Mailman 3 October 2015 - Python-Dev

type(obj) vs. obj.__class__
by Eric Snow 20 Oct '15

20 Oct '15

In a recent tracker issue about OrderedDict [1] we've had some discussion about the use of type(od) as a replacement for od.__class__. It came up because the pure Python implementation of OrderedDict uses self.__class__ in 3 different methods (__repr__, __reduce__, and copy). The patch in that issue changes the C implementation to use Py_TYPE(). [2] So I wanted to get some feedback on the practical implications of such a change and if we need to clarify the difference more formally. In this specific case [3] there are 3 questions: * Should __repr__() for a stdlib class use type(self).__name__ or self.__class__.__name__? * Should __reduce__() return type(self) or self.__class__? * Should copy() use type(self) or self.__class__? The more general question of when we use type(obj) vs. obj.__class__ applies to both the language and to all the stdlib as I expect consistency there would result in fewer surprises. I realize that there are some places where using obj.__class__ makes more sense (e.g. for some proxy support). There are other places where using type(obj) is the way to go (e.g. special method lookup). However, the difference is muddled enough that usage is inconsistent in the stdlib. For example, C-implemented types use Py_TYPE() almost exclusively. So, would it make sense to establish some concrete guidelines about when to use type(obj) vs. obj.__class__? If so, what would those be? It may also be helpful to enumerate use cases for "type(obj) is not obj.__class__". -eric [1] http://bugs.python.org/issue25410 [2] I'm going to open a separate thread about the issue of compatibility and C accelerated types. [3] https://hg.python.org/cpython/file/default/Lib/collections/__init__.py#l238

9 15

PEP 506 secrets module
by Brian Gladman 17 Oct '15

17 Oct '15

> Guido van Rossum wrote: > I'm fine with dropping the 3rd arg. But I find the argument to > introduce a new spelling for 1-arg randrange() weak. I should stress that my preference for randbelow over randrange was based purely on their proposed functionality and not on their names. I do however have a preference for a function of minimum required functionality, i.e. one that allows only a single parameter (N) to set the range 0 .. N-1.

2 1

Conversion of a standard unicode string to a bit string in Python
by Nemo Nautilius 17 Oct '15

17 Oct '15

Hi All, I'm currently programming a set of crypto challenges in order to get a deeper understanding of python and crypto. The problem is to break a repeating key xor data (in a file). In order to do that I need a function to calculate the hamming distance between two strings. To find that one needs to find the differing number of *bits* in a string. Any ideas on how to manipulate the string at bit level? This is my first time in writing a question to the mailing list so please let me know anything that I need to keep in mind while asking questions. Thanks in advance. Gracias Nemo

