🌐 Mailman 3 July 2011 - Python-list - python.org

Installing Python Apps on Mac Lion
by JKPeck March 13, 2012

March 13, 2012

The Lion version of the OS on the Mac comes with Python 2.7 installed, but it is in /System/Library/Frameworks/..., and this area is not writable by third party apps. So is there a consensus on what apps that typically install under the Python site-packages directory should do in this situation? Installing Python from python.org puts it in the writable area /Library/Frameworks/Python.framework. So, what should a Python app installer do? Thanks

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A 'Python like' language
by Peter Hickman March 3, 2012

March 3, 2012

Well after all this discussion it would appear that a 'Python like' language has appeared => Prothon. http://www.prothon.org/index.html Very alpha, sort of like Python (if you consider the indenting is what makes Python unique) and sort of Ruby in its use of prefixes to define scoping etc (although there is no reference to this trait being borrowed from Ruby). It also quotes Self as being an influence.

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Re: SMTPHandler and Unicode
by norbert Jan. 14, 2012

Jan. 14, 2012

On 5 juil, 13:17, Chris Withers <ch...(a)simplistix.co.uk> wrote: > try MailingLogger: > > If you have unicode problems with that, I'd be interested in fixing them! Your package has the same unicode problem : import logging,logging.handlers from mailinglogger.MailingLogger import MailingLogger mailingLogger = MailingLogger(mailhost=('smtp.example.com', 25),fromaddr='toto(a)example.com',toaddrs=('toto(a)example.com',)) LOG = logging.getLogger() LOG.addHandler(mailingLogger) LOG.error(u"sans accent") LOG.error(u"accentu\u00E9") --> UnicodeEncodeError: 'ascii' codec can't encode character u'\xe9' in position 7: ordinal not in range(128)

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executable builder
by King Dec. 12, 2011

Dec. 12, 2011

Hi, I am trying to build python a cross platform python executable builder to deploy python app. I tried various tools such as py2exe, pyinstaller, cx_freeze but some how they are not upto the mark except py2exe. Unfortunately py2exe is working only on windows based systems. The task is divide into 3 steps: 1. Collect all the modules(.pyo, .pyd, .dll, etc) required for your project. 2. set up temporary environment for python 3. run main.py using :python.exe main.py Initially I won't be creating an executable using main.py. I would be using shell scripting to execute the main.py. Q1. Which is most efficient way to fine all the modules required by your "main.py". Q2. For example, I have copied all the modules in "d:\project\lib\*.*" python.exe, python.dll, ms*.dll, main.py are copied to "d: \project". Before executing "python.exe main.py", I have to set up an environment var and point it to "d:\project\lib", so that python.exe can find the path for searching/loading modules. How do I do that? Q3. How do you convert your "main.py" into an executable? Prashant

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AIX installation can't find zlib
by Larry Whitley Nov. 3, 2011

Nov. 3, 2011

I've just installed the 1.5.2 source distribution on an AIX system and when I say "import zlib" it responds: >>> import zlib Traceback (innermost last): File "<stdin>", line 1, in ? ImportError: No module named zlib >>> I'm not sure where zlib is supposed to be. It's not in the Lib subdirectory of Python-1.5.2. In the Modules subdirectory I find zlibmodule.c. Nothing germaine in the Objects subdirectory. Looked at config.log and config.status, no mention of zlib. Looking at the sys.path I see: .../ldw/Python-1.5.2> python Python 1.5.2 (#1, Jul 26 2000, 14:21:56) [C] on aix4 Copyright 1991-1995 Stichting Mathematisch Centrum, Amsterdam >>> import sys >>> sys.path ['', '/.../rchland.ibm.com/fs/u1/ldw/Projects/Programs/wtCache', '/.../rchland.ibm.com/fs/u1/ldw/Python-1.5.2/Lib/', '/.../rchland.ibm.com/fs/u1/ldw/Python-1.5.2/Lib/plat-aix4', '/.../rchland.ibm.com/fs/u1/ldw/Python-1.5.2/Lib/lib-tk', '/.../rchland.ibm.com/fs/u1/ldw/Python-1.5.2/Modules'] >>> Any suggestions? Larry

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Re: GUIs - A Modest Proposal
by Jeff Hobbs Oct. 8, 2011

