Mailman 3 December 2013 - Python-Dev

(#19562) Asserts in Python stdlib code (datetime.py)
by Terry Reedy Dec. 13, 2013

Dec. 13, 2013

http://bugs.python.org/issue19562 propose to change the first assert in Lib/datetime.py assert 1 <= month <= 12, month to assert 1 <= month <= 12,'month must be in 1..12' to match the next two asserts out of the *53* in the file. I think that is the wrong direction of change, but that is not my question here. Should stdlib code use assert at all? If user input can trigger an assert, then the code should raise a normal exception that will not disappear with -OO. If the assert is testing program logic, then it seems that the test belongs in the test file, in this case, test/test_datetime.py. For example, consider the following (backwards) code. _DI4Y = _days_before_year(5) # A 4-year cycle has an extra leap day over what we'd get from pasting # together 4 single years. assert _DI4Y == 4 * 365 + 1 To me, the constant should be directly set to its known value. _DI4Y = 4*365 + 1. The function should then be tested in test_datetime. self.assertEqual(dt._days_before_year(5), dt._DI4Y) Is there any policy on use of assert in stdlib production code? -- Terry Jan Reedy

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How do we feel about using pragmas and __attribute__ in C code?
by Brett Cannon Dec. 13, 2013

Dec. 13, 2013

http://bugs.python.org/issue12837 deals with the single compiler warning left on OS X: a tautalogical compare in socketmodule.c that is valid under POSIX. I have a solution that uses pragmas to turn off tautological compare warnings for the single 'if' statement that triggers it. But there are very few places in Python's code base which use pragmas and I have never seen a discussion if we are okay with their overall use. So is there any reason to not use pragmas sparsely in the code? Tying into this and using compiler-specific things in C code, what about __attribute__? http://bugs.python.org/issue19298 proposes an idea that Daniel Stutzbach originally came up with where we could use __atribute__ (behind a nicer macro) to help detect refleaks on PyObject* stack variables. Would __attribute__ usage be okay in that situation?

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Summary of Python tracker Issues
by Python tracker Dec. 13, 2013

