Mailman 3 June 2010 - Python-Dev

[RELEASE] Python 2.7 release candidate 1 released
by Benjamin Peterson June 6, 2010

June 6, 2010

On behalf of the Python development team, I'm effusive to announce the first release candidate of Python 2.7. Python 2.7 is scheduled (by Guido and Python-dev) to be the last major version in the 2.x series. However, 2.7 will have an extended period of bugfix maintenance. 2.7 includes many features that were first released in Python 3.1. The faster io module, the new nested with statement syntax, improved float repr, set literals, dictionary views, and the memoryview object have been backported from 3.1. Other features include an ordered dictionary implementation, unittests improvements, a new sysconfig module, and support for ttk Tile in Tkinter. For a more extensive list of changes in 2.7, see http://doc.python.org/dev/whatsnew/2.7.html or Misc/NEWS in the Python distribution. To download Python 2.7 visit: http://www.python.org/download/releases/2.7/ While this is a preview release and is thus not suitable for production use, we strongly encourage Python application and library developers to test the release with their code and report any bugs they encounter to: http://bugs.python.org/ This helps ensure that those upgrading to Python 2.7 will encounter as few bumps as possible. 2.7 documentation can be found at: http://docs.python.org/2.7/ Enjoy! -- Benjamin Peterson Release Manager benjamin at python.org (on behalf of the entire python-dev team and 2.7's contributors)

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Windows registry path not ignored with Py_IgnoreEnvironmentFlag set
by Farshid Lashkari June 5, 2010

June 5, 2010

Hello, I noticed that if Py_IgnoreEnvironmentFlag is enabled, the Windows registry is still used to initialize sys.path during startup. Is this an oversight or intentional? I assumed one of the intentions of this flag is to prevent embedded Python interpreters from being affected by other Python installations. Ignoring the Window registry as well as environment variables seems to make sense in this situation. If this is an oversight, would it be too late to have this fixed in Python 2.7? Cheers, Farshid

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Summary of Python tracker Issues
by Python tracker June 4, 2010