2 1

Summary of Python tracker Issues
by Python tracker 16 Oct '15

16 Oct '15

ACTIVITY SUMMARY (2015-10-09 - 2015-10-16) 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 5152 ( +8) closed 32026 (+55) total 37178 (+63) Open issues with patches: 2272 Issues opened (37) ================== #24931: _asdict breaks when inheriting from a namedtuple http://bugs.python.org/issue24931 reopened by doko #25188: regrtest.py improvement for Profile Guided Optimization builds http://bugs.python.org/issue25188 reopened by Arfrever #25359: io.open() fails to open ascii file if LANG env not set http://bugs.python.org/issue25359 opened by sentinel #25360: pyw should search for pythonw to implement #!/usr/bin/env pyt http://bugs.python.org/issue25360 opened by eryksun #25366: test_venv fails with --without-threads http://bugs.python.org/issue25366 opened by Arfrever #25370: Add support of pickling very large bytes and str objects with http://bugs.python.org/issue25370 opened by serhiy.storchaka #25376: KeyboardInterrupt handling and traceback broken on Windows 10 http://bugs.python.org/issue25376 opened by mdf #25377: Mention octal format of mode argument of os.chmod http://bugs.python.org/issue25377 opened by krichter #25381: Doc: Use of old description of raise in Python3 http://bugs.python.org/issue25381 opened by xiang.zhang #25385: Spurious warning when compiling extension module http://bugs.python.org/issue25385 opened by pitrou #25386: msvcrt_putch/msvcrt_putwch don't check the return value of _pu http://bugs.python.org/issue25386 opened by Alexander Riccio #25387: sound_msgbeep doesn't check the return value of MessageBeep http://bugs.python.org/issue25387 opened by Alexander Riccio #25388: tokenizer crash/misbehavior -- heap use-after-free http://bugs.python.org/issue25388 opened by Brian.Cain #25390: Can't define a typing.Union containing a typing.re.Pattern http://bugs.python.org/issue25390 opened by Martí Congost Tapias #25392: setup.py --quiet doesn't silence "no previously-included direc http://bugs.python.org/issue25392 opened by nedbat #25393: 'resource' module documentation error http://bugs.python.org/issue25393 opened by tzot #25394: CoroWrapper breaks gen.throw http://bugs.python.org/issue25394 opened by Chris Seto #25395: SIGSEGV using json.tool http://bugs.python.org/issue25395 opened by nagisa #25397: improve ac_cv_have_long_long_format GCC fallback http://bugs.python.org/issue25397 opened by vapier #25400: robotparser doesn't return crawl delay for default entry http://bugs.python.org/issue25400 opened by pwirtz #25402: More accurate estimation of the number of digits in int to dec http://bugs.python.org/issue25402 opened by serhiy.storchaka #25403: urllib.parse.urljoin is broken in python 3.5 http://bugs.python.org/issue25403 opened by Pavel Ivanov #25404: ssl.SSLcontext.load_dh_params() does not handle unicode filena http://bugs.python.org/issue25404 opened by schlenk #25405: User install of 3.5 removes py.exe from C:\Windows http://bugs.python.org/issue25405 opened by paul.moore #25407: Update PEP 4 to keep modules in Python 3 http://bugs.python.org/issue25407 opened by brett.cannon #25408: Consider dropping html5lib and spambayes from the default benc http://bugs.python.org/issue25408 opened by brett.cannon #25409: fnmatch.fnmatch normalizes slashes/backslashes on Windows http://bugs.python.org/issue25409 opened by The Compiler #25410: Clean up and fix OrderedDict http://bugs.python.org/issue25410 opened by serhiy.storchaka #25411: SMTPHandler in the logging module fails with unicode strings http://bugs.python.org/issue25411 opened by simon04 #25412: __floordiv__ in module fraction fails with TypeError instead o http://bugs.python.org/issue25412 opened by ShashkovS #25413: ctypes (libffi) fails to compile on Solaris X86 http://bugs.python.org/issue25413 opened by CristiFati #25414: Bypass unnecessary size limit test from deques on builds with http://bugs.python.org/issue25414 opened by rhettinger #25415: I can create instances of io.IOBase http://bugs.python.org/issue25415 opened by Gerrit.Holl #25416: Add encoding aliases from the (HTML5) Encoding Standard http://bugs.python.org/issue25416 opened by zwol #25417: Minor typo in Path.samefile docstring http://bugs.python.org/issue25417 opened by Antony.Lee #25419: Readline completion of module names in import statements http://bugs.python.org/issue25419 opened by martin.panter #25420: "import random" blocks on entropy collection http://bugs.python.org/issue25420 opened by matejcik Most recent 15 issues with no replies (15) ========================================== #25420: "import random" blocks on entropy collection http://bugs.python.org/issue25420 #25419: Readline completion of module names in import statements http://bugs.python.org/issue25419 #25417: Minor typo in Path.samefile docstring http://bugs.python.org/issue25417 #25416: Add encoding aliases from the (HTML5) Encoding Standard http://bugs.python.org/issue25416 #25413: ctypes (libffi) fails to compile on Solaris X86 http://bugs.python.org/issue25413 #25407: Update PEP 4 to keep modules in Python 3 http://bugs.python.org/issue25407 #25397: improve ac_cv_have_long_long_format GCC fallback http://bugs.python.org/issue25397 #25394: CoroWrapper breaks gen.throw http://bugs.python.org/issue25394 #25393: 'resource' module documentation error http://bugs.python.org/issue25393 #25387: sound_msgbeep doesn't check the return value of MessageBeep http://bugs.python.org/issue25387 #25366: test_venv fails with --without-threads http://bugs.python.org/issue25366 #25360: pyw should search for pythonw to implement #!/usr/bin/env pyt http://bugs.python.org/issue25360 #25355: Windows 3.5 installer does not add python to "App Paths" key http://bugs.python.org/issue25355 #25351: pyvenv activate script failure with specific bash option http://bugs.python.org/issue25351 #25348: Update pgo_build.bat to use --pgo flag for regrtest http://bugs.python.org/issue25348 Most recent 15 issues waiting for review (15) ============================================= #25419: Readline completion of module names in import statements http://bugs.python.org/issue25419 #25414: Bypass unnecessary size limit test from deques on builds with http://bugs.python.org/issue25414 #25413: ctypes (libffi) fails to compile on Solaris X86 http://bugs.python.org/issue25413 #25411: SMTPHandler in the logging module fails with unicode strings http://bugs.python.org/issue25411 #25410: Clean up and fix OrderedDict http://bugs.python.org/issue25410 #25402: More accurate estimation of the number of digits in int to dec http://bugs.python.org/issue25402 #25400: robotparser doesn't return crawl delay for default entry http://bugs.python.org/issue25400 #25394: CoroWrapper breaks gen.throw http://bugs.python.org/issue25394 #25388: tokenizer crash/misbehavior -- heap use-after-free http://bugs.python.org/issue25388 #25381: Doc: Use of old description of raise in Python3 http://bugs.python.org/issue25381 #25370: Add support of pickling very large bytes and str objects with http://bugs.python.org/issue25370 #25347: assert_has_calls output is formatted inconsistently http://bugs.python.org/issue25347 #25341: File mode wb+ appears as rb+ http://bugs.python.org/issue25341 #25338: urllib bypasses all hosts if proxyoverride includes an empty e http://bugs.python.org/issue25338 #25334: telnetlib: process_rawq() and binary data http://bugs.python.org/issue25334 Top 10 most discussed issues (10) ================================= #22005: datetime.