Mailman 3 April 2013 - Python-Dev

distutils win32 multiple extensions
by ebacry April 23, 2013

April 23, 2013

Hello, I am writing some C extensions (using swig). A first extension (a python module) which I'll call E1. I wrote a setup.py which works fine on all platforms. On Windows 7 it creates a library which is a .pyd file Now I want to write a second C extension E2 that is calling some functions of E1. The same kind of setup.py works fine on all platforms but Windows where it says (during the link) that the function sof E1 that are called by E2 are unreferenced. I am clearly not a Windows pro ... I am using mingw32 on Windows. Surfing the web, I understood that shared libraries work differently on windows than on other platforms. And that I should 1- export the symbols (i.e., the functions) of E1 when I build E1. In the distutils.Extension this seems to be done using argument export_symbols=[list of symbols to export] Now I have one problem : each time I specify in this list the name of a function in E1 it says that it doesn't know this symbol What am I doing wrong here, is there a special syntax ? 2- Now in the setup.py of E2 how do I declare that I want to use the E1 shared lib.? Is the information on the exported symbol of E1 in the .pyd file or in the .def file ? I tried to specify the .pyd library in the arguments of the distutils.Extension .... but I have the feeling that's not the right thing to do (I have the feeling the .pyd is not the right file to point to) Not mentioning the problem specifying the path of the library with runtime_library_dirs ... which does not seem to work at all. Is there a simple way to do what I want to do ? I did not find anything on the web explaining clearly what to do ... I am really really stuck I would appreciate any kind of help Emmanuel -- View this message in context: http://python.6.x6.nabble.com/distutils-win32-multiple-extensions-tp5015138… Sent from the Python - python-dev mailing list archive at Nabble.com.

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distutils win32 multiple extensions
by ebacry April 23, 2013

April 23, 2013

Hello,I am writing some C extensions (using swig).A first extension (a python module) which I'll call E1.I wrote a setup.py which works fine on all platforms.On Windows 7 it creates a library which is a .pyd fileNow I want to write a second C extension E2 that is calling some functions of E1.The same kind of setup.py works fine on all platforms but Windows where it says (during the link) that the function sof E1 that are called by E2 are unreferenced.I am clearly not a Windows pro ... I am using mingw32 on Windows.Surfing the web, I understood that shared libraries work differently on windows than on other platforms. And that I should1- export the symbols (i.e., the functions) of E1 when I build E1. In the distutils.Extension this seems to be done using argument export_symbols=[list of symbols to export]Now I have one problem : each time I specify in this list the name of a function in E1 it says that it doesn't know this symbolWhat am I doing wrong here, is there a special syntax ?2- Now in the setup.py of E2 how do I declare that I want to use the E1 shared lib.? Is the information on the exported symbol of E1 in the .pyd file or in the .def file ?I tried to specify the .pyd library in the arguments of the distutils.Extension .... but I have the feeling that's not the right thing to do (I have the feeling the .pyd is not the right file to point to)Not mentioning the problem specifying the path of the library with runtime_library_dirs ... which does not seem to work at all.Is there a simple way to do what I want to do ?I did not find anything on the web explaining clearly what to do ...I am really really stuckI would appreciate any kind of help Emmanuel -- View this message in context: http://python.6.x6.nabble.com/distutils-win32-multiple-extensions-tp5015137… Sent from the Python - python-dev mailing list archive at Nabble.com.

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Re: [Python-Dev] cpython: Simplify the code of get_attrib_from_keywords somewhat.
by Serhiy Storchaka April 22, 2013

April 22, 2013

On 22.04.13 15:52, eli.bendersky wrote: > http://hg.python.org/cpython/rev/c9674421d78e > changeset: 83494:c9674421d78e > user: Eli Bendersky <eliben(a)gmail.com> > date: Mon Apr 22 05:52:16 2013 -0700 > summary: > Simplify the code of get_attrib_from_keywords somewhat. > - PyDict_DelItem(kwds, attrib_str); > + PyDict_DelItemString(kwds, ATTRIB_KEY); PyDict_GetItemString() and PyDict_DelItemString() internally create a Python string. I.e. new code creates one additional string if attrib was found in kwds. > - if (attrib) > - PyDict_Update(attrib, kwds); > + assert(attrib); attrib can be NULL in case of memory allocation error.