June 4, 2010

ACTIVITY SUMMARY (2010-05-28 - 2010-06-04) Python tracker at http://bugs.python.org/ To view or respond to any of the issues listed below, click on the issue number. Do NOT respond to this message. 2727 open (+38) / 17988 closed (+15) / 20715 total (+53) Open issues with patches: 1103 Average duration of open issues: 719 days. Median duration of open issues: 504 days. Open Issues Breakdown open 2706 (+38) languishing 12 ( +0) pending 8 ( +0) Issues Created Or Reopened (58) _______________________________ Seconds range in time unit 2010-06-03 http://bugs.python.org/issue2568 reopened belopolsky patch, easy 26.rc1: test_signal issue on FreeBSD 6.3 2010-06-03 CLOSED http://bugs.python.org/issue3864 reopened skrah patch, easy, buildbot urllib2 basicauth broken in 2.6.5: RuntimeError: maximum recur 2010-06-04 http://bugs.python.org/issue8797 reopened orsenthil TZ offset description is unclear in docs 2010-06-04 http://bugs.python.org/issue8810 reopened belopolsky easy, needs review truncate() semantics changed in 3.1.2 2010-05-28 http://bugs.python.org/issue8840 reopened tjreedy Condition.wait() doesn't raise KeyboardInterrupt 2010-05-28 http://bugs.python.org/issue8844 created hobb0001 Expose sqlite3 connection inTransaction as read-only in_transa 2010-05-28 CLOSED http://bugs.python.org/issue8845 created r.david.murray patch, easy cgi.py bug report + fix: tailing carriage return and newline c 2010-05-28 http://bugs.python.org/issue8846 created wobsta patch crash appending list and namedtuple 2010-05-28 http://bugs.python.org/issue8847 created benrg Deprecate or remove "U" and "U#" formats of Py_BuildValue() 2010-05-29 http://bugs.python.org/issue8848 created haypo patch python.exe problem with cvxopt 2010-05-29 http://bugs.python.org/issue8849 created jroach Remove "w" format of PyParse_ParseTuple() 2010-05-29 http://bugs.python.org/issue8850 created haypo pkgutil document needs more markups 2010-05-29 http://bugs.python.org/issue8851 created mft patch _socket fails to build on OpenSolaris x64 2010-05-29 http://bugs.python.org/issue8852 created drkirkby patch getaddrinfo should accept port of type long 2010-05-29 http://bugs.python.org/issue8853 created AndiDog patch msvc9compiler.py: find_vcvarsall() doesn't work with VS2008 on 2010-05-29 http://bugs.python.org/issue8854 created lemburg 64bit Shelve documentation lacks security warning 2010-05-30 http://bugs.python.org/issue8855 created Longpoke Error in ceval.c when building --without-threads 2010-05-30 CLOSED http://bugs.python.org/issue8856 created merwok socket.getaddrinfo needs tests 2010-05-30 http://bugs.python.org/issue8857 created pitrou patch socket.getaddrinfo returns wrong results for IPv6 addresses 2010-05-30 CLOSED http://bugs.python.org/issue8858 created pitrou split() splits on non whitespace char when ther is no separato 2010-05-30 CLOSED http://bugs.python.org/issue8859 created PeterL Rounding in timedelta constructor is inconsistent with that in 2010-05-31 http://bugs.python.org/issue8860 created belopolsky patch curses.wrapper : unnessesary code 2010-05-31 http://bugs.python.org/issue8861 created july patch curses.wrapper does not restore terminal if curses.getkey() ge 2010-05-31 http://bugs.python.org/issue8862 created july patch Segfault handler: display Python backtrace on segfault 2010-05-31 http://bugs.python.org/issue8863 created haypo patch multiprocessing: undefined struct/union member: msg_control 2010-05-31 http://bugs.python.org/issue8864 created srid select.poll is not thread safe 2010-05-31 http://bugs.python.org/issue8865 created apexo socket.getaddrinfo() should support keyword arguments 2010-05-31 http://bugs.python.org/issue8866 created giampaolo.rodola patch serve.py (using wsgiref) cannot serve Python docs under Python 2010-05-31 http://bugs.python.org/issue8867 created r.david.murray Framework install does not behave as a framework 2010-06-01 CLOSED http://bugs.python.org/issue8868 created mdehoon execfile does not work with UNC paths 2010-06-01 http://bugs.python.org/issue8869 created stier08 --user-access-control=force produces invalid installer on Vist 2010-06-01 CLOSED http://bugs.python.org/issue8870 created techtonik --user-access-control=auto has no effect 2010-06-01 http://bugs.python.org/issue8871 created techtonik if/else stament bug? 2010-06-01 CLOSED http://bugs.python.org/issue8872 created chrits55 Popen uses 333 times as much CPU as a shell pipe on Mac OS X 2010-06-01 http://bugs.python.org/issue8873 created hughsw py3k documentation mentions deprecated opcode LOAD_LOCALS 2010-06-01 CLOSED http://bugs.python.org/issue8874 created Yaniv.Aknin XML-RPC improvement is described twice. 2010-06-02 http://bugs.python.org/issue8875 created naoki distutils should not assume that hardlinks will work 2010-06-02 http://bugs.python.org/issue8876 created samtygier patch 2to3 fixes stdlib import wrongly 2010-06-02 CLOSED http://bugs.python.org/issue8877 created djc IDLE - str(integer) - TypeError: 'str' object is not callable 2010-06-02 CLOSED http://bugs.python.org/issue8878 created Stranger381 Implement os.link on Windows 2010-06-02 http://bugs.python.org/issue8879 created brian.curtin ConfigParser.set does not convert non-string values 2010-06-02 CLOSED http://bugs.python.org/issue8880 created Edwin.Pozharski socket.getaddrinfo() should return named tuples 2010-06-02 http://bugs.python.org/issue8881 created giampaolo.rodola socketmodule.c`getsockaddrarg() should not check the length of 2010-06-03 http://bugs.python.org/issue8882 created Edward.Pilatowicz Proxy exception lookup fails on MacOS in urllib. 2010-06-03 http://bugs.python.org/issue8883 created yorik.sar patch Allow binding to local address in http.client 2010-06-03 CLOSED http://bugs.python.org/issue8884 created Gaz.Davidson markerbase declaration errors aren't recoverable 2010-06-03 http://bugs.python.org/issue8885 created mnot zipfile.ZipExtFile is a context manager, but that is not docum 2010-06-03 http://bugs.python.org/issue8886 created sandberg patch “pydoc str” works but not “pydoc str.translate” 2010-06-03 http://bugs.python.org/issue8887 created merwok Promote SafeConfigParser and warn about ConfigParser 2010-06-03 http://bugs.python.org/issue8888 created merwok test_support.transient_internet fails on Freebsd because socke 2010-06-03 http://bugs.python.org/issue8889 created r.david.murray patch Modules have dangerous examples in documentation 2010-06-04 http://bugs.python.org/issue8890 reopened Henri.Salo sort files before archiving for consistency 2010-06-03 http://bugs.python.org/issue8891 created techtonik patch 2to3 fails with assertion failure on "from itertools import *" 2010-06-03 http://bugs.python.org/issue8892 created dmalcolm patch file.