__setstate__ fails decoding python2 pickle http://bugs.python.org/issue22005 11 msgs #25356: Idle (Python 3.4 on Ubuntu) does not allow typing accents http://bugs.python.org/issue25356 11 msgs #25194: Opt-in motivations & affiliations page for core contributors http://bugs.python.org/issue25194 10 msgs #25381: Doc: Use of old description of raise in Python3 http://bugs.python.org/issue25381 10 msgs #25359: io.open() fails to open ascii file if LANG env not set http://bugs.python.org/issue25359 9 msgs #25303: Add option to py_compile to compile for syntax checking withou http://bugs.python.org/issue25303 8 msgs #21159: configparser.InterpolationMissingOptionError is not very intui http://bugs.python.org/issue21159 6 msgs #25343: Document atomic operations on builtin types http://bugs.python.org/issue25343 6 msgs #25006: List pybind11 binding generator http://bugs.python.org/issue25006 5 msgs #25352: Add 'make this my default python' to windows installs for Pyth http://bugs.python.org/issue25352 5 msgs Issues closed (57) ================== #5380: pty.read raises IOError when slave pty device is closed http://bugs.python.org/issue5380 closed by gvanrossum #21165: Optimize str.translate() for replacement with substrings and n http://bugs.python.org/issue21165 closed by haypo #21264: test_compileall fails to build in the installed location http://bugs.python.org/issue21264 closed by brett.cannon #22179: Idle. Search dialog found text not highlited on Windows http://bugs.python.org/issue22179 closed by terry.reedy #22726: Idle: add help to config dialogs http://bugs.python.org/issue22726 closed by terry.reedy #24164: Support pickling objects with __new__ with keyword arguments w http://bugs.python.org/issue24164 closed by serhiy.storchaka #24402: input() uses sys.__stdout__ instead of sys.stdout for prompt http://bugs.python.org/issue24402 closed by martin.panter #24782: Merge 'configure extensions' into main IDLE config dialog http://bugs.python.org/issue24782 closed by terry.reedy #24784: Build fails with --with-pydebug and --without-threads http://bugs.python.org/issue24784 closed by python-dev #25001: Make --nowindows argument to regrtest propagate when running w http://bugs.python.org/issue25001 closed by haypo #25023: time.strftime('%a'), ValueError: embedded null byte, in ko loc http://bugs.python.org/issue25023 closed by steve.dower #25093: New 3.5.0 failure in test_tcl on win7 http://bugs.python.org/issue25093 closed by python-dev #25099: test_compileall fails when run by unprivileged user on install http://bugs.python.org/issue25099 closed by brett.cannon #25143: 3.5 install fails poorly on Windows XP http://bugs.python.org/issue25143 closed by steve.dower #25159: Regression in time to import a module http://bugs.python.org/issue25159 closed by serhiy.storchaka #25161: Missing periods at the end of sentences http://bugs.python.org/issue25161 closed by martin.panter #25163: Windows installer in AllUsers mode presents wrong installation http://bugs.python.org/issue25163 closed by steve.dower #25164: Windows default installation path is inconsistent between per- http://bugs.python.org/issue25164 closed by steve.dower #25207: ICC compiler warnings http://bugs.python.org/issue25207 closed by haypo #25210: Special-case NoneType() in do_richcompare() http://bugs.python.org/issue25210 closed by haypo #25254: Idle: debugger source line highlighting fails again http://bugs.python.org/issue25254 closed by terry.reedy #25274: sys.setrecursionlimit() must fail if the current recursion dep http://bugs.python.org/issue25274 closed by haypo #25277: test_sigwaitinfo() of test_eintr hangs on randomly on FreeBSD http://bugs.python.org/issue25277 closed by haypo #25322: contextlib.suppress not tested for nested usage http://bugs.python.org/issue25322 closed by martin.panter #25335: ast.literal_eval fails to parse numbers with leading "+" http://bugs.python.org/issue25335 closed by terry.reedy #25344: Enhancement to Logging - Logging Stack http://bugs.python.org/issue25344 closed by python-dev #25349: Use _PyBytesWriter for bytes%args http://bugs.python.org/issue25349 closed by haypo #25353: Use _PyBytesWriter for unicode escape and raw unicode escape e http://bugs.python.org/issue25353 closed by haypo #25354: test_datetime failing http://bugs.python.org/issue25354 closed by tim.peters #25357: Add an optional newline parameter to binascii.b2a_base64() to http://bugs.python.org/issue25357 closed by haypo #25358: Unexpected behaviour when converting large float to int http://bugs.python.org/issue25358 closed by eryksun #25361: Is python-3-5-0.exe compiled with SSE2 instrutions? If so shou http://bugs.python.org/issue25361 closed by steve.dower #25362: In threading module, use with instead of try finally http://bugs.python.org/issue25362 closed by python-dev #25363: x=[1,2,3].append([1,2,3]) bug http://bugs.python.org/issue25363 closed by eric.smith #25364: zipfile broken with --without-threads http://bugs.python.org/issue25364 closed by serhiy.storchaka #25365: test_pickle fails with --without-threads http://bugs.python.org/issue25365 closed by serhiy.storchaka #25367: test_coroutines fails with --without-threads http://bugs.python.org/issue25367 closed by python-dev #25368: test_eintr fails with --without-threads http://bugs.python.org/issue25368 closed by python-dev #25369: test_regrtest fails with --without-threads http://bugs.python.org/issue25369 closed by python-dev #25371: select.select docstring needs comma http://bugs.python.org/issue25371 closed by python-dev #25372: load_module() does not link submodule to parent package http://bugs.python.org/issue25372 closed by brett.cannon #25373: test.regrtest: -jN (with N != 1) + --slow + child error or int http://bugs.python.org/issue25373 closed by python-dev #25374: Deficiencies in type hint usage in Python standard libraries http://bugs.python.org/issue25374 closed by r.david.murray #25375: Don't mention 2.2 in the 3.x docs http://bugs.python.org/issue25375 closed by python-dev #25378: Roundoff error on OS X http://bugs.python.org/issue25378 closed by ezio.melotti #25379: Changes in traceback broke existing code (Python 3.5) http://bugs.python.org/issue25379 closed by berker.peksag #25380: Incorrect protocol for the STACK_GLOBAL opcode http://bugs.python.org/issue25380 closed by serhiy.storchaka #25382: pickletools.dis(): output memo id for MEMOIZE http://bugs.python.org/issue25382 closed by serhiy.storchaka #25383: Docs: Broken link http://bugs.python.org/issue25383 closed by berker.peksag #25384: Use _PyBytesWriter in the binascii module http://bugs.python.org/issue25384 closed by haypo #25389: It crashes as long as I press "(parenthese) http://bugs.python.org/issue25389 closed by ned.deily #25391: difflib.SequenceMatcher(...).ratio gives bad/wrong/unexpected http://bugs.python.org/issue25391 closed by tim.peters #25396: A Python runtime not could be located. http://bugs.python.org/issue25396 closed by zach.ware #25399: Optimize bytearray % args http://bugs.python.org/issue25399 closed by haypo #25401: Optimize bytes.fromhex() and bytearray.fromhex() http://bugs.python.org/issue25401 closed by haypo #25406: OrderedDict.move_to_end may cause crash in python 3.5 http://bugs.python.org/issue25406 closed by serhiy.storchaka #25418: Minor markup issue in reference/datamodel docs http://bugs.python.org/issue25418 closed by berker.peksag

