Mailman 3 February 2007 - Python-Dev

Bundling decimal.py with Django
by Andrew Durdin Feb. 22, 2007

Feb. 22, 2007

Apologies if this is a little off-topic for python-dev, but it seemed like the best place to ask and get the attention of those needed. I am championing a patch to improve Django's support for numeric types by using Decimals with numeric columns and floats with double precision columns, rather than the current rather unpredictable behaviour (which depends on the particular python version and database backend being used). It has been proposed[1] to include decimal.py from the Python 2.5 distribution with Django, to ensure consistent and compatible behaviour between Python 2.3 and Python >= 2.4[2]. Jacob Kaplan-Moss wrote in response to this proposal """ In order for this to be accepted, we need to know: * What is the license for the decimal module, and is said license compatible with the BSD license that Django uses? * Are the authors of the decimal module OK with us distributing it with Django? Our policy for including third party libraries requires an answer to both those questions. We won't include anything if it's not legal to do so, and we won't include anything that the original author doesn't want included. """ I'm addressing the second of Jacob's points here; would it be acceptable if the decimal module was distributed with Django? Andrew [1] http://groups.google.com/group/django-developers/msg/230892a9f9a71472 [2] Python's _threading_local.py module is already included with Django for the same compatibility reasons.

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A Reminder : A Survey on Defect Management Practices in Free/Open Source Software
by Anu Gupta DCSA Feb. 22, 2007

Feb. 22, 2007

Sir/Madam I seek help from designers, developers, testers,defect fixers,project managers or playing any other key role in Free/Open Source software development or maintenence in carrying out a study to identify practices and problems of defect management in various Free/Open Source Software projects. The insights gained from the study can further help us to extract publicly accessible defect data and determine impact of defect management practices on software quality. Please spend a few minutes of your precious time to fill up the Questionnaire. The most of the questions follow multiple choice formats and are quite easy to answer. To have the Online Questionnaire, please visit: http://anu.puchd.ac.in/phpESP/public/survey.php?name=FOSS_Defect_Survey (You can also copy and paste this link into your browser, and hit the 'Return' key.) I hope you will find all the questions interesting and thought-provoking. Your answers will be kept anonymous.The data thus collected will only be used for research purpose.It would be nice if you may further refer this mail to others actively engaged with Free/Open Source Software development. If you have any query or suggestions then feel free to contact. Thank You With regards, Anu Gupta Senior Lecturer Department of Computer Science and Applications, Panjab University, Chandigarh. INDIA In case of any problem in accessing/using the above mentioned link please contact: E-mail: anugupta(a)pu.ac.in anugupta98(a)gmail.com

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Weekly Python Patch/Bug Summary
by Kurt B. Kaiser Feb. 22, 2007