Oct. 8, 2011

On Jun 18, 2:59 pm, Ethan Furman <et...(a)stoneleaf.us> wrote: > Jeff Hobbs wrote: > > On Jun 6, 2:11 pm, rantingrick <rantingr...(a)gmail.com> wrote: > >> On Jun 6, 2:06 pm, Mark Lawrence <breamore...(a)yahoo.co.uk> wrote: > >>> On 06/06/2010 16:31, rantingrick wrote: > >>>> On Jun 5, 9:22 pm, ant<shi...(a)uklinux.net> wrote: > >>>>> I ask the group; should we try to create a new GUI for Python, with > >>>>> the following > >>>>> properties?: > >>>>> - Pythonic > >>>>> - The default GUI (so it replaces Tkinter) > >>>>> - It has the support of the majority of the Python community > >>>>> - Simple and obvious to use for simple things > >>>>> - Comprehensive, for complicated things > >>>>> - Cross-platform > >>>>> - Looks good (to be defined) > >>>>> - As small as possible in its default form > >>>> Yes i one hundred percent agree! The only problem is i am the only > >>>> one! Good luck finding others to climb into this boat. From the > >>>> beginning there has has been this really weird love-hate relationship > >>>> with Tkinter in the Python community. I myself experience this > >>>> emotional attachment every day as i wish for Tkinter to be more > >>>> "pretty" and "feature-rich" whilst at the same time loving it's > >>>> simplicity. Tkinter seems to be Python's whipping boy and nobody wants > >>>> to whip another, so we are stuck in limbo with a lobotomy. > >>>> Heres an idea though, why not expand Tkinter with some new really cool > >>>> widgets...? Hmmm...? That TIX package is a real PITA and could use a > >>>> re-write. Can you believe it took until py3.0 for Tkinter to get a > >>>> combobox :-O! Yea i know! :'-( > >>> Patches are welcome at any time. I look forward to seeing your first > >>> contribution. > >>> Kindest regards. > >>> Mark Lawrence. > >> Hello Mark, > > >> Are you maintaining Tkinter or Tix or both? There is a nagging issue > >> with Tix that needs fixing. Upon subbclassing some widgets and when > >> using the import Tix and import Tix as *. Maybe it is already fixed in > >> 3.0 (i have not checked) but we need to fix it. > > >> I am still currently rewriting Tkinter Tix and IDLE in my spare time > >> but got a bit busy lately. Anyhoo, i would really like to bring some > >> patches, upgrades, and just a general spit shining to the entire three- > >> plexx so let me know. > > > I am not a Tkinter maintainer, but I am one of the core Tk and Tix > > maintainers (having also completely revamped Tix a couple of years ago > > for better long-term stability and compatibility). If you have fixes > > that are relevant there, I can integrate them. I should note that > > much of Tix has been subsumed or replaced by better equivalents in the > > core of Tk. That said, it assumes you know and are using Tk 8.5. > > I've seen a lot of FUD on Tk in this thread, and much of it is a > > decade old perspective. Tk 8.5 does have native themed widgets (using > > Win32, Carbon or Cocoa, and X11, though also with plugins to gtk and > > qt). I'd have to explore more into Tkinter to see where anybody > > derives value from Tix in current programs. > > > In any case, the basic mantra for Tix is new development should avoid > > it, but existing development should work fine. New development should > > leverage the good work of Guilherme Polo in making the Tk 8.5 core > > themed widgets available in Tkinter. > > > Jeff > > Thanks for the info, Jeff! > > Is there a good web-site / tutorial / book / etc that you would > recommend for getting a good handle on Tk 8.5? Most of the Tk 8.5 references will be Tcl-based, but one that is cross- language is Mark Roseman's www.tkdocs.com. For books, there is John Ousterhout's main book, now in the 2nd edition, updated with Tcl/Tk 8.5 references: http://www.amazon.com/Tcl-Toolkit-2nd-John-Ousterhout/dp/032133633X To understand just the changes in Tk 8.5, you can see the wiki page that lists references for all changes: http://wiki.tcl.tk/10630 It includes 16 new widgets (many themed versions of classic widgets, but key new ones like the combobox and notebook), new canvas and text features, and more. The wiki in general has lots of how-to reference info (over 20K pages of content). The key with Tk that I've seen misunderstood in this thread is that it has lots of extensions. Those in the core community do argue about whether "important" widgets should be full core or kept as widgets (where they get their own dev cycle). There are some fantastic Tk widgets out there, like tktreectrl (http:// tktreectrl.sourceforge.net/), tktable, many in tklib (e.g. tablelist http://www.nemethi.de/tablelist/tablelist.html), and more. They can be used with any of the languages that integrate with Tk, but may not have "built-in" support (IOW, you might need some language-specific shim). Overcoming these hurdles may help reduce the pain and glum feelings people have towards Tk bound to non-Tcl languages (and is indeed one of the points addressed by Tkx). It doesn't help with doc translation (for use with other languages), so that's yet another hurdle. :-/ Jeff