1 0

PEP 0484 - the Numeric Tower
by Laura Creighton 15 Oct '15

15 Oct '15

Any chance of adding Decimal to the list of things that are also acceptable for things annotated float? Laura

11 23

under what circumstances can python still exhibit "high water mark" memory usage?
by Chris Withers 14 Oct '15

14 Oct '15

Hi All, I'm having trouble with some python processes that are using 3GB+ of memory but when I inspect them with either heapy or meliae, injected via pyrasite, those tools only report total memory usage to be 119Mb. This feels like the old "python high water mark" problem, but I thought that was fixed in 2.6/3.0? Under what circumstances can a Python process still exhibit high memory usage that tools like heapy don't know about? cheers, Chris PS: Full details here of libraries being used and versions here: https://groups.google.com/forum/#!topic/celery-users/SsTRZ7-mDMI This post feels related and seems to suggest the high water mark problem is still there: http://chase-seibert.github.io/blog/2013/08/03/diagnosing-memory-leaks-pyth…

3 4

Rationale behind lazy map/filter
by Stefan Mihaila 13 Oct '15

13 Oct '15

Hey guys, Could someone clarify for me why it is a good idea to have map return an iterator that is iterable multiple times and acts as an empty iterator in subsequent iterations? > r = range(10) > list(r) == list(r) True > a=map(lambda x:x+1, [1,2,3]) > list(a) == list(a) False Wouldn't it be safer for everyone if attempting to traverse some map iterator a second time would just throw a runtime error rather than act as an empty iterator? Or am I missing something obvious? I understand that chaining functional operators like map/reduce/filter is fairly common and not materializing intermediate computation can improve performance in some cases (or even turn infinite into finite computation), but I also find myself running into non-obvious bugs because of this. Maybe it's just python2 habits, but I assume I'm not the only one carelessly thinking that "iterating over an input a second time will result in the same thing as the first time (or raise an error)". What would you say is a good practice to avoid accidentally passing the result of a map to a function traversing its inputs multiple times? I assume there needs to be an agreement on these things for larger codebases. Should the caller always materialize the result of a map before passing it elsewhere? Or should the callee always materialize its inputs before using them? Or should we just document whether the function traverses its input only once, such as through some type annotation ("def f(x: TraversableOnce[T]")? If we refactor `f' such that it used to traverse `x' only once, but now traverses it twice, should we go and update all callers? Would type hints solve this? More obvious assumption errors, such as "has a method called __len__" throw a runtime error thanks to duck typing, but more subtle ones, such as this one, are harder to express. Thanks, Stefan

