Mailman 3 April 2010 - Python-Dev

python compiler
by willian＠ufpa.br 06 Apr '10

06 Apr '10

for a college project, I proposed to create a compiler for python. I've read something about it and maybe I saw that made a bad choice. I hear everyone's opinion respond.

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nonlocals() function?
by average 05 Apr '10

05 Apr '10

On Sat, Apr 3, 2010 at 6:31 AM, Nick Coghlan <ncoghlan(a)gmail.com> wrote: > Steve Bonner wrote: >> What do we think of adding a built-in nonlocals() function that would >> be similar to globals() and locals()? Like those functions, it would >> return a dictionary of variable names and their values. Since we now >> have the nonlocal statement, it would be consistent to keep the >> three scopes local/nonlocal/global with parallel capabilities. And it >> might sometimes be useful for code inside a nested function to see >> what variables are available at the enclosing level. > > That isn't as easy as it may sound. locals() and globals() are each > single namespaces, while the nonlocals may actually span multiple > namespaces. This is probably is way off, but why not use sets. It seems that these special "functions" (which actually don't do any transformations) should be properties or attributes, and in any case would be better served by returning (holding) sets, then one could do standard set operations on them (including the set difference operations upon the set named "locals"). These old functions predate the introductions of attributes/properties and sets, and like anything that is sure to be a group containing no duplicates, it should really return a set to remove the ambiguity to the programmer (unlike returning a list as is presently). That includes dir() too and probably others. python3k-to-you-toly yours, marcos

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Odd lines in unicodedata_db.h
by MRAB 04 Apr '10

04 Apr '10

I've just downloaded the daily snapshot at http://svn.python.org/snapshots/python.tar.bz2 In the header file /python/Modules/unicodedata_db.h, there are the following lines in the change_records_3_2_0 struct: { 255, 255, 255, 255, 1.0 }, { 255, 255, 255, 255, 2.0 }, { 255, 255, 255, 255, 3.0 }, { 255, 255, 255, 255, 4.0 }, ... { 255, 255, 255, 255, 1e+16 }, { 255, 255, 255, 255, 1e+20 }, Looks like a bug to me.

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delaying 2.7 beta 1
by Benjamin Peterson 04 Apr '10

04 Apr '10

I am delaying the release of 2.7 beta 1 pending the fixing of http://bugs.python.org/issue8108 and the greening of the buildbots. -- Regards, Benjamin

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Proposing PEP 376
by Tarek Ziadé 03 Apr '10

03 Apr '10

Hello, On behalf of the distutils-SIG, I'd like to propose PEP 376 for inclusion. This PEP is about defining a standard for installed Python projects. http://www.python.org/dev/peps/pep-0376/ It was created : - to allow interoperability among all package managers. - to provide a set of APIs in the stdlib to know what's installed (in pkgutil) - to provide a basic *uninstaller* feature in the distutils2 project. It is very similar to the retired PEP 262, but closer to the standard the Setuptools project have created, which is quite used in the community. Calendar-wise, I'd love to see it accepted for 2.7 but it might be too late to finish discussing it (2.7b1 is due in a few days). So I guess the next target will be Python 3.2. One topic has been ignored on purpose in this PEP : how to describe in a detailed way the resources file a project contains, and how they should be installed on a FHS-compliant system (like, a configuration file should go in /etc and such things) We are currently focusing our discussion efforts on the resource files (see the summary work so far here : http://hg.python.org/distutils2/file/tip/docs/design/wiki.rst) and we will produce another PEP for that, that will not interfer with PEP 376. Regards Tarek -- Tarek Ziadé | http://ziade.org

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5 : 1
by anatoly techtonik 02 Apr '10

02 Apr '10

I reviewed 5 issues and want to see http://bugs.python.org/issue7585 committed to Python 2.7 http://bugs.python.org/issue7443 test.support.unlink issue on Windows platform i race condition between os.unlink(), TortoiseSVN and os.open() - reporter changed OS and can't confirm bug anymore, need somebody with Windows and TortoiseSVN installed http://bugs.python.org/issue6703 cross platform failure and silly test in doctest i non-crossplatform check for absolute path when 'module_relative' is True - added patch - need testcases http://bugs.python.org/issue1659 Tests needing network flag? i skip tests that require network if network is not available - added patch - it is recommended to split issue to count skipped tests exactly and to probe which tests marked as 'require network' are actually don't http://bugs.python.org/issue2810 _winreg.EnumValue fails when the registry data includes multibyte unicode characters i WindowsError: [Error 234] More data is available when working with _winreg - original issue assumed that it is caused by multibyte string, however this can not be confirmed anymore - exception can be thrown when operating over long keys, this should be tested with WinAPI over ctypes, I propose to open new bug for long keys - another bug could be opened - it seems impossible to get values of Unicode keys with _winreg http://bugs.python.org/issue3778 python uninstaller leave registry entries - confirmed for 2.6.5 - need windows installer expert to create patch for cleaning empty registry keys -- anatoly t.

