🌐 Mailman 3 September 2007 - Python-list - python.org

Re: looking for ocbc example
by jay graves Nov. 28, 2007

Nov. 28, 2007

On Sep 21, 2:43 am, Tim Golden <m...(a)timgolden.me.uk> wrote: > Carl K wrote: > > It seems there