9 13

Summary of Python tracker Issues
by Python tracker 09 Oct '15

09 Oct '15

ACTIVITY SUMMARY (2015-10-02 - 2015-10-09) 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 5144 (-11) closed 31971 (+65) total 37115 (+54) Open issues with patches: 2271 Issues opened (35) ================== #12939: Add new io.FileIO using the native Windows API http://bugs.python.org/issue12939 reopened by haypo #22413: Bizarre StringIO(newline="\r\n") translation http://bugs.python.org/issue22413 reopened by martin.panter #25303: py_compile disregards PYTHONDONTWRITEBYTECODE and -B http://bugs.python.org/issue25303 opened by proski #25307: Enhancing the argparse help output http://bugs.python.org/issue25307 opened by Sworddragon #25311: Add f-string support to tokenize.py http://bugs.python.org/issue25311 opened by skrah #25312: Cryptic error message if incorrect spec is set on a callable m http://bugs.python.org/issue25312 opened by uranusjr #25313: IDLE: gracefully handle themes (or keysets, or ...) not presen http://bugs.python.org/issue25313 opened by markroseman #25314: Documentation: argparse's actions store_{true,false} default t http://bugs.python.org/issue25314 opened by Julien Baley #25320: unittest loader.py TypeError when code directory contains a so http://bugs.python.org/issue25320 opened by Victor van den Elzen #25322: contextlib.suppress not tested for nested usage http://bugs.python.org/issue25322 opened by RazerM #25324: Importing tokenize modifies token http://bugs.python.org/issue25324 opened by serhiy.storchaka #25327: Python 3.5 Windows 10 Installation Fails With Corrupt Director http://bugs.python.org/issue25327 opened by Max Farrell #25329: test_json crashes with stack overflow on Windows http://bugs.python.org/issue25329 opened by zach.ware #25330: Docs for pkgutil.get_data inconsistent with semantics http://bugs.python.org/issue25330 opened by Antony.Lee #25331: https://docs.python.org/3.5/using/windows.html should list whc http://bugs.python.org/issue25331 opened by lac #25334: telnetlib: process_rawq() and binary data http://bugs.python.org/issue25334 opened by mwalle #25335: ast.literal_eval fails to parse numbers with leading "+" http://bugs.python.org/issue25335 opened by Scott Turner #25337: weakref.finalize documentation refers to old interpreter shutd http://bugs.python.org/issue25337 opened by josh.r #25338: urllib bypasses all hosts if proxyoverride includes an empty e http://bugs.python.org/issue25338 opened by Jung-chih Wei #25339: sys.stdout.errors is set to "surrogateescape" http://bugs.python.org/issue25339 opened by serhiy.storchaka #25340: libraries variable in setup.py ignore for multiprocessing modu http://bugs.python.org/issue25340 opened by davyg #25341: File mode wb+ appears as rb+ http://bugs.python.org/issue25341 opened by Mark.Williams #25342: test_json segfault on OpenBSD http://bugs.python.org/issue25342 opened by rpointel #25343: Document atomic operations on builtin types http://bugs.python.org/issue25343 opened by Dima.Tisnek #25344: Enhancement to Logging - Logging Stack http://bugs.python.org/issue25344 opened by dasilver(a)cisco.com #25345: Unable to install Python 3.5 on Windows 10 http://bugs.python.org/issue25345 opened by Gowtham NM #25347: assert_has_calls output is formatted inconsistently http://bugs.python.org/issue25347 opened by rzimmerman #25348: Update pgo_build.bat to use --pgo flag for regrtest http://bugs.python.org/issue25348 opened by brett.cannon #25349: Use _PyBytesWriter for bytes%args http://bugs.python.org/issue25349 opened by haypo #25351: pyvenv activate script failure with specific bash option http://bugs.python.org/issue25351 opened by s-wakaba #25352: Add 'make this my default python' to windows installs for Pyth http://bugs.python.org/issue25352 opened by lac #25353: Use _PyBytesWriter for unicode escape and raw unicode escape e http://bugs.python.org/issue25353 opened by haypo #25354: test_datetime failing http://bugs.python.org/issue25354 opened by shanmbic #25355: Windows 3.5 installer does not add python to "App Paths" key http://bugs.python.org/issue25355 opened by oscarbenjamin #25356: Idle (Python 3.4 on Ubuntu) does not allow typing accents http://bugs.python.org/issue25356 opened by Gian Carlo Martinelli Most recent 15 issues with no replies (15) ========================================== #25356: Idle (Python 3.4 on Ubuntu) does not allow typing accents http://bugs.python.org/issue25356 #25355: Windows 3.5 installer does not add python to "App Paths" key http://bugs.python.org/issue25355 #25351: pyvenv activate script failure with specific bash option http://bugs.python.org/issue25351 #25348: Update pgo_build.bat to use --pgo flag for regrtest http://bugs.python.org/issue25348 #25347: assert_has_calls output is formatted inconsistently http://bugs.python.org/issue25347 #25341: File mode wb+ appears as rb+ http://bugs.python.org/issue25341 #25340: libraries variable in setup.py ignore for multiprocessing modu http://bugs.python.org/issue25340 #25339: sys.stdout.errors is set to "surrogateescape" http://bugs.python.org/issue25339 #25337: weakref.finalize documentation refers to old interpreter shutd