Pydev and Pydev Extensions 1.0.6 release
Hi All, Pydev and Pydev Extensions 1.0.6 have been released Check http://www.fabioz.com/pydev for details on Pydev Extensions and http://pydev.sf.net for details on Pydev Release Highlights in Pydev Extensions: - - New Feature: Show hierarchy (F4) -- Still in a beta state (currently only looks for subclasses on the same project). - Analysis happens in a Thread, so, you should now always have the latest parse without any halts (this happened only when the option was set to analyze only on save). - Class variable marked as error when self ommitted - when an undefined import is found within a try..except ImportError, it will not be reported. - Allow changing the keybinding for activating the Interactive Console (Ctrl+Enter) - Added a simple text-search that looks for in all .py and .pyw files (will be improved in the future to make a real python-like search). - The keywords that match the 'simple' keywords completion do not show up. Release Highlights in Pydev: -- - Assign variables to attributes (Ctrl+2+a): Contributed by Joel Hedlund (this is the first contribution using the new jython scripting engine). - 3 minor 'quirks' were fixed in the indentation engine - The debugger had some changes (so, if you had halts with it, please try it again). - Allow changing the keybinding for activating the Find next problem (Ctrl+.) - The debugger step-return had its behaviour changed. - Additional scripts location added to pythonpath in the jython scripting engine - Transversal of nested references improved - Fixed problems with compiled modules when they had 'nested' module structures (e.g.: wx.glcanvas) What is PyDev? --- PyDev is a plugin that enables users to use Eclipse for Python and Jython development -- making Eclipse a first class Python IDE -- It comes with many goodies such as code completion, syntax highlighting, syntax analysis, refactor, debug and many others. Cheers, -- Fabio Zadrozny -- Software Developer ESSS - Engineering Simulation and Scientific Software http://www.esss.com.br Pydev Extensions http://www.fabioz.com/pydev Pydev - Python Development Enviroment for Eclipse http://pydev.sf.net http://pydev.blogspot.com -- http://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations.html
ANN: PyScript 0.6.0 released
Overview: PyScript is a python module for producing high quality postscript graphics. Rather than use a GUI to draw a picture, the picture is programmed using python and the PyScript objects. Some of the key features are: * All scripting is done in python, which is a high level, easy to learn, well developed scripting language. * All the objects can be translated, scaled, rotated, ... in fact any affine transformation. * Plain text is automatically kerned. * You can place arbitrary LaTeX expressions on your figures. * You can create your own figure objects, and develop a library of figure primitives. * Output is publication quality. License: Released under the GPL Changes: The major change in this release is a complete rewrite of the Talk and Poster classes of the presentation library. There have also been many bug fixes and minor other improvements. For details see the PyScript web page: a href=http://pyscript.sourceforge.net;pyscript.sourceforge.net/a. Getting the software: One can download the latest version (0.6) from: a href=http://pyscript.sourceforge.net;PyScript/a Requirements: * Python 2.2 and above * An up-to-date LaTeX distribution Authors: * Alexei Gilchrist [EMAIL PROTECTED] * Paul Cochrane [EMAIL PROTECTED] If you use this software, have any suggestions, or bug reports, please let us know! -- [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations.html
REMINDER: BayPIGgies: April 26, 7:30pm (Google)
NOTE: Special date of WEDNESDAY April 26 at Google, usual time of 7:30pm Please show up by 7:15 so we can start the meeting on time! This does not change the usual May meeting on May 11 at Google; stay tuned for an announcement of that. Special meeting! One of the lead developers of Django is in town! Jacob Kaplan-Moss will be talking about Django at Google. He says he'll be fine-tuning the talk until the last minute but plans to cover: * How Django came into being -- a bit about the Journal-World, the problems that Django was designed to solve, some bits about its evolution, and a glance at how *we* use Django today. * What writing Django apps look -- I'll show off some real code and talk about each of the bits of Django's stack. This'll be the bulk of the talk. * What's in store for the future of Django -- there's some awesome community work going on, as well as some under-the-radar stuff we're working on that I'll try to preview or at least talk about. BayPIGgies meetings alternate between IronPort (San Bruno, California) and Google (Mountain View, California). For more information and directions, see http://baypiggies.net/ Before the meeting, we sometimes meet at 6pm for dinner. Discussion of dinner plans is handled on the BayPIGgies mailing list. Advance notice: We have speakers for May. We are currently setting up the schedule for the rest of the year. Please e-mail [EMAIL PROTECTED] if you want to suggest an agenda (or volunteer to give a presentation). -- Aahz ([EMAIL PROTECTED]) * http://www.pythoncraft.com/ Argue for your limitations, and sure enough they're yours. --Richard Bach -- http://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations.html
ANNOUNCE: kiwi 1.9.8
New in this released is API documentation which is generated using epydoc[3]. It's still being written but at this point I feel that it's good enough to be a very useful resource to help understand kiwi. Kiwi is a PyGTK framework for building graphical applications loosely based on MVC Model-View-Controller (MVC) and Allen Holub's Visual proxy [1]. Think of Kiwi as a high-level, object-oriented layer built on PyGTK. Its design is based on real-world experience using PyGTK to develop large desktop applications, which use many concepts common to most graphical applications: multiple windows and dialogs, forms, data persistence, lists and high-level classes that support domain objects directly. Download Grab the latest sources from: http://www.async.com.br/projects/kiwi/download/kiwi-1.9.8.tar.gz What's new since 1.9.7? === - distutils.setup() replacement - date tests - FileChooser FileChooserButton - Rename all proxy widgets to start with Proxy - Win32 installation fixes - UI test threading fixes - Sizegroup merging (Ronaldo) - Mask improvements (Ronaldo) - ObjectList improvements (Johan, Ronaldo, Patrick) - Lots of bug fixes (Johan, Ronaldo, Sidnei) Features * An MVC-derived framework of classes: * Views, which represent the graphical display * Controllers, which handles user interaction with the widgets in a View. * Delegates, combines a View and a Controller. * Models, which are special mixins for your domain objects * Proxies, special types of Delegate designed to implement forms * Validation: Kiwi supports validation on different levels: data type validation and verification on the Model/Proxy level, View validation and hooks for visually displaying validation state. * ObjectList widget, which provides a higher level abstraction of GtkTreeView and all its classes (GtkTreeModel, GtkTreeViewColumn, GtkCellRenderer) with hooks to easily integrate into the Kiwi Framework. * Mask suport: You can set a mask on entries to force the input to follow a certain standard, such as zip code, social security, ip address * Gazpacho integration for most (non-deprecated) interactive widgets with attributes for handling validation and proxy attributes. * UI Test framework Features a recorder and a player. The recorder allows you to record different tasks, a script will be saved which will reproduce the actions you made in the interface. * Kiwi Tasklets Tasklet is a small coroutines framework written by Gustavo Carneiro, it was previously known as gtasklets. * PyGTK utilities, to make it easier to add signals and properties to your objects. * i18n translation utilities, to help you translate PyGTK applications, currently depends on gettext and intltool. * and many other things! Requirements Python 2.3 or higher (2.4 recommended) http://www.python.org/ PyGTK 2.6.0 or higher (2.8 recommended) http://www.pygtk.org/ gazpacho 0.6.5 (svn recommenced)http://gazpacho.sicem.biz/ Documentation = Kiwi provides API documentation generated by epydoc, it can be found at http://www.async.com.br/projects/kiwi/api/ Included in the tarball are also a number of examples, which serves as a good starting point. Keep in mind that most of them require gazpacho to be installed. Thanks == Christian Robottom Reis: Original author and design Lorenzo Gil Sanchez: PyGTK 2.x port Also thanks to the following people which has contributed features or bug reports: Ali Afshar, Henrique Romano, Daniel Saran R. da Cunha, Evandro Vale Miquelito, Gustavo Barbieri, Gustavo Carneiro, Sidnei da Silva Patrick O'Brien, Ronaldo Maia Resources = Homepage http://www.async.com.br/projects/kiwi/ Download http://www.async.com.br/projects/kiwi/download/ Repository http://svn.async.com.br/cgi-bin/viewcvs.cgi/kiwi/ Report a bug http://bugs.async.com.br/enter_bug.cgi?product=Kiwi API docs http://www.async.com.br/projects/kiwi/api/ Open bugshttp://tinyurl.com/cyrms Mail. list http://www.async.com.br/mailman/listinfo/kiwi/ [1] http://en.wikipedia.org/wiki/Model-view-controller [2] http://tinyurl.com/2ccch [3] http://epydoc.sourceforge.net/ -- Johan Dahlin [EMAIL PROTECTED] Async Open Source -- http://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations.html
released: RPyC 2.50A
Remote Python Call (RPyC) version 2.50-final is about to be released in the week or so. meanwhile, a release candidate (2.50A) has been released to public review -- please report bugs. i'm still working on real unit-tests for the library, but i'm sure users can help uncover more bugs. http://rpyc.wikispaces.com -tomer -- http://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations.html
ANN: uuid-0.3.1 released
Happy to announce the release of uuid-0.3.1 (bugfix release) What is uuid? uuid is a python module to create RFC 4122 compatible UUIDs The module supports generation off RFC 4122 compatible time based, random, sha1 and md5 based UUIDs Whats new? x. fixed a bug where a call to uuid_nd5() and uuid_sha1() could lead to infinite recursion For download and documentation see http://home.arcor.de/jurner/python/ -- http://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations.html
Re: Instruction at 0x00FC3D70 use memory address 0x00000000. Can't be read.
On Apr 24, 2006, at 5:38 PM, Neil Adams wrote: How do Ifix memory message Ox033fc512 at Ox can't be read You're going to have to provide a LOT more information if you expect anyone here to help you with that. What program caused that? For all we know, notepad.exe could have crashed and caused that error. You have to tell us what program (I'm assuming Python, but who knows, maybe you sent the message to the wrong list), what your OS is, what you were doing, what *exactly* happened, etc. etc. Then maybe someone can provide some insight. Jay P. -- http://mail.python.org/mailman/listinfo/python-list
Re: PyLint results?