{read,readlines} behaviour on Solaris 2010-06-03 http://bugs.python.org/issue8893 created kalt patch, needs review urllib2 authentication manager retries forever if password is 2010-06-04 CLOSED http://bugs.python.org/issue8894 created Jurjen newline vs. newlines in io module 2010-06-04 CLOSED http://bugs.python.org/issue8895 created jmfauth email.encoders.encode_base64 sets payload to bytes, should set 2010-06-04 CLOSED http://bugs.python.org/issue8896 created forest_atq patch Issues Now Closed (39) ______________________ distutils sdist add_defaults does not add data_files 813 days http://bugs.python.org/issue2279 merwok Vista UAC/elevation support for bdist_wininst 785 days http://bugs.python.org/issue2581 techtonik patch, patch 26.rc1: test_signal issue on FreeBSD 6.3 0 days http://bugs.python.org/issue3864 skrah patch, easy, buildbot Real segmentation fault handler 609 days http://bugs.python.org/issue3999 haypo patch Fix complex type to avoid coercion in 2.7. 474 days http://bugs.python.org/issue5211 mark.dickinson easy datetime.monthdelta 453 days http://bugs.python.org/issue5434 belopolsky patch Contradictory documentation for email.mime.text.MIMEText 317 days http://bugs.python.org/issue6521 r.david.murray patch shadows around the io truncate() semantics 253 days http://bugs.python.org/issue6939 ncoghlan patch Improve explanation of tab expansion in doctests 155 days http://bugs.python.org/issue7583 r.david.murray patch Too narrow platform check in test_datetime 113 days http://bugs.python.org/issue7879 belopolsky patch, 26backport Improve test_os._kill (failing on slow machines) 44 days http://bugs.python.org/issue8405 haypo patch Test assumptions for test_itimer_virtual and test_itimer_prof 48 days http://bugs.python.org/issue8424 skrah patch, buildbot Changes to content of Demo/turtle 24 days http://bugs.python.org/issue8616 georg.brandl patch test_winsound fails when no playback devices configured 28 days http://bugs.python.org/issue8618 brian.curtin patch 2.7 regression in tarfile: IOError: link could not be created 17 days http://bugs.python.org/issue8741 lars.gustaebel integer-to-complex comparisons give incorrect results 12 days http://bugs.python.org/issue8748 minge patch urllib.urlencode documentation unclear on doseq 10 days http://bugs.python.org/issue8788 orsenthil IDLE editior not opening 3 days http://bugs.python.org/issue8829 orsenthil tarfile: broken hardlink handling and testcase. 7 days http://bugs.python.org/issue8833 lars.gustaebel patch PyArg_ParseTuple(): remove old and unused "O?" format 1 days http://bugs.python.org/issue8837 haypo patch Expose sqlite3 connection inTransaction as read-only in_transa 3 days http://bugs.python.org/issue8845 r.david.murray patch, easy Error in ceval.c when building --without-threads 0 days http://bugs.python.org/issue8856 benjamin.peterson socket.getaddrinfo returns wrong results for IPv6 addresses 1 days http://bugs.python.org/issue8858 pitrou split() splits on non whitespace char when ther is no separato 1 days http://bugs.python.org/issue8859 PeterL Framework install does not behave as a framework 1 days http://bugs.python.org/issue8868 ronaldoussoren --user-access-control=force produces invalid installer on Vist 1 days http://bugs.python.org/issue8870 techtonik if/else stament bug? 0 days http://bugs.python.org/issue8872 r.david.murray py3k documentation mentions deprecated opcode LOAD_LOCALS 1 days http://bugs.python.org/issue8874 benjamin.peterson 2to3 fixes stdlib import wrongly 0 days http://bugs.python.org/issue8877 benjamin.peterson IDLE - str(integer) - TypeError: 'str' object is not callable 0 days http://bugs.python.org/issue8878 mark.dickinson ConfigParser.set does not convert non-string values 1 days http://bugs.python.org/issue8880 Edwin.Pozharski Allow binding to local address in http.client 0 days http://bugs.python.org/issue8884 loewis urllib2 authentication manager retries forever if password is 0 days http://bugs.python.org/issue8894 orsenthil newline vs. newlines in io module 0 days http://bugs.python.org/issue8895 merwok email.encoders.encode_base64 sets payload to bytes, should set 0 days http://bugs.python.org/issue8896 forest_atq patch timedelta multiply and divide by floating point 1722 days http://bugs.python.org/issue1289118 belopolsky patch unicode in email.MIMEText and email/Charset.py 1647 days http://bugs.python.org/issue1368247 r.david.murray patch email package and Unicode strings handling 1360 days http://bugs.python.org/issue1555842 r.david.murray improve xrange.__contains__ 1036 days http://bugs.python.org/issue1766304 benjamin.peterson patch Top Issues Most Discussed (10) ______________________________ 18 multipart/form-data encoding 704 days open http://bugs.python.org/issue3244 16 sort files before archiving for consistency 1 days open http://bugs.python.org/issue8891 16 datetime lacks concrete tzinfo impl. for UTC 492 days open http://bugs.python.org/issue5094 12 improve xrange.__contains__ 1036 days closed http://bugs.python.org/issue1766304 10 Modules have dangerous examples in documentation 0 days open http://bugs.python.org/issue8890 10 multiprocessing: undefined struct/union member: msg_control 4 days open http://bugs.python.org/issue8864 9 TZ offset description is unclear in docs 1 days open http://bugs.python.org/issue8810 8 Rounding in timedelta constructor is inconsistent with that in 4 days open http://bugs.python.org/issue8860 8 Expose sqlite3 connection inTransaction as read-only in_transac 3 days closed http://bugs.python.org/issue8845 7 --user-access-control=force produces invalid installer on Vista 1 days closed http://bugs.python.org/issue8870