Dec. 13, 2013

ACTIVITY SUMMARY (2013-12-06 - 2013-12-13) 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 4322 ( -1) closed 27428 (+69) total 31750 (+68) Open issues with patches: 1979 Issues opened (48) ================== #16669: Docstrings for namedtuple http://bugs.python.org/issue16669 reopened by serhiy.storchaka #19911: ntpath.splitdrive() fails when UNC part contains \u0130 http://bugs.python.org/issue19911 opened by serhiy.storchaka #19912: ntpath.splitunc() is broken and not tested http://bugs.python.org/issue19912 opened by serhiy.storchaka #19913: TR/Crypt.XPACK.Gen-4 in easy_install.exe http://bugs.python.org/issue19913 opened by christian.heimes #19914: help([object]) returns "Not enough memory." on standard Python http://bugs.python.org/issue19914 opened by hct #19915: int.bit_at(n) - Accessing a single bit in O(1) http://bugs.python.org/issue19915 opened by anon #19917: [httplib] logging information for request is not pretty printe http://bugs.python.org/issue19917 opened by mcepl #19918: PureWindowsPath.relative_to() is not case insensitive http://bugs.python.org/issue19918 opened by serhiy.storchaka #19919: SSL: test_connect_ex_error fails with EWOULDBLOCK http://bugs.python.org/issue19919 opened by christian.heimes #19920: TarFile.list() fails on some files http://bugs.python.org/issue19920 opened by serhiy.storchaka #19921: Path.mkdir(0, True) always fails http://bugs.python.org/issue19921 opened by serhiy.storchaka #19923: OSError: [Errno 512] Unknown error 512 in test_multiprocessing http://bugs.python.org/issue19923 opened by pitrou #19925: Add unit test for spwd module http://bugs.python.org/issue19925 opened by vajrasky #19927: Path-based loaders lack a meaningful __eq__() implementation. http://bugs.python.org/issue19927 opened by eric.snow #19930: os.makedirs('dir1/dir2', 0) always fails http://bugs.python.org/issue19930 opened by serhiy.storchaka #19931: namedtuple docstrings are verbose for no added benefit http://bugs.python.org/issue19931 opened by nedbat #19933: Round default argument for "ndigits" http://bugs.python.org/issue19933 opened by JBernardo #19934: collections.Counter.most_common does not document `None` as ac http://bugs.python.org/issue19934 opened by mgilson #19936: Executable permissions of Python source files http://bugs.python.org/issue19936 opened by serhiy.storchaka #19938: Re-enable test_bug_1333982 on 3.x http://bugs.python.org/issue19938 opened by zach.ware #19939: Deprecate portions or all of pkgutil module. http://bugs.python.org/issue19939 opened by eric.snow #19940: ssl.cert_time_to_seconds() returns wrong results if local time http://bugs.python.org/issue19940 opened by akira #19941: python -m imports non-ASCII .py file without encoding declarat http://bugs.python.org/issue19941 opened by jwilk #19942: UTF-8 encoding not enforced http://bugs.python.org/issue19942 opened by jwilk #19944: Make importlib.find_spec load packages as needed http://bugs.python.org/issue19944 opened by ncoghlan #19948: POSIX semantics of PATH search in execvpe is not respected http://bugs.python.org/issue19948 opened by glondu #19949: Explicitly skip or mask skipped/disabled tests in test_xpickle http://bugs.python.org/issue19949 opened by zach.ware #19950: Document that unittest.TestCase.__init__ is called once per te http://bugs.python.org/issue19950 opened by Claudiu.Popa #19953: __iadd__() doc not strictly correct http://bugs.python.org/issue19953 opened by ferno #19954: test_tk floating point exception on my gentoo box running tk 8 http://bugs.python.org/issue19954 opened by r.david.murray #19955: When adding .PY and .PYW to PATHEXT, it replaced string instea http://bugs.python.org/issue19955 opened by nickhil.rokkam #19956: inspect.getsource(obj.foo) fails when foo is an injected metho http://bugs.python.org/issue19956 opened by mtahmed #19959: argparse.FileType does not expand tilde "~" http://bugs.python.org/issue19959 opened by garthy #19960: MacOSX: Building 2.7 without the xcode command line tools ins http://bugs.python.org/issue19960 opened by ronaldoussoren #19961: MacOSX: Tkinter build failure when building without command-li http://bugs.python.org/issue19961 opened by ronaldoussoren #19962: Create a 'python.bat' script to invoke interpreter from source http://bugs.python.org/issue19962 opened by zach.ware #19963: Update docs for importlib.import_module() http://bugs.python.org/issue19963 opened by brett.cannon #19965: Non-atomic generation of Include/Python-ast.h and Python/Pytho http://bugs.python.org/issue19965 opened by Arfrever #19966: Wrong mtimes of files in 3.3.3 tarballs http://bugs.python.org/issue19966 opened by Arfrever #19967: asyncio: remove _TracebackLogger http://bugs.python.org/issue19967 opened by haypo #19968: Using DESTDIR breaks sys.path http://bugs.python.org/issue19968 opened by mishikal #19970: Typo of `immediatly` and `agin` words http://bugs.python.org/issue19970 opened by vajrasky #19972: Leak in pickle (?) http://bugs.python.org/issue19972 opened by skrah #19974: tarfile doesn't overwrite symlink by directory http://bugs.python.org/issue19974 opened by antonymayi #19975: Remove unused imports from webbrowser http://bugs.python.org/issue19975 opened by Claudiu.Popa #19976: Argument Clinic: generate second arg for METH_NOARGS http://bugs.python.org/issue19976 opened by skrah #19977: Use "surrogateescape" error handler for sys.stdin and sys.stdo http://bugs.python.org/issue19977 opened by haypo #19978: Update multiprocessing.spawn to use runpy.run_path