Others have answered most of your questions, I won't repeat the answers here, but only join the choir to stress that pylint needs tuning to your coding style. An obvious case is camelCaseMethodNames versus underscored_method_names, but there are also a lot of issues. The default pylint settings match Logilab's coding standards. The coding metrics were heavily inspired by Steve McConnell's Code Complete book, but the figures provided therein have been heavily downscaled to match for Python's expressivity (Code Complete deals mostly with C/C++/Java code). Le 21-04-2006, Michael [EMAIL PROTECTED] nous disait: 2) C: 0: Missing required attribute __revision__ What is this? Is that for CVS? I don't use CVS (we use SVN). I have not seen any sample code which includes this tag yet. But if I include __revision 1.0 somewhere in the code it will remove that warning? We generally have a __revision__ = '$Id$' statement at module top level, which gets replaced a check in time by CVS, which makes it easy to know who checked in the HEAD revision of the module. This behaviour can be emulated with subversion properties. 5) R:547:readDiscreteData: Too many branches (28/12) Python doesn't have the switch/case statements that C/C++ have. So I could have a large block if/elif/else statements. Is there any way to avoid that? 6) R:722:waitDiscretes: Too many local variables (38/15) That's new to me. What is wrong with too many local variables? Can anything be done to improve that besides having too many globals? For these two, I strongly recommend giving a look at Martin Fowler's Refactoring book (published by Addison Wesley). These are typical so called code smells which can be solved using for instance the Extract Method refactoring. Of course, it all depends on the kind of program you are working, and sometimes using intermediate variables helps understanding the code (by providing useful names, for instance). What pylint tells you is there could be an issue here, you should check. -- Alexandre Fayolle LOGILAB, Paris (France). http://www.logilab.com http://www.logilab.fr http://www.logilab.org -- http://mail.python.org/mailman/listinfo/python-list
Re: MinGW and Python
Robert Kern [EMAIL PROTECTED] writes: the gcc project is to provide a portable compiler, not one that generates the best code for any given platform. And in that goal, it succeeds remarkably well. Will a python program be slower on the same machine running windows compared to linux? What I don't understand is that it is not possible to distribute a python compiled with gcc for windows. The main reason I saw in this thread is that python uses mfc. So python requires api access, I guess. Once I asked about distutils here. The answer was that I had access to the source so I could just extend it. After messing around I found I couldn't because I don't have msvc. -- Brian (remove the sport for mail) http://www.et.web.mek.dtu.dk/Staff/be/be.html http://www.rugbyklubben-speed.dk -- http://mail.python.org/mailman/listinfo/python-list
Re: The whitespaceless frontend
Hi, [EMAIL PROTECTED] wrote: but maybe instead of the global.name something to refer to the upper namespace (that can be the global one or the namespace of the function that contains this one) can be more general: upper.x = 1 upper.upper.x = 1 Well, people have been trying to come up with a way to solve the nested scopes restrictions. This may work, but in my opinion nested functions are not so important and I wouldn't spend any time to improve them. Usually you can do anything with classes (and method makes that easier). If we say that closures were invented so that we will avoid the extra typing in cases like def f (self): x = lambda self=self: return self.foo () and beyond that perhaps it is a sign that we should rethink our design we can accept the limitations of python's closures. I think that making self a reserved word that can be used only for its usual purpose can be positive. I agree. EPL does not have shoot-self-in-the-foot protections yet, but it will :) The $ and method statement seem interesting too, but the first is a little perlish (but Ruby has something similar, and people like it), and the method statement look a little redundant. I think the $ can be acceptable (Mostly to reduce typing), even if it doesn't look very nice. '$' is perlish and rubyish (and I got it from ruby indeed). It's the cost of a dynamic language :) In static languages we know at compile-time whether a symbol is local, instance or global. In dynamic languages where scopes are modified when the program runs we have to type something. '$' being unused seems like a good choice. method is good not only because we avoid the extra typing in the definition, but also because -after experiments- it seems that restricting the use of $ in methods, will simplify some confusing cases. For example, what happens in: def foo (cls): def bar (self): return $x # what's that? cls.x or self.x? While now, when you see $ you know it refers to the instance of the method. And nested methods in methods are very rare. Bye, Stelios - sorry for the delayed reply. Unexpected easter vacation. -- http://mail.python.org/mailman/listinfo/python-list
Re: MS VC++ Toolkit 2003, where?
Robert Kern wrote: Oh, that's right, you need an import library for Python24.dll . That shouldn't be a problem: that library is included with Python. For mingw, too? I.e. a .a not a .lib? Right. Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: MinGW and Python
Brian Elmegaard wrote: What I don't understand is that it is not possible to distribute a python compiled with gcc for windows. The main reason I saw in this thread is that python uses mfc. So python requires api access, I guess. You misunderstood. Python does not use MFC. PythonWin (for example) does. That has a lot of implications which are hard to understand if you are not familiar with Windows programming and the C library mess on Windows. It would certainly be possible to distribute a gcc-compiled python. However, what is the point in doing so? Cygwin already includes a gcc-compiled Python, for Windows: http://cygwin.com/packages/python/ Once I asked about distutils here. The answer was that I had access to the source so I could just extend it. After messing around I found I couldn't because I don't have msvc. That is simply not true. You can build the entire Python interpreter with Cygwin (but you don't need to, because there is a precompiled version), and you can build extensions for the python.org binary using MingW. Regards, Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: MS VC++ Toolkit 2003, where?
Martin v. Löwis wrote: Robert Kern wrote: Oh, that's right, you need an import library for Python24.dll . That shouldn't be a problem: that library is included with Python. For mingw, too? I.e. a .a not a .lib? Right. Woohoo! -- Robert Kern [EMAIL PROTECTED] I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth. -- Umberto Eco -- http://mail.python.org/mailman/listinfo/python-list
Re: MinGW and Python
Brian Elmegaard wrote: Robert Kern [EMAIL PROTECTED] writes: the gcc project is to provide a portable compiler, not one that generates the best code for any given platform. And in that goal, it succeeds remarkably well. Will a python program be slower on the same machine running windows compared to linux? Dunno. Depends on the machine. Depends on the program. Depends on how the interpreter and any extension modules and underlying libraries were built. Depends on which Linux and which Windows. I'm sorry, but your question is a non sequitur. I don't understand its relevance to this thread. What I don't understand is that it is not possible to distribute a python compiled with gcc for windows. The main reason I saw in this thread is that python uses mfc. So python requires api access, I guess. It is possible. People have done it. http://jove.prohosting.com/iwave/ipython/pyMinGW.html Once I asked about distutils here. Okay. Again, what's the relevance here? The answer was that I had access to the source so I could just extend it. After messing around I found I couldn't because I don't have msvc. I'm not sure why this matters since distutils is pure Python. If you meant writing extension modules for Python instead of extending distutils, then you're in luck! You can indeed build extension modules with mingw for the standard Python distribution. Please see my post in the thread MS VC++ Toolkit 2003, where?. -- Robert Kern [EMAIL PROTECTED] I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth. -- Umberto Eco -- http://mail.python.org/mailman/listinfo/python-list
Re: Probability Problem
I think I got it. I noticed my code is essentially the same as Tim Peter's (plus the part of the problem he skipped). I read his code 20 minutes before recreating mine from Alex's hints. Thanks! def main(): ways = ways_to_roll() total_ways = float(101**10) running_total = 0 for i in range(1000-390+1): j = i + 390 running_total += ways[i] * ways[j] print running_total / total_ways**2 print ways[:10] def ways_to_roll(): result = [1] for i in xrange(10): result = combine([1] * 101, result) return result def combine(a, b): results = [0] * (len(a) + len(b) - 1) for i, ele in enumerate(a): for j, ele2 in enumerate(b): results[i+j] += ele * ele2 return results main() # output: 3.21962542309e-05 and # [1, 10, 55, 220, 715, 2002, 5005, 11440, 24310, 48620] # 3.21962542309e-05 is 32 out of a million On Apr 24, 2006, at 9:14 PM, Alex Martelli wrote: Elliot Temple [EMAIL PROTECTED] wrote: On Apr 24, 2006, at 8:24 PM, Alex Martelli wrote: Lawrence D'Oliveiro [EMAIL PROTECTED] wrote: In article [EMAIL PROTECTED], Elliot Temple [EMAIL PROTECTED] wrote: Problem: Randomly generate 10 integers from 0-100 inclusive, and sum them. Do that twice. What is the probability the two sums are 390 apart? I think the sum would come close to a normal distribution. Yes, very close indeed, by the law of large numbers. However, very close (in a math course at least) doesn't get the cigar. You can compute the requested answer exactly with no random number generation whatsoever: compute the probability of each result from 0 to 1000, then sum the probabilities of entries that are exactly 390 apart. That was the plan, but how do I get the probability of any given result? (in a reasonable amount of time) BTW I'm not in a math course, just curious. OK, I'll trust that last assertion (sorry for the hesitation, but it's all too easy to ``help'' somebody with a homework assignment and actually end up damaging them by doing it FOR them!-). I'm still going to present this in a way that stimulates thought, rather than a solved problem -- humor me...!-) You're generating a uniformly distributed random number in 0..100 (101 possibilities), 10 times, and summing the 10 results. How do you get a result of 0? Only 1 way: 0 at each attempt -- probability 1 (out of 1010 possibilities). How do you get a result of 1? 10 ways: 1 at one attempt and 0 at each of the others - probability 10 (again in 1010'ths;-). How do you get a result of 2? 10 ways for '2 at one attempt and 0 at each of the others', plus, 10*9/2 ways for '1 at two attempts and 0 at each of the others' -- probability 55 (ditto). ...and so forth, but you'd rather not work it out... So, suppose you start with a matrix of 101 x 10 entries, each of value 1 since all results are equiprobable (or, 1/1010.0 if you prefer;-). You want to compute the number in which you can combine two rows. How could you combine the first two rows (each of 101 1's) to make a row of 201 numbers corresponding to the probabilities of the sum of two throws? Suppose you combine the first entry of the first row with each entry of the second, then the second entry of the first row with each entry of the second, etc; each time, you get a sum (of two rolls) which gives you an index of a entry (in an accumulator row starting at all zeros) to increment by the product of the entries you're considering... Can you generalize that? Or, do you need more hints? Just ask! Alex -- http://mail.python.org/mailman/listinfo/python-list -- Elliot Temple http://www.curi.us/blog/ -- http://mail.python.org/mailman/listinfo/python-list
Re: MS VC++ Toolkit 2003, where?
Robert Kern wrote: Martin v. Löwis wrote: Robert Kern wrote: Oh, that's right, you need an import library for Python24.dll . That shouldn't be a problem: that library is included with Python. For mingw, too? I.e. a .a not a .lib? last time I tinkered with mingw, it could link directly against the DLL file. see the last two minutes in mingw from scratch in 20 minutes post: http://article.gmane.org/gmane.comp.python.general/388046 the MinGW FAQ says that you can use reimp in cases like this: http://www.mingw.org/mingwfaq.shtml#faq-msvcdll but that didn't seem to be necessary (I assume reimp or something is now integrated in mingw, or maybe I have a magic computer...) however, note that the FAQ entry says that you can use an existing LIB file as well, so Python's standard import library should work. /F -- http://mail.python.org/mailman/listinfo/python-list
Re: MS VC++ Toolkit 2003, where?
Alex Martelli wrote: Ron Adam [EMAIL PROTECTED] wrote: ... I still get the following with the tinyurl link: ~~~ The download you requested is unavailable. If you continue to see this message when trying to access this download, go to the Search for a Download area on the Download Center home page. ~~~ Pasting the above tinyurl into firefox results in the following link. http://www.microsoft.com/downloads/details.aspx?familyid=272BE09D-40BB-4d isplaylang=en Which appears to still be truncated. :-/ True, but here's the kicker: using the full URL, which I just dblchecked from Rushby's original message as being (enclosing in ...)...: Yes, I tried the full url also, but was hoping I did something wrong. Sigh... guess not. http://www.microsoft.com/downloads/details.aspx?FamilyId=272BE09D-40BB- 49FD-9CB0-4BFA122FA91Bdisplaylang=en NOW gives me the same error page too. When Rushby suggested it yesterday I immediately used it, and it allowed me to download the Toolkit 2003 just fine -- so, I guess Microsoft must have killed that possibility shortly thereafter (who said they can't move fast?-). As of now, I don't know any more of a URL that's usable to download this, therefore:-( And with a new version of windows due at the end of this year, it's likely those who upgrade to Vista, will also need to upgrade to visual studio 2005 or later. I've seen this pattern before. :-/ Ron -- http://mail.python.org/mailman/listinfo/python-list
Re: python application ideas.
Anthony Greene wrote: Hello, I know this isn't really a python centric question, but I'm seeking help from my fellow python programmers. I've been learning python for the past year and a half, and I still haven't written anything substantial nor have I found an existing project which blows my hair back. Python is my first language, and I plan on learning lisp within the next week but before I do so I'd like to write something meaningful, does anyone have any suggestions? Something they always needed, but never got around to writing it? Without an imagination you pretty much stagnate your whole learning process. Thanks in advance. How about writing a standalone wiki markup parser? I know a *lot* of people who would find this useful.. Tim -- http://mail.python.org/mailman/listinfo/python-list
Re: MinGW and Python
Brian Elmegaard wrote the gcc project is to provide a portable compiler, not one that generates the best code for any given platform. And in that goal, it succeeds remarkably well. Will a python program be slower on the same machine running windows compared to linux? a better optimizer usually results in programs that run faster, not slower. /F -- http://mail.python.org/mailman/listinfo/python-list
Re: Why new Python 2.5 feature class C() return old-style class ?