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tp_dealloc
by smarv＠gmx.net June 2, 2010

June 2, 2010

Sorry, I wrote tp_alloc in last post, it should be always tp_dealloc: My tp_dealloc method (of non-subtypable type) calls the freeMem-method of a memory manager (this manager was also used for the corresponding allocation). This freeMem-method deallocates and modifies the memory, which is a valid action, because after free, the memory-manager has ownership of the freed memory. Several memory managers do this (for example the Memory Manager in Delphi during debug mode, in order to track invalid memory access after free). The python31.dll calls tp_dealloc and later (after return of tp_dealloc) the python31.dll is still awaiting valid content in the deallocated memory. I don't know where this happens, I'm not a developer of CPython, but at this point the python31.dll causes an access violation. IMO the python31.dll assumes that freeMem never modifies the memory (pyobject header), this is valid for many memory managers, but not for all. And from my perspective, this assumption a bug, which can cause access violations in many applications (for example, applications which use the PythonForDelphi-package; PyScripter is one of them, but also many others) Please, could some CPython-developer take a look, thank you! -- GRATIS für alle GMX-Mitglieder: Die maxdome Movie-FLAT! Jetzt freischalten unter http://portal.gmx.net/de/go/maxdome01

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tp_dealloc
by smarv＠gmx.net June 1, 2010

June 1, 2010

My tp_dealloc method (of non-subtypable type) calls the freeMem-method of a memory manager (this manager was also used for the corresponding allocation). This freeMem-method deallocates and modifies the memory, which is a valid action, because after free, the memory-manager has ownership of the freed memory. Several memory managers do this (for example the Memory Manager in Delphi during debug mode, in order to track invalid memory access after free). The python31.dll calls tp_alloc and later (after return of tp-alloc) the python31.dll is still awaiting valid content in the deallocated memory. I don't know where this happens, I'm not a developer of CPython, but at this point the python31.dll causes an access violation. IMO the python31.dll assumes that freeMem never modifies the memory (pyobject header), this is valid for many memory managers, but not for all. And from my perspective, this assumption a bug, which can cause access violations in many applications (for example, applications which use the PythonForDelphi-package; PyScripter is one of them, but also many others) Please, could some CPython-developer take a look, thank you! -- GRATIS für alle GMX-Mitglieder: Die maxdome Movie-FLAT! Jetzt freischalten unter http://portal.gmx.net/de/go/maxdome01

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Re: [Python-Dev] Implementing PEP 382, Namespace Packages
by P.J. Eby June 1, 2010

June 1, 2010

At 01:19 PM 5/31/2010 -0700, Brett Cannon wrote: >But as long as whatever mechanism gets exposed allows people to work >from a module name that will be enough. The path connection is not >required as load_module is the end-all-be-all method. If we have a >similar API added for .pth files that works off of module names then >those loaders that don't want to work from file paths don't have to. Right - that's why I suggested that a high-level request like get_pth_contents() would give the implementer the most flexibility. Then they don't have to fake a filesystem if they don't actually work that way. For example, a database that maps module names to code objects has no need for paths at all, and could just return either ['*'] or None depending on whether the package was marked as a namespace package in the database... without needing to fake up the existence of a .pth file in a virtual file system. (Of course, since lots of implementations *do* use filesystem-like backends, giving them some utility functions they can use to implement the API on top of filesystem operations gives us the best of both worlds.)

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tp_dealloc
by smarv＠gmx.net June 1, 2010

June 1, 2010

Hi, when embedding python 3.1, I have my own free-method in tp_dealloc. The allocated memory is in host-memory, not in python (dll). Now, the problem is, Python appears to read-access the deallocated memory still after tp_dealloc. After tp_dealloc, I get an access violation if the pyobject-header fields have been modified inside tp_dealloc. If I leave the header unmodified, then no access violation occurs. Accessing deallocated memory sounds like a bug, or is this intended design? Thank you Marvin -- GRATIS für alle GMX-Mitglieder: Die maxdome Movie-FLAT! Jetzt freischalten unter http://portal.gmx.net/de/go/maxdome01

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