http://bugs.python.org/issue19978 opened by brett.cannon Most recent 15 issues with no replies (15) ========================================== #19978: Update multiprocessing.spawn to use runpy.run_path http://bugs.python.org/issue19978 #19975: Remove unused imports from webbrowser http://bugs.python.org/issue19975 #19974: tarfile doesn't overwrite symlink by directory http://bugs.python.org/issue19974 #19970: Typo of `immediatly` and `agin` words http://bugs.python.org/issue19970 #19966: Wrong mtimes of files in 3.3.3 tarballs http://bugs.python.org/issue19966 #19963: Update docs for importlib.import_module() http://bugs.python.org/issue19963 #19962: Create a 'python.bat' script to invoke interpreter from source http://bugs.python.org/issue19962 #19961: MacOSX: Tkinter build failure when building without command-li http://bugs.python.org/issue19961 #19960: MacOSX: Building 2.7 without the xcode command line tools ins http://bugs.python.org/issue19960 #19955: When adding .PY and .PYW to PATHEXT, it replaced string instea http://bugs.python.org/issue19955 #19953: __iadd__() doc not strictly correct http://bugs.python.org/issue19953 #19949: Explicitly skip or mask skipped/disabled tests in test_xpickle http://bugs.python.org/issue19949 #19938: Re-enable test_bug_1333982 on 3.x http://bugs.python.org/issue19938 #19936: Executable permissions of Python source files http://bugs.python.org/issue19936 #19931: namedtuple docstrings are verbose for no added benefit http://bugs.python.org/issue19931 Most recent 15 issues waiting for review (15) ============================================= #19977: Use "surrogateescape" error handler for sys.stdin and sys.stdo http://bugs.python.org/issue19977 #19975: Remove unused imports from webbrowser http://bugs.python.org/issue19975 #19972: Leak in pickle (?) http://bugs.python.org/issue19972 #19970: Typo of `immediatly` and `agin` words http://bugs.python.org/issue19970 #19967: asyncio: remove _TracebackLogger http://bugs.python.org/issue19967 #19965: Non-atomic generation of Include/Python-ast.h and Python/Pytho http://bugs.python.org/issue19965 #19962: Create a 'python.bat' script to invoke interpreter from source http://bugs.python.org/issue19962 #19960: MacOSX: Building 2.7 without the xcode command line tools ins http://bugs.python.org/issue19960 #19959: argparse.FileType does not expand tilde "~" http://bugs.python.org/issue19959 #19950: Document that unittest.TestCase.__init__ is called once per te http://bugs.python.org/issue19950 #19949: Explicitly skip or mask skipped/disabled tests in test_xpickle http://bugs.python.org/issue19949 #19944: Make importlib.find_spec load packages as needed http://bugs.python.org/issue19944 #19938: Re-enable test_bug_1333982 on 3.x http://bugs.python.org/issue19938 #19936: Executable permissions of Python source files http://bugs.python.org/issue19936 #19934: collections.Counter.most_common does not document `None` as ac http://bugs.python.org/issue19934 Top 10 most discussed issues (10) ================================= #19915: int.bit_at(n) - Accessing a single bit in O(1) http://bugs.python.org/issue19915 27 msgs #19933: Round default argument for "ndigits" http://bugs.python.org/issue19933 14 msgs #17576: PyNumber_Index() is not int-subclass friendly (or operator.ind http://bugs.python.org/issue17576 13 msgs #19904: Add 128-bit integer support to struct http://bugs.python.org/issue19904 13 msgs #18983: Specify time unit for timeit CLI http://bugs.python.org/issue18983 12 msgs #18576: Rename and document test.script_helper as test.support.script_ http://bugs.python.org/issue18576 10 msgs #19921: Path.mkdir(0, True) always fails http://bugs.python.org/issue19921 10 msgs #19944: Make importlib.find_spec load packages as needed http://bugs.python.org/issue19944 10 msgs #19965: Non-atomic generation of Include/Python-ast.h and Python/Pytho http://bugs.python.org/issue19965 9 msgs #19976: Argument Clinic: generate second arg for METH_NOARGS http://bugs.python.org/issue19976 9 msgs Issues closed (64) ================== #6784: byte/unicode pickle incompatibilities between python2 and pyth http://bugs.python.org/issue6784 closed by alexandre.vassalotti #9645: PEP 383: os.pathconf() does not accept surrogateescape argumen http://bugs.python.org/issue9645 closed by serhiy.storchaka #14432: Bug in generator if the generator in created in a temporary C http://bugs.python.org/issue14432 closed by haypo #15032: Provide a select.select implemented using select.poll http://bugs.python.org/issue15032 closed by gregory.p.smith #15475: Correct __sizeof__ support for itertools http://bugs.python.org/issue15475 closed by serhiy.storchaka #17200: telnetlib.read_until() timeout uses the wrong units http://bugs.python.org/issue17200 closed by gregory.p.smith #17429: platform.linux_distribution() should decode files from UTF-8, http://bugs.python.org/issue17429 closed by haypo #17786: Crash in test_ctypes.test_callbacks() on AMD64 NetBSD 5.1.2 [S http://bugs.python.org/issue17786 closed by haypo #18270: IDLE on OS X fails with Attribute Error if no initial shell an http://bugs.python.org/issue18270 closed by ned.deily #18430: gzip, bz2, lzma: peek advances file position of existing file http://bugs.python.org/issue18430 closed by python-dev #18746: test_threading.test_finalize_with_trace() fails on FreeBSD bui http://bugs.python.org/issue18746 closed by haypo #19063: Python 3.3.3 encodes emails containing non-ascii data as 7bit http://bugs.python.org/issue19063 closed by r.david.murray #19099: struct.pack fails first time with unicode fmt http://bugs.python.org/issue19099 closed by serhiy.storchaka #19230: Reimplement the keyword module in C http://bugs.python.org/issue19230 closed by haypo #19343: Expose FreeBSD-specific APIs in resource module http://bugs.python.org/issue19343 closed by christian.heimes #19437: More failures found by pyfailmalloc http://bugs.python.org/issue19437 closed by haypo #19481: IDLE hangs while printing instance of Unicode subclass http://bugs.python.org/issue19481 closed by serhiy.storchaka #19506: subprocess.communicate() should use a memoryview http://bugs.python.org/issue19506 closed by gregory.p.smith #19535: Test failures with -OO http://bugs.python.org/issue19535 closed by serhiy.storchaka #19566: ERROR: test_close (test.test_asyncio.test_unix_events.FastChil http://bugs.python.org/issue19566 closed by haypo #19572: Report more silently skipped tests as skipped http://bugs.python.org/issue19572 closed by zach.ware #19576: "Non-Python created threads" documentation doesn't mention PyE http://bugs.python.org/issue19576 closed by python-dev #19635: asyncio should not depend on concurrent.futures, it is not alw http://bugs.python.org/issue19635 closed by haypo #19636: Fix usage of MAX_PATH in posixmodule.c http://bugs.python.org/issue19636 closed by haypo #19661: AIX: Python: RuntimeError "invalid slot offset when importing http://bugs.python.org/issue19661 closed by dellair.jie #19690: test_logging test_race failed with PermissionError http://bugs.python.org/issue19690 closed by vinay.sajip #19712: Make sure there are exec_module tests for _LoaderBasics subcla http://bugs.python.org/issue19712 closed by brett.cannon #19750: test_asyncio.test_unix_events constructor failures on AIX http://bugs.python.org/issue19750 closed by haypo #19758: Warnings in tests http://bugs.python.org/issue19758 closed by serhiy.storchaka #19787: Fix PyThread_set_key_value() strange behaviour http://bugs.python.org/issue19787 closed by python-dev #19828: test_site fails with -S flag http://bugs.python.org/issue19828 closed by zach.ware #19830: test_poplib emits resource warning http://bugs.python.org/issue19830 closed by haypo #19843: Wait for multiple sub-processes to terminate http://bugs.python.org/issue19843 closed by gregory.p.smith #19846: Python 3 raises Unicode errors with the C locale http://bugs.python.org/issue19846 closed by haypo #19851: reload problem with submodule http://bugs.python.org/issue19851 closed by eric.snow #19857: test_imaplib doesn't always reap SocketServer thread http://bugs.python.org/issue19857 closed by neologix #19862: Unclear xpath caching for custom namespaces http://bugs.python.org/issue19862 closed by eric.araujo #19876: selectors (and asyncio?): document behaviour on closed files/s http://bugs.python.org/issue19876 closed by gvanrossum #19880: unittest: on failure, TestCase.run() keeps a reference to the http://bugs.python.org/issue19880 closed by python-dev #19893: Python cApi memory problem. Py_Initialize memory leak http://bugs.python.org/issue19893 closed by rstarostecki #19900: improve pickle intro http://bugs.python.org/issue19900 closed by pitrou #19901: tests fail due to unsupported SO_REUSEPORT when building Pytho http://bugs.python.org/issue19901 closed by gregory.p.smith #19910: Document that compile() source may be bytes http://bugs.python.org/issue19910 closed by python-dev #19916: urllib2 fails on https,SSL broken. http://bugs.python.org/issue19916 closed by r.david.murray #19922: mbstate_t requires _INCLUDE__STDC_A1_SOURCE http://bugs.python.org/issue19922 closed by christian.heimes #19924: test_venv fails with --without-threads http://bugs.python.org/issue19924 closed by ncoghlan #19926: Refactor unit test in abstract numbers test http://bugs.python.org/issue19926 closed by zach.ware #19928: Implement cell repr test http://bugs.python.org/issue19928 closed by serhiy.storchaka #19929: subprocess: increase read buffer size http://bugs.python.org/issue19929 closed by gregory.p.smith #19932: Missing spaces in import.h? http://bugs.python.org/issue19932 closed by brett.cannon #19935: IPv6 urlparse error on python 2.6 http://bugs.python.org/issue19935 closed by christian.heimes #19937: IDLE can't be launched http://bugs.python.org/issue19937 closed by ned.deily #19943: typo: unkown → unknown http://bugs.python.org/issue19943 closed by ezio.melotti #19945: os.path.split starting with two slashes http://bugs.python.org/issue19945 closed by Toilal #19946: Have multiprocessing raise ImportError when spawning a process http://bugs.python.org/issue19946 closed by brett.cannon #19947: Inspect module broken http://bugs.python.org/issue19947 closed by zach.ware #19951: parse_qsl fails on empty query argument without = http://bugs.python.org/issue19951 closed by r.david.murray #19952: asyncio: test_wait_for_handle failure http://bugs.python.org/issue19952 closed by haypo #19957: Minor refactor of Lib/email/encoders.py http://bugs.python.org/issue19957 closed by r.david.murray #19958: Assignment success despite TypeError exception http://bugs.python.org/issue19958 closed by ezio.melotti #19964: '?' is always non-greedy http://bugs.python.org/issue19964 closed by tim.peters #19969: PyBytes_FromFormatV("%c") and PyString_FromFormatV("%c") don't http://bugs.python.org/issue19969 closed by haypo #19971: Remove Tulip words from asyncio documentation/code http://bugs.python.org/issue19971 closed by haypo #19973: Deprecate pyio http://bugs.python.org/issue19973 closed by larry