On Sun, 23 Apr 2006 22:12:01 GMT, [EMAIL PROTECTED] (Bengt Richter) wrote:
[...]
(IMO the proper way to indicate the you don't have a tuple is to use None or
some other sentinel,
not abuse a perfectly legal tuple value).
dis.dis(compile('class X:pass','','exec'))
1 0 LOAD_CONST 0 ('X') --+-- ought to be
LOAD_CONST 0 (None)
Oops, leave the 'X' of course, just replace the next line
3 BUILD_TUPLE 0 --'
6 LOAD_CONST 1 (code object X at 02EE7EA0, file
, line 1)
9 MAKE_FUNCTION0
12 CALL_FUNCTION0
15 BUILD_CLASS
16 STORE_NAME 0 (X)
19 LOAD_CONST 2 (None)
22 RETURN_VALUE
vs code for class x(something):pass
dis.dis(compile('class X(object):pass','','exec'))
1 0 LOAD_CONST 0 ('X')
3 LOAD_NAME0 (object)
6 BUILD_TUPLE 1
9 LOAD_CONST 1 (code object X at 02EFB9A0, file
, line 1)
12 MAKE_FUNCTION0
15 CALL_FUNCTION0
18 BUILD_CLASS
19 STORE_NAME 1 (X)
22 LOAD_CONST 2 (None)
25 RETURN_VALUE
Regards,
Bengt Richter
--
http://mail.python.org/mailman/listinfo/python-list
A QFB agent: how to catch C-level crashes and last Python stack ?
When employing complex UI libs (wx, win32ui, ..) and other extension libs, nice only Python stack traces remain a myth. Currently I'm hunting again a rare C-level crash bug of a Python based Windows app with rare user reports - and still in the dark (I get snippets of machine stack traces / screenshots with random mem. access error / python caused the runtime to terminate in an unusual way / ..) I'd like to hook a kind of quality feedback agent a C-level to enable the user transfer a report (similar to what Mozilla/Netscape has), e.g. in a changed python.exe stub. Next to the machine stack/regs it should grab the relevant last Python thread stack(s), if any, and maybe other useful status and python global vars. (There are also Python threads going on. ) Is that possible? -robert -- http://mail.python.org/mailman/listinfo/python-list
Re: MS VC++ Toolkit 2003, where?
Alex Martelli wrote: OK, I've placed on http://www.aleax.it/Python/ the files that pybench writes (with the -file option) for each machines, the names are onmbp.txt and onwin2k.txt -- just 20k each (I'm not sure their format is documented, but I guess that, worst case, one just needs to study pybench's sources). Nice, thank you. The files just contain pickled data, but you need pybench installed to unpickle the classes. I used the command pybench -s win2k.txt -c osx.txt to compare the data sets. Here are the results. Left two columns are Windows times, right column is change from OS X time. I resorted the tests by percentage change (win2k slowest-fastest) to provide a better picture of what's going on: PYBENCH 1.0 Benchmark: /home/ed/python-w2k.txt (rounds=10, warp=20) measured against: /home/ed/python-osx.txt (rounds=10, warp=20) Tests: per runper oper.diff (slower on win2k) StringMappings: 309.33 ms2.46 us +112.53% ConcatUnicode: 157.47 ms1.05 us +77.43% ConcatStrings: 103.57 ms0.69 us +44.86% DictWithFloatKeys: 169.10 ms0.28 us +21.52% UnicodeProperties: 86.00 ms0.43 us+6.69% PythonFunctionCalls: 85.83 ms0.52 us+1.22% UnicodeSlicing: 85.64 ms0.49 us+0.16% (faster on win2k) IfThenElse: 70.38 ms0.10 us-2.45% SmallLists: 76.98 ms0.30 us-4.44% CompareUnicode: 85.22 ms0.23 us-4.72% StringPredicates: 87.25 ms0.31 us-6.13% NestedForLoops: 38.47 ms0.11 us-8.07% CompareInternedStrings: 59.12 ms0.12 us-8.12% SimpleListManipulation: 41.93 ms0.16 us-8.55% CreateStringsWithConcat: 35.02 ms0.18 us-9.16% TryRaiseExcept: 49.62 ms3.31 us-9.53% StringSlicing: 63.61 ms0.36 us-9.77% SmallTuples: 68.65 ms0.29 us -12.77% CompareFloatsIntegers: 72.31 ms0.16 us -13.72% Recursion: 45.88 ms3.67 us -16.20% CompareFloats: 51.26 ms0.11 us -17.05% CompareStrings: 76.14 ms0.15 us -17.51% PythonMethodCalls: 60.74 ms0.81 us -17.75% CreateUnicodeWithConcat: 90.22 ms0.45 us -17.76% BuiltinFunctionCalls: 39.38 ms0.31 us -17.79% SimpleFloatArithmetic: 57.72 ms0.10 us -19.44% SecondImport: 29.59 ms1.18 us -19.71% CreateInstances: 63.02 ms1.50 us -21.08% SimpleIntFloatArithmetic: 55.92 ms0.08 us -21.78% SimpleComplexArithmetic: 42.40 ms0.19 us -22.84% BuiltinMethodLookup: 78.26 ms0.15 us -24.54% UnicodePredicates: 56.17 ms0.25 us -24.75% SpecialInstanceAttribute: 117.49 ms0.20 us -24.97% DictWithStringKeys: 62.30 ms0.10 us -26.18% TupleSlicing: 73.63 ms0.70 us -26.34% NormalInstanceAttribute: 65.19 ms0.11 us -26.50% UnicodeMappings: 65.20 ms3.62 us -27.68% SecondPackageImport: 31.25 ms1.25 us -28.74% SpecialClassAttribute: 65.94 ms0.11 us -30.30% ListSlicing: 50.75 ms 14.50 us -31.37% SecondSubmoduleImport: 39.39 ms1.58 us -31.98% SimpleDictManipulation: 37.88 ms0.13 us -32.24% NormalClassAttribute: 66.37 ms0.11 us -33.40% DictCreation: 36.66 ms0.24 us -34.25% DictWithIntegerKeys: 54.73 ms0.09 us -35.76% SimpleLongArithmetic: 27.03 ms0.16 us -39.80% TryExcept: 62.54 ms0.04 us -42.17% SimpleIntegerArithmetic: 42.88 ms0.06 us -42.52% CompareIntegers: 42.81 ms0.05 us -45.54% ForLoops: 25.72 ms2.57 us -53.99% CompareLongs: 25.45 ms0.06 us -63.04% Average round time:3847.99 ms -12.61% None of these tests look to me like anything virtualization would affect. Beyond that, I'm not sure what to make of it. The fastest gains on win2k (39%) seem to come from branching and arithmetic tests. Maybe the ms compiler has significantly better branch prediction (might explain why ForLoops and TryExcept have such large gains while NestedForLoops and TryRaiseExcept are more modest). I can't
Re: Counting elements in a list wildcard
hawkesed wrote: If I have a list, say of names. And I want to count all the people named, say, Susie, but I don't care exactly how they spell it (ie, Susy, Susi, Susie all work.) how would I do this? Set up a regular expression inside the count? Is there a wildcard variable I can use? Here is the code for the non-fuzzy way: lstNames.count(Susie) Any ideas? Is this something you wouldn't expect count to do? Thanks y'all from a newbie. Ed Dare I suggest using REs? This looks like something they'de be good for: import re def countMatches(names, namePattern): count = 0 for name in names: if namePattern.match(name): count += 1 return count susie = re.compile(Su(s|z)(i|ie|y)) print countMatches([John, Suzy, Peter, Steven, Susie, Susi], susie) some other patters: iain = re.compile((Ia(i)?n|Eoin)) steven = re.compile(Ste(v|ph|f)(e|a)n) john = re.compile(Jo(h)?n) Iain -- http://mail.python.org/mailman/listinfo/python-list
Re: Counting elements in a list wildcard
On 25/04/2006 3:15 PM, Edward Elliott wrote: Phoneme matching seems overly complex and might grab things like Tsu-zi. It might *only* if somebody had a rush of blood to the head and devised yet another phonetic key algorithm. Tsuzi does *not* give the same result as any of Suzi, Suzie, Susi, and Susie when pushed through any of the following; Soundex, NYSIIS, Metaphone, Dolby, and Caverphone. None of them throw away the 'T' sound. -- http://mail.python.org/mailman/listinfo/python-list
Re: Instruction at 0x00FC3D70 use memory address 0x00000000. Can't be read.
On Apr 24, 2006, at 5:38 PM, Neil Adams wrote:
How do Ifix memory message Ox033fc512 at Ox can't be read
OP
I think the first think to do would be to read this:
http://www.catb.org/~esr/faqs/smart-questions.html
/OP
--
bruno desthuilliers
python -c print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in '[EMAIL PROTECTED]'.split('@')])
--
http://mail.python.org/mailman/listinfo/python-list
Re: python application ideas.
Tim Parkin wrote:
Anthony Greene wrote:
Hello, I know this isn't really a python centric question, but I'm seeking
help from my fellow python programmers. I've been learning python for the
past year and a half, and I still haven't written anything substantial nor
have I found an existing project which blows my hair back. Python is my
first language, and I plan on learning lisp within the next week but
before I do so I'd like to write something meaningful, does anyone have
any suggestions? Something they always needed, but never got around to
writing it? Without an imagination you pretty much stagnate your whole
learning process. Thanks in advance.
How about writing a standalone wiki markup parser? I know a *lot* of
people who would find this useful..
+1
--
bruno desthuilliers
python -c print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in '[EMAIL PROTECTED]'.split('@')])
--
http://mail.python.org/mailman/listinfo/python-list
Re: Multiple hierarchies and method overloading
In article [EMAIL PROTECTED], Ben Cartwright [EMAIL PROTECTED] wrote: Philippe Martin wrote: I renamed A_Func(self) to fix that ... but is there a cleaner way around ? When using multiple inheritence, the order of the base classes matters! When you have to start worrying about complications like this, isn't that a sign that you're taking the whole OO thing a little too seriously? After all, technology is supposed to _solve_ problems, not create them. If the complications of OO are making you lose sight of your original problem, then maybe you should put them aside. -- http://mail.python.org/mailman/listinfo/python-list
Re: Can you create an instance of a subclass with an existing instance of the base class?
In article [EMAIL PROTECTED], bruno at modulix [EMAIL PROTECTED] wrote: Lawrence D'Oliveiro wrote: (snip) I think you're taking Python's OO-ness too seriously. One of the strengths of Python is that it can _look_ like an OO language without actually being OO. According to which definition of OO ? Isn't there one? -- http://mail.python.org/mailman/listinfo/python-list
Re: Multiple hierarchie and method overloading
Philippe Martin wrote:
Hi,
I have something like this:
Class A:
def A_Func(self, p_param):
.
Class B:
def A_Func(self):
.
Class C (A,B):
A.__init__(self)
If that's really your code, you should have an exception right here.
Else, please post real code.
B.__init__(self)
.
self.A_Func() #HERE I GET AN EXCEPTION ... takes at least 2
arguments (1
given).
I renamed A_Func(self) to fix that ... but is there a cleaner way around ?
Perhaps should you read these texts:
http://diveintopython.org/object_oriented_framework/defining_classes.html
http://www.freenetpages.co.uk/hp/alan.gauld/tutclass.htm
http://docs.python.org/tut/node11.html
--
bruno desthuilliers
python -c print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in '[EMAIL PROTECTED]'.split('@')])
--
http://mail.python.org/mailman/listinfo/python-list
Re: need a thread to keep a socket connection alive?