http://bugs.python.org/issue25337 #25334: telnetlib: process_rawq() and binary data http://bugs.python.org/issue25334 #25331: https://docs.python.org/3.5/using/windows.html should list whc http://bugs.python.org/issue25331 #25320: unittest loader.py TypeError when code directory contains a so http://bugs.python.org/issue25320 #25312: Cryptic error message if incorrect spec is set on a callable m http://bugs.python.org/issue25312 #25293: Hooking Thread/Process instantiation in concurrent.futures. http://bugs.python.org/issue25293 #25292: ssl socket gets into broken state when client exits during han http://bugs.python.org/issue25292 Most recent 15 issues waiting for review (15) ============================================= #25353: Use _PyBytesWriter for unicode escape and raw unicode escape e http://bugs.python.org/issue25353 #25349: Use _PyBytesWriter for bytes%args http://bugs.python.org/issue25349 #25347: assert_has_calls output is formatted inconsistently http://bugs.python.org/issue25347 #25338: urllib bypasses all hosts if proxyoverride includes an empty e http://bugs.python.org/issue25338 #25334: telnetlib: process_rawq() and binary data http://bugs.python.org/issue25334 #25322: contextlib.suppress not tested for nested usage http://bugs.python.org/issue25322 #25320: unittest loader.py TypeError when code directory contains a so http://bugs.python.org/issue25320 #25314: Documentation: argparse's actions store_{true,false} default t http://bugs.python.org/issue25314 #25313: IDLE: gracefully handle themes (or keysets, or ...) not presen http://bugs.python.org/issue25313 #25311: Add f-string support to tokenize.py http://bugs.python.org/issue25311 #25300: Enable Intel MPX (Memory protection Extensions) feature http://bugs.python.org/issue25300 #25287: test_crypt fails on OpenBSD http://bugs.python.org/issue25287 #25285: regrtest: run tests in subprocesses with -j1 on buildbots http://bugs.python.org/issue25285 #25274: sys.setrecursionlimit() must fail if the current recursion dep http://bugs.python.org/issue25274 #25270: codecs.escape_encode systemerror on empty byte string http://bugs.python.org/issue25270 Top 10 most discussed issues (10) ================================= #25300: Enable Intel MPX (Memory protection Extensions) feature http://bugs.python.org/issue25300 23 msgs #25228: Regression in cookie parsing with brackets and quotes http://bugs.python.org/issue25228 19 msgs #25294: Absolute imports fail in some cases where relative imports wou http://bugs.python.org/issue25294 11 msgs #25342: test_json segfault on OpenBSD http://bugs.python.org/issue25342 11 msgs #25157: Installing Python 3.5.0 32bit on Windows 8.1 64bit system give http://bugs.python.org/issue25157 9 msgs #25311: Add f-string support to tokenize.py http://bugs.python.org/issue25311 8 msgs #25258: HtmlParser doesn't handle void element tags correctly http://bugs.python.org/issue25258 7 msgs #25313: IDLE: gracefully handle themes (or keysets, or ...) not presen http://bugs.python.org/issue25313 7 msgs #25322: contextlib.suppress not tested for nested usage http://bugs.python.org/issue25322 7 msgs #5380: pty.read raises IOError when slave pty device is closed http://bugs.python.org/issue5380 6 msgs Issues closed (63) ================== #10967: move regrtest over to using more unittest infrastructure http://bugs.python.org/issue10967 closed by haypo #11365: Integrate Buildroot patches (cross-compilation) http://bugs.python.org/issue11365 closed by haypo #12006: strptime should implement %G, %V and %u directives http://bugs.python.org/issue12006 closed by belopolsky #12314: regrtest checks (os.environ, sys.path, etc.) are hard to use http://bugs.python.org/issue12314 closed by haypo #12346: Python source code build fails with old mercurial http://bugs.python.org/issue12346 closed by serhiy.storchaka #13466: new timezones http://bugs.python.org/issue13466 closed by belopolsky #13954: Add regrtest option to record test results to a file http://bugs.python.org/issue13954 closed by haypo #14423: Getting the starting date of iso week from a week number and a http://bugs.python.org/issue14423 closed by belopolsky #16099: robotparser doesn't support request rate and crawl delay param http://bugs.python.org/issue16099 closed by berker.peksag #16701: Docs missing the behavior of += (in-place add) for lists. http://bugs.python.org/issue16701 closed by martin.panter #16802: fileno argument to socket.socket() undocumented http://bugs.python.org/issue16802 closed by berker.peksag #17548: unittest.mock: test_create_autospec_unbound_methods is skipped http://bugs.python.org/issue17548 closed by haypo #19518: Add new PyRun_xxx() functions to not encode the filename http://bugs.python.org/issue19518 closed by haypo #19519: Parser: don't transcode input string to UTF-8 if it is already http://bugs.python.org/issue19519 closed by haypo #19817: tracemalloc add a memory limit feature http://bugs.python.org/issue19817 closed by haypo #19835: Add a MemoryError singleton to fix an unlimited loop when the http://bugs.python.org/issue19835 closed by haypo #19917: [httplib] logging information for request is not pretty printe