Mailman 3 March 2018 - Python-Dev

PEP 541 - Accepted
by Mark Mangoba March 23, 2018

March 23, 2018

Hi All, As the BDFL-Delegate, I’m happy to announce PEP 541 has been accepted. PEP 541 has been voted by the packaging-wg (https://wiki.python.org/psf/ PackagingWG/Charter): - Donald Stufft - Dustin Ingram - Ernest W. Durbin III - Ewa Jodlowska - Kenneth Reitz - Mark Mangoba - Nathaniel J. Smith - Nick Coghlan - Nicole Harris - Sumana Harihareswara Thank you to the packaging-wg and to everyone that has contributed to PEP 541. Best regards, Mark -- Mark Mangoba | PSF IT Manager | Python Software Foundation | mmangoba(a)python.org | python.org | Infrastructure Staff: infrastructure-staff(a)python.org | GPG: 2DE4 D92B 739C 649B EBB8 CCF6 DC05 E024 5F4C A0D1

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Deprecating float.is_integer()
by Serhiy Storchaka March 23, 2018

March 23, 2018

I searched usages of is_integer() on GitHub and have found that it is used *only* in silly code like (x/5).is_integer(), (x**0.5).is_integer() (or even (x**(1/3)).is_integer()) and in loops like: i = 0 while i < 20: if i.is_integer(): print(i) i += 0.1 (x/5).is_integer() is an awful way of determining the divisibility by 5. It returns wrong result for large integers and some floats. (x % 5 == 0) is a more clear and reliable way (or PEP 8 compliant (not x % 5)). Does anybody know examples of the correct use of float.is_integer() in real programs? For now it looks just like a bug magnet. I suggest to deprecate it in 3.7 or 3.8 and remove in 3.9 or 3.10. If you even need to test if a float is an exact integer, you could use (not x % 1.0). It is even faster than x.is_integer().

11 25

Do we have vlookup function
by Rohit Adhikari March 22, 2018

March 22, 2018

Do we have vlookup function which can be used in dataframe same as used in excel. Can you please provide the pointer for the same? Thanks!!!

2 1

ThreadedProcessPoolExecutor
by Roberto Martínez March 21, 2018

March 21, 2018

Hi, I've made a custom concurrent.futures.Executor mixing the ProcessPoolExecutor and ThreadPoolExecutor. I've published it here: https://github.com/nilp0inter/threadedprocess This executor is very similar to a ProcessPoolExecutor, but each process in the pool have it's own ThreadPoolExecutor inside. The motivation for this executor is mitigate the problem we have in a project were we have a very large number of long running IO bounded tasks, that have to run concurrently. Those long running tasks have sparse CPU bounded operations. To resolve this problem I considered multiple solutions: 1. Use asyncio to run the IO part as tasks and use a ProcessPoolExecutor to run the CPU bounded operations with "run_in_executor". Unfortunately the CPU operations depends on a large memory context, and using a ProcessPoolExecutor this way force the parent process to picklelize all the context to send it to the task, and because the context is so large, this operation is itself very CPU demanding. So it doesn't work. 2. Executing the IO/CPU bounded operations in different processes with multiprocessing.Process. This actually works, but the number of idle processes in the system is too large, resulting in a bad memory footprint. 3. Executing the IO/CPU bounded operations in threads. This doesn't work because the sum of all CPU operations saturate the core where the Python process is running and the other cores are wasted doing nothing. So I coded the ThreadedProcessPoolExecutor that helped me maintaining the number of processes under control (I just have one process per CPU core) allowing me to have a very high concurrency (hundreds of threads per process). I have a couple of questions: The first one is about the license. Given that I copied the majority of the code from the concurrent.futures library, I understand that I have to publish the code under the PSF LICENSE. Is this correct? My second question is about the package namespace. Given that this is an concurrent.futures.Executor subclass I understand that more intuitive place to locate it is under concurrent.futures. Is this a suitable use case for namespace packages? Is this a good idea? Best regards, Roberto

2 2

What is the purpose of NEXT_BLOCK()?
by Serhiy Storchaka March 21, 2018

March 21, 2018

There is the NEXT_BLOCK() macro in compile.c. It creates a new block, creates an implicit jump from the current block to the new block, and sets it as the current block. But why it is used? All seems working if remove NEXT_BLOCK(). If there was a need of NEXT_BLOCK() (if it reduces the computational complexity of compilation or allows some optimizations), it should be documented, and we should analyze the code and add missed NEXT_BLOCK() where they are needed, and perhaps add new tests. Otherwise it can be removed.

2 2

Hello!
by Agnostic Dev March 20, 2018

March 20, 2018

My name is Matt Eaton (Agnostic Dev) and I am just joining the mailing list so I wanted to reach out and say hello!

2 2

ttk.Treeview.insert() does not allow to insert item with iid=0
by Игорь Яковченко March 20, 2018

March 20, 2018

Hello, I found a possible bug with ttk.Treeview widget. I'm working on program that uses tkinter UI. I use ttk.Treeview to display some objects and I want to use integer iid of items. For example, I insert a row with treeview.insert(... iid=0, ...). But I encountered a problem when I try to get this item from treeview by iid when iid =0. There is no item with such iid. This item has autogenerated iid just like it's not specified. I investigated problem and found that in ttk.py, Treeview.insert(... iid=None, ...) in method's body has a check: if iid: res = self.tk.call(self._w, "insert", parent, index, "-id", iid, *opts) else: res = self.tk.call(self._w, "insert", parent, index, *opts) It means that if iid is "True" then use it else autogenerate it. Maybe there should be "if iid is not None", not "if iid"? Or there are some reasons to do check this way? Igor Yakovchenko <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campai…> Без вирусов. www.avast.ru <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campai…> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>

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Summary of Python tracker Issues
by Python tracker March 16, 2018