[EMAIL PROTECTED] wrote: the data comming in is alway in 158 bytes though. And one day it may not. :) Consider yourself warned! (In a friendly manner.) -- Ben Sizer -- http://mail.python.org/mailman/listinfo/python-list
Re: Multiple hierarchie and method overloading
Philippe Martin wrote:
Hi,
I have something like this:
Class A:
def A_Func(self, p_param):
.
Class B:
def A_Func(self):
.
Class C (A,B):
A.__init__(self)
B.__init__(self)
.
self.A_Func() #HERE I GET AN EXCEPTION ... takes at least 2
arguments (1
given).
Ho, yes, also: A.A_Func() really takes 2 arguments (self, and p_param).
When called from an instance of A, the first argument (ie: self) will be
automagically feed with the instance itself - but you still have to pass
the second one.
I renamed A_Func(self) to fix that ... but is there a cleaner way around ?
Yes : passing the second argument.
--
bruno desthuilliers
python -c print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in '[EMAIL PROTECTED]'.split('@')])
--
http://mail.python.org/mailman/listinfo/python-list
Re: python application ideas.
That's really the right thing I want to know , I am a Python newbie ,and learn to know that python is very strong ability in large scale application , as a beginner , what is the first useful and meaningful widget can we create through Python ? -- http://mail.python.org/mailman/listinfo/python-list
Re: catching doctype using xml.sax -- please
Sakcee wrote: Hi I would really appreciate if soemone can point me to the direction. how can I use xml.sax to catch doctype entities. there is a xml.sax.DTDHandler , but how should i use it? As all other handlers: XMLReader.setDTDHandler(handler) Diez -- http://mail.python.org/mailman/listinfo/python-list
Re: test assignmet problem
Paolo Pantaleo wrote:
(snip)
Thnx for the help,
actually the problme is not solved
i have [well I want to do...] something like:
if a=b():
do stuff with a
else if a=c():
do stuff with b
where does this 'b' come from ?
else:
do other stuff
well, two solutions are
a1=b()
a2=c()
if a1:
do stuff with a1
else if a2:
do stuff with a2
else:
do other stuff
if the call to b() returns a non-false value, the call to c() is useless.
the other is
if b():
a=b()
do stuff with a
else if c():
a=c()
do stuff with b
else:
do other stuff
You still have useless function calls.
Even if none is exactly the same about:
* the number of times the b() and c() functions are executed
* the final value of a
I think the right one is:
a=b()
if a:
do stuff with a
else:
a=c()
if a=c():
do stuff with b
else:
do other stuff
Almost :
a = b()
if a:
do_stuff_with_b(a)
else:
a = c()
if a:
do_stuff_with_c(a)
else:
do_other_stuff()
Now there are probably better ways to write this, but this would require
more knowledge about your real code.
--
bruno desthuilliers
python -c print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in '[EMAIL PROTECTED]'.split('@')])
--
http://mail.python.org/mailman/listinfo/python-list
Re: Counting elements in a list wildcard
On 25/04/2006 6:26 PM, Iain King wrote: hawkesed wrote: If I have a list, say of names. And I want to count all the people named, say, Susie, but I don't care exactly how they spell it (ie, Susy, Susi, Susie all work.) how would I do this? Set up a regular expression inside the count? Is there a wildcard variable I can use? Here is the code for the non-fuzzy way: lstNames.count(Susie) Any ideas? Is this something you wouldn't expect count to do? Thanks y'all from a newbie. Ed Dare I suggest using REs? This looks like something they'de be good for: import re def countMatches(names, namePattern): count = 0 for name in names: if namePattern.match(name): count += 1 return count susie = re.compile(Su(s|z)(i|ie|y)) print countMatches([John, Suzy, Peter, Steven, Susie, Susi], susie) some other patters: iain = re.compile((Ia(i)?n|Eoin)) steven = re.compile(Ste(v|ph|f)(e|a)n) What about Steffan, Etienne, Esteban, István, ... ? john = re.compile(Jo(h)?n) IMHO, the amount of hand-crafting that goes into a *general-purpose* phonetic matching algorithm is already bordering on overkill. Your method using REs would not appear to scale well at all. -- http://mail.python.org/mailman/listinfo/python-list
Re: Looking for resources for making the jump from Java to Python easier and more productive
Lawrence D'Oliveiro wrote:
In article [EMAIL PROTECTED],
bruno at modulix [EMAIL PROTECTED] wrote:
Lawrence D'Oliveiro wrote:
(snip)
I suppose this is an instance of the more general rule: using OO when
you don't have to.
Lawrence, I'm afraid you're confusing OO with statically-typed
class-based. FWIW, dynamic typing is part of OO since Smalltalk.
I wasn't talking about dynamic typing, I was talking about subclassing,
which is very much a part of OO.
What you wrote implies (well, at least I understand it that way) that
polymorphic dispatch *not* based on subclassing is not OO. Hence my
reaction : the need to use subclassing (inheritance) for subtyping
(polymorphic dispatch) is not a requirement of object orientation and
has never been - it's only a limitation of languages with declarative
static typing (C++, Java, C# etc).
Unless you subscribe to the OO is whatever looks like a good
programming idea definition http://www.paulgraham.com/reesoo.html.
Not really !-)
--
bruno desthuilliers
python -c print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in '[EMAIL PROTECTED]'.split('@')])
--
http://mail.python.org/mailman/listinfo/python-list
Re: RESOLVED Re: PYTHONPATH
Brian van den Broek wrote:
Hi all,
As a fairly new linux user running ubuntu 5.10 I'd had problems
persistently setting my PYTHONPATH environment variable. bruno and
Edward got me most of the way (thanks!); I'm posting what worked for
future googling.
(snip)
The syntax that worked for me was *almost* what bruno suggested. It
didn't work here until I used ':' rather than bruno's ';' as the path
element separator.
oops, my bad :(
Sorry for the typo - it's of course ':'.
--
bruno desthuilliers
python -c print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in '[EMAIL PROTECTED]'.split('@')])
--
http://mail.python.org/mailman/listinfo/python-list
Re: test assignmet problem
bruno at modulix wrote: Almost : a = b() if a: do_stuff_with_b(a) else: a = c() if a: do_stuff_with_c(a) else: do_other_stuff() Now there are probably better ways to write this, but this would require more knowledge about your real code. if there are more than a couple of options you can generalise code such as this to use a for loop: for guard, action in [ (b, do_stuff_with_b), (c, do_stuff_with_c), ]: if guard(): action(a) break else: do_other_stuff() -- http://mail.python.org/mailman/listinfo/python-list
Re: Multiple hierarchies and method overloading
Lawrence D'Oliveiro wrote:
In article [EMAIL PROTECTED],
Ben Cartwright [EMAIL PROTECTED] wrote:
Philippe Martin wrote:
I renamed A_Func(self) to fix that ... but is there a cleaner way around ?
When using multiple inheritence, the order of the base classes matters!
When you have to start worrying about complications like this, isn't
that a sign that you're taking the whole OO thing a little too seriously?
After all, technology is supposed to _solve_ problems, not create them.
If the complications of OO are making you lose sight of your original
problem, then maybe you should put them aside.
def fun(arg1, arg2):
pass
fun()
Traceback (most recent call last):
File stdin, line 1, in ?
TypeError: fun() takes exactly 2 arguments (0 given)
If the complication of functions are making you loose sight of your
original problem, then maybe you should put them aside ?-)
--
bruno desthuilliers
python -c print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in '[EMAIL PROTECTED]'.split('@')])
--
http://mail.python.org/mailman/listinfo/python-list
Re: The whitespaceless frontend
Stelios Xanthakis: in my opinion nested functions are not so important and I wouldn't spend any time to improve them. Usually you can do anything with classes Some people like and use them often (like those ones coming from Pascal-like languages, etc), some other people (like those coming from C-like languages like Java) use them rarely and like classes more. Python can choose to have just one way to solve such problems, or to support both kinds of people. At the moment I think it tries to please both kind of programmers. '$' being unused seems like a good choice. It's less explicit than self. but it's shorter, this improves typing, and allows to produce more compact code: return .join([Graph(, repr($o), , , repr($nodeData), )]) Instead of: return .join([Graph(, repr(self.o), , , repr(self.nodeData), )]) But note that every time you want to add a new piece of syntax you must think if the same syntax can be more useful for more common tasks (like string substitution/templating, in this situation). - sorry for the delayed reply. Unexpected easter vacation. No problem. Bye, bearophile -- http://mail.python.org/mailman/listinfo/python-list
Re: The whitespaceless frontend
[EMAIL PROTECTED] enlightened us with: Some people like and use them often (like those ones coming from Pascal-like languages, etc), some other people (like those coming from C-like languages like Java) use them rarely and like classes more. Python can choose to have just one way to solve such problems, or to support both kinds of people. At the moment I think it tries to please both kind of programmers. If a function X needs a lot of data from the calling function Y, and it is called only from Y, I tend to implement it as an inner function of Y. I like classes a lot, but sometimes I simply want the easiest and cleanest solution. Sybren -- The problem with the world is stupidity. Not saying there should be a capital punishment for stupidity, but why don't we just take the safety labels off of everything and let the problem solve itself? Frank Zappa -- http://mail.python.org/mailman/listinfo/python-list
OOP / language design question
I was wondering, why you always have to remember to call bases' constructors explicitly from the derived class constructor? Why hasn't this been enforced by the language? -- http://mail.python.org/mailman/listinfo/python-list
Re: python application ideas.