http://bugs.python.org/issue19917 closed by berker.peksag #20910: Make sleep configurable in tests http://bugs.python.org/issue20910 closed by haypo #20964: Add support.check_time_delta() http://bugs.python.org/issue20964 closed by haypo #21373: robotparser: Automatically call modified function in read() http://bugs.python.org/issue21373 closed by berker.peksag #22323: Rewrite PyUnicode_AsWideChar() and PyUnicode_AsWideCharString( http://bugs.python.org/issue22323 closed by haypo #22324: Use PyUnicode_AsWideCharString() instead of PyUnicode_AsUnicod http://bugs.python.org/issue22324 closed by haypo #22444: Floor divide should return int http://bugs.python.org/issue22444 closed by belopolsky #22806: regrtest: add switch -c to run only modified tests http://bugs.python.org/issue22806 closed by haypo #23543: encoding error trying to save string to file http://bugs.python.org/issue23543 closed by serhiy.storchaka #23919: [Windows] test_os fails several C-level assertions http://bugs.python.org/issue23919 closed by steve.dower #23972: Asyncio reuseport http://bugs.python.org/issue23972 closed by gvanrossum #24657: CGIHTTPServer module discard continuous '/' letters from param http://bugs.python.org/issue24657 closed by martin.panter #24806: Inheriting from NoneType does not fail consistently http://bugs.python.org/issue24806 closed by python-dev #24820: IDLE themes for light on dark http://bugs.python.org/issue24820 closed by terry.reedy #25045: smtplib throws exception TypeError: readline() http://bugs.python.org/issue25045 closed by r.david.murray #25175: Documentation-Tkinter Clarify module spelling change in Python http://bugs.python.org/issue25175 closed by terry.reedy #25188: regrtest.py improvement for Profile Guided Optimization builds http://bugs.python.org/issue25188 closed by brett.cannon #25220: Enhance and refactor test.regrtest (convert regrtest.py to a p http://bugs.python.org/issue25220 closed by haypo #25232: CGIRequestHandler behave incorrectly with query component cons http://bugs.python.org/issue25232 closed by martin.panter #25266: mako benchmark not working in Python 3.6 http://bugs.python.org/issue25266 closed by brett.cannon #25286: views are not sequences http://bugs.python.org/issue25286 closed by martin.panter #25290: csv.reader: minor docstring typo http://bugs.python.org/issue25290 closed by berker.peksag #25298: Add lock and rlock weakref tests http://bugs.python.org/issue25298 closed by rhettinger #25301: Optimize UTF-8 decoder with error handlers http://bugs.python.org/issue25301 closed by haypo #25302: Memory Leaks with Address Sanitizer http://bugs.python.org/issue25302 closed by skrah #25304: Add run_coroutine_threadsafe() to asyncio http://bugs.python.org/issue25304 closed by gvanrossum #25305: Windows: python opens a popup and flood stderr with assertion http://bugs.python.org/issue25305 closed by steve.dower #25306: test_huntrleaks_fd_leak() of test_regrtest hangs on Windows http://bugs.python.org/issue25306 closed by haypo #25308: Multiple names can target the same namespace http://bugs.python.org/issue25308 closed by benjamin.peterson #25309: askopenfilename crashes on XP with "Show pop-up description fo http://bugs.python.org/issue25309 closed by terry.reedy #25310: End mark argument for StreamReader.readline() method http://bugs.python.org/issue25310 closed by gvanrossum #25315: Make it clear in the collections Python source code that Order http://bugs.python.org/issue25315 closed by zach.ware #25316: distutils: broken error reporting about vcvarsall.bat http://bugs.python.org/issue25316 closed by steve.dower #25317: Convert test_tokenize to unittests http://bugs.python.org/issue25317 closed by serhiy.storchaka #25318: Add _PyBytesWriter API to optimize Unicode encoders http://bugs.python.org/issue25318 closed by haypo #25319: Keep lock type when reseting internal locks http://bugs.python.org/issue25319 closed by python-dev #25321: Null Dereference "subname" in zipimport.c http://bugs.python.org/issue25321 closed by benjamin.peterson #25323: Bus error: 10 when executing recursive program http://bugs.python.org/issue25323 closed by benjamin.peterson #25325: UTF-16LE, UTF-16BE, UTF-32LE, and UTF-32BE encodings don't add http://bugs.python.org/issue25325 closed by eryksun #25326: Improve error message for "character buffer objects" http://bugs.python.org/issue25326 closed by rhettinger #25328: ValueError in smtpd.py __init__() is not raised http://bugs.python.org/issue25328 closed by r.david.murray #25332: [Errno 10035] A non-blocking socket operation could not be com http://bugs.python.org/issue25332 closed by zach.ware #25333: .1 + .2 == .3 should be True http://bugs.python.org/issue25333 closed by eric.smith #25336: Segmentation fault on Mavericks consistent crashing of softwar http://bugs.python.org/issue25336 closed by ned.deily #25346: test_regrtest fails because 'sys' is not imported. http://bugs.python.org/issue25346 closed by steve.dower #25350: Stronger type enforcement (feature request) http://bugs.python.org/issue25350 closed by r.david.murray #762963: timemodule.c: Python loses current timezone http://bugs.python.org/issue762963 closed by belopolsky