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Re: [Python-Dev] PEP 435 -- Adding an Enum type to the Python standard library
by Rurpy April 21, 2013

April 21, 2013

On 04/20/2013 01:42 PM, Barry Warsaw wrote:> On Apr 13, 2013, at 12:51 PM, Steven D'Aprano wrote: >[...] >>What's the justification for this [unique values] restriction? I have >>looked in the PEP, and didn't see one. > > If you allowed this, there would be no way to look up an enumeration item by > value. This is necessary for e.g. storing the value in a database. If you > know that the "insect" column is an INTEGER that represents an enumeration > item of Insect, then you can just store the int value in the column. To > reconstitute the actual enumeration item when you read the column back from > the database, you need to be able to look up the item by value. >[...] Composite keys have been part of relational databases from their inception. If you want to store an enumeration value in a database when non-unique values are possible, you can do so simply by storing the name, value pair; i.e. use two columns instead of one. Of course this does not preclude storing just the value when you know they will be unique. But it is not true that unique values are *required* for storing enumeration values in a database.

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Re: [Python-Dev] [Python-checkins] cpython: #11182: remove the unused and undocumented pydoc.Scanner class. Patch by
by Nick Coghlan April 19, 2013

April 19, 2013

On Fri, Apr 19, 2013 at 9:53 AM, ezio.melotti <python-checkins(a)python.org> wrote: > http://hg.python.org/cpython/rev/465cb5ce5a7e > changeset: 83443:465cb5ce5a7e > user: Ezio Melotti <ezio.melotti(a)gmail.com> > date: Fri Apr 19 02:53:12 2013 +0300 > summary: > #11182: remove the unused and undocumented pydoc.Scanner class. Patch by Martin Morrison. I was going to comment on the lack of a leading underscore, but then I saw Terry's comment about pydoc.__all__ on the tracker issue. Carry on, nothing to see here :) Cheers, Nick. -- Nick Coghlan | ncoghlan(a)gmail.com | Brisbane, Australia

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Summary of Python tracker Issues
by Python tracker April 19, 2013