March 16, 2018

ACTIVITY SUMMARY (2018-03-09 - 2018-03-16) 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 6525 ( +9) closed 38312 (+41) total 44837 (+50) Open issues with patches: 2546 Issues opened (44) ================== #27645: Supporting native backup facility of SQLite https://bugs.python.org/issue27645 reopened by berker.peksag #33014: Clarify str.isidentifier docstring; fix keyword.iskeyword docs https://bugs.python.org/issue33014 reopened by terry.reedy #33037: Skip sending/receiving after SSL transport closing https://bugs.python.org/issue33037 opened by asvetlov #33038: GzipFile doesn't always ignore None as filename https://bugs.python.org/issue33038 opened by da #33039: int() and math.trunc don't accept objects that only define __i https://bugs.python.org/issue33039 opened by ncoghlan #33041: Issues with "async for" https://bugs.python.org/issue33041 opened by serhiy.storchaka #33042: New 3.7 startup sequence crashes PyInstaller https://bugs.python.org/issue33042 opened by htgoebel #33043: Add a 'Contributing to Docs' link at the bottom of docs.python https://bugs.python.org/issue33043 opened by willingc #33044: pdb from base class, get inside a method of derived class https://bugs.python.org/issue33044 opened by ishanSrt #33046: IDLE option to strip trailing whitespace automatically on save https://bugs.python.org/issue33046 opened by rhettinger #33047: "RuntimeError: dictionary changed size during iteration" using https://bugs.python.org/issue33047 opened by Delgan #33048: macOS job broken on Travis CI https://bugs.python.org/issue33048 opened by pitrou #33049: itertools.count() confusingly mentions zip() and sequence numb https://bugs.python.org/issue33049 opened by trey #33050: Centralized documentation of assumptions made by C code https://bugs.python.org/issue33050 opened by tvanslyke #33051: IDLE: Create new tab for editor options in configdialog https://bugs.python.org/issue33051 opened by csabella #33052: Sporadic segmentation fault in test_datetime https://bugs.python.org/issue33052 opened by pitrou #33053: Running a module with `-m` will add empty directory to sys.pat https://bugs.python.org/issue33053 opened by ztane #33054: unittest blocks when testing function using multiprocessing.Po https://bugs.python.org/issue33054 opened by Kenneth Chik #33055: bytes does not implement __bytes__() https://bugs.python.org/issue33055 opened by FHTMitchell #33057: logging.Manager.logRecordFactory is never used https://bugs.python.org/issue33057 opened by feinsteinben #33058: Enhance Python's Memory Instrumentation with COUNT_ALLOCS https://bugs.python.org/issue33058 opened by elizondo93 #33059: netrc module validates file mode only for /home/user/.netrc https://bugs.python.org/issue33059 opened by akoeltringer #33061: NoReturn missing from __all__ in typing.py https://bugs.python.org/issue33061 opened by Allen Tracht #33062: ssl_renegotiate() doesn't seem to be exposed https://bugs.python.org/issue33062 opened by vitaly.krug #33063: failed to build _ctypes: undefined reference to `ffi_closure_F https://bugs.python.org/issue33063 opened by siming85 #33065: IDLE debugger: problem importing user created module https://bugs.python.org/issue33065 opened by jcdlr #33066: raise an exception from multiple positions break the traceback https://bugs.python.org/issue33066 opened by hubo1016 #33067: http.client no longer sends HTTP request in one TCP package https://bugs.python.org/issue33067 opened by christian.heimes #33069: Maintainer information discarded when writing PKG-INFO https://bugs.python.org/issue33069 opened by p-ganssle #33070: Add platform triplet for RISC-V https://bugs.python.org/issue33070 opened by schwab #33071: Document that PyPI no longer requires 'register' https://bugs.python.org/issue33071 opened by p-ganssle #33073: Add as_integer_ratio() to int() objects https://bugs.python.org/issue33073 opened by rhettinger #33074: dbm corrupts index on macOS (_dbm module) https://bugs.python.org/issue33074 opened by nneonneo #33076: Trying to cleanly terminate a threaded Queue at exit of progra https://bugs.python.org/issue33076 opened by Delgan #33077: typing: Unexpected result with value of instance of class inhe https://bugs.python.org/issue33077 opened by Евгений Махмудов #33078: Queue with maxsize can lead to deadlocks https://bugs.python.org/issue33078 opened by tomMoral #33079: subprocess: document the interaction between subprocess.Popen https://bugs.python.org/issue33079 opened by sloonz #33080: regen-importlib is causing build races against other regen-all https://bugs.python.org/issue33080 opened by Alexander Kanavin #33081: multiprocessing Queue leaks a file descriptor associated with https://bugs.python.org/issue33081 opened by Henrique Andrade #33082: multiprocessing docs bury very important 'callback=' args https://bugs.python.org/issue33082 opened by chadmiller-amzn #33083: math.factorial accepts non-integral Decimal instances https://bugs.python.org/issue33083 opened by mark.dickinson #33084: Computing median, median_high an median_low in statistics libr https://bugs.python.org/issue33084 opened by dcasmr #33085: *** Error in `python': double free or corruption (out): 0x0000 https://bugs.python.org/issue33085 opened by chenkai #33086: pip: IndexError https://bugs.python.org/issue33086 opened by hearot Most recent 15 issues with no replies (15) ========================================== #33086: pip: IndexError https://bugs.python.org/issue33086 #33085: *** Error in `python': double free or corruption (out): 0x0000 https://bugs.python.org/issue33085 #33080: regen-importlib is causing build races against other regen-all https://bugs.python.org/issue33080 #33079: subprocess: document the interaction between subprocess.Popen https://bugs.python.org/issue33079 #33078: Queue with maxsize can lead to deadlocks https://bugs.python.org/issue33078 #33076: Trying to cleanly terminate a threaded Queue at exit of progra https://bugs.python.org/issue33076 #33071: Document that PyPI no longer requires 'register' https://bugs.python.org/issue33071 #33070: Add platform triplet for RISC-V https://bugs.python.org/issue33070 #33067: http.client no longer sends HTTP request in one TCP package https://bugs.python.org/issue33067 #33066: raise an exception from multiple positions break the traceback https://bugs.python.org/issue33066 #33061: NoReturn missing from __all__ in typing.py https://bugs.python.org/issue33061 #33059: netrc module validates file mode only for /home/user/.netrc https://bugs.python.org/issue33059 #33053: Running a module with `-m` will add empty directory to sys.pat https://bugs.python.org/issue33053 #33052: Sporadic segmentation fault in test_datetime https://bugs.python.org/issue33052 #33051: IDLE: Create new tab for editor options in configdialog https://bugs.python.org/issue33051 Most recent 15 issues waiting for review (15) ============================================= #33082: multiprocessing docs bury very important 'callback=' args https://bugs.python.org/issue33082 #33078: Queue with maxsize can lead to deadlocks https://bugs.python.org/issue33078 #33070: Add platform triplet for RISC-V https://bugs.python.org/issue33070 #33069: Maintainer information discarded when writing PKG-INFO https://bugs.python.org/issue33069 #33063: failed to build _ctypes: undefined reference to `ffi_closure_F https://bugs.python.org/issue33063 #33058: Enhance Python's Memory Instrumentation with COUNT_ALLOCS https://bugs.python.org/issue33058 #33057: logging.Manager.logRecordFactory is never used https://bugs.python.org/issue33057 #33051: IDLE: Create new tab for editor options in configdialog https://bugs.python.org/issue33051 #33048: macOS job broken on Travis CI https://bugs.python.org/issue33048 #33042: New 3.7 startup sequence crashes PyInstaller https://bugs.python.org/issue33042 #33041: Issues with "async for" https://bugs.python.org/issue33041 #33038: GzipFile doesn't always ignore None as filename https://bugs.python.org/issue33038 #33037: Skip sending/receiving after SSL transport closing https://bugs.python.org/issue33037 #33034: urllib.parse.urlparse and urlsplit not raising ValueError for https://bugs.python.org/issue33034 #33031: Questionable code in OrderedDict definition https://bugs.python.org/issue33031 Top 10 most discussed issues (10) ================================= #26680: Incorporating float.is_integer into the numeric tower and Deci https://bugs.python.org/issue26680 27 msgs #33073: Add as_integer_ratio() to int() objects https://bugs.python.org/issue33073 16 msgs #33014: Clarify str.isidentifier docstring; fix keyword.iskeyword docs https://bugs.python.org/issue33014 15 msgs #27645: Supporting native backup facility of SQLite https://bugs.python.org/issue27645 10 msgs #32758: Stack overflow when parse long expression to AST https://bugs.python.org/issue32758 10 msgs #33042: New 3.7 startup sequence crashes PyInstaller https://bugs.python.org/issue33042 9 msgs #33077: typing: Unexpected result with value of instance of class inhe https://bugs.python.org/issue33077 8 msgs #32972: unittest.TestCase coroutine support https://bugs.python.org/issue32972 7 msgs #33034: urllib.parse.urlparse and urlsplit not raising ValueError for https://bugs.python.org/issue33034 7 msgs #33041: Issues with "async for" https://bugs.python.org/issue33041 7 msgs Issues closed (37) ================== #17288: cannot jump from a 'return' or 'exception' trace event https://bugs.python.org/issue17288 closed by serhiy.storchaka #21611: int() docstring - unclear what number is https://bugs.python.org/issue21611 closed by csabella #22674: RFE: Add signal.strsignal(): string describing a signal https://bugs.python.org/issue22674 closed by pitrou #25054: Capturing start of line '^' https://bugs.python.org/issue25054 closed by serhiy.storchaka #26701: Documentation for int constructor mentions __int__ but not __t https://bugs.python.org/issue26701 closed by ncoghlan #27984: singledispatch register should typecheck its argument https://bugs.python.org/issue27984 closed by lukasz.langa #28788: ConfigParser should be able to write config to a given filenam https://bugs.python.org/issue28788 closed by berker.peksag #29719: "Date" of what's new is confusing https://bugs.python.org/issue29719 closed by ned.deily #29804: test_ctypes test_pass_by_value fails on arm64 (aarch64) archit https://bugs.python.org/issue29804 closed by ned.deily #30249: improve struct.unpack_from's error message like struct.pack_in https://bugs.python.org/issue30249 closed by xiang.zhang #32227: singledispatch support for type annotations https://bugs.python.org/issue32227 closed by lukasz.langa #32328: ttk.Treeview: _tkinter.TclError: list element in quotes follow https://bugs.python.org/issue32328 closed by terry.reedy #32338: Save OrderedDict import in re https://bugs.python.org/issue32338 closed by serhiy.storchaka #32367: [Security] CVE-2017-17522: webbrowser.py in Python does not va https://bugs.python.org/issue32367 closed by ned.deily #32719: fatal error raised when Ctrl-C print loop https://bugs.python.org/issue32719 closed by pitrou #32757: Python 2.7 : Buffer Overflow vulnerability in exec() function https://bugs.python.org/issue32757 closed by serhiy.storchaka #32799: <class 'contextlib._GeneratorContextManager'> returned a resul https://bugs.python.org/issue32799 closed by ned.deily #32925: AST optimizer: Change a list into tuple in iterations and cont https://bugs.python.org/issue32925 closed by serhiy.storchaka #32946: Speed up import from non-packages https://bugs.python.org/issue32946 closed by serhiy.storchaka #32970: Improve disassembly of the MAKE_FUNCTION instruction https://bugs.python.org/issue32970 closed by serhiy.storchaka #32981: Catastrophic backtracking in poplib (CVE-2018-1060) and diffli https://bugs.python.org/issue32981 closed by ned.deily #32987: tokenize.py parses unicode identifiers incorrectly https://bugs.python.org/issue32987 closed by terry.reedy #32993: urllib and webbrowser.open() can open w/ file: protocol https://bugs.python.org/issue32993 closed by martin.panter #33020: Tkinter old style classes https://bugs.python.org/issue33020 closed by ned.deily #33021: Some fstat() calls do not release the GIL, possibly hanging al https://bugs.python.org/issue33021 closed by pitrou #33026: Fix jumping out of "with" block https://bugs.python.org/issue33026 closed by serhiy.storchaka #33036: test_selectors.PollSelectorTestCase failing on macOS 10.13.3 https://bugs.python.org/issue33036 closed by ned.deily #33040: Make itertools.islice supports negative values for start and s https://bugs.python.org/issue33040 closed by rhettinger #33045: SSL Dcumentation Error https://bugs.python.org/issue33045 closed by berker.peksag #33056: LEaking files in concurrent.futures.process https://bugs.python.org/issue33056 closed by pitrou #33060: Installation hangs at "Publishing product information" https://bugs.python.org/issue33060 closed by willingc #33064: lib2to3 fails on a trailing comma after **kwargs in a function https://bugs.python.org/issue33064 closed by lukasz.langa #33068: Inconsistencies in parsing (evaluating?) longstrings https://bugs.python.org/issue33068 closed by serhiy.storchaka #33072: The interpreter bytecodes for with statements are overly compl https://bugs.python.org/issue33072 closed by serhiy.storchaka #33075: typing.NamedTuple does not deduce Optional[] from using None a https://bugs.python.org/issue33075 closed by levkivskyi #1647489: zero-length match confuses re.finditer() https://bugs.python.org/issue1647489 closed by serhiy.storchaka #1693050: \w not helpful for non-Roman scripts https://bugs.python.org/issue1693050 closed by terry.reedy