Feb. 22, 2007

Patch / Bug Summary ___________________ Patches : 408 open ( -9) / 3585 closed (+20) / 3993 total (+11) Bugs : 968 open ( +8) / 6505 closed ( +7) / 7473 total (+15) RFE : 267 open ( +1) / 251 closed ( +0) / 518 total ( +1) New / Reopened Patches ______________________ Handle requests to intern string subtype instances (2007-02-13) http://python.org/sf/1658799 opened by Hrvoje Nik?i? Minor pasting patch (2007-02-13) http://python.org/sf/1659326 opened by Tal Einat Minor AST tweaks (2007-02-13) http://python.org/sf/1659410 opened by Collin Winter functools.compose to chain functions together (2007-02-14) CLOSED http://python.org/sf/1660179 opened by Chris AtLee IDLE doesn't save files on closing (2007-02-15) CLOSED http://python.org/sf/1660202 opened by Toni Hide iteration variable in list comprehensions (2007-02-15) http://python.org/sf/1660500 opened by Nick Coghlan ftplib passive ftp problem on multihomed clients (2007-02-16) http://python.org/sf/1661754 opened by Tim Baum setuptools: avoid sets module for python>2.3 (2007-02-19) http://python.org/sf/1663226 opened by Amit Aronovitch enable "python -m doctest FILE" to run tests in FILE (2007-02-19) http://python.org/sf/1663234 opened by Stefan Behnel Fix for urllib.ftpwrapper.retrfile() and none existing files (2007-02-20) http://python.org/sf/1664522 opened by Phil Knirsch Patches Closed ______________ imputil must respect __path__ for package submodules (2003-02-12) http://python.org/sf/685268 closed by loewis Scalable zipfile extension (2003-09-27) http://python.org/sf/813436 closed by loewis zipfile and big zipped file (2004-07-17) http://python.org/sf/992750 closed by loewis ZipFile - support for file decryption (2003-03-06) http://python.org/sf/698833 closed by loewis Bug 1514451: zipfile "append" mode should create a file ... (2006-07-06) http://python.org/sf/1517891 closed by loewis socketmodule fails to build because missing NETLINK_DNRTMSG (2007-02-11) http://python.org/sf/1657276 closed by loewis gzip.GzipFile has no name attribute (2007-01-29) http://python.org/sf/1647484 closed by gustaebel Missing HCI sockets in bluetooth code from socketmodule (2006-02-15) http://python.org/sf/1432399 closed by loewis Patch to support lots of file descriptors (2006-02-19) http://python.org/sf/1434657 closed by loewis isapi.samples.advanced.py fix (2005-02-17) http://python.org/sf/1126187 closed by loewis Add IEEE Float support to wave.py (2005-02-19) http://python.org/sf/1144504 closed by loewis Make urllib2.OpenerDirector instances pickle-able (2005-02-20) http://python.org/sf/1144636 closed by jjlee functools.compose to chain functions together (2007-02-15) http://python.org/sf/1660179 closed by loewis IDLE doesn't save files on closing (2007-02-15) http://python.org/sf/1660202 closed by gbrandl decorator module (2006-03-12) http://python.org/sf/1448297 closed by gbrandl dictnotes.txt (2006-01-05) http://python.org/sf/1397848 closed by loewis Documentation for new Struct object (2006-05-24) http://python.org/sf/1494140 closed by gbrandl Detect incomplete readline implementation (2006-02-21) http://python.org/sf/1435651 closed by loewis add os.chflags() and os.lchflags() where available (2006-05-17) http://python.org/sf/1490190 closed by loewis Fix for bug #1486663 mutable types check kwargs in tp_new (2006-05-20) http://python.org/sf/1491939 closed by zseil New / Reopened Bugs ___________________ I think, I have found this bug on time.mktime() (2007-02-10) CLOSED http://python.org/sf/1656559 reopened by sergiomb This shouldn't be there: Note that this code that uses... (2007-02-13) CLOSED http://python.org/sf/1658794 opened by Alf Lervåg os.wait child process fail when under stress (2007-02-13) http://python.org/sf/1658959 opened by The Groff Calling tparm from extension lib fails in Python 2.4 (2007-02-13) http://python.org/sf/1659171 opened by Richard B. Kreckel Calling tparm from extension lib fails in Python 2.4 (2007-02-13) CLOSED http://python.org/sf/1659173 opened by Richard B. Kreckel Python extension problems after re-install (2007-02-14) http://python.org/sf/1659705 opened by elf continuing problem with httplib multiple set-cookie headers (2007-02-14) http://python.org/sf/1660009 opened by David Margrave base64.urlsafe_b64encode() shouldn't use the = character (2007-02-16) http://python.org/sf/1661108 opened by Ryan Barrett Misleading behavior for [] and {} default arguments (2007-02-16) CLOSED http://python.org/sf/1661603 opened by Matthijs finditer stuck in infinite loop (2007-02-16) http://python.org/sf/1661745 opened by Milan [2.5 regression?] failure to import the ORBit extension (2007-02-17) http://python.org/sf/1662529 opened by Matthias Klose the re module can perform poorly: O(2**n) versus O(n**2) (2007-02-17) http://python.org/sf/1662581 opened by Gregory P. Smith Over-zealous keyword-arguments check for built-in set class (2006-05-11) CLOSED http://python.org/sf/1486663 reopened by rhettinger subprocess/popen close_fds perform poor if SC_OPEN_MAX is hi (2007-02-19) http://python.org/sf/1663329 opened by H. von Bargen PyType_IsSubtype segfaults (2007-02-19) http://python.org/sf/1663392 opened by navtej singh crash in exec statement if uncode filename cannot be decoded (2007-02-21) http://python.org/sf/1664966 opened by Stefan Schukat Hangup when using cgitb in a thread while still in import (2007-02-21) http://python.org/sf/1665206 opened by hoffie Documentation missing for OptionGroup class in optparse (2007-02-21) http://python.org/sf/1665333 opened by LunarYorn Bugs Closed ___________ I think, I have found this bug on time.mktime() (2007-02-10) http://python.org/sf/1656559 closed by loewis I think, I have found this bug on time.mktime() (2007-02-10) http://python.org/sf/1656559 closed by loewis zipfile "append" mode should create a file if not present (2006-06-29) http://python.org/sf/1514451 closed by loewis This shouldn't be there: Note that this code that uses... (2007-02-13) http://python.org/sf/1658794 closed by loewis Calling tparm from extension lib fails in Python 2.4 (2007-02-13) http://python.org/sf/1659173 closed by gbrandl Misleading behavior for [] and {} default arguments (2007-02-16) http://python.org/sf/1661603 closed by gbrandl logging formatter %(lineno)d does not work (2007-02-05) http://python.org/sf/1652788 closed by vsajip Over-zealous keyword-arguments check for built-in set class (2006-05-11) http://python.org/sf/1486663 closed by rhettinger Double free/corruption? (2007-02-06) http://python.org/sf/1653121 closed by sf-robot New / Reopened RFE __________________ Datetime enhancements (2007-02-21) http://python.org/sf/1665292 opened by Christian Heimes