April 19, 2013

ACTIVITY SUMMARY (2013-04-12 - 2013-04-19) 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 3928 (+20) closed 25642 (+73) total 29570 (+93) Open issues with patches: 1745 Issues opened (66) ================== #13355: random.triangular error when low = high=mode http://bugs.python.org/issue13355 reopened by rhettinger #14398: bz2.BZ2DEcompressor.decompress fail on large files http://bugs.python.org/issue14398 reopened by nadeem.vawda #17705: Fill Character cannot be \0 http://bugs.python.org/issue17705 opened by Julian #17708: sys.flags.hash_randomization doesn't return correct value http://bugs.python.org/issue17708 opened by msmhrt #17709: http://docs.python.org/2.7/objects.inv doesn't support :func:` http://bugs.python.org/issue17709 opened by ras #17711: Persistent id in pickle with protocol version 0 http://bugs.python.org/issue17711 opened by serhiy.storchaka #17712: test_gdb failures http://bugs.python.org/issue17712 opened by pitrou #17714: str.encode('base64') add trailing new line character. It is no http://bugs.python.org/issue17714 opened by alex.75 #17716: From ... import fails when parent package failed but child mod http://bugs.python.org/issue17716 opened by Pascal.Chambon #17717: Set up nasm from external.bat http://bugs.python.org/issue17717 opened by jpe #17718: boolop constant checking for if/while http://bugs.python.org/issue17718 opened by Stephen.Tu #17720: pickle.py's load_appends should call append() on objects other http://bugs.python.org/issue17720 opened by alexandre.vassalotti #17721: Help button on preference window doesn't work http://bugs.python.org/issue17721 opened by Guilherme.Simões #17723: Use FileRead and FileWrite in fileio.c on Windows http://bugs.python.org/issue17723 opened by jpe #17725: English mistake in Extending and Embedding Python doc page. http://bugs.python.org/issue17725 opened by Kyle.Simpson #17727: document that some distributions change site.py defaults http://bugs.python.org/issue17727 opened by georg.brandl #17729: advocacy howto improvements http://bugs.python.org/issue17729 opened by georg.brandl #17730: code.interact() doesn't support no banner http://bugs.python.org/issue17730 opened by Drekin #17732: distutils.cfg Can Break venv http://bugs.python.org/issue17732 opened by nicksloan #17733: Add tests to test__header_value_parser for RFC 2231 parsing co http://bugs.python.org/issue17733 opened by Ankur.Ankan #17734: Failure when running test_builtin after test_genexps http://bugs.python.org/issue17734 opened by ncoghlan #17735: inspect.findsource throws IndexError http://bugs.python.org/issue17735 opened by Kyle.Simpson #17736: Misleading method comment in _elementtree.c : get_attrib_from_ http://bugs.python.org/issue17736 opened by Sjlver #17737: test_gdb fails on armv7hl http://bugs.python.org/issue17737 opened by bkabrda #17742: Add _PyBytesWriter API http://bugs.python.org/issue17742 opened by haypo #17743: Use extended syntax of `set` command in activate.bat/deactivat http://bugs.python.org/issue17743 opened by piotr.dobrogost #17744: Unset VIRTUAL_ENV environment variable in deactivate.bat http://bugs.python.org/issue17744 opened by piotr.dobrogost #17745: "packaging" no longer planned to be included http://bugs.python.org/issue17745 opened by tshepang #17746: test_shutil.TestWhich.test_non_matching_mode fails when runnin http://bugs.python.org/issue17746 opened by jibel #17747: Deprecate pickle fast mode http://bugs.python.org/issue17747 opened by alexandre.vassalotti #17750: allow the testsuite to run in the installed location http://bugs.python.org/issue17750 opened by doko #17751: ctypes/test/test_macholib.py fails when run from the installed http://bugs.python.org/issue17751 opened by doko #17752: many distutils tests fail when run from the installed location http://bugs.python.org/issue17752 opened by doko #17753: test_zipfile: requires write access to test and email.test