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Re: [Python-Dev] Python 2.7 -- bugfix or security before EOL?
by Michael Scott Cuthbert March 14, 2018

March 14, 2018

> it still is in the time period before > EOL that other recent versions have gone to security only. Again, not relevant. You might want to read http://python3statement.org/.<http://python3statement.org/> I’m guessing my first message was unclear or able to be misunderstood in some part — I’m one of the frequent contributors to python3statement.org<http://python3statement.org> and have moved my own Python projects to Py3 only (the main one, music21, gets its 3.4+-only release this Saturday). I have NO desire to prolong the 2.7 pain. What I am referring to is the number of “needs backport to 2.7” tags for non-security-related bug-fixes in the issue tracker. (https://github.com/python/cpython/pulls?q=is%3Apr+is%3Aopen+label%3A%22need…<https://github.com/python/cpython/pulls?q=is:pr+is:open+label:"needs+backport+to+2.7">) My question was between now and 1 Jan 2020 should we still be fixing things in 2.7 that we’re not fixing in 3.5, or leave 2.7 in a security-only mode for the next 21 months? Looking at what has been closed recently, without getting a bpo for actually backporting, it appears that we’re sort of doing this in practice anyhow. Thanks! and even if my message was read differently than I intended, glad that it had a good effect. Michael Cuthbert (https://music21-mit.blogspot.com)

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[RELEASE] Python 3.6.5rc1 is now available for testing
by Ned Deily March 14, 2018

March 14, 2018

Announcing the immediate availability of Python 3.6.5 release candidate 1! Python 3.6.5rc1 is the first release candidate for Python 3.6.5, the next maintenance release of Python 3.6. While 3.6.5rc1 is a preview release and, thus, not intended for production environments, we encourage you to explore it and provide feedback via the Python bug tracker (https://bugs.python.org). 3.6.5 is planned for final release on 2018-03-26 with the next maintenance release expected to follow in about 3 months. You can find Python 3.6.5rc1 and more information here: https://www.python.org/downloads/release/python-365rc1/ Attention macOS users: as of 3.6.5rc1, there is a new additional installer variant for macOS 10.9+ that includes a built-in version of Tcl/Tk 8.6. This variant is expected to become the default variant in future releases. Check it out! -- Ned Deily nad(a)python.org -- []

1 0

Python 2.7 -- bugfix or security before EOL?
by Michael Scott Cuthbert March 12, 2018

March 12, 2018

I notice on https://devguide.python.org that Python 3.5 is in “security” status with an EOL of 2020-09-13 but Python 2.7 is in “bugfix” and has a likely earlier EOL. Will there be a period where Py2.7 is in security-only status before hitting EOL? Even if the EOL is set at the last possible date of 2020-12-31, it still is in the time period before EOL that other recent versions have gone to security only. (obviously recognizing that Py2.7 EOL is not just another EOL) I tried searching in archives for anything related to this status, but couldn’t find anything. apologies if I missed a discussion. - Michael Cuthbert

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Git hub : CLA Not Signed label
by Anthony Flury March 11, 2018

March 11, 2018

All, I submitted two Pull Requests last Sunday, only a few hours after I signed the CLA. I understand why the 'Knights who say ni' marked the Pull request as 'CLA Not Signed' Label at the time I submitted the Pull requests, but I was wondering when the Labels get reset. How often (if at all) does the bot look at old pull requests ? Thanks for any help you can give, I am sorry if the question sounds basic.