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[buildbots] 'stop build' button causing subsequent builds to fail?
by Stefan Krah 02 Apr '10

02 Apr '10

Hi, I looks like the 'stop build' button can a) cause subsequent builds to fail and b) cause pending builds to be deleted from the queue. a) http://www.python.org/dev/buildbot/builders/ARM Linux EABI 3.x/builds/18 was apparently interrupted by a 'stop build' for a previous build. b) I stopped http://www.python.org/dev/buildbot/builders/sparc solaris10 gcc 3.x/builds/558 and a pending build vanished (I'm certain that I used 'stop build' and not 'cancel all'). Is this a known issue? Stefan Krah

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Re: [Python-Dev] Mixing float and Decimal -- thread reboot
by Greg Ewing 02 Apr '10

02 Apr '10

Raymond Hettinger wrote: > Since decimal also allows arbitrary sizes, all long ints can be > exactly represented (this was even one of the design goals > for the decimal module). There may be something we need to clarify here. I've been imagining that the implicit conversions to Decimal that we're talking about would be done to whatever precision is set in the context. Am I wrong about that? Is the intention to always use enough digits to get an exact representation? -- Greg

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Summary of Python tracker Issues
by Python tracker 02 Apr '10

02 Apr '10

ACTIVITY SUMMARY (2010-03-26 - 2010-04-02) 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. 2629 open (+37) / 17481 closed (+13) / 20110 total (+50) Open issues with patches: 1063 Average duration of open issues: 727 days. Median duration of open issues: 486 days. Open Issues Breakdown open 2590 (+37) languishing 5 ( +0) pending 33 ( +0) Issues Created Or Reopened (51) _______________________________ multiprocessing.Queue() blocks program 2010-03-26 http://bugs.python.org/issue8237 reopened eua py2_test_grammar.py contains invalid syntax for 2.6 2010-03-27 http://bugs.python.org/issue8241 created gagenellina Support surrogates in import ; install Python in a non-ASCII d 2010-03-27 http://bugs.python.org/issue8242 created haypo patch curses writing to window's bottom right position raises: `_cur 2010-03-27 http://bugs.python.org/issue8243 created theosp Remove obsolete update.sh in PEPs repo 2010-03-27 CLOSED http://bugs.python.org/issue8244 created merwok email examples don't actually work (SMTP.connect is not called 2010-03-27 http://bugs.python.org/issue8245 created jaraco test_signal in test_subprocess displays traceback 2010-03-27 CLOSED http://bugs.python.org/issue8246 created pitrou Can't Import Tkinter 2010-03-28 http://bugs.python.org/issue8247 created SevenThunders Add test cases for bool 2010-03-28 CLOSED http://bugs.python.org/issue8248 created gnofi patch expat.ParserCreate - SystemError bad argument to internal func 2010-03-28 http://bugs.python.org/issue8249 created flox Implement pkgutil APIs as described in PEP 376 2010-03-28 http://bugs.python.org/issue8250 created tarek WeakRefSet 2010-03-28 CLOSED http://bugs.python.org/issue8251 created michael.foord add a metadata section in setup.cfg 2010-03-28 http://bugs.python.org/issue8252 created tarek add a resource+files section in setup.cfg 2010-03-28 http://bugs.python.org/issue8253 created tarek write a configure command 2010-03-28 http://bugs.python.org/issue8254 created tarek step-by-step tutorial 2010-03-28 http://bugs.python.org/issue8255 created tarek TypeError: bad argument type for built-in operation 2010-03-28 http://bugs.python.org/issue8256 created dangyogi patch Decimal constructor to accept float 2010-03-28 http://bugs.python.org/issue8257 created rhettinger patch, easy Multiple Python Interpreter Memory Leak 2010-03-29 http://bugs.python.org/issue8258 created ewillie007 left shift operator doesn't accepts long as second argument 2010-03-29 http://bugs.python.org/issue8259 created owirj When I use codecs.open(...) and f.readline() follow up by f.re 2010-03-29 http://bugs.python.org/issue8260 created harobed patch License link for Python 2.6.5 release is broken 2010-03-29 CLOSED http://bugs.python.org/issue8261 created silverjam bad wording in error message attempting to start a Thread twic 2010-03-30 http://bugs.python.org/issue8262 created gagenellina patch regrtest stops prematurately on FreeBSD buildbot, with "succes 2010-03-30 http://bugs.python.org/issue8263 created flox patch, buildbot hasattr doensn't show private (double underscore) attributes e 2010-03-30 http://bugs.python.org/issue8264 created ncw test_float fails on ARM Linux