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An example of Python 3 promotion attitude
by Maciej Fijalkowski 08 Oct '15

08 Oct '15

There was a discussion a while ago about python 3 and the attitude on social media and there was a lack of examples. Here is one example: https://www.reddit.com/r/Python/comments/3nl5ut/ninite_the_popular_website_… According to some people, it is everybodys job to promote python 3 and force people to upgrade. This is really not something I enjoy (people telling me pypy should promote python 3 - it's not really our job). Now I sometimes feel that there is not enough sentiment in python-dev to distance from such ideas. It *is* python-dev job to promote python3, but it's also python-dev job sometimes to point out that whatever helps in promoting the python ecosystem (e.g. in case of pypy is speed) is a good enough reason to do those things. I wonder what are other people ideas about that. Cheers, fijal

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Migrating to Python 3: the python 3 install issue
by Terry Reedy 07 Oct '15

07 Oct '15

On python-list, Chris Warrick reported (thread title): "The Nikola project is deprecating Python 2.7 (+2.x/3.x user survey results)" This is for the November release, with 2.7 dropped in the next version next year. (Nikola is a cross-platform unicode-based app for building static websites and blogs from user-written templates and (marked-up) text files. https://getnikola.com/ ) Since users do not write code to use Nikola, the survey was about installation of Python 3. At present, 1/2 have 3.x only, 1/3 2.x only, and 1/6 both. (So much for 'nobody uses 3.x for real work'.) Most of the 2.x only people are able and willing to install 3.x. https://getnikola.com/blog/env-survey-results-and-the-future-of-python-27.h… When Stefan Behnel asked why they did not drop the hard-to-maintain 2.7 version once they ported to 3.3, Chris answered > We did it now because it all started with frustration with 2.7 [0]. > Also, doing it back in 2012/2013 would be problematic, because back > then not all Linux distros had an easily installable Python 3 stack > (and RHEL 7 still doesn’t have one in the default repos) > > [0]: http://ralsina.me/weblog/posts/floss-decision-making-in-action.html -- Terry Jan Reedy

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