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Summary of Python tracker Issues
by Python tracker March 9, 2018

March 9, 2018

ACTIVITY SUMMARY (2018-03-02 - 2018-03-09) 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 6516 (+25) closed 38271 (+28) total 44787 (+53) Open issues with patches: 2546 Issues opened (39) ================== #31500: IDLE: Tiny font on HiDPI display https://bugs.python.org/issue31500 reopened by terry.reedy #32985: subprocess.Popen: Confusing documentation for restore_signals https://bugs.python.org/issue32985 opened by ntrrgc #32986: multiprocessing, default assumption of Pool size unhelpful https://bugs.python.org/issue32986 opened by M J Harvey #32987: tokenize.py parses unicode identifiers incorrectly https://bugs.python.org/issue32987 opened by steve #32989: IDLE: Fix pyparse.find_good_parse_start and its bad editor cal https://bugs.python.org/issue32989 opened by csabella #32990: Supporting extensible format(PCM) for wave.open(read-mode) https://bugs.python.org/issue32990 opened by acelletti #32993: urllib and webbrowser.open() can open w/ file: protocol https://bugs.python.org/issue32993 opened by yao zhihua #32995: Add a glossary entry for context variables https://bugs.python.org/issue32995 opened by serhiy.storchaka #32996: Improve What's New in 3.7 https://bugs.python.org/issue32996 opened by serhiy.storchaka #33000: IDLE Doc: Text consumes unlimited RAM, consoles likely not https://bugs.python.org/issue33000 opened by jbrearley #33001: Buffer overflow vulnerability in os.symlink on Windows (CVE-20 https://bugs.python.org/issue33001 opened by steve.dower #33002: Making a class formattable as hex/oct integer with printf-styl https://bugs.python.org/issue33002 opened by josh.r #33003: urllib: Document parse_http_list https://bugs.python.org/issue33003 opened by labrat #33006: docstring of filter function is incorrect https://bugs.python.org/issue33006 opened by Pierre Thibault #33007: Objects referencing private-mangled names do not roundtrip pro https://bugs.python.org/issue33007 opened by Antony.Lee #33008: urllib.request.parse_http_list incorrectly strips backslashes https://bugs.python.org/issue33008 opened by labrat #33010: os.path.isdir() returns True for broken directory symlinks or https://bugs.python.org/issue33010 opened by izbyshev #33012: Invalid function cast warnings with gcc 8 for METH_NOARGS https://bugs.python.org/issue33012 opened by siddhesh #33014: Clarify doc string for str.isidentifier() https://bugs.python.org/issue33014 opened by dabeaz #33015: Fix function cast warning in thread_pthread.h https://bugs.python.org/issue33015 opened by siddhesh #33016: nt._getfinalpathname may use uninitialized memory https://bugs.python.org/issue33016 opened by izbyshev #33017: Special set-cookie setting will bypass Cookielib https://bugs.python.org/issue33017 opened by LCatro #33018: Improve issubclass() error checking and message https://bugs.python.org/issue33018 opened by jab #33019: Review usage of environment variables in the stdlib https://bugs.python.org/issue33019 opened by pitrou #33020: Tkinter old style classes https://bugs.python.org/issue33020 opened by benkir07 #33021: Some fstat() calls do not release the GIL, possibly hanging al https://bugs.python.org/issue33021 opened by nirs #33023: Unable to copy ssl.SSLContext https://bugs.python.org/issue33023 opened by vitaly.krug #33024: asyncio.WriteTransport.set_write_buffer_limits orders its args https://bugs.python.org/issue33024 opened by vitaly.krug #33025: urlencode produces bad output from ssl.CERT_NONE and friends t https://bugs.python.org/issue33025 opened by vitaly.krug #33026: Fix jumping out of "with" block https://bugs.python.org/issue33026 opened by serhiy.storchaka #33027: handling filename encoding in Content-Disposition by cgi.Field https://bugs.python.org/issue33027 opened by pawciobiel #33028: tempfile.TemporaryDirectory incorrectly documented https://bugs.python.org/issue33028 opened by Richard Neumann #33029: Invalid function cast warnings with gcc 8 for getter and sette https://bugs.python.org/issue33029 opened by siddhesh #33030: GetLastError() may be overwritten by Py_END_ALLOW_THREADS https://bugs.python.org/issue33030 opened by steve.dower #33031: Questionable code in OrderedDict definition https://bugs.python.org/issue33031 opened by serhiy.storchaka #33032: Mention implicit cache in struct.Struct docs https://bugs.python.org/issue33032 opened by ncoghlan #33033: Clarify that the signed number convertors to PyArg_ParseTuple. https://bugs.python.org/issue33033 opened by Antony.Lee #33034: urllib.parse.urlparse and urlsplit not raising ValueError for https://bugs.python.org/issue33034 opened by jonathan-lp #33036: test_selectors.PollSelectorTestCase failing on macOS 10.13.3 https://bugs.python.org/issue33036 opened by n8henrie Most recent 15 issues with no replies (15) ========================================== #33031: Questionable code in OrderedDict definition https://bugs.python.org/issue33031 #33029: Invalid function cast warnings with gcc 8 for getter and sette https://bugs.python.org/issue33029 #33028: tempfile.TemporaryDirectory incorrectly documented https://bugs.python.org/issue33028 #33027: handling filename encoding in Content-Disposition by cgi.Field https://bugs.python.org/issue33027 #33025: urlencode produces bad output from ssl.CERT_NONE and friends t https://bugs.python.org/issue33025 #33017: Special set-cookie setting will bypass Cookielib https://bugs.python.org/issue33017 #33015: Fix function cast warning in thread_pthread.h https://bugs.python.org/issue33015 #33008: urllib.request.parse_http_list incorrectly strips backslashes https://bugs.python.org/issue33008 #33007: Objects referencing private-mangled names do not roundtrip pro https://bugs.python.org/issue33007 #33006: docstring of filter function is incorrect https://bugs.python.org/issue33006 #33003: urllib: Document parse_http_list https://bugs.python.org/issue33003 #32996: Improve What's New in 3.7 https://bugs.python.org/issue32996 #32995: Add a glossary entry for context variables https://bugs.python.org/issue32995 #32987: tokenize.py parses unicode identifiers incorrectly https://bugs.python.org/issue32987 #32985: subprocess.Popen: Confusing documentation for restore_signals https://bugs.python.org/issue32985 Most recent 15 issues waiting for review (15) ============================================= #33027: handling filename encoding in Content-Disposition by cgi.Field https://bugs.python.org/issue33027 #33026: Fix jumping out of "with" block https://bugs.python.org/issue33026 #33021: Some fstat() calls do not release the GIL, possibly hanging al https://bugs.python.org/issue33021 #33016: nt._getfinalpathname may use uninitialized memory https://bugs.python.org/issue33016 #33015: Fix function cast warning in thread_pthread.h https://bugs.python.org/issue33015 #33012: Invalid function cast warnings with gcc 8 for METH_NOARGS https://bugs.python.org/issue33012 #33006: docstring of filter function is incorrect https://bugs.python.org/issue33006 #33001: Buffer overflow vulnerability in os.symlink on Windows (CVE-20 https://bugs.python.org/issue33001 #32996: Improve What's New in 3.7 https://bugs.python.org/issue32996 #32989: IDLE: Fix pyparse.find_good_parse_start and its bad editor cal https://bugs.python.org/issue32989 #32986: multiprocessing, default assumption of Pool size unhelpful https://bugs.python.org/issue32986 #32981: Catastrophic backtracking in poplib (CVE-2018-1060) and diffli https://bugs.python.org/issue32981 #32978: Issues with reading large float values in AIFC files https://bugs.python.org/issue32978 #32970: Improve disassembly of the MAKE_FUNCTION instruction https://bugs.python.org/issue32970 #32968: Fraction modulo infinity should behave consistently with other https://bugs.python.org/issue32968 Top 10 most discussed issues (10) ================================= #32972: unittest.TestCase coroutine support https://bugs.python.org/issue32972 18 msgs #33018: Improve issubclass() error checking and message https://bugs.python.org/issue33018 13 msgs #32986: multiprocessing, default assumption of Pool size unhelpful https://bugs.python.org/issue32986 11 msgs #33001: Buffer overflow vulnerability in os.symlink on Windows (CVE-20 https://bugs.python.org/issue33001 10 msgs #33016: nt._getfinalpathname may use uninitialized memory https://bugs.python.org/issue33016 9 msgs #32978: Issues with reading large float values in AIFC files https://bugs.python.org/issue32978 6 msgs #32989: IDLE: Fix pyparse.find_good_parse_start and its bad editor cal https://bugs.python.org/issue32989 6 msgs #33030: GetLastError() may be overwritten by Py_END_ALLOW_THREADS https://bugs.python.org/issue33030 6 msgs #29708: support reproducible Python builds https://bugs.python.org/issue29708 5 msgs #33000: IDLE Doc: Text consumes unlimited RAM, consoles likely not https://bugs.python.org/issue33000 5 msgs Issues closed (27) ================== #4173: PDF documentation: long verbatim lines are cut off at right ha https://bugs.python.org/issue4173 closed by csabella #22822: IPv6Network constructor docs incorrect about valid input https://bugs.python.org/issue22822 closed by xiang.zhang #23159: argparse: Provide equivalent of optparse.OptionParser.{option_ https://bugs.python.org/issue23159 closed by emcd #25197: Allow documentation switcher to change url to /3/ and /dev/ https://bugs.python.org/issue25197 closed by Mariatta #29417: Sort entries in foo.dist-info/RECORD https://bugs.python.org/issue29417 closed by eric.araujo #30147: Change in re.escape output is not documented in 3.7 whatsnew https://bugs.python.org/issue30147 closed by ned.deily #30353: ctypes: pass by value for structs broken on Cygwin/MinGW 64-bi https://bugs.python.org/issue30353 closed by ned.deily #32854: Add ** Map Unpacking Support for namedtuple https://bugs.python.org/issue32854 closed by serhiy.storchaka #32874: IDLE: Add tests for pyparse https://bugs.python.org/issue32874 closed by terry.reedy #32963: Python 2.7 tutorial claims source code is UTF-8 encoded https://bugs.python.org/issue32963 closed by brett.cannon #32964: Reuse a testing implementation of the path protocol in tests https://bugs.python.org/issue32964 closed by serhiy.storchaka #32969: Add more constants to zlib module https://bugs.python.org/issue32969 closed by xiang.zhang #32984: IDLE: set and unset __file__ for startup files https://bugs.python.org/issue32984 closed by terry.reedy #32988: datetime.datetime.strftime('%s') always uses local timezone, e https://bugs.python.org/issue32988 closed by adamwill #32991: AttributeError in doctest.DocTestFinder.find https://bugs.python.org/issue32991 closed by jason.coombs #32992: unittest: Automatically run coroutines in a loop https://bugs.python.org/issue32992 closed by yselivanov #32994: Building the html documentation is broken https://bugs.python.org/issue32994 closed by ned.deily #32997: Catastrophic backtracking in fpformat https://bugs.python.org/issue32997 closed by benjamin.peterson #32998: regular expression regression in python 3.7 https://bugs.python.org/issue32998 closed by serhiy.storchaka #32999: issubclass(obj, abc.ABC) causes a segfault https://bugs.python.org/issue32999 closed by inada.naoki #33004: Shutil module functions could accept Path-like objects https://bugs.python.org/issue33004 closed by rougeth #33005: 3.7.0b2 Interpreter crash in dev mode (or with PYTHONMALLOC=de https://bugs.python.org/issue33005 closed by vstinner #33009: Assertion failure in inspect.signature on unbound partialmetho https://bugs.python.org/issue33009 closed by yselivanov #33011: Embedded 3.6.4 distribution does not add script parent as sys. https://bugs.python.org/issue33011 closed by steve.dower #33013: Underscore in str.format with x option https://bugs.python.org/issue33013 closed by serhiy.storchaka #33022: Floating Point Arithmetic Inconsistency (internal off-by-one) https://bugs.python.org/issue33022 closed by tim.peters #33035: Some examples in documentation section 4.7.2 are incorrect https://bugs.python.org/issue33035 closed by ebarry