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ANN: Intro+Intermediate Python course, SF, Oct 18-20
by wesley chun Sept. 27, 2011

Sept. 27, 2011

Need to get up-to-speed with Python as quickly and as in-depth as possible? Already coding Python but still have areas of uncertainty you need to fill? Then come join me, Wesley Chun, author of Prentice-Hall's bestseller "Core Python" for a comprehensive intro/intermediate course coming up this May in Northern California, then enjoy a beautiful Fall weekend afterwards in San Francisco, the beautiful city by the bay. Please pass on this note to whomever you think may be interested. I look forward to meeting you and your colleagues! Feel free to pass around the PDF flyer linked down below. Write if you have questions. Since I hate spam, I'll only send out one reminder as the date gets closer. (Comprehensive) Intro+Intermediate Python Tue-Thu, 2011 Oct 18-20, 9am-5pm Hope to meet you soon! -Wesley - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - (COMPREHENSIVE) INTRO+INTERMEDIATE PYTHON Although this course may appear to those new to Python, it is also perfect for those who have tinkered with it and want to "fill in the gaps" and/or want to get more in-depth formal training. It combines the best of both an introduction to the language as well as a "Python Internals" training course. We will immerse you in the world of Python in only a few days, showing you more than just its syntax (which you don't really need a book to learn, right?). Knowing more about how Python works under the covers, including the relationship between data objects and memory management, will make you a much more effective Python programmer coming out of the gate. 3 hands-on labs each day will help hammer the concepts home. Come find out why Google, Yahoo!, Disney, ILM/LucasFilm, VMware, NASA, Ubuntu, YouTube, and Red Hat all use Python. Users supporting or jumping to Plone, Zope, TurboGears, Pylons, Django, Google App Engine, Jython, IronPython, and Mailman will also benefit! PREVIEW 1: you will find (and can download) a video clip of a class session recorded live to get an idea of my lecture style and the interactive classroom environment (as well as sign-up) at: http://cyberwebconsulting.com PREVIEW 2: Partnering with O'Reilly and Pearson, Safari Books Online has asked me to deliver a 1-hour webcast a couple of years ago called "What is Python?". This was an online seminar based on a session that I've delivered at numerous conferences in the past. It will give you an idea of lecture style as well as an overview of the material covered in the course. info:http://www.safaribooksonline.com/events/WhatIsPython.html download (reg req'd): http://www.safaribooksonline.com/Corporate/DownloadAndResources/webcastInfo… - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - WHERE: near the San Francisco Airport (SFO/San Bruno), CA, USA WEB: http://cyberwebconsulting.com FLYER: http://cyberwebconsulting.com/flyerPP1.pdf LOCALS: easy freeway (101/280/380) with lots of parking plus public transit (BART and CalTrain) access via the San Bruno stations, easily accessible from all parts of the Bay Area VISITORS: free shuttle to/from the airport, free high-speed internet, free breakfast and regular evening receptions; fully-equipped suites See website for costs, venue info, and registration. There is a significant discounts available for full-time students, secondary teachers, and others. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - "Core Python Programming", Prentice Hall, (c)2007,2001 "Python Fundamentals", Prentice Hall, (c)2009 http://corepython.com wesley.chun : wescpy-gmail.com : @wescpy python training and technical consulting cyberweb.consulting : silicon valley, ca http://cyberwebconsulting.com

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Re: ANN: PyGUI 2.5
by Gregory Ewing Sept. 15, 2011

Sept. 15, 2011

Terry Reedy wrote: > Greg left out the most important to me: > "Now works with Python 3 on MacOSX and Windows!" I'm not making too much of that at the moment, because it *doesn't* work on Linux yet, and I've no idea how long it will be before it does. The issue is that there will apparently not be any Python 3 version of pygtk, on the grounds that gobject introspection can be used instead. Unfortunately, Gtk 3 and related libraries don't quite handle gobject introspection well enough to support PyGUI at the moment. -- Greg

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What Programing Language are the Largest Website Written In?
by Xah Lee Aug. 12, 2011