http://bugs.python.org/issue17753 opened by doko #17754: test_ctypes assumes LANG=C LC_ALL=C http://bugs.python.org/issue17754 opened by doko #17755: test_builtin assumes LANG=C http://bugs.python.org/issue17755 opened by doko #17756: test_syntax_error fails when run in the installed location http://bugs.python.org/issue17756 opened by doko #17758: test_site fails when the user does not have a home directory http://bugs.python.org/issue17758 opened by doko #17759: test_urllibnet.test_bad_address() fails on Ubuntu 13.04 http://bugs.python.org/issue17759 opened by barry #17761: platform._parse_release_file doesn't close the /etc/lsb-releas http://bugs.python.org/issue17761 opened by doko #17762: platform.linux_distribution() should honor /etc/os-release http://bugs.python.org/issue17762 opened by doko #17763: test_pydoc fails with the installed testsuite http://bugs.python.org/issue17763 opened by doko #17764: Support http.server passing bind address via commend line argu http://bugs.python.org/issue17764 opened by malte.swart #17765: weakref.ref ignores a 'callback' keyword argument http://bugs.python.org/issue17765 opened by mark.dickinson #17767: Fix test discovery for test_locale.py http://bugs.python.org/issue17767 opened by zach.ware #17768: _decimal: allow NUL fill character http://bugs.python.org/issue17768 opened by skrah #17769: python-config --ldflags gives broken output when statically li http://bugs.python.org/issue17769 opened by Max.Cantor #17772: test_gdb doesn't detect a gdb built with python3.3 (or higher) http://bugs.python.org/issue17772 opened by doko #17773: test_pydoc fails with the installed testsuite (2.7) http://bugs.python.org/issue17773 opened by doko #17774: unable to disable -r in run_tests.py http://bugs.python.org/issue17774 opened by doko #17776: IDLE Internationalization http://bugs.python.org/issue17776 opened by mariedam #17777: Unrecognized string literal escape sequences give SyntaxErrors http://bugs.python.org/issue17777 opened by reynir #17778: Fix test discovery for test_multiprocessing.py http://bugs.python.org/issue17778 opened by zach.ware #17780: the test suite should use a TEMPDIR in the build directory, no http://bugs.python.org/issue17780 opened by doko #17781: optimize compilation options http://bugs.python.org/issue17781 opened by pitrou #17783: run the testsuite in batched mode http://bugs.python.org/issue17783 opened by doko #17784: the test suite should honor an http_proxy for running the test http://bugs.python.org/issue17784 opened by doko #17785: Use faster URL shortener for perf.py http://bugs.python.org/issue17785 opened by alexandre.vassalotti #17786: Crash in test_ctypes.test_callbacks() on AMD64 NetBSD 5.1.2 [S http://bugs.python.org/issue17786 opened by haypo #17787: Optimize pickling function dispatch in hot loops. http://bugs.python.org/issue17787 opened by alexandre.vassalotti #17791: PC/pyconfig.h defines PREFIX macro http://bugs.python.org/issue17791 opened by christian.heimes #17792: Unhelpful UnboundLocalError due to del'ing of exception target http://bugs.python.org/issue17792 opened by barry #17794: Priority Queue http://bugs.python.org/issue17794 opened by Claymore #17795: backwards-incompatible change in SysLogHandler with unix domai http://bugs.python.org/issue17795 opened by Mike.Lundy #17796: No mimetype guessed for tar.xz url http://bugs.python.org/issue17796 opened by lcid-fire #17797: Visual C++ 11.0 reports fileno(stdin) == 0 for non-console pro http://bugs.python.org/issue17797 opened by mloskot Most recent 15 issues with no replies (15) ========================================== #17795: backwards-incompatible change in SysLogHandler with unix domai http://bugs.python.org/issue17795 #17791: PC/pyconfig.h defines PREFIX macro http://bugs.python.org/issue17791 #17786: Crash in test_ctypes.test_callbacks() on AMD64 NetBSD 5.1.2 [S http://bugs.python.org/issue17786 #17785: Use faster URL shortener