1 0

Reminder: 3.6.5rc1 cutoff coming up
by Ned Deily March 8, 2018

March 8, 2018

A quick reminder that it's time for our next quarterly maintenance release of Python 3.6. The cutoff for 3.6.5rc1 is planned for 2018-03-12 end-of-the-day AOE. Please get any bug fixes and doc changes in before then. Expect that any changes merged after the 3.6.5rc1 cutoff will be released in 3.6.6 which is currently scheduled for 2018-06 (along with 3.7.0). Also, a reminder that 3.6.x has been out in the field for nearly 15 months now and thanks to all of your hard work in previous feature releases and during the 3.6 development phase, the 3.6 release series has seen remarkably quick adoption to overall great acclaim. Now that 3.6 has reached a certain level of maturity, it is important for all of us to continue to focus on stability for all of its downstream users. A key assumption of our maintenance strategy for years has been that we as a project will only maintain the most recent bugfix (or security) release. In other words, when we release x.y.z, we immediately drop support for x.y.z-1. To do that, we implicitly promise to users that they can "painlessly" upgrade from any x.y.n to x.y.z where n < z. To try to keep that promise, we strive to make no incompatible changes in x.y.z without *really* good reasons. I think it is important as 3.6 moves along in its lifecycle to put ourselves in the shoes of our users and ask ourselves if a change is really appropriate at this stage. There's no hard and fast rule here, just continue to use your best judgement. When in doubt, ask! FYI, I've adjusted the 3.6.x release schedule to allow for 2 additional quarterly maintenance releases after 3.7.0 releases instead of just one. That means the final bugfix release for the 3.6 series is planned to be 3.6.8 in 2018-12, 6 months after 3.7.0 releases and 2 years after 3.6.0 first released. Thereafter, only security issues will be accepted and addressed for the remaining life of 3.6. Thanks again! --Ned https://www.python.org/dev/peps/pep-0494/ -- Ned Deily nad(a)python.org -- []