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Re: [Python-Dev] Welcome to the "Python-Dev" mailing list
by Juan Carlos Suarez Feb. 21, 2007

Feb. 21, 2007

Good morning, thanks a lot for your answer, I confirmed by this means my subscription. What I really wish and need is to be able to use Mailman as a freely distributer , as a distributer of my own mailing lists ,as a mailing list manager , to be able to send my mails by Mailman and to be able to open my own mail address. How should I do this. I need your instructions and help. I'm waiting for your answer soon Thanks, my regards, Juan Carlos Suarez You wrote: Welcome to the Python-Dev(a)python.org mailing list! If you are a new subscriber, please take the time to introduce yourself briefly in your first post. It is appreciated if you lurk around for a while before posting! :-) Additional information on Python's development process can be found in the Python Developer's Guide: http://www.python.org/dev/ To post to this list, send your email to: python-dev(a)python.org General information about the mailing list is at: http://mail.python.org/mailman/listinfo/python-dev If you ever want to unsubscribe or change your options (eg, switch to or from digest mode, change your password, etc.), visit your subscription page at: http://mail.python.org/mailman/options/python-dev/juancarlosuarez%40ciudad.… You can also make such adjustments via email by sending a message to: Python-Dev-request(a)python.org with the word `help' in the subject or body (don't include the quotes), and you will get back a message with instructions. You must know your password to change your options (including changing the password, itself) or to unsubscribe. It is: casandra07 Normally, Mailman will remind you of your python.org mailing list passwords once every month, although you can disable this if you prefer. This reminder will also include instructions on how to unsubscribe or change your account options. There is also a button on your options page that will email your current password to you.

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Py_ssize_t
by Raymond Hettinger Feb. 21, 2007

Feb. 21, 2007

After thinking more about Py_ssize_t, I'm surprised that we're not hearing about 64 bit users having a couple of major problems. If I'm understanding what was done for dictionaries, the hash table can grow larger than the range of hash values. Accordingly, I would expect large dictionaries to have an unacceptably large number of collisions. OTOH, we haven't heard a single complaint, so perhaps my understanding is off. The other area where I expected to hear wailing and gnashing of teeth is users compiling with third-party extensions that haven't been updated to a Py_ssize_t API and still use longs. I would have expected some instability due to the size mismatches in function signatures -- the difference would only show-up with giant sized data structures -- the bigger they are, the harder they fall. OTOH, there have not been any compliants either -- I would have expected someone to submit a patch to pyport.h that allowed a #define to force Py_ssize_t back to a long so that the poster could make a reliable build that included non-updated third-party extensions. In the absence of a bug report, it's hard to know whether there is a real problem. Have all major third-party extensions adopted Py_ssize_t or is some divine force helping unconverted extensions work with converted Python code? Maybe the datasets just haven't gotten big enough yet. Raymond

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NamedTuple (was: Py2.6 ideas)
by python＠rcn.com Feb. 20, 2007

Feb. 20, 2007

[Raymond Hettinger] > The constructor signature ... Point(*fetchall(s)), > and it allows for direct construction with Point(2,3) without > the slower and weirder form: Point((2,3)). [Jim Jewett] >> If you were starting from scratch, I would agree >> whole-heartedly; this is one of my most frequent >> mistakes.The question is whether it makes sense to >> "fix" NamedTuple without also fixing regular tuple, list, Yes. Tuples and lists both have syntactic support for direct construction and NamedTuples aspire to that functionality: vec = (dx*3.0, dy*dx/dz, dz) # Regular tuple vec = Vector(dx*3.0, dy*dx/dz, dz) # Named tuple I've worked with the current version of the recipe for a long time and after a while the wisdom of the signature becomes self-evident. We REALLY don't want: vec = Vector((dx*3.0, dy*dx/dz, dz)) # yuck For conversion from other iterables, it is REALLY easy to write: vec = Vector(*partial_derivatives) Remember, list() and tuple() are typically used as casts, not as direct constructors. How often do you write: dlist = list((dx*3.0, dy*dx/dz, dz)) That is usually written: dlist = [dx*3.0, dy*dx/dz, dz] I think the Vec((dx, dy, dz)) sysntax falls into the category of foolish consistency. Raymond