for perf.py http://bugs.python.org/issue17785 #17784: the test suite should honor an http_proxy for running the test http://bugs.python.org/issue17784 #17783: run the testsuite in batched mode http://bugs.python.org/issue17783 #17780: the test suite should use a TEMPDIR in the build directory, no http://bugs.python.org/issue17780 #17774: unable to disable -r in run_tests.py http://bugs.python.org/issue17774 #17773: test_pydoc fails with the installed testsuite (2.7) http://bugs.python.org/issue17773 #17769: python-config --ldflags gives broken output when statically li http://bugs.python.org/issue17769 #17767: Fix test discovery for test_locale.py http://bugs.python.org/issue17767 #17765: weakref.ref ignores a 'callback' keyword argument http://bugs.python.org/issue17765 #17764: Support http.server passing bind address via commend line argu http://bugs.python.org/issue17764 #17762: platform.linux_distribution() should honor /etc/os-release http://bugs.python.org/issue17762 #17756: test_syntax_error fails when run in the installed location http://bugs.python.org/issue17756 Most recent 15 issues waiting for review (15) ============================================= #17795: backwards-incompatible change in SysLogHandler with unix domai http://bugs.python.org/issue17795 #17792: Unhelpful UnboundLocalError due to del'ing of exception target http://bugs.python.org/issue17792 #17787: Optimize pickling function dispatch in hot loops. http://bugs.python.org/issue17787 #17785: Use faster URL shortener for perf.py http://bugs.python.org/issue17785 #17783: run the testsuite in batched mode http://bugs.python.org/issue17783 #17781: optimize compilation options http://bugs.python.org/issue17781 #17778: Fix test discovery for test_multiprocessing.py http://bugs.python.org/issue17778 #17776: IDLE Internationalization http://bugs.python.org/issue17776 #17768: _decimal: allow NUL fill character http://bugs.python.org/issue17768 #17767: Fix test discovery for test_locale.py http://bugs.python.org/issue17767 #17764: Support http.server passing bind address via commend line argu http://bugs.python.org/issue17764 #17761: platform._parse_release_file doesn't close the /etc/lsb-releas http://bugs.python.org/issue17761 #17747: Deprecate pickle fast mode http://bugs.python.org/issue17747 #17742: Add _PyBytesWriter API http://bugs.python.org/issue17742 #17736: Misleading method comment in _elementtree.c : get_attrib_from_ http://bugs.python.org/issue17736 Top 10 most discussed issues (10) ================================= #17618: base85 encoding http://bugs.python.org/issue17618 18 msgs #17732: distutils.cfg Can Break venv http://bugs.python.org/issue17732 15 msgs #16694: Add pure Python operator module http://bugs.python.org/issue16694 14 msgs #16624: subprocess.check_output should allow specifying stdin as a str http://bugs.python.org/issue16624 13 msgs #5004: socket.getfqdn() doesn't cope properly with purely DNS-based s http://bugs.python.org/issue5004 9 msgs #17792: Unhelpful UnboundLocalError due to del'ing of exception target http://bugs.python.org/issue17792 9 msgs #13355: random.triangular error when low = high=mode http://bugs.python.org/issue13355 8 msgs #15301: os.chown: OverflowError: Python int too large to convert to C http://bugs.python.org/issue15301 8 msgs #17353: Plistlib outputs empty data tags when deeply nested http://bugs.python.org/issue17353 8 msgs #17673: add `copy_from` argument to temporaryfile http://bugs.python.org/issue17673 8 msgs Issues closed (74) ================== #2118: smtplib.SMTP() raises socket.error rather than SMTPConnectErro http://bugs.python.org/issue2118 closed by r.david.murray #4140: urllib2: request with digest auth through proxy fail http://bugs.python.org/issue4140 closed by orsenthil #6386: importing yields unexpected results when initial script is a s http://bugs.python.org/issue6386 closed by brett.cannon #6783: Add a builtin method to 