Hello, I know this isn't really a python centric question, but I'm seeking help from my fellow python programmers. I've been learning python for the past year and a half, and I still haven't written anything substantial nor have I found an existing project which blows my hair back. Python is my first language, and I plan on learning lisp within the next week but before I do so I'd like to write something meaningful, does anyone have any suggestions? Something they always needed, but never got around to writing it? Without an imagination you pretty much stagnate your whole learning process. Thanks in advance. That's really the right thing I want to know , I am a Python newbie ,and learn to know that python is very strong ability in large scale application , as a beginner , what is the first useful and meaningful widget can we create through Python ? You guys might find browsing through http://wiki.python.org/moin/CodingProjectIdeas inspiring. -- http://mail.python.org/mailman/listinfo/python-list
Re: Probability Problem
I had a possibly similar problem calculating probs related to premium bond permutation. With 10^12 memory ran out v quickly. In the end I got round it by writing a recursive function and quantising the probability density function. Elliot Temple wrote: Problem: Randomly generate 10 integers from 0-100 inclusive, and sum them. Do that twice. What is the probability the two sums are 390 apart? I have code to do part of it (below), and I know how to write code to do the rest. The part I have calculates the number of ways the dice can come out to a given number. The problem is the main loop has 9 iterations and it takes about 2.5 minutes to begin the 4th one, and each iteration is about 101 times longer than the previous one. So: x = 2.5 * 101**6 x /= (60*24*365.25) x 5045631.5622908585 It'd take 5,000 millennia. (If my computer didn't run out of memory after about 4 minutes, that is.) Any suggestions? Either a way to do the same thing much more efficiently (enough that I can run it) or a different way to solve the problem. Code: li = range(101) li2 = [] range101 = range(101) for x in xrange(9): print x is %s % x li2 = [] for y in li: for z in range101: li2 += [y+z] li = li2 print li.count(800) # prints how many ways the dice can add to 800 This link may help: http://www.math.csusb.edu/faculty/stanton/m262/intro_prob_models/calcprob.html -- Elliot Temple http://www.curi.us/blog/ -- http://mail.python.org/mailman/listinfo/python-list
Re: OOP / language design question
[EMAIL PROTECTED]: I was wondering, why you always have to remember to call bases' constructors explicitly from the derived class constructor? Why hasn't this been enforced by the language? Probably because the language doesn't know whether the subclass wants to override its base class's constructor, or enhance it. -- René Pijlman -- http://mail.python.org/mailman/listinfo/python-list
Re: OOP / language design question
Am Dienstag 25 April 2006 12:34 schrieb [EMAIL PROTECTED]: I was wondering, why you always have to remember to call bases' constructors explicitly from the derived class constructor? Why hasn't this been enforced by the language? Because sometimes you don't want to call the base classes constructors? The Python zen says: Better explicit than implicit, and in this case it hits the nail on the head. Better to see right away what your code does (the explicit call to the base class), than to have to work around calling a bases constructor if you don't want to call it. --- Heiko. -- http://mail.python.org/mailman/listinfo/python-list
Re: OOP / language design question
[EMAIL PROTECTED] wrote: I was wondering, why you always have to remember to call bases' constructors explicitly from the derived class constructor? Why hasn't this been enforced by the language? I have another question for you: why does JAVA enforce that a constructor of a base-class must be called prior to everything else in the derived class's constructor? No way to do some computing for parameters that I want to pass to the parent constructor... Besides, this automatically base-constructor-calling only happens for the most trivial of cases - the no-argument-constructors. Regards, Diez -- http://mail.python.org/mailman/listinfo/python-list
Re: MinGW and Python
Martin v. Löwis [EMAIL PROTECTED] writes: It would certainly be possible to distribute a gcc-compiled python. However, what is the point in doing so? Cygwin already includes a gcc-compiled Python, for Windows: Interesting. That is simply not true. Actually, you answered me then too. I misunderstood after reading http://sebsauvage.net/python/mingw.html. Is the information on that page not correct? Has it never been? You can build the entire Python interpreter with Cygwin (but you don't need to, because there is a precompiled version), and you can build extensions for the python.org binary using MingW. Great, then I tend to agree that there is no reason for building it with mingw. -- Brian (remove the sport for mail) http://www.et.web.mek.dtu.dk/Staff/be/be.html http://www.rugbyklubben-speed.dk -- http://mail.python.org/mailman/listinfo/python-list
Re: Counting elements in a list wildcard
John Machin wrote: On 25/04/2006 6:26 PM, Iain King wrote: hawkesed wrote: If I have a list, say of names. And I want to count all the people named, say, Susie, but I don't care exactly how they spell it (ie, Susy, Susi, Susie all work.) how would I do this? Set up a regular expression inside the count? Is there a wildcard variable I can use? Here is the code for the non-fuzzy way: lstNames.count(Susie) Any ideas? Is this something you wouldn't expect count to do? Thanks y'all from a newbie. snip steven = re.compile(Ste(v|ph|f)(e|a)n) What about Steffan, Etienne, Esteban, István, ... ? well, obviously these could be included: (Ste(v|ph|f)(e|a)n|Steffan|Etienne|Esteban), but the OP never said he wanted to translate anything into another language. He just wanted to catch variable spellings. john = re.compile(Jo(h)?n) IMHO, the amount of hand-crafting that goes into a *general-purpose* phonetic matching algorithm is already bordering on overkill. Your method using REs would not appear to scale well at all. Iain -- http://mail.python.org/mailman/listinfo/python-list
Re: Looking for resources for making the jump from Java to Python easier and more productive
Thanks for those ... just by looking at the colour of the links in my browser I'd only found 4 of those already so I appreciate the heads up :- ) -- http://mail.python.org/mailman/listinfo/python-list
Re: MinGW and Python
Robert Kern [EMAIL PROTECTED] writes: If you meant writing extension modules for Python instead of extending distutils, I thought about extending distutils to make non-python installers. I may have misunderstood the answers I got. http://groups.google.com/group/comp.lang.python/browse_thread/thread/3f721b5a38fbc2d1/7af1aea19aa187b6?lnk=stq=author%3Aelmegaard+distutilsrnum=1#7af1aea19aa187b6 mingw for the standard Python distribution. Please see my post in the thread MS VC++ Toolkit 2003, where?. Thanks, I will. -- Brian (remove the sport for mail) http://www.et.web.mek.dtu.dk/Staff/be/be.html http://www.rugbyklubben-speed.dk -- http://mail.python.org/mailman/listinfo/python-list
Re: MinGW and Python
Fredrik Lundh [EMAIL PROTECTED] writes: a better optimizer usually results in programs that run faster, not slower. Got it the wrong after some editing ;-( -- Brian (remove the sport for mail) http://www.et.web.mek.dtu.dk/Staff/be/be.html http://www.rugbyklubben-speed.dk -- http://mail.python.org/mailman/listinfo/python-list
Re: OOP / language design question
Diez B. Roggisch wrote: I have another question for you: why does JAVA enforce that a constructor of a base-class must be called prior to everything else in the derived class's constructor? Well, I can imagine it's done to make sure that the base(s) are properly constructed. Sound s sensible to me. No way to do some computing for parameters that I want to pass to the parent constructor... Try this: Derived::Dreived() : Base(calcParam1(), calcParam2()) ... Besides, this automatically base-constructor-calling only happens for the most trivial of cases - the no-argument-constructors. Well, the language can at least ensure that theconstructor is called - i.e. either call it automatically if it can be called without parameters, or fail with error. -- http://mail.python.org/mailman/listinfo/python-list
Re: OOP / language design question
Heiko Wundram wrote: Because sometimes you don't want to call the base classes constructors? Sounds strange to me at the moment, but I'll try to adjust to this thought. Python zen says: Better explicit than implicit, and in this case it hits the nail on the head. Better to see right away what your code does (the explicit call to the base class), than to have to work around calling a bases constructor if you don't want to call it. Thanks, that explains it somehow - at least, it's consistent with explicit self. I think I'll need some shift in thinking after C++. -- http://mail.python.org/mailman/listinfo/python-list
Re: OOP / language design question
[EMAIL PROTECTED]: I think I'll need some shift in thinking after C++. +1 qotw -- René Pijlman -- http://mail.python.org/mailman/listinfo/python-list
Re: OOP / language design question
Well, I can imagine it's done to make sure that the base(s) are properly constructed. Sound s sensible to me. It often is - there are popular examples in python where missing a constructor will cause a program to fail spectacular. But is it _always_ a sensible thing to do? No. If you only want some code inherited, but set up the required constraints to do so yourself. Such things can't be expressed in C++/JAVA, but that doesn't mean they aren't the sensible solution in some cases. No way to do some computing for parameters that I want to pass to the parent constructor... Try this: Derived::Dreived() : Base(calcParam1(), calcParam2()) ... Oh, I know about that. however, there are limits to this. For example, you can't do anything that depends on constructors called before in case of multiple inheritance. And you are forced to create a static method to do so, which can be viewed as ugly as well. Well, the language can at least ensure that theconstructor is called - i.e. either call it automatically if it can be called without parameters, or fail with error. Yes, it can do that because of static typing - in fact it will fail on a lot more of occasions with a compilation error. The question here is if you are willing to trade freedom of expressiveness against the proposed security of static typing. I found that I favor the former and can live without the latter. Diez -- http://mail.python.org/mailman/listinfo/python-list
Re: Counting elements in a list wildcard
On 25/04/2006 8:51 PM, Iain King wrote: John Machin wrote: On 25/04/2006 6:26 PM, Iain King wrote: hawkesed wrote: If I have a list, say of names. And I want to count all the people named, say, Susie, but I don't care exactly how they spell it (ie, Susy, Susi, Susie all work.) how would I do this? Set up a regular expression inside the count? Is there a wildcard variable I can use? Here is the code for the non-fuzzy way: lstNames.count(Susie) Any ideas? Is this something you wouldn't expect count to do? Thanks y'all from a newbie. snip steven = re.compile(Ste(v|ph|f)(e|a)n) What about Steffan, Etienne, Esteban, István, ... ? well, obviously these could be included: (Ste(v|ph|f)(e|a)n|Steffan|Etienne|Esteban), but the OP never said he wanted to translate anything into another language. Neither did I. But if you have to cope with a practical situation like where the birth certificate says István and the job application says Steven and the foreman calls him Steve, you won't be stuffing about with hand-crafted REs, one per popular given name. Could be worse: the punter could have looked up a dictionary and changed his surname from Kovács to Smith; believe me -- it happens. Oh and if you cast your net as wide as the Pacific islands, chuck in Sitiveni. That's enough examples. We won't go near Benjamin :-) -- http://mail.python.org/mailman/listinfo/python-list
Re: OOP / language design question
[EMAIL PROTECTED] wrote: Heiko Wundram wrote: Because sometimes you don't want to call the base classes constructors? Sounds strange to me at the moment, but I'll try to adjust to this thought. It makes sense in more static languages such as C++. The base class is initialised by the constructor, so you have to do everything possible to ensure that initialisation is done before you actually try to use any part of the base class. Weird things can still happen in C++ if you start calling methods too soon (e.g. to calculate some of the base constructor's parameters): you can find uninitialised member variables and you might not get exactly the virtual methods you expected. Python is more laid back about these things. The object itself already exists when __init__ is first called. It already has a type, which (unlike C++) isn't going to change part way through. All that is missing are a few attributes, and if you try to access them too soon you'll get an exception rather than a random value. It makes sense therefore to give the programmer the scope to override the expected sequence of initialisation for those rare cases where it actually matters. The programmer also gets enough scope to shoot themselves in the foot, but Python programmers are expected to be intelligent enough not to do that accidentally. Usually though, if a subclass doesn't immediately call the base class constructors as the first thing it does in __init__ it indicates poor code and should be refactored. BTW, the same arguments apply to destructors: if you have a __del__ method and need to call the base __del__ methods you have to do that manually as well. -- http://mail.python.org/mailman/listinfo/python-list
RE: Accessing Parallel Port in Python Error : Priviledged Instruction
type your message here -- http://mail.python.org/mailman/listinfo/python-list
Zope 3
I have been developing in PHP for some time now and needed to look into application frameworks to speed up my development. I was looking into Horde and CakePHP before I was introduced to Python. I started learing python and within a few *hours* I already wrote my first small program and I still use it! I love Python! Then I was introduced to Zope by freak accident. While Zope looked like the answer to my dillemma, I still can't get my head wrapped around it. Is it because I don't know Python well enough? Or is it just that difficult to learn? I would like to start my next web project (a database of demographic info on scientists in Africa) on Zope 3. Could anybody point me in the right direction? Where should I start? -- http://mail.python.org/mailman/listinfo/python-list
Re: Hooking things up in GUI application
Ryan Ginstrom wrote:
Apropos recent threads about GUI editors, coming from a Win32/WTL C++
background, I actually like the idea of being able to (easily) create GUIs
programmatically.
But I still see a lot of the same tedium: hooking up events to handlers, and
getting data into and out of dialogs. In C++, this is generally handled
through code generation and/or macros, but IMO these are brittle and ugly.
So my question: Is there a Pythonic way to make these tedious hookups easier?
If you use PyGTK (it also runs on Windows), you can design the GUI with
GLADE and then use libglade to import the gui as an xml-resource. You
have to write all handlers (you do anyway), but the GUI design becomes
entirely visual and the hookup becomes one single like of code. It
doesn't get easier than that. As a bonus you get an hardware
accelerated GUI (Cairo takes care of that, currently through OpenGL but
a DirectX backend is planned). I.e. a hardware accelerated GUI
represented as an XML resource. Isn't that Microsoft's next 'big thing'
codenamed 'Avalon'? I wonder where they got the idea.
This should illustrate the level of tediousness when using PyGTK:
import pygtk
pygtk.require('2.0')
import gtk
import gtk.glade
class MyGUI:
def __init__(self):
win1 = libglade.GladeXML('mygui.glade','window1')
win1.signal_autoconnect(self) # hook event handlers, pass any
class or dictionary
win1.maximize()
def on_win1_destroy(self):
gtk.main_quit()
if __name__ == '__main__'
gui = MyGUI()
gtk.main()
You cannot make it less tedious in C++. Even if you use Visual Studio
and all sorts of 'wizards' to autogenerate code. Actually, if you do
use C, C++ or Ada, GLADE can autogenerate code just like Visual Studio.