1 0

Backward incompatible change about docstring AST
by INADA Naoki March 7, 2018

March 7, 2018

Hi, all. There is design discussion which is deferred blocker of 3.7. https://bugs.python.org/issue32911 ## Background An year ago, I moved docstring in AST from statements list to field of module, class and functions. https://bugs.python.org/issue29463 Without this change, AST-level constant folding was complicated because "foo" can be docstring but "fo" + "o" can't be docstring. This simplified some other edge cases. For example, future import must be on top of the module, but docstring can be before it. Docstring is very special than other expressions/statement. Of course, this change was backward incompatible. Tools reading/writing docstring via AST will be broken by this change. For example, it broke PyFlakes, and PyFlakes solved it already. https://github.com/PyCQA/pyflakes/pull/273 Since AST doesn't guarantee backward compatibility, we can change AST if it's reasonable. Last week, Mark Shannon reported issue about this backward incompatibility. As he said, this change losted lineno and column of docstring from AST. https://bugs.python.org/issue32911#msg312567 ## Design discussion And as he said, there are three options: https://bugs.python.org/issue32911#msg312625 > It seems to be that there are three reasonable choices: > 1. Revert to 3.6 behaviour, with the addition of `docstring` attribute. > 2. Change the docstring attribute to an AST node, possibly by modifying the grammar. > 3. Do nothing. 1 is backward compatible about reading docstring. But when writing, it's not DRY or SSOT. There are two source of docstring. For example: `ast.Module([ast.Str("spam")], docstring="egg")` 2 is considerable. I tried to implement this idea by adding `DocString` statement AST. https://github.com/python/cpython/pull/5927/files While it seems large change, most changes are reverting the AST changes. So it's more closer to 3.6 codebase. (especially, test_ast is very close to 3.6) In this PR, `ast.Module([ast.Str("spam")])` doesn't have docstring for simplicity. So it's backward incompatible for both of reading and writing docstring too. But it keeps lineno and column of docstring in AST. 3 is most conservative because 3.7b2 was cut now and there are some tools supporting 3.7 already. I prefer 2 or 3. If we took 3, I don't want to do 2 in 3.8. One backward incompatible change is better than two. Any thoughts? -- INADA Naoki <songofacandy(a)gmail.com>

6 7

Re: [Python-Dev] Fix strncpy warning with gcc 8 (#5840)
by Serhiy Storchaka March 6, 2018

March 6, 2018

06.03.18 12:34, Xiang Zhang пише: > https://github.com/python/cpython/commit/efd2bac1564f8141a4eab1bf8779b41297… > commit: efd2bac1564f8141a4eab1bf8779b412974b8d69 > branch: master > author: Siddhesh Poyarekar <siddhesh.poyarekar(a)gmail.com> > committer: Xiang Zhang <angwerzx(a)126.com> > date: 2018-03-06T18:34:35+08:00 > summary: > > Fix strncpy warning with gcc 8 (#5840) > > The length in strncpy is one char too short and as a result it leads > to a build warning with gcc 8. Comment out the strncpy since the > interpreter aborts immediately after anyway. > > files: > M Python/pystrtod.c > > diff --git a/Python/pystrtod.c b/Python/pystrtod.c > index 9bf936386210..601f7c691edf 100644 > --- a/Python/pystrtod.c > +++ b/Python/pystrtod.c > @@ -1060,8 +1060,8 @@ format_float_short(double d, char format_code, > else { > /* shouldn't get here: Gay's code should always return > something starting with a digit, an 'I', or 'N' */ > - strncpy(p, "ERR", 3); > - /* p += 3; */ > + /* strncpy(p, "ERR", 3); > + p += 3; */ > Py_UNREACHABLE(); > } > goto exit; > I think this code was added for purpose. In the case of programming error we could get meaningful value in post-mortal debugging. But after replacing assert(0) with Py_UNREACHABLE this perhaps lost a sense. If this code is no longer needed it is better to remove it than keeping an obscure comment. What are your thoughts @warsaw and @ericvsmith? Py_UNREACHABLE was added in issue31338 by Barry. The original code was added in issue1580 by Eric Smith (maybe it was copied from other place).

2 1

Any way to only receive emails for threads that I am participating in?
by Elias Zamaria March 6, 2018

March 6, 2018

I am trying to participate in the discussion about PEP 467, but I'm still kind of getting used to the mailing list. It seems like I can either subscribe and get emails for all of the threads, or unsubscribe and not get any emails, making me unable to reply to the threads I want to reply to. The batched daily digest feature makes the emails more tolerable, but ideally, I would like to only get emails for a few specific subjects I care a lot about. I can probably set up some archiving or filtering on my end, but I am wondering if anyone has a way to only subscribe to certain threads, or any general suggestions for dealing with the mailing list. Also, I was unsubscribed for a while, when someone sent a message in the PEP 467 thread. Is there a way to reply to messages that were sent when I was not subscribed?

5 6

Issue 32933
by anthony.flury＠btinternet.com March 5, 2018

March 5, 2018

I mentioned when I raised issue 32933 (mock_open doesn't support dunder iter protocol) that I have a one line fix for the issue. Who should I send this detail too ? Obviously it will need test cases too - I wrote a single very simple one just to prove to myself it worked - but it isn't complete by any stretch of the imagination. -- Anthony Flury anthony.flury(a)btinternet.com