'int' for base/radix conversion http://bugs.python.org/issue6783 closed by r.david.murray #7100: test_xmlrpc: global name 'stop_serving' is not defined http://bugs.python.org/issue7100 closed by pitrou #11182: remove unused undocumented pydoc.Scanner class http://bugs.python.org/issue11182 closed by ezio.melotti #12768: docstrings for the threading module http://bugs.python.org/issue12768 closed by eli.bendersky #13050: RLock support the context manager protocol but this is not doc http://bugs.python.org/issue13050 closed by georg.brandl #13510: Clarify that readlines() is not needed to iterate over a file http://bugs.python.org/issue13510 closed by ezio.melotti #13638: PyErr_SetFromErrnoWithFilenameObject is undocumented http://bugs.python.org/issue13638 closed by python-dev #13775: Access Denied message on symlink creation misleading for an ex http://bugs.python.org/issue13775 closed by serhiy.storchaka #14462: In re's named group the name cannot contain unicode characters http://bugs.python.org/issue14462 closed by python-dev #14735: Version 3.2.3 IDLE CTRL-Z plus Carriage Return to end does not http://bugs.python.org/issue14735 closed by roger.serwy #15480: Drop TYPE_INT64 from marshal in Python 3.4 http://bugs.python.org/issue15480 closed by pitrou #16061: performance regression in string replace for 3.3 http://bugs.python.org/issue16061 closed by serhiy.storchaka #16163: Wrong name in Lib/pkgutil.py:iter_importers http://bugs.python.org/issue16163 closed by ncoghlan #16447: SEGFAULT when setting type.__name__ http://bugs.python.org/issue16447 closed by mark.dickinson #16550: pickletools.py treats 32bit lengths as signed, but pickle.py a http://bugs.python.org/issue16550 closed by serhiy.storchaka #16551: Cleanup the pure Python pickle implementation http://bugs.python.org/issue16551 closed by python-dev #16658: Missing "return" in HTTPConnection.send() http://bugs.python.org/issue16658 closed by asvetlov #16804: python3 -S -m site fails http://bugs.python.org/issue16804 closed by meador.inge #16812: os.symlink can return wrong FileExistsError/WindowsError infor http://bugs.python.org/issue16812 closed by serhiy.storchaka #17012: Differences between /usr/bin/which and shutil.which() http://bugs.python.org/issue17012 closed by barry #17016: _sre: avoid relying on pointer overflow http://bugs.python.org/issue17016 closed by serhiy.storchaka #17135: imp doc should direct to importlib http://bugs.python.org/issue17135 closed by r.david.murray #17244: py_compile.compile() fails to raise exceptions when writing of http://bugs.python.org/issue17244 closed by brett.cannon #17320: os.path.abspath in window7, return error http://bugs.python.org/issue17320 closed by xiaowei.py #17341: Poor error message when compiling invalid regex http://bugs.python.org/issue17341 closed by r.david.murray #17491: Consolidate traceback.format_tb and traceback.print_tb http://bugs.python.org/issue17491 closed by benjamin.peterson #17536: update browser list with additional browser names http://bugs.python.org/issue17536 closed by doko #17555: ForkAwareThreadLock leak after fork http://bugs.python.org/issue17555 closed by sbt #17571: broken links on Lib/datetime.py docstring http://bugs.python.org/issue17571 closed by ezio.melotti #17573: add ElementTree XML processing benchmark to benchmark suite http://bugs.python.org/issue17573 closed by pitrou #17575: HTTPConnection.send http://bugs.python.org/issue17575 closed by dspublic(a)freemail.hu #17643: Expose weakref callback for introspection purposes. http://bugs.python.org/issue17643 closed by mark.dickinson #17647: subprocess.communicate() should preserve colored output on Win http://bugs.python.org/issue17647 closed by terry.reedy #17653: fix typo in socketserver.rst http://bugs.python.org/issue17653 closed by ezio.melotti #17661: documentation of '%r' links to the wrong repr http://bugs.python.org/issue17661 closed by python-dev #17676: spwd uses -1 for empty attributes http://bugs.python.org/issue17676 closed by terry.reedy #17686: Doc using/unix broken link (http://linuxmafia.com/) http://bugs.python.org/issue17686 closed by ezio.melotti #17694: Enhance _PyUnicodeWriter API to control minimum buffer length http://bugs.python.org/issue17694 closed by python-dev #17702: os.environ converts key type from string to bytes in KeyError http://bugs.python.org/issue17702 closed by python-dev #17703: Trashcan mechanism segfault during interpreter finalization in http://bugs.python.org/issue17703 closed by pitrou #17706: Segfault in PyErr_SetObject http://bugs.python.org/issue17706 closed by pitrou #17707: Multiprocessing queue get method does not block for short time http://bugs.python.org/issue17707 closed by giampaolo.rodola #17710: SystemError in cPickle for incorrect input http://bugs.python.org/issue17710 closed by pitrou #17713: test_logging fails in test_compute_rollover_weekly_attime http://bugs.python.org/issue17713 closed by python-dev #17715: Raising an exception in __trunc__ gives a segmentation fault. http://bugs.python.org/issue17715 closed by mark.dickinson #17719: IDLE help text refers to incorrect Python version http://bugs.python.org/issue17719 closed by r.david.murray #17722: 'round' function doesn't honour a descriptor __round__ http://bugs.python.org/issue17722 closed by python-dev #17724: urllib -- add_handler method refactoring for clarity http://bugs.python.org/issue17724 closed by Max.Mautner #17726: faq/design: improve clarity http://bugs.python.org/issue17726 closed by python-dev #17728: format() default precisions undocumented http://bugs.python.org/issue17728 closed by eric.smith #17731: test_iter_importers intermittent failure in test_pkgutil http://bugs.python.org/issue17731 closed by python-dev #17738: Unnecessary "if" in SHA1_copy http://bugs.python.org/issue17738 closed by python-dev #17739: ssl.SSLSocket.getpeercert does not return client certificate http://bugs.python.org/issue17739 closed by pitrou #17740: :func:`socket` in socket.rst links to socket module, not socke http://bugs.python.org/issue17740 closed by ezio.melotti #17741: event-driven XML parser http://bugs.python.org/issue17741 closed by pitrou #17748: Condition.wait timeout can't be set to more than 50 ms http://bugs.python.org/issue17748 closed by pitrou #17749: root logging functions break logger configuration http://bugs.python.org/issue17749 closed by vinay.sajip #17757: test_executable_without_cwd fails when run in the installed lo http://bugs.python.org/issue17757 closed by ned.deily #17760: No i18n of IDLE's interface in french http://bugs.python.org/issue17760 closed by ezio.melotti #17766: Fix test discovery for test_iterlen.py http://bugs.python.org/issue17766 closed by ezio.melotti #17770: MSI installer default behaviour inconsistent http://bugs.python.org/issue17770 closed by Harry.Johnston #17771: Missing period in concurrent execution doc in standard library http://bugs.python.org/issue17771 closed by ezio.melotti #17775: Error with Hello, World in 3.3.1 http://bugs.python.org/issue17775 closed by walkah21 #17779: Fix test discovery for test_osx_env.py http://bugs.python.org/issue17779 closed by ezio.melotti #17782: Fix test_signal failure on x32 http://bugs.python.org/issue17782 closed by pitrou #17788: Add a with expression, for use in comprehensions http://bugs.python.org/issue17788 closed by eric.smith #17789: Fix test discovery for test_random.py http://bugs.python.org/issue17789 closed by ezio.melotti #17790: Fix test discovery for test_set.py http://bugs.python.org/issue17790 closed by ezio.melotti #17793: spam http://bugs.python.org/issue17793 closed by ezio.melotti #1626300: 'Installing Python Modules' does not work for Windows http://bugs.python.org/issue1626300 closed by eric.araujo #992389: attribute error due to circular import http://bugs.python.org/issue992389 closed by ncoghlan