Aug. 12, 2011

maybe this will be of interest. 〈What Programing Language Are the Largest Website Written In?〉 http://xahlee.org/comp/website_lang_popularity.html --------------------------------- i don't remember how, but today i suddenly got reminded that Facebook is written in PHP. So, on the spur of the moment, i twitted: “Remember folks, the world's largest sites {Facebook, Wikipedia, “Yahoo!”, etc} are written in Pretty Home Page!” and followed with: “To Chinese friends, what's Baido, QQ, Taobao, Sina written in?” Then, this question piqued me, even i tried to not waste my time. But it overpowered me before i resisted, becuase i quickly spend 15 min to write this list (with help of Google): 1 Google ◇ Java 2 Facebook ◇ PHP 3 YouTube ◇ Python 4 Yahoo! ◇ PHP 5 blogger.com ◇ Java 6 baidu.com ◇ C/C++. perl/python/ruby 7 Wikipedia ◇ PHP 8 Windows Live live.com 9 Twitter.com ◇ Scala and Ruby? 10 QQ.com ◇ ? 11 MSN.com ◇ ? 13 LinkedIn ◇ PHP? 15 TaoBao.com ◇ ? 16 sina.com.cn ◇ ? 17 Amazon.com ◇ ? 18 WordPress.com ◇ PHP 22 eBay.com ◇ ? 23 yandex.ru (Russian) ◇ ? 24 Bing ◇ ? 27 Microsoft.com ◇ ? 28 网易 163.com ◇ ? 29 PayPal.com ◇ Java? 31 新浪微博 weibo.com ◇ ? 32 Flickr.com ◇ ? 34 mail.ru ◇ ? 35 Craiglist.org ◇ perl 36 FC2.com ◇ ? 38 Apple.com ◇ Objective J? 39 imdb.com ◇ ? 41 VKontakte.ru ◇ ? 43 搜狐网 sohu.com ◇ ? 44 Ask.com ◇ ? 45 BBC.co.uk ◇ ? 46 tumblr.com ◇ PHP 47 LiveJasmin.com (porn) ◇ ? 48 xvideos.com (porn) ◇ ? … 56 土豆网 Todou.com ◇ ? 81 YouPorn.com ◇ ? StumbleUpon.com ◇ PHP, Perl, C++ … the numbers is site ranking, from alexa.com. (missing ones are mostly duplicates, such as google japan, google india, etc.) i think notable interest is that twitter stands out, with Scala and Ruby. Those with perl are probably going back to the first dot com era (aka Web 1.0, ~1995 to ~2002). At that time, perl was basically the only game in town (secondarily: Java). (i don't recall what amazon and ebay were in... was it perl or php? how about imdb.com?) most php follows starting in early 2000s, that's when PHP quietly surpassed perl in all battle fronts. it'd be interesting to know what some of the chinese sites uses, and porn sites (e.g. livejasmin, xvideos, youporn) as for Microsoft sites... are they in C/C++ and or dotnet? Xah

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PEP 372 -- Adding an ordered directory to collections
by Armin Ronacher Aug. 7, 2011