But since an XML resource us much easier to modify and maintain, it is
not recommended.
--
http://mail.python.org/mailman/listinfo/python-list
Re: OOP / language design question
Duncan Booth wrote:
(snip)
Usually though, if a subclass doesn't immediately call the base class
constructors as the first thing it does in __init__ it indicates poor code
and should be refactored.
Not necessarily. It's a common case to have some computations to do/some
attributes to set in the derived class's __init__ before calling the
superclass's.
--
bruno desthuilliers
python -c print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in '[EMAIL PROTECTED]'.split('@')])
--
http://mail.python.org/mailman/listinfo/python-list
Re: OOP / language design question
[EMAIL PROTECTED] wrote:
I was wondering, why you always have to remember to call bases'
constructors
pedantic
s/constructors/__init__/
the __init__() method is *not* the constructor. Object's instanciation
is a two-stage process: __new__() is called first, then __init__().
/pedantic
--
bruno desthuilliers
python -c print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in '[EMAIL PROTECTED]'.split('@')])
--
http://mail.python.org/mailman/listinfo/python-list
Re: Can you create an instance of a subclass with an existing instance of the base class?
Lawrence D'Oliveiro wrote:
In article [EMAIL PROTECTED],
bruno at modulix [EMAIL PROTECTED] wrote:
Lawrence D'Oliveiro wrote:
(snip)
I think you're taking Python's OO-ness too seriously. One of the
strengths of Python is that it can _look_ like an OO language without
actually being OO.
According to which definition of OO ?
Isn't there one?
Your claim that Python _look_ like an OO language without actually
being OO implicitely relies on a definition of OO - or is just
meaningless. So I ask you: what definition of OO do you use to support
your claim ?
--
bruno desthuilliers
python -c print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in '[EMAIL PROTECTED]'.split('@')])
--
http://mail.python.org/mailman/listinfo/python-list
Re: MinGW and Python
Martin v. Löwis wrote: - there is no build process available to do that In MSYS: $ ./configure --prefix=/c/mingw $ make $ make install This should be obvious to any with Unix experience. MinGW actually distribute precompiled Python binaries as well (in MSYS-DTK). - people building extensions to Python must be able to do so with Microsoft C++, since some of these extensions are written using MFC. MinGW can compile MFC. Download Windows Platform SDK and you get the MFC source. - developing Python itself in Visual Studio is quite convenient; in particular, the debugger works better than gdb. Eclipse is an excellent IDE that works with MinGW. -- http://mail.python.org/mailman/listinfo/python-list
PIL / libjpeg install problem
Hello all, I am installing the Python Imaging Library (1.1.5). Following the README that came with PIL sources, I ran path/to/python setup.py build_ext -i which informed me that JPEG support is OK. However when I run path/to/python selftest.py from the same package, I get an IOError: decoder jpg not available. This is a RHEL4 server and I am building PIL for a selfcompiled Python 2.3.5 install. Libjpeg and libjpeg-devel are installed via RPM. Any help appreciated. Full error here: Failure in example: _info(Image.open(Images/lena.jpg)) from line #24 of selftest.testimage Exception raised: Traceback (most recent call last): File ./doctest.py, line 499, in _run_examples_inner exec compile(source, string, single) in globs File string, line 1, in ? File ./selftest.py, line 21, in _info im.load() File PIL/ImageFile.py, line 180, in load d = Image._getdecoder(self.mode, d, a, self.decoderconfig) File PIL/Image.py, line 328, in _getdecoder raise IOError(decoder %s not available % decoder_name) IOError: decoder jpeg not available 1 items had failures: 1 of 55 in selftest.testimage ***Test Failed*** 1 failures. *** 1 tests of 55 failed. -- Mikko Koivunen -- http://mail.python.org/mailman/listinfo/python-list
Re: Zope 3
Derick van Niekerk wrote:
I have been developing in PHP for some time now and needed to look into
application frameworks to speed up my development. I was looking into
Horde and CakePHP before I was introduced to Python. I started learing
python and within a few *hours* I already wrote my first small program
and I still use it!
I love Python! Then I was introduced to Zope by freak accident. While
Zope looked like the answer to my dillemma, I still can't get my head
wrapped around it. Is it because I don't know Python well enough? Or is
it just that difficult to learn?
Zope is a world in itself - and is certainly not the simplest tool to
learn (nor the most pythonic). You may want to consider other options
like Django, Pylon or Turbogears.
My 2 cents.
--
bruno desthuilliers
python -c print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in '[EMAIL PROTECTED]'.split('@')])
--
http://mail.python.org/mailman/listinfo/python-list
Re: Parsing XML/XSLT
veracon wrote: I'm looking to use XML and XSLT for templates in a system I'm writing, however I'm not really sure which parser is the best. Basically, which library has the most features, and which is the most supported? lxml arguably has the most features by now, as it is based on libxml2 and libxslt (libexslt support is in SVN) and wraps most of their features into easy-to-use Python APIs. At least lxml's API is also arguably the most supported as it mostly compatible to ElementTree (which made it into Python 2.5). http://codespeak.net/lxml Beware though, I'm somewhat biased as I'm one of the authors. Stefan -- http://mail.python.org/mailman/listinfo/python-list
Re: MinGW and Python
Robert Kern wrote: - gcc does not optimize particularly well. That is beyond BS. The more recent gcc releases optimize as well as any commercial compiler. GCC 4 may even optimize better than MSVC. GCC is the compiler used to build the Linux kernel and MacOSX. If it can deal with this I say it can handle Python as well. My guess is you will not notice any performance difference for the Python interpreter. Doesn't Python run well on Linux? GCC is used to build Python on Linux. MinGW is GCC. MinGW on Windows creates the same binary code as GCC on Linux. -- http://mail.python.org/mailman/listinfo/python-list
Re: How to search HUGE XML with DOM?
Sullivan WxPyQtKinter wrote: My search needs: 1. Search and return all the record (an element) with specific id. 2. Search and return all the record whose child nodes has a specific id or attribute. Try lxml, which is based on the libxml2 library. The current SVN version has support for xml:id through the XMLDTDID function. It simply returns an XML tree and an ID dictionary. http://codespeak.net/lxml Stefan -- http://mail.python.org/mailman/listinfo/python-list
Re: OOP / language design question
[EMAIL PROTECTED] wrote: Heiko Wundram wrote: Because sometimes you don't want to call the base classes constructors? Sounds strange to me at the moment, but I'll try to adjust to this thought. In Java and C++, classes have private members that can only be accessed by the class itself (and, in C++, friends). In those languages, a base constructor needs to be called to initialize the base class's private members. Python has no private members (except for the double underscore thingies, which aren't that common). Unlike C++ and Java, the derived class's __init__ can usually initialize all the base class's members, and it's occasionally useful to do so. I would agree it's a mistake to not call the base class's __init__ unless you're doing it deliberately. If you want a tool to catch those mistakes, have a look at pychecker. It can inform you whenever the base class __init__ is not called. (However, I totally disagree that it's a good idea to always call it first, though. I've written base class __init__s that expected the subclass to provide initialization methods, and some of those methods needed some subclass members to exist before they were called.) -- http://mail.python.org/mailman/listinfo/python-list
Re: MinGW and Python
Robert Kern wrote: Dunno. Depends on the machine. Depends on the program. Depends on how the interpreter and any extension modules and underlying libraries were built. Depends on which Linux and which Windows. I'm sorry, but your question is a non sequitur. I don't understand its relevance to this thread. The relevance: Python is built with GCC on Linux. Do you or do you not see a performance hit on Linux? MinGW is GCC. Will you get a performance hit when building Python with MinGW? -- http://mail.python.org/mailman/listinfo/python-list
Re: need a thread to keep a socket connection alive?
yeah, he he -- http://mail.python.org/mailman/listinfo/python-list
Re: OOP / language design question
bruno at modulix wrote: Duncan Booth wrote: (snip) Usually though, if a subclass doesn't immediately call the base class constructors as the first thing it does in __init__ it indicates poor code and should be refactored. Not necessarily. It's a common case to have some computations to do/some attributes to set in the derived class's __init__ before calling the superclass's. I did only say 'usually'. Can you actually think of any good examples where you have to set a derived attribute before you can call the base class constructor? I can't, which is why I was a bit vague. The base class is unlikely to depend on the derived class attributes, and unless it does there should be no reason which you can't just call the base __init__ straight away. Perhaps if the base __init__ calls an overridden method, but at that point it sounds to me like something wants refactoring. I can think that you might have to do some computations to calculate parameters for the base __init__, but that is a separate issue. -- http://mail.python.org/mailman/listinfo/python-list
Re: MinGW and Python
I forgot to mention that C libraries built with Visual C++ and MinGW are binary compatible. MinGW can link libararies and object files from Visual C++. Although Python may be build with Visual C++, you can still compile and link your C extensions with MinGW. -- http://mail.python.org/mailman/listinfo/python-list
RE: MinGW and Python
-Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] g] On Behalf Of sturlamolden Sent: Tuesday, April 25, 2006 2:27 PM Subject: Re: MinGW and Python Robert Kern wrote: - gcc does not optimize particularly well. That is beyond BS. The more recent gcc releases optimize as well as any commercial compiler. GCC 4 may even optimize better than MSVC. Not to talk of standard compliance (msvc-c99 anyone?). cheers, aa -- Andreas Ames | Programmer | Comergo GmbH | Voice: +49 69 7505 3213 | ames AT avaya . com -- http://mail.python.org/mailman/listinfo/python-list
Re: OOP / language design question
bruno at modulix wrote: [EMAIL PROTECTED] wrote: I was wondering, why you always have to remember to call bases' constructors pedantic s/constructors/__init__/ the __init__() method is *not* the constructor. Object's instanciation is a two-stage process: __new__() is called first, then __init__(). /pedantic You know, Python's __init__ has almost the same semantics as C++ constructors (they both initialize something that's already been allocated in memory, and neither can return a substitute object). I actually think constructors are misnamed in C++, they should be called initializers (and destructors finalizers). The only thing is that C++ doesn't always call operator new when constructing objects, whereas Python always calls __new__, so you can put some initialization in __new__ if you want. Other than that I'd say that Python __init__ is analogous to Java and C++ constructors, but is not a constructor because C++ and Java constructors are not constructors. :) And Java has pointers, not references. :) A-rose-by-any-other-name-ly yr's, Carl Banks -- http://mail.python.org/mailman/listinfo/python-list
Re: python application ideas.