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libffi inclusion in python
by Maciej Fijalkowski April 19, 2013

April 19, 2013

Hi libffi has bugs sometimes (like this http://bugs.python.org/issue17580). Now this is a thing that upstream fixes really quickly, but tracking down issues on bugs.python.org is annoying (they never get commited as quickly as the upstream). is there a good reason why cpython has it's own copy of libffi? I understand historical reasons, but PyPy gets along relying on the system library, so maybe we can kill the inclusion. Cheers, fijal

7 9

mimetypes broken on Windows
by Ben Hoyt April 17, 2013

April 17, 2013

Hi folks, The built-in mimetypes module is broken on Windows, and it has been since Python 2.7 alpha 1. On all Windows systems I've tried, guess_type() returns the wrong mime type for common types like .png and .jpg. For example (on Python 2.7.4 and 3.3.1): >>> import mimetypes >>> mimetypes.guess_type('f.png') ('image/x-png', None) >>> mimetypes.guess_type('f.jpg') ('image/pjpeg', None) These should be 'image/png' and 'image/jpeg', respectively. There's an open issue for this: http://bugs.python.org/issue15207. However, it hasn't gotten any love in the last few months, so per r.david.murray's comment, I'm posting it here. Dave Chambers, who opened the bug, has proposed a fix, which is significantly better (i.e., not totally broken for common types). However, as I mentioned in http://bugs.python.org/issue15207#msg177030, using the Windows registry for this at all is basically a bad idea, because: 1) Important keys like .jpg and .png aren't in the registry anyway. 2) Some that do exist are wrong in the Windows registry. This includes .zip, which is "application/x-zip-compressed" (at least in my registry) but should be "application/zip". 3) It makes the first call to guess_type() slow (~100ms), which isn't terrible, but with the above concerns, not worth it. 4) Perhaps most importantly: the keys in the Windows registry depend on what programs you have installed. And the users and programs can change registry keys at will. Obviously one can work around this bug, either by calling mimetypes.init(files=[]) before any calls to guess_type, or calling init() with your own mime types file. However, "broken out of the box" is going to cause a lot of people headaches. :-) So my proposal is simply to get rid of read_windows_registry() altogether, and fall back to the default type mapping in mimetypes.py on Windows systems. This is correct and fast, even if not complete. As always, folks can always use their own mimetypes file if they want. In summary: the current behaviour is buggy and broken, the behaviour proposed in Issue 15207 is problematic, getting this from the Windows registry is bad idea, and we should revert the whole registry thing. :-) If folks agree with my reasoning above, I can provide a patch to fix this, along with a patch to the Windows unit tests. -Ben P.S. Kind of proving my point about the fragility of using the registry, the Python 2.7.4 unit test test_registry_parsing in test_mimetypes.py fail on my machine. It's because I've installed some SQL server, and text/plain is my registry is mapped from .sql (instead of .txt), causing this: Traceback (most recent call last): File "C:\python27\lib\test\test_mimetypes.py", line 85, in test_registry_parsing eq(self.db.guess_type("foo.txt"), ("text/plain", None)) AssertionError: Tuples differ: (None, None) != ('text/plain', None)

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Sharing docstrings between the Python and C implementations of a module
by David Lam April 16, 2013

April 16, 2013

Recently I helped out on issue16954 which involved filling in docstrings for methods and classes in ElementTree.py While doing so, I tried to test my work in the interpreter like this... >>> from xml.etree.ElementTree import Element >>> help(Element) ...but found that help() showed nothing but empty strings! After some debugging, I found that the culprit was the `from _elementtree import *` near the bottom of the module. Not wanting to copy & paste docstrings around, I thought one solution might be to just reassign Element.__doc__ with the right docstring. But, it seems that you can't do that for C extensions: >>> from _elementtree import Element as cElement >>> cElement.__doc__ = 'correct docstring' Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: can't set attributes of built-in/extension type 'xml.etree.ElementTree.Element' --- Q. Is there way to maintain the same docstring without resorting to copying and pasting it in two places? I tried to find an example in the source which addressed this, but found that the docstrings in similar cases to be largely duplicated. For instance, _datetimemodule.c, decimal_.c and _json.c all seem to exhibit this docstring copy and pastage.

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Introducing Electronic Contributor Agreements
by Brian Curtin April 15, 2013

April 15, 2013

The full announcement is at http://blog.python.org/2013/03/introducing-electronic-contributor.html, but a summary follows. We've now moved to an electronic Contributor License Agreement form at http://www.python.org/psf/contrib/contrib-form/ which will hopefully ease the signing and sending of forms for our potential contributors. The form shows the required fields whether you're signing as an individual or a representative of an organization, and removes the need to print, scan, fax, etc. When a new contributor fills in the form, they are emailed a copy of the form and asked to confirm the email address that they used (and received that copy at). Upon confirming, the signed form is sent to the PSF Administrator and filed away. The signature can either be generated from your typed name, or you can draw or upload your actual written signature if you choose.

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