EABI with soft floating point 2010-03-30 http://bugs.python.org/issue8265 created flox buildbot tarfile library should support xz compression 2010-03-30 CLOSED http://bugs.python.org/issue8266 created thedjatclubrock Tutorial section on dictionary keys recommends sort instead of 2010-03-30 http://bugs.python.org/issue8267 created kent patch Make old-style classes weak referenceable 2010-03-30 CLOSED http://bugs.python.org/issue8268 created pitrou patch Missing return values for PyUnicode C/API functions 2010-03-30 http://bugs.python.org/issue8269 created arnau Should socket.PF_PACKET be removed, in favor of socket.AF_PACK 2010-03-31 http://bugs.python.org/issue8270 created denilsonsa str.decode('utf8', 'replace') -- conformance with Unicode 5.2. 2010-03-31 http://bugs.python.org/issue8271 created sjmachin patch Odd exception messages when using cStringIO.StringIO instances 2010-03-31 CLOSED http://bugs.python.org/issue8272 created workshed move test_support into the unittest package 2010-03-31 http://bugs.python.org/issue8273 created tarek test_run failing 2010-03-31 http://bugs.python.org/issue8274 created zubin71 callback function on win64 results in bad behavior. mem corrup 2010-03-31 http://bugs.python.org/issue8275 created ocrush useless PyEval_CallObject function 2010-03-31 CLOSED http://bugs.python.org/issue8276 created fijal ElementTree won't parse comments 2010-04-01 http://bugs.python.org/issue8277 created poke os.utime doesn't allow a atime (Last Access) which is 27 years 2010-04-01 http://bugs.python.org/issue8278 created ramson patch python-gdb PyListTests fail 2010-04-01 http://bugs.python.org/issue8279 created loewis patch urllib2 passes fragment identifier to server 2010-04-01 http://bugs.python.org/issue8280 created naoki test_gdb_sample fails 2010-04-01 CLOSED http://bugs.python.org/issue8281 created pitrou buildbot Windows uninstaller requests admin access for unindentified pr 2010-04-01 CLOSED http://bugs.python.org/issue8282 created techtonik series of lamdas in loop sets the paramater on all calls to th 2010-04-01 CLOSED http://bugs.python.org/issue8283 created alan.hoover urlparse incorrect parse 2010-04-01 CLOSED http://bugs.python.org/issue8284 created OMFGROFLMAO IDLE not smart indenting correctly in nested statements 2010-04-01 http://bugs.python.org/issue8285 created Tofystedeth distutils: path '[...]' cannot end with '/' 2010-04-02 http://bugs.python.org/issue8286 created srid python-gdb.py triggers compile errors on FreeBSD and Solaris 2010-04-02 http://bugs.python.org/issue8287 created flox patch, buildbot zipfile module documentation misprint 2010-04-02 http://bugs.python.org/issue8288 created matpuk multiprocessing.Process.__init__ pickles all arguments 2010-04-02 http://bugs.python.org/issue8289 created cool-RR I HAVE A PROBLEM WITH PYTHON 2010-04-02 http://bugs.python.org/issue8290 created krishnalolla Issues Now Closed (42) ______________________ tarfile insecure pathname extraction 947 days http://bugs.python.org/issue1044 doko patch Remove cmp parameter to list.sort() and builtin.sorted() 813 days http://bugs.python.org/issue1771 r.david.murray os.fstat and other os.f* methods should use PyObject_AsFileDes 697 days http://bugs.python.org/issue2768 georg.brandl patch, easy inspect.getcallargs() 650 days http://bugs.python.org/issue3135 benjamin.peterson patch py3k shouldn't use -fno-strict-aliasing anymore 629 days http://bugs.python.org/issue3326 benjamin.peterson patch ElementPath.Path.findall problem with unicode input 620 days http://bugs.python.org/issue3409 flox patch distutils: -3 warnings (apply) 480 days http://bugs.python.org/issue4577 flox patch Issue with RotatingFileHandler logging handler on Windows 292 days http://bugs.python.org/issue4749 vinay.sajip subprocess.Popen.communicate does not encode unicode strings 408 days http://bugs.python.org/issue5290 flox future unicode literals and r'\u' 389 days http://bugs.python.org/issue5447 flox patch Windows install error when choosing to compile .py files 221 days http://bugs.python.org/issue6716 gagenellina Tkinter sets an unicode environment variable on win32 195 days http://bugs.python.org/issue6906 flox patch, needs review, buildbot What is a Unicode line break character? 