momolulu wrote: That's really the right thing I want to know , I am a Python newbie ,and learn to know that python is very strong ability in large scale application , as a beginner , what is the first useful and meaningful widget can we create through Python ? What makes you think that the first useful and meaningful widget is the same thing for everyone ? The first thing I built as a Python beginner was a high-volume fault-tolerant distributed image production system for heterogenous environments. The most recent thing I built is a small script that takes an infogami comment and reposts it as an article. What kind of applications and systems do you usually work on ? /F -- http://mail.python.org/mailman/listinfo/python-list
EuroPython 2006: Call for papers
Hi all, A shameless plug and reminder for EuroPython 2006 (July 3-5): * you can submit talk proposals until May 31st. * there is a refereed papers track; deadline for abstracts: May 5th. See the full call for papers below. A bientot, Armin Rigo Carl Friedrich Bolz EuroPython 2006 CERN, Geneva, 3-5 July Refereed Track: Call for Paper http://www.europython.org EuroPython is the only conference in the Python world that has a properly prestigious peer-reviewed forum for presenting technical and scientific papers. Such papers, with advanced and highly innovative contents, can equally well stem from academic research or industrial research. We think this is an important function for EuroPython, so we are even making some grants available to help people with travel costs. For this refereed track, we will be happy to consider papers in subject areas including, but not necessarily limited to, the following: * Python language and implementations * Python modules (in the broadest sense) * Python extensions * Interoperation between Python and other languages / subsystems * Scientific applications of Python * Python in Education * Benchmarking Python We are looking for Python-related scientific and technical papers of advanced, highly innovative content that present the results of original research (be it of the academic or industrial research kind), with proper attention to state of the art and previous relevant literature/results (whether such relevant previous literature is itself directly related to Python or not). We do not intend to let the specific subject area block a paper's acceptance, as long as the paper satisfies other requirements: innovative, Python-related, reflecting original research, with proper attention to previous literature. Abstracts = Please submit abstracts of no more than 200 words to the refereeing committee. You can send submissions no later than 5 May 2006. We shall inform you whether your paper has been selected no later than 15 May 2006. For all details regarding the submission of abstracts, please see the EuroPython website (http://www.europython.org). Papers If your abstract is accepted, you must submit your corresponding paper before 17 June 2006. You should submit the paper as a PDF file, in A4 format, complete, stand-alone, and readable on any standards-compliant PDF reader (basically, the paper must include all fonts and figures it uses, rather than using external pointers to them; by default, most PDF-preparation programs typically produce such valid stand-alone PDF documents). Refereeing == The refereeing committee, selected by Armin Rigo, will examine all abstracts and papers. The committee may consult external experts as it deems fit. Referees may suggest or require certain changes and editing in submissions, and make acceptance conditional on such changes being performed. We expect all papers to reflect the abstract as approved and reserve the right, at our discretion, to reject a paper, despite having accepted the corresponding abstract, if the paper does not substantially correspond to the approved abstract. Presentation The paper must be presented at EuroPython by one or more of the authors. Presentation time will be either half an hour or an hour, including time for questions and answers, depending on each paper's details, and also on the total number of papers approved for presentation. Proceedings === We will publish the conference's proceedings in purely electronic form. By presenting a paper, authors agree to give the EuroPython conference non-exclusive rights to publish the paper in electronic forms (including, but not limited to, partial and total publication on web sites and/or such media as CDROM and DVD-ROM), and warrant that the papers are not infringing on the rights of any third parties. Authors retain all other intellectual property rights on their submitted abstracts and papers excepting only this non-exclusive license. Subsidised travel = We have funds available to subsidise travel costs for some presenters who would otherwise not be able to attend EuroPython. When submitting your abstract, please indicate if you would need such a subsidy as a precondition of being able to come and present your paper. (Yes, this possibility does exist even if you are coming from outside of Europe. Papers from people in New Zealand who can only come if their travel is subsidised, for example, would be just fine with us...). -- http://mail.python.org/mailman/listinfo/python-list
Re: OOP / language design question
Carl Banks wrote: You know, Python's __init__ has almost the same semantics as C++ constructors (they both initialize something that's already been allocated in memory, and neither can return a substitute object). There is a significant difference: imagine B is a base type and C a subclass of B: When you create an object of type C in Python, while B.__init__ is executing self is an object of type C (albeit without all the attributes you expect on your C). In C++ when the B() constructor is executing the object is an object of type B. It doesn't become a C object until the C() constructor is executing. In other words, the object is constructed in Python before any __init__ is called, but in C++ it isn't constructed until after all the base class constructors have returned. -- http://mail.python.org/mailman/listinfo/python-list
Re: python application ideas.
I need a python source code diagrammer that actually works out-of-the-box to explore all the code already written out there. something like SmallWorlds was to java before they got rid of it. -- http://mail.python.org/mailman/listinfo/python-list
RE: Hooking things up in GUI application
Behalf Of sturlamolden If you use PyGTK (it also runs on Windows), you can design the GUI with GLADE and then use libglade to import the gui as an xml-resource. Yes, I've tried something similar with wxGlade. Nice, but it doesn't seem to remove the most tedious work -- hooking up handlers (although it does help here, at the cost of some behind-the-scenes magic), and getting data into and out of GUI widgets. That's the kind of boilerplate code that makes GUI development a pain in my opinion -- the actual GUI design/layout isn't so bad, especially with the spacer layout concept. -- Regards, Ryan Ginstrom -- http://mail.python.org/mailman/listinfo/python-list
MySQLdb begin() -
Hi - Feeling a bit weird about this but I cannot find the 'begin' method on a connection object of MySQLdb. Can anyone explain why ? I'm using version 1.2.0 which is pretty recent and I've read that 'begin' should be a method of connection but it's not there ! Feeling pretty puzzled ! Below are the details of what I see ... import MySQLdb c= MySQLdb.Connect(host='localhost', user='a',passwd='b', db='c',compress=1) c.begin() Traceback (most recent call last): File stdin, line 1, in ? AttributeError: 'Connection' object has no attribute 'begin' o=MySQLdb o.__version__ '1.2.0' o.__revision__ '1.37' o.apilevel '2.0' Be interested in any comments. regards Richard. -- http://mail.python.org/mailman/listinfo/python-list
Re: Zope 3
bruno at modulix wrote: Zope is a world in itself - and is certainly not the simplest tool to learn (nor the most pythonic). Those statements apply more to Zope 2 than Zope 3 (and Zope 2 is moving more and more toward Zope 3 these days). One of Zope 3's main goals was to focus on the Python programmer as a primary target. That being said there /are/ some powerful and novel concepts used in Z3 (the component framework). You may want to consider other options like Django, Pylon or Turbogears. It's true that Z3 is not currently focused very well on the middle-class developer. It's more of an industrial-strength kind of thing, but considerable thought has been given lately on how to build bridges so everyone can benefit without being full-time Zope masters. Toward that end, I wrote a little quick start guide that might help the OP: http://www.benjiyork.com/quick_start -- Benji York -- http://mail.python.org/mailman/listinfo/python-list
Re: Python on Nintendo DS
An update to my Python on Nintendo DS efforts. Summary: - Working bug free port of Python for the Nintendo DS. - Programmers wanted to help write extensions to expose the DS hardware to Python. - Stackless Python supported, but not bug free. When I last worked on it, it had several remaining bugs including a broken zipimport, unreliability due to limited stack space and more. I spent a statutory holiday on it and located and fixed all the bugs, including the allocation of stack space and the problems with zipimport (due to a misunderstanding about what seek function API I should respect). As it stands now, it seems pretty bug free. Python itself running on the Nintendo DS with no access to the hardware features (graphics, microphone, speakers, touchscreen) is not much use. As a text-based calculator it serves one purpose I guess. But to really serve as a useful tool on the DS, it needs to expose these pieces of hardware. SDL is one option, as there is a reportedly buggy port of SDL for the DS, and ideally as PyGame is based on SDL, a port of that would hopefully be straightforward. If anyone has an experience writing extension modules in C, and with programming the DS hardware in C, and wishes to help flesh out some form of library codebase to make this a useful port of Python, please let me know! :) Also, I switched to the Stackless Python code base. The tasklet scheduler locks up if invoked, but I haven't had the chance to look into this yet. But given that tasklets run and switch in the limited scenarios I have tried, fixing the scheduler should be a matter of time. Richard -- http://mail.python.org/mailman/listinfo/python-list
I have problems with creating the classic game Wumpus. the file: http://esnips.com/webfolder/b71bfe95-d363-4dd3-bfad-39999a9e36d0
Im trying to create a version of the game Wumpus. Mine is called Belzebub. But im STUCK! And its due tuesday 2 maj. Im panicing! Can some one help me?? here is the file: http://esnips.com/webfolder/b71bfe95-d363-4dd3-bfad-3a9e36d0 What i have the biggest problems with now is between line 8 and 23. How i can move the character trough the game. Other parts of the game that have with the movement to do is between line 83-114 and 123-143. This is part of the spec: The player walks around in the hallways, finds and tries to kill Wumpus (Belzebub). The game finishes when the player or Belzebub dies. The player has bombs which he can shoot. When he shoots he can controll th ebombs for three moves, north, south, east or west three times. If he is not careful he can shoot himself, ex first move: north. second move south. Let every room be represented by the object room. In the object, information of what exists in the room is stored. (Belzebub, teleporters, fire traps, acid traps or nothing). and where the halways leads. (north hallway leads to room 17, the east to room 2 etc.). Create a list of room objects to represent the hallways (every room have has a number). The content of the rooms shall be randomized in the beginning of the program. Aproximatly 20% of the rooms should contain traps, 30% should contain teleporters and in one of the rooms is Belzebub. One room can not contain more than one danger, no traps and teleporters together etc. Teleporters transports the player from one room to another random room. If the player encounters a trap o Belzebub he is killed and GAME OVER. The halways should also be randomized in the beginning of the program. Like this: * Create a list with all the room numbers and shuffle it so all of the rooms is in a mixed order. ex. [5 2 12 18 9 1 3 6 14 19 11 7 17 4 20 16 10 15 8 13] * Connect the rooms in east-west direction so that the east hallway from room 5 leads to room 2 and the west hallway from room to leads back to room 5 etc. The last room in the lest should be connected with the first. * Shuffle a new list and do the same thing in north-south direction. once again the file: http://esnips.com/webfolder/b71bfe95-d363-4dd3-bfad-3a9e36d0 -- http://mail.python.org/mailman/listinfo/python-list
I have problems with creating the classic game Wumpus. the file: http://esnips.c
Im trying to create a version of the game Wumpus. Mine is called Belzebub. But im STUCK! And its due tuesday 2 maj. Im panicing! Can some one help me?? here is the file: http://esnips.com/webfolder/b71bfe95-d363-4dd3-bfad-3a9e36d0 What i have the biggest problems with now is between line 8 and 23. How i can move the character trough the game. Other parts of the game that have with the movement to do is between line 83-114 and 123-143. This is part of the spec: The player walks around in the hallways, finds and tries to kill Wumpus (Belzebub). The game finishes when the player or Belzebub dies. The player has bombs which he can shoot. When he shoots he can controll th ebombs for three moves, north, south, east or west three times. If he is not careful he can shoot himself, ex first move: north. second move south. Let every room be represented by the object room. In the object, information of what exists in the room is stored. (Belzebub, teleporters, fire traps, acid traps or nothing). and where the halways leads. (north hallway leads to room 17, the east to room 2 etc.). Create a list of room objects to represent the hallways (every room have has a number). The content of the rooms shall be randomized in the beginning of the program. Aproximatly 20% of the rooms should contain traps, 30% should contain teleporters and in one of the rooms is Belzebub. One room can not contain more than one danger, no traps and teleporters together etc. Teleporters transports the player from one room to another random room. If the player encounters a trap o Belzebub he is killed and GAME OVER. The halways should also be randomized in the beginning of the program. Like this: * Create a list with all the room numbers and shuffle it so all of the rooms is in a mixed order. ex. [5 2 12 18 9 1 3 6 14 19 11 7 17 4 20 16 10 15 8 13] * Connect the rooms in east-west direction so that the east hallway from room 5 leads to room 2 and the west hallway from room to leads back to room 5 etc. The last room in the lest should be connected with the first. * Shuffle a new list and do the same thing in north-south direction. Once again the file: http://esnips.com/webfolder/b71bfe95-d363-4dd3- bfad-3a9e36d0 -- http://mail.python.org/mailman/listinfo/python-list