4 4

Summary of Python tracker Issues
by Python tracker March 2, 2018

March 2, 2018

ACTIVITY SUMMARY (2018-02-23 - 2018-03-02) 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 6491 ( +6) closed 38243 (+53) total 44734 (+59) Open issues with patches: 2527 Issues opened (49) ================== #32604: Expose the subinterpreters C-API in Python for testing use. https://bugs.python.org/issue32604 reopened by eric.snow #32924: Python 3.7 docs in docs.p.o points to GitHub's master branch https://bugs.python.org/issue32924 reopened by ned.deily #32925: AST optimizer: Change a list into tuple in iterations and cont https://bugs.python.org/issue32925 opened by serhiy.storchaka #32926: Add public TestCase method/property to get result of current t https://bugs.python.org/issue32926 opened by Victor Engmark #32927: Add typeshed documentation for unittest.TestCase._feedErrorsTo https://bugs.python.org/issue32927 opened by Victor Engmark #32932: better error message when __all__ contains non-str objects https://bugs.python.org/issue32932 opened by xiang.zhang #32933: mock_open does not support iteration around text files. https://bugs.python.org/issue32933 opened by anthony-flury #32934: logging.handlers.BufferingHandler capacity is unclearly specif https://bugs.python.org/issue32934 opened by enrico #32935: Documentation falsely leads to believe that MemoryHandler can https://bugs.python.org/issue32935 opened by enrico #32936: RobotFileParser.parse() should raise an exception when the rob https://bugs.python.org/issue32936 opened by Guinness #32937: Multiprocessing worker functions not terminating with a large https://bugs.python.org/issue32937 opened by Ericg #32938: webbrowser: Add options for private mode https://bugs.python.org/issue32938 opened by csabella #32939: IDLE: self.use_context_ps1 defined in editor, but always False https://bugs.python.org/issue32939 opened by csabella #32940: IDLE: pyparse - simplify StringTranslatePseudoMapping https://bugs.python.org/issue32940 opened by csabella #32941: mmap should expose madvise() https://bugs.python.org/issue32941 opened by pitrou #32942: Regression: test_script_helper fails https://bugs.python.org/issue32942 opened by abrezovsky #32943: confusing error message for rot13 codec https://bugs.python.org/issue32943 opened by xiang.zhang #32946: Speed up import from non-packages https://bugs.python.org/issue32946 opened by serhiy.storchaka #32947: Support OpenSSL 1.1.1 https://bugs.python.org/issue32947 opened by christian.heimes #32948: clang compiler warnings on Travis https://bugs.python.org/issue32948 opened by christian.heimes #32949: Simplify "with"-related opcodes https://bugs.python.org/issue32949 opened by serhiy.storchaka #32950: profiling python gc https://bugs.python.org/issue32950 opened by Luavis #32951: Prohibit direct instantiation of SSLSocket and SSLObject https://bugs.python.org/issue32951 opened by christian.heimes #32952: Add __qualname__ for attributes of Mock instances https://bugs.python.org/issue32952 opened by s_kostyuk #32953: Dataclasses: frozen should not be inherited for non-dataclass https://bugs.python.org/issue32953 opened by eric.smith #32954: Lazy Literal String Interpolation (PEP-498-based fl-strings) https://bugs.python.org/issue32954 opened by arcivanov #32955: IDLE crashes when trying to save a file https://bugs.python.org/issue32955 opened by zaphod424 #32957: distutils.command.install checks truthiness of .ext_modules in https://bugs.python.org/issue32957 opened by korijn #32958: Urllib proxy_bypass crashes for urls containing long basic aut https://bugs.python.org/issue32958 opened by ablack #32959: zipimport fails when the ZIP archive contains more than 65535 https://bugs.python.org/issue32959 opened by mchouza #32960: dataclasses: disallow inheritance between frozen and non-froze https://bugs.python.org/issue32960 opened by eric.smith #32962: test_gdb fails in debug build with `-mcet -fcf-protection -O0` https://bugs.python.org/issue32962 opened by ishcherb #32963: Python 2.7 tutorial claims source code is UTF-8 encoded https://bugs.python.org/issue32963 opened by mjpieters #32964: Reuse a testing implementation of the path protocol in tests https://bugs.python.org/issue32964 opened by serhiy.storchaka #32966: Python 3.6.4 - 0x80070643 - Fatal Error during installation https://bugs.python.org/issue32966 opened by exceltw #32968: Fraction modulo infinity should behave consistently with other https://bugs.python.org/issue32968 opened by elias #32969: Add more constants to zlib module https://bugs.python.org/issue32969 opened by xiang.zhang #32970: Improve disassembly of the MAKE_FUNCTION instruction https://bugs.python.org/issue32970 opened by serhiy.storchaka #32971: Docs on unittest.TestCase.assertRaises() should clarify contex https://bugs.python.org/issue32971 opened by nodakai #32972: unittest.TestCase coroutine support https://bugs.python.org/issue32972 opened by pdxjohnny #32973: Importing the same extension module under multiple names break https://bugs.python.org/issue32973 opened by twouters #32974: Add bitwise operations and other missing comparison methods to https://bugs.python.org/issue32974 opened by Kyle Agronick #32975: mailbox: It would be nice to move mailbox.Message from legacy https://bugs.python.org/issue32975 opened by maxking #32976: linux/random.h present but cannot be compiled https://bugs.python.org/issue32976 opened by mfschmidt #32977: added acts_like decorator to dataclasses module https://bugs.python.org/issue32977 opened by ninjaaron #32978: Issues with reading large float values in AIFC files https://bugs.python.org/issue32978 opened by serhiy.storchaka #32981: Catastrophic backtracking in poplib and difflib https://bugs.python.org/issue32981 opened by davisjam #32982: Parse out invisible Unicode characters? https://bugs.python.org/issue32982 opened by leewz #32983: UnicodeDecodeError 'ascii' codec can't decode byte in position https://bugs.python.org/issue32983 opened by Jiri Prajzner Most recent 15 issues with no replies (15) ========================================== #32982: Parse out invisible Unicode characters? https://bugs.python.org/issue32982 #32981: Catastrophic backtracking in poplib and difflib https://bugs.python.org/issue32981 #32976: linux/random.h present but cannot be compiled https://bugs.python.org/issue32976 #32974: Add bitwise operations and other missing comparison methods to https://bugs.python.org/issue32974 #32971: Docs on unittest.TestCase.assertRaises() should clarify contex https://bugs.python.org/issue32971 #32970: Improve disassembly of the MAKE_FUNCTION instruction https://bugs.python.org/issue32970 #32969: Add more constants to zlib module https://bugs.python.org/issue32969 #32962: test_gdb fails in debug build with `-mcet -fcf-protection -O0` https://bugs.python.org/issue32962 #32958: Urllib proxy_bypass crashes for urls containing long basic aut https://bugs.python.org/issue32958 #32957: distutils.command.install checks truthiness of .ext_modules in https://bugs.python.org/issue32957 #32952: Add __qualname__ for attributes of Mock instances https://bugs.python.org/issue32952 #32950: profiling python gc https://bugs.python.org/issue32950 #32948: clang compiler warnings on Travis https://bugs.python.org/issue32948 #32946: Speed up import from non-packages https://bugs.python.org/issue32946 #32943: confusing error message for rot13 codec https://bugs.python.org/issue32943 Most recent 15 issues waiting for review (15) ============================================= #32978: Issues with reading large float values in AIFC files https://bugs.python.org/issue32978 #32970: Improve disassembly of the MAKE_FUNCTION instruction https://bugs.python.org/issue32970 #32968: Fraction modulo infinity should behave consistently with other https://bugs.python.org/issue32968 #32964: Reuse a testing implementation of the path protocol in tests https://bugs.python.org/issue32964 #32960: dataclasses: disallow inheritance between frozen and non-froze https://bugs.python.org/issue32960 #32957: distutils.command.install checks truthiness of .ext_modules in https://bugs.python.org/issue32957 #32951: Prohibit direct instantiation of SSLSocket and SSLObject https://bugs.python.org/issue32951 #32949: Simplify "with"-related opcodes https://bugs.python.org/issue32949 #32947: Support OpenSSL 1.1.1 https://bugs.python.org/issue32947 #32946: Speed up import from non-packages https://bugs.python.org/issue32946 #32943: confusing error message for rot13 codec https://bugs.python.org/issue32943 #32940: IDLE: pyparse - simplify StringTranslatePseudoMapping https://bugs.python.org/issue32940 #32932: better error message when __all__ contains non-str objects https://bugs.python.org/issue32932 #32925: AST optimizer: Change a list into tuple in iterations and cont https://bugs.python.org/issue32925 #32924: Python 3.7 docs in docs.p.o points to GitHub's master branch https://bugs.python.org/issue32924 Top 10 most discussed issues (10) ================================= #32940: IDLE: pyparse - simplify StringTranslatePseudoMapping https://bugs.python.org/issue32940 14 msgs #32932: better error message when __all__ contains non-str objects https://bugs.python.org/issue32932 11 msgs #17288: cannot jump from a 'return' or 'exception' trace event https://bugs.python.org/issue17288 9 msgs #32056: Improve exceptions in aifc, sunau and wave https://bugs.python.org/issue32056 9 msgs #32968: Fraction modulo infinity should behave consistently with other https://bugs.python.org/issue32968 9 msgs #31961: subprocess._execute_child doesn't accept a single PathLike arg https://bugs.python.org/issue31961 8 msgs #32880: IDLE: Fix and update and cleanup pyparse https://bugs.python.org/issue32880 8 msgs #32954: Lazy Literal String Interpolation (PEP-498-based fl-strings) https://bugs.python.org/issue32954 8 msgs #32911: Doc strings no longer stored in body of AST https://bugs.python.org/issue32911 7 msgs #32604: Expose the subinterpreters C-API in Python for testing use. https://bugs.python.org/issue32604 6 msgs Issues closed (49) ================== #10507: Check well-formedness of reST markup within "make patchcheck" https://bugs.python.org/issue10507 closed by Mariatta #13897: Move fields relevant to sys.exc_info out of frame into generat https://bugs.python.org/issue13897 closed by serhiy.storchaka #15663: Investigate providing Tcl/Tk 8.6 with OS X installers https://bugs.python.org/issue15663 closed by ned.deily #15873: datetime: add ability to parse RFC 3339 dates and times https://bugs.python.org/issue15873 closed by belopolsky #17232: Improve -O docs https://bugs.python.org/issue17232 closed by terry.reedy #17611: Move unwinding of stack for "pseudo exceptions" from interpret https://bugs.python.org/issue17611 closed by serhiy.storchaka #18293: ssl.wrap_socket (cert_reqs=...), getpeercert, and unvalidated https://bugs.python.org/issue18293 closed by christian.heimes #18855: Inconsistent README filenames https://bugs.python.org/issue18855 closed by Mariatta #21541: Provide configure option --with-ssl for compilation with custo https://bugs.python.org/issue21541 closed by christian.heimes #24334: SSLSocket extra level of indirection https://bugs.python.org/issue24334 closed by christian.heimes #25059: Mistake in input-output tutorial regarding print() seperator https://bugs.python.org/issue25059 closed by Mariatta #25115: SSL_set_verify_depth not exposed by the ssl module https://bugs.python.org/issue25115 closed by christian.heimes #25404: ssl.SSLcontext.load_dh_params() does not handle unicode filena https://bugs.python.org/issue25404 closed by christian.heimes #27876: Add SSLContext.set_version_range(minver, maxver=None) https://bugs.python.org/issue27876 closed by christian.heimes #28414: SSL match_hostname fails for internationalized domain names https://bugs.python.org/issue28414 closed by njs #29237: Create enum for pstats sorting options https://bugs.python.org/issue29237 closed by ethan.furman #29480: Mac OSX Installer SSL Roots https://bugs.python.org/issue29480 closed by ned.deily #30607: Extract documentation theme into a separate package https://bugs.python.org/issue30607 closed by ned.deily #31013: gcc7 throws warning when pymem.h development header is used https://bugs.python.org/issue31013 closed by ned.deily #31399: Let OpenSSL verify hostname and IP address https://bugs.python.org/issue31399 closed by christian.heimes #31518: ftplib, urllib2, poplib, httplib, urllib2_localnet use ssl.PRO https://bugs.python.org/issue31518 closed by christian.heimes #31997: SSL lib does not handle trailing dot (period) in hostname or c https://bugs.python.org/issue31997 closed by christian.heimes #32185: SSLContext.wrap_socket sends SNI Extension when server_hostnam https://bugs.python.org/issue32185 closed by christian.heimes #32304: Upload failed (400): Digests do not match on .tar.gz ending wi https://bugs.python.org/issue32304 closed by eric.araujo #32378: test_npn_protocols broken with LibreSSL 2.6.1+ https://bugs.python.org/issue32378 closed by christian.heimes #32394: socket lib beahavior change in 3.6.4 https://bugs.python.org/issue32394 closed by steve.dower #32500: PySequence_Length() raises TypeError on dict type https://bugs.python.org/issue32500 closed by Mariatta #32609: Add setter and getter for min/max protocol version https://bugs.python.org/issue32609 closed by christian.heimes #32647: Undefined references when compiling ctypes on binutils 2.29.1 https://bugs.python.org/issue32647 closed by cstratak #32732: LoggingAdapter ignores extra kwargs of Logger#log() https://bugs.python.org/issue32732 closed by vinay.sajip #32819: match_hostname() error reporting bug https://bugs.python.org/issue32819 closed by christian.heimes #32875: Add __exit__() method to event loops https://bugs.python.org/issue32875 closed by terry.reedy #32877: Login to bugs.python.org with Google account NOT working https://bugs.python.org/issue32877 closed by terry.reedy #32901: Update 3.7 and 3.8 Windows and macOS installer builds to tcl/t https://bugs.python.org/issue32901 closed by ned.deily #32903: os.chdir() may leak memory on Windows https://bugs.python.org/issue32903 closed by xiang.zhang #32916: IDLE: change 'str' to 'code' in idlelib.pyparse.PyParse and us https://bugs.python.org/issue32916 closed by terry.reedy #32923: Typo in documentation of unittest: whilst instead of while https://bugs.python.org/issue32923 closed by Mariatta #32928: _findvs failing on Windows 10 (Release build only) https://bugs.python.org/issue32928 closed by WildCard65 #32929: Change dataclasses hashing to use unsafe_hash boolean (default https://bugs.python.org/issue32929 closed by eric.smith #32930: [help][webbrowser always opens new tab. I want to open in the https://bugs.python.org/issue32930 closed by csabella #32931: Python 3.70b1 specifies non-existent compiler gcc++ https://bugs.python.org/issue32931 closed by ned.deily #32944: Need Guidance on Solving the Tcl problem https://bugs.python.org/issue32944 closed by terry.reedy #32945: sorted(generator) is slower than sorted(list-comprehension) https://bugs.python.org/issue32945 closed by rhettinger #32956: python 3 round bug https://bugs.python.org/issue32956 closed by serhiy.storchaka #32961: namedtuple displaying the internal code https://bugs.python.org/issue32961 closed by eric.smith #32965: Passing a bool to io.open() should raise a TypeError, not read https://bugs.python.org/issue32965 closed by ned.deily #32967: make check in devguide failing https://bugs.python.org/issue32967 closed by Mariatta #32979: dict get() function equivalent for lists. https://bugs.python.org/issue32979 closed by rhettinger #32980: Remove functions that do nothing in _Py_InitializeCore() https://bugs.python.org/issue32980 closed by ncoghlan