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Re: [Python-Dev] Committing PEP 3155
by Kingmody Dec. 13, 2013

Dec. 13, 2013

‏‫من جهاز الـ iPad الخاص بي‬

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Re: [Python-Dev] Committing PEP 3155
by Kingmody Dec. 13, 2013

Dec. 13, 2013

‏‫من جهاز الـ iPad الخاص بي‬

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Re: [Python-Dev] Committing PEP 3155
by Kingmody Dec. 13, 2013

Dec. 13, 2013

‏‫من جهاز الـ iPad الخاص بي‬

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[buildbot] Increase number of stored builds
by Stefan Krah Dec. 11, 2013

Dec. 11, 2013

Hello, is it possible to increase the number of stored builds? Sometimes I want to see a build that might be a week or even 6 months old. Examples: 1) Recently I was wondering if the HPUX CFLAGS changed at some point. 2) The HPUX build has the following error: "*** WARNING: renaming "_curses" since importing it failed: dynamic module does not define init function (PyInit__curses)" I need to see if http://hg.python.org/cpython/rev/97fb852c5c26 is responsible. Stefan Krah

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Re: [Python-Dev] One-line abstractmethod function?
by Allen Li Dec. 9, 2013

Dec. 9, 2013

On Thu, Dec 05, 2013 at 01:33:00PM -0800, Guido van Rossum wrote: > > The only two alternatives are doing nothing/pass/return > > None or having actual code in the method. > > > > The former is only useful to silently ignore blind super() calling, the > > latter you would define and decorate the method normally. > > Actually if you want to support multiple inheritance of your ABC, your > abstract methods *must* be no-ops (or have some kind of default > behavior that can always be done last). I must respectfully disagree with this. If your ABCs aren't meant to be in the MRO, then you should be @registering them as virtual classes and not inheriting them. The trick with Python multiple inheritance and super() (from personal experience) is to not think of it as multiple inheritance (a tree with cycles), but as building the MRO (linear, the same as single inheritance).

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Sort error in Misc/ACKS
by TaeWong Dec. 9, 2013

Dec. 9, 2013

There is a sorting error: The name Jonas Wagner comes before Zachary Ware and Barry Warsaw. Please correct sorting error so that his name appears between Sjoerd de Vries and Niki W. Waibel.

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Add Gentoo packagers of external modules to Misc/ACKS
by TaeWong Dec. 9, 2013

Dec. 9, 2013

Please add the Gentoo packagers of external modules to Misc/ACKS: Rob Cakebread Corentin Chary Ian Delaney Sebastien Fabbro Mike Gilbert Carsten Lohrke Jan Matejka Rafael Martins Patrick McLean Tiziano Müller Dirkjan Ochtman Bryan Østergaard Krzysztof Pawlik Ali Polatel Thomas Raschbacher Jesus Rivero Lisa M. Seelye Fernando Serboncini Jason Shoemaker Lukasz Strzygowski Michael Tindal Alastair Tse Amadeusz Żołnowski Marien Zwart

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