83 days http://bugs.python.org/issue7643 flox patch Revise generator-related Glossary entries 37 days http://bugs.python.org/issue8012 georg.brandl patch Add gdb7 hooks to make it easier to debug Python 32 days http://bugs.python.org/issue8032 doko patch Fail-fast behavior for unittest 22 days http://bugs.python.org/issue8074 michael.foord urllib.unquote doesn't decode mixed-case percent escapes 15 days http://bugs.python.org/issue8135 orsenthil patch test_pep277 fails on OS X 5 days http://bugs.python.org/issue8207 flox patch OptionParser keyword arg 'epilog' not mentioned in the docs 6 days http://bugs.python.org/issue8209 orsenthil Python 3 ignored PYTHONUNBUFFERED and -u 10 days http://bugs.python.org/issue8213 georg.brandl enabling SSL_MODE_AUTO_RETRY on SSL sockets 2 days http://bugs.python.org/issue8222 pitrou Wrong link in xml.etree documentation 7 days http://bugs.python.org/issue8225 brian.curtin patch extend py_compile to compile files from stdin 6 days http://bugs.python.org/issue8233 barry patch Spelling and text in howto/webservers 1 days http://bugs.python.org/issue8234 ezio.melotti patch Support FreeBSD's SO_SETFIB in socketmodule.c 8 days http://bugs.python.org/issue8235 larry patch ./configure: ImportError: No module named asdl (when run from 4 days http://bugs.python.org/issue8236 r.david.murray Remove obsolete update.sh in PEPs repo 0 days http://bugs.python.org/issue8244 pitrou test_signal in test_subprocess displays traceback 0 days http://bugs.python.org/issue8246 flox Add test cases for bool 3 days http://bugs.python.org/issue8248 pitrou patch WeakRefSet 0 days http://bugs.python.org/issue8251 michael.foord License link for Python 2.6.5 release is broken 4 days http://bugs.python.org/issue8261 georg.brandl tarfile library should support xz compression 0 days http://bugs.python.org/issue8266 brian.curtin Make old-style classes weak referenceable 1 days http://bugs.python.org/issue8268 pitrou patch Odd exception messages when using cStringIO.StringIO instances 0 days http://bugs.python.org/issue8272 eric.smith useless PyEval_CallObject function 1 days http://bugs.python.org/issue8276 pitrou test_gdb_sample fails 0 days http://bugs.python.org/issue8281 pitrou buildbot Windows uninstaller requests admin access for unindentified pr 0 days http://bugs.python.org/issue8282 loewis series of lamdas in loop sets the paramater on all calls to th 0 days http://bugs.python.org/issue8283 benjamin.peterson urlparse incorrect parse 0 days http://bugs.python.org/issue8284 georg.brandl Generate from Unicode database instead of manualy coding. 1400 days http://bugs.python.org/issue1498930 flox patch str.split creates new string even if pattern not found 1207 days http://bugs.python.org/issue1613130 flox object.__init__ shouldn't allow args/kwds 1110 days http://bugs.python.org/issue1683368 tjreedy Top Issues Most Discussed (10) ______________________________ 23 test_zlib fails with zlib 1.2.4 12 days open http://bugs.python.org/issue8193 20 str.decode('utf8', 'replace') -- conformance with Unicode 5.2.0 3 days open http://bugs.python.org/issue8271 17 move test_support into the unittest package 2 days open http://bugs.python.org/issue8273 15 Fix typos and phrasing in the Web servers howto 10 days open http://bugs.python.org/issue8218 13 ssl.SSLSocket.write may fail on non-blocking sockets 7 days open http://bugs.python.org/issue8240 11 ABC caches should use weak refs 732 days open http://bugs.python.org/issue2521 11 os.kill on windows 1753 days open http://bugs.python.org/issue1220212 8 TypeError: bad argument type for built-in operation 5 days open http://bugs.python.org/issue8256 8 python uninstaller leave registry entries 575 days open http://bugs.python.org/issue3778 6 urlparse incorrect parse 0 days closed http://bugs.python.org/issue8284

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copying of itertools iterators
by Andrew Svetlov 01 Apr '10

01 Apr '10

using of copy.copy for simple iterators is forbidden >>> import copy >>> copy.copy(iter([1, 2, 3])) Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/home/andrew/projects/py3k/Lib/copy.py", line 96, in copy return _reconstruct(x, rv, 0) File "/home/andrew/projects/py3k/Lib/copy.py", line 284, in _reconstruct y = callable(*args) File "/home/andrew/projects/py3k/Lib/copyreg.py", line 88, in __newobj__ return cls.__new__(cls, *args) TypeError: object.__new__(list_iterator) is not safe, use list_iterator.__new__() That behavior is safe and clean. But it's possible to copy iterator objects returned by itertools functions: >>> i = itertools.chain([1, 2], [3, 4, 5]) >>> i.__next__() 1 >>> j = copy.copy(i) >>> j.__next__() Traceback (most recent call last): File "<stdin>", line 1, in <module> StopIteration >>> i.__next__() 2 Looks like itertools object should be protected from usage like that. Folks, what are you think about?

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