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NamedTuple (was: Py2.6 ideas)
by Jim Jewett Feb. 20, 2007

Feb. 20, 2007

Raymond Hettinger explained: > The constructor signature ... Point(*fetchall(s)), > and it allows for direct construction with Point(2,3) without the > slower and weirder form: Point((2,3)). If you were starting from scratch, I would agree whole-heartedly; this is one of my most frequent mistakes. The question is whether it makes sense to "fix" NamedTuple without also fixing regular tuple, list, set, etc. Assuming this goes to collections rather than builtins, would it be reasonable to include both versions? > Also, the current signature > works better with keyword arguments: Point(x=2, y=3) or > Point(2, y=3) which wouldn't be common but would be > consistent with the relationship between keyword arguments > and positional arguments in other parts of the language. Yes and no. One important trait of (pre 2.6) keyword arguments is that they have defaults. When I'm using a record format that someone else defined, it is pretty common for large portions of most records to be essentially wasted. It would be nice if I could create a record by just specifying the fields that have non-default values. I can do this with a data class (since attribute lookup falls back to the class), but not with this tuple factory. > The string form for the named tuple factory was arrived at > because it was easier to write, read, and alter than its original > form with a list of strings: > Contract = namedtuple('Contract stock strike volatility expiration rate iscall') > vs. > Contract = namedtuple('Contract', 'stock', 'strike', 'volatility', > 'expiration', 'rate', 'iscall') The type name is somehow different. Do either of these affect your decision? # separate arguments for type name and field names Contract = namedtuple('Contract', "stock strike volatility expiration rate iscall") # no explicit assignment, and bad hackery to get it namedtuple('Contract', "stock strike volatility expiration rate iscall") -jJ

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Wrapping up 'dynamic attribute' discussion
by Ben North Feb. 19, 2007

Feb. 19, 2007

I wrote: > I've sent an updated version of PEP 363 to the editors, which > includes the following summary of the discussion. I hope I've > captured the important points, but please let me know if there's > something important I've left out or misrepresented. There were a couple of points made off-list, which I've incorporated. The final version of the PEP is now with the editors. Ben.

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A Survey on Defect Management Practices in Free/Open Source Software
by Anu Gupta DCSA Feb. 19, 2007

Feb. 19, 2007

Hi Python developers I seek help from designers, developers, testers,defect fixers,project managers or playing any other key role in Free/Open Source software development or maintenence in carrying out a study to identify practices and problems of defect management in various Free/Open Source Software projects. The insights gained from the study can further help us to extract publicly accessible defect data and determine impact of defect management practices on software quality. Please spend a few minutes of your precious time to fill up the Questionnaire. The most of the questions follow multiple choice formats and are quite easy to answer. To have the Online Questionnaire, please visit: http://anu.puchd.ac.in/phpESP/public/survey.php?name=FOSS_Defect_Survey (You can also copy and paste this link into your browser, and hit the 'Return' key.) I hope you will find all the questions interesting and thought-provoking. Your answers will be kept anonymous.The data thus collected will only be used for research purpose.It would be nice if you may further refer this mail to others actively engaged with Free/Open Source Software development. If you have any query or suggestions then feel free to contact. Thank You With regards, Anu Gupta Senior Lecturer Department of Computer Science and Applications, Panjab University, Chandigarh. INDIA In case of any problem in accessing/using the above mentioned link please contact: E-mail: anugupta(a)pu.ac.in anugupta98(a)gmail.com

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Re: [Python-Dev] urllib2 EP + decr. startup time
by Phillip J. Eby Feb. 18, 2007

Feb. 18, 2007

At 01:25 PM 2/17/2007 +0200, KoDer wrote: >C:\\Python25\\lib\\. contain *many* packages with .dll files - i can't >just zip it. >wxPython,pyOpenGL,PIL,tk and so on. On Fedora 6 more than 40% dirs of >/usr/lib/site-packages contained .so files. Some of them add dirs to path >(wx,PIL,Gtk,...). I'm not talking about the subdirectories under lib, just lib itself. That is, the Python standard library. Stdlib DLLs are in a separate subdirectory ('DLLs' on Windows, 'lib-dynload' most other places). >Are setuptools can work properly with packages packed in one big zip archive >(i really don't known)? I don't follow you; this has nothing to do with setuptools. It's a feature of Python since version 2.3, but as far as I know nobody's ever set up the build machinery to create the necessary zipfile when Python is installed. Perhaps that would be a nice place to begin your patch: a script to create a stdlib zipfile in the platform-appropriate location, that can run after the bytecode compilation of the stdlib modules, or that users can run on older versions of Python to do the same thing.

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