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Python Challenge Online - 30 Questions
by Julien Carlier March 1, 2018

March 1, 2018

Hello, Cisco & Dimension Data organize a Python Challenge on EDITx. It is a good way to test your skills & have fun. -> https://editx.eu/it-challenge/python-challenge-2018-cisco-and-dimension-data Rules are simple: 15 minutes online, 30 questions & 3 jokers. Everyone is allowed to participate but only belgian residents can win the prizes. Do not hesitate to share it with people that might be interested. Feedbacks are welcome :) Regards, Julien -- Frankenstraat - Rue des Francs 79 1000 Brussels

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Should the dataclass frozen property apply to subclasses?
by Raymond Hettinger March 1, 2018

March 1, 2018

When working on the docs for dataclasses, something unexpected came up. If a dataclass is specified to be frozen, that characteristic is inherited by subclasses which prevents them from assigning additional attributes: >>> @dataclass(frozen=True) class D: x: int = 10 >>> class S(D): pass >>> s = S() >>> s.cached = True Traceback (most recent call last): File "<pyshell#49>", line 1, in <module> s.cached = True File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/dataclasses.py", line 448, in _frozen_setattr raise FrozenInstanceError(f'cannot assign to field {name!r}') dataclasses.FrozenInstanceError: cannot assign to field 'cached' Other immutable classes in Python don't behave the same way: >>> class T(tuple): pass >>> t = T([10, 20, 30]) >>> t.cached = True >>> class F(frozenset): pass >>> f = F([10, 20, 30]) >>> f.cached = True >>> class B(bytes): pass >>> b = B() >>> b.cached = True Raymond

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PEP 467 (Minor API improvements for binary sequences) - any thoughts?
by Elias Zamaria March 1, 2018

March 1, 2018

This is about some minor changes to the bytes, bytearray, and memoryview classes. Here is the PEP: https://www.python.org/dev/peps/pep-0467/ The page in the bug tracker can be seen at https://bugs.python.org/issue27923 and the pull request can be seen at https://github.com/python/cpython/pull/3237. I am waiting for this to be merged, or approved, or whatever is the next step. Someone on the bug tracker mentioned restarting the discussion on the mailing list, so that is what I'm trying to do here. Does anyone have any thoughts?

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