Aug. 7, 2011

Abstract ======== This PEP proposes an ordered dictionary as a new data structure for the ``collections`` module, called "odict" in this PEP for short. The proposed API incorporates the experiences gained from working with similar implementations that exist in various real-world applications and other programming languages. Rationale ========= In current Python versions, the widely used built-in dict type does not specify an order for the key/value pairs stored. This makes it hard to use dictionaries as data storage for some specific use cases. Some dynamic programming languages like PHP and Ruby 1.9 guarantee a certain order on iteration. In those languages, and existing Python ordered-dict implementations, the ordering of items is defined by the time of insertion of the key. New keys are appended at the end, keys that are overwritten and not moved. The following example shows the behavior for simple assignments: >>> d = odict() >>> d['parrot'] = 'dead' >>> d['penguin'] = 'exploded' >>> d.items() [('parrot', 'dead'), ('penguin', 'exploded')] That the ordering is preserved makes an odict useful for a couple of situations: - XML/HTML processing libraries currently drop the ordering of attributes, use a list instead of a dict which makes filtering cumbersome, or implement their own ordered dictionary. This affects ElementTree, html5lib, Genshi and many more libraries. - There are many ordererd dict implementations in various libraries and applications, most of them subtly incompatible with each other. Furthermore, subclassing dict is a non-trivial task and many implementations don't override all the methods properly which can lead to unexpected results. Additionally, many ordered dicts are implemented in an inefficient way, making many operations more complex then they have to be. - PEP 3115 allows metaclasses to change the mapping object used for the class body. An ordered dict could be used to create ordered member declarations similar to C structs. This could be useful, for example, for future ``ctypes`` releases as well as ORMs that define database tables as classes, like the one the Django framework ships. Django currently uses an ugly hack to restore the ordering of members in database models. - Code ported from other programming languages such as PHP often depends on a ordered dict. Having an implementation of an ordering-preserving dictionary in the standard library could ease the transition and improve the compatibility of different libraries. Ordered Dict API ================ The ordered dict API would be mostly compatible with dict and existing ordered dicts. (Note: this PEP refers to the Python 2.x dictionary API; the transfer to the 3.x API is trivial.) The constructor and ``update()`` both accept iterables of tuples as well as mappings like a dict does. The ordering however is preserved for the first case: >>> d = odict([('a', 'b'), ('c', 'd')]) >>> d.update({'foo': 'bar'}) >>> d collections.odict([('a', 'b'), ('c', 'd'), ('foo', 'bar')]) If ordered dicts are updated from regular dicts, the ordering of new keys is of course undefined again unless ``sort()`` is called. All iteration methods as well as ``keys()``, ``values()`` and ``items()`` return the values ordered by the the time the key-value pair was inserted: >>> d['spam'] = 'eggs' >>> d.keys() ['a', 'c', 'foo', 'spam'] >>> d.values() ['b', 'd', 'bar', 'eggs'] >>> d.items() [('a', 'b'), ('c', 'd'), ('foo', 'bar'), ('spam', 'eggs')] New methods not available on dict: ``odict.byindex(index)`` Index-based lookup is supported by ``byindex()`` which returns the key/value pair for an index, that is, the "position" of a key in the ordered dict. 0 is the first key/value pair, -1 the last. >>> d.byindex(2) ('foo', 'bar') ``odict.sort(cmp=None, key=None, reverse=False)`` Sorts the odict in place by cmp or key. This works exactly like ``list.sort()``, but the comparison functions are passed a key/value tuple, not only the value. >>> d = odict([(42, 1), (1, 4), (23, 7)]) >>> d.sort() >>> d collections.odict([(1, 4), (23, 7), (42, 1)]) ``odict.reverse()`` Reverses the odict in place. ``odict.__reverse__()`` Supports reverse iteration by key. Questions and Answers ===================== What happens if an existing key is reassigned? The key is not moved but assigned a new value in place. This is consistent with existing implementations and allows subclasses to change the behavior easily:: class movingcollections.odict): def __setitem__(self, key, value): self.pop(key, None) odict.__setitem__(self, key, value) What happens if keys appear multiple times in the list passed to the constructor? The same as for regular dicts: The latter item overrides the former. This has the side-effect that the position of the first key is used because the key is actually overwritten: >>> odict([('a', 1), ('b', 2), ('a', 3)]) collections.odict([('a', 3), ('b', 2)]) This behavior is consistent with existing implementations in Python, the PHP array and the hashmap in Ruby 1.9. Why is there no ``odict.insert()``? There are few situations where you really want to insert a key at an specified index. To avoid API complication, the proposed solution for this situation is creating a list of items, manipulating that and converting it back into an odict: >>> d = odict([('a', 42), ('b', 23), ('c', 19)]) >>> l = d.items() >>> l.insert(1, ('x', 0)) >>> odict(l) collections.odict([('a', 42), ('x', 0), ('b', 23), ('c', 19)]) Example Implementation ====================== A poorly performing example implementation of the odict written in Python is available: `odict.py <http://dev.pocoo.org/hg/sandbox/raw-file/tip/ odict.py>`_ The version for ``collections`` should be implemented in C and use a linked list internally. Other implementations of ordered dicts in various Python projects or standalone libraries, that inspired the API proposed here, are: - `odict in Babel`_ - `OrderedDict in Django`_ - `The odict module`_ - `ordereddict`_ (a C implementation of the odict module) - `StableDict`_ - `Armin Rigo's OrderedDict`_ .. _odict in Babel: http://babel.edgewall.org/browser/trunk/babel/util.py?rev=374#L178 .. _OrderedDict in Django: http://code.djangoproject.com/browser/django/trunk/django/utils/datastructu… .. _The odict module: http://www.voidspace.org.uk/python/odict.html .. _ordereddict: http://www.xs4all.nl/~anthon/Python/ordereddict/ .. _StableDict: http://pypi.python.org/pypi/StableDict/0.2 .. _Armin Rigo's OrderedDict: http://codespeak.net/svn/user/arigo/hack/pyfuse/OrderedDict.py Future Directions ================= With the availability of an ordered dict in the standard library, other libraries may take advantage of that. For example, ElementTree could return odicts in the future that retain the attribute ordering of the source file. Copyright ========= This document has been placed in the public domain.

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