Re: Multiple hierarchies and method overloading
Well, the whole point was to clean up my code: Actually this is what I have: Class A: def A_Func(self, p_param): . Class B: def A_Func(self): . Class C (A,B): A.__init__(self) B.__init__(self) Class D (A,B): A.__init__(self) B.__init__(self) Where A is a wxWidget class and B a Common/utility class which I wanted to factorize (and yes, inheritance was not mandatory here, just simpler) My common class does have an A_Func(self) while wxWidget an A_Func(self, p_param) == I actually got the error calling A_Func(self) as it was checked against A_Func(self, p_param). Regards, Philippe Lawrence D'Oliveiro wrote: In article [EMAIL PROTECTED], Ben Cartwright [EMAIL PROTECTED] wrote: Philippe Martin wrote: I renamed A_Func(self) to fix that ... but is there a cleaner way around ? When using multiple inheritence, the order of the base classes matters! When you have to start worrying about complications like this, isn't that a sign that you're taking the whole OO thing a little too seriously? After all, technology is supposed to _solve_ problems, not create them. If the complications of OO are making you lose sight of your original problem, then maybe you should put them aside. -- http://mail.python.org/mailman/listinfo/python-list
Re: Multiple hierarchie and method overloading
Thanks, I'll try that. Philippe Ben Cartwright wrote: Philippe Martin wrote: I have something like this: Class A: def A_Func(self, p_param): . Class B: def A_Func(self): . Class C (A,B): A.__init__(self) B.__init__(self) . self.A_Func() #HERE I GET AN EXCEPTION ... takes at least 2 arguments (1 given). I renamed A_Func(self) to fix that ... but is there a cleaner way around ? When using multiple inheritence, the order of the base classes matters! E.g.: class A(object): def f(self): print 'in A.f()' class B(object): def f(self): print 'in B.f()' class X(A, B): pass class Y(B, A): pass x = X() x.f() in A.f() y = Y() y.f() in B.f() If you want to call B.f() instead of A.f() for an X instance, you can either rename B.f() like you've done, or do this: B.f(x) in B.f() --Ben -- http://mail.python.org/mailman/listinfo/python-list
Re: MySQLdb begin() -
[EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Hi - Feeling a bit weird about this but I cannot find the 'begin' method on a connection object of MySQLdb. Can anyone explain why ? I'm using version 1.2.0 which is pretty recent and I've read that 'begin' should be a method of connection but it's not there ! Feeling pretty puzzled ! What exactly do you expect a begin method to do? Have you read this: http://www.python.org/dev/peps/pep-0249/ -- Geoff -- http://mail.python.org/mailman/listinfo/python-list
Re: Hooking things up in GUI application
Ryan Ginstrom wrote: Behalf Of sturlamolden If you use PyGTK (it also runs on Windows), you can design the GUI with GLADE and then use libglade to import the gui as an xml-resource. Yes, I've tried something similar with wxGlade. Nice, but it doesn't seem to remove the most tedious work -- hooking up handlers (although it does help here, at the cost of some behind-the-scenes magic), It does, there is just *one* line of code for hooking up all the handlers: win.signal_autoconnect(something) That is one line of code for the entire window, not one line of code for every widget in the window. Even if your window contains 100 widgets (buttons, sliders, menus, etc), this hooks up the handlers for every one of them. You just call .signal_autoconnect once. This single line of code does the job of all the message map macros you would write in MFC, Fox and wxWidgets. signal_autoconnect does what it says, it autoconnects the signal handlers. How can that be tedious? Here is an advice: just be lazy. In particular: * Don't create write a dictionary mannually and feed it to signal_autoconnect. Many tutorials do that. It is silly: it is tedious, it is superfluous bloat, and the job has in fact aldready been done. Write a class instead. Guido has made sure every class has a dictionary. Just make sure you have class methods with names corresponding to the signals. Pass a class reference to signal_autoconnect. * Don't grab references for every widget out of the xml. I've seen done that in many tutorials too. It is silly. Just ask the xml for a reference when you need one. The xml resources will store the widget references for you, you don't need to save them anywhere else. Storing a hundred widget references as class variables is tedious and superfluous work, and does not do anything except bloating and slowing your code. and getting data into and out of GUI widgets. It does not save you the job of writing the GUI handlers! It saves you the job of coding the GUI (delegate that job to a graphical designer!) and hooking up the handlers. But you still need to *write* the handlers. That's the kind of boilerplate code that makes GUI development a pain in my opinion -- the actual GUI design/layout isn't so bad, especially with the spacer layout concept. At least you get the GUI design out of the rest of your code. The application logic still need to be there. -- http://mail.python.org/mailman/listinfo/python-list
Re: MinGW and Python
sturlamolden [EMAIL PROTECTED] wrote: Robert Kern wrote: Dunno. Depends on the machine. Depends on the program. Depends on how the interpreter and any extension modules and underlying libraries were built. Depends on which Linux and which Windows. I'm sorry, but your question is a non sequitur. I don't understand its relevance to this thread. The relevance: Python is built with GCC on Linux. Do you or do you not see a performance hit on Linux? MinGW is GCC. Will you get a performance hit when building Python with MinGW? I cannot predict this, though it would be great if somebody who does have both VS2003 and mingw could give it a try. What I did just post on another thread over the last couple of days is about MacOSX, which also uses gcc: 14% faster pybench using Python 2.4.3 under Win2000 under Parallels Workstation beta, compared to 2.4.3 Universal directly on MacOSX -- the standard build of 2.4.3 in either cause, i.e., the one built with MS compilers on Windows, vs the one built with Apple's gcc on MacOSX. Alex -- http://mail.python.org/mailman/listinfo/python-list
Re: MinGW and Python
sturlamolden [EMAIL PROTECTED] wrote: Robert Kern wrote: - gcc does not optimize particularly well. That is beyond BS. The more recent gcc releases optimize as well as any commercial compiler. GCC 4 may even optimize better than MSVC. GCC is the compiler used to build the Linux kernel and MacOSX. If it can deal with this I say it can handle Python as well. My guess is you will not notice any performance difference for the Python interpreter. That is quite possible, of course: if, for example, the 14% speed difference I measured with pybench is representative, then you might not notice it because human beings have a hard time noticing time differences of that magnitude. But it might still be there, easy to measure, even though not to notice. At the same time, if the 14% slowdown is representative, then it's not true that the compiler responsible for it optimizes as well as the other; indeed, does not optimize particularly well, under such a hypothesis, would be far from a beyond BS assertion. Alex -- http://mail.python.org/mailman/listinfo/python-list
Re: Hooking things up in GUI application
Ryan Ginstrom wrote: Yes, I've tried something similar with wxGlade. But GLADE is not wxGlade :-) wxGlade is a GUI designer for wxWidgets and wxPython. It looks a bit like GLADE on the surface, but does not share any code with GLADE. GLADE is a GUI designer for GTK, gtkmm, Mono, GNOME and PyGTK. http://glade.gnome.org/ http://www.pygtk.org/ http://www.mapr.ucl.ac.be/~gustin/win32_ports/ -- http://mail.python.org/mailman/listinfo/python-list
Re: OOP / language design question
Duncan Booth wrote: In other words, the object is constructed in Python before any __init__ is called, but in C++ it isn't constructed until after all the base class constructors have returned. That's true. Good point. Carl Banks -- http://mail.python.org/mailman/listinfo/python-list
Re: python application ideas.
Anthony Greene [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Hello, I know this isn't really a python centric question, but I'm seeking help from my fellow python programmers. I've been learning python for the past year and a half, and I still haven't written anything substantial nor have I found an existing project which blows my hair back. Python is my first language, and I plan on learning lisp within the next week but before I do so I'd like to write something meaningful, does anyone have any suggestions? Something they always needed, but never got around to writing it? Without an imagination you pretty much stagnate your whole learning process. Thanks in advance. Just what is it, other than programming, that you have expertise in? What kind of problems do you know how to solve? Without an imagination you pretty much stagnate your whole learning process. So true! Unfortunately, no one can provide you with one. You have to develop that yourself. Tis the conundrum of programming in general. If all you know how to do is write code - then you truly have nothing to do. What *other* interests do you have? Hobbies? Job Skills? What *does* blow your hair back ;-) That's where your programming ideas need to come from. Thomas Bartkus -- http://mail.python.org/mailman/listinfo/python-list
Re: Zope 3
Derick van Niekerk wrote: I love Python! Then I was introduced to Zope by freak accident. While Zope looked like the answer to my dillemma, I still can't get my head wrapped around it. Is it because I don't know Python well enough? Or is it just that difficult to learn? I've been hacking Python now for 6 years. I just picked up Zope last month and found the learning curve to be quite steep. It's not just you. There's a lot of stuff there. I would like to start my next web project (a database of demographic info on scientists in Africa) on Zope 3. Could anybody point me in the right direction? Where should I start? After you look through the tutorial (which is simply a Zope product you can add from the main page of the ZMI (Zope Management Interface), have a peek at the Zope book (http://www.zope.org/Documentation/Books/ZopeBook/2_6Edition/view). Don't worry about the version (2.6) of the book. It's the latest they have (I think they're working on a new one for z3). You can skip the bits about DTML, but keep them handy. You should also take a look at the Zope user list: http://mail.zope.org/mailman/listinfo/zope Hope this all helps. -- Steve Juranich Tucson, AZ USA -- http://mail.python.org/mailman/listinfo/python-list
Re: OOP / language design question
Duncan Booth wrote:
bruno at modulix wrote:
Duncan Booth wrote:
(snip)
Usually though, if a subclass doesn't immediately call the base class
constructors as the first thing it does in __init__ it indicates poor
code and should be refactored.
Not necessarily. It's a common case to have some computations to
do/some attributes to set in the derived class's __init__ before
calling the superclass's.
I did only say 'usually'. Can you actually think of any good examples where
you have to set a derived attribute before you can call the base class
constructor?
class Base(object):
def __init__(self, arg1):
self.attr1 = arg1
self.dothis()
def dothis(self):
return self.attr1
class Derived(Base):
def __init__(self, arg1, arg2=0):
self.attr2 = arg2
Base.__init__(self, arg1)
def dothis(self):
return self.attr1 + self.attr2
(snip)
Perhaps if the base __init__ calls an overridden
method, but at that point it sounds to me like something wants refactoring.
Why so ? This is a well-known pattern (template method). I don't see
what's wrong with it.
I can think that you might have to do some computations to calculate
parameters for the base __init__, but that is a separate issue.
--
bruno desthuilliers
python -c print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in '[EMAIL PROTECTED]'.split('@')])
--
http://mail.python.org/mailman/listinfo/python-list
Re: Zope 3
Benji York wrote:
bruno at modulix wrote:
Zope is a world in itself - and is certainly not the simplest tool to
learn (nor the most pythonic).
Those statements apply more to Zope 2 than Zope 3 (and Zope 2 is moving
more and more toward Zope 3 these days). One of Zope 3's main goals was
to focus on the Python programmer as a primary target. That being said
there /are/ some powerful and novel concepts used in Z3 (the component
framework).
While it's true that Zope3 is more 'python-programmer oriented' than
Zope2 - and probably much safer wrt/ developper's sanity -, it's still a
world on it's own, it's still a complex framework, and it's still not
very pythonic (IMHO based on 2+ years experience with Zope2, with or
without the CMF, and some time spent evaluating Zope3).
You may want to consider other options like Django, Pylon or Turbogears.
It's true that Z3 is not currently focused very well on the
middle-class developer.
That's an understatement !-)
It's more of an industrial-strength kind of
thing, but considerable thought has been given lately on how to build
bridges so everyone can benefit without being full-time Zope masters.
Toward that end, I wrote a little quick start guide that might help the
OP: http://www.benjiyork.com/quick_start
--
bruno desthuilliers
python -c print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in '[EMAIL PROTECTED]'.split('@')])
--
http://mail.python.org/mailman/listinfo/python-list
How do I open a mysql database with python
How do I open a mysql database with python. I nead a module that is compatible with windows, and will be on any regular server I singup with. if you could give me some documentation on the module that would be good also. Thanks -- http://mail.python.org/mailman/listinfo/python-list
