PyObject *async_gen_athrow_new(PyAsyncGenObject *, PyObject *); @@ -71,7 +72,7 @@ _PyGen_Finalize(PyObject *self) } } else { - res = gen_close(gen, NULL); + res = do_gen_close(gen, NULL); } if (res == NULL) { @@ -373,10 +374,9 @@ _PyGen_yf(PyGenObject *gen) } static PyObject * -gen_close(PyGenObject *gen, PyObject *args) +do_gen_close(PyGenObject *gen, PyObject *yf) { PyObject *retval; - PyObject *yf = _PyGen_yf(gen); int err = 0; if (yf) { @@ -407,6 +407,11 @@ gen_close(PyGenObject *gen, PyObject *args) return NULL; } +static PyObject * +gen_close(PyGenObject *gen, PyObject *args) +{ + return do_gen_close(gen, _PyGen_yf(gen)); +} PyDoc_STRVAR(throw_doc, "throw(typ[,val[,tb]]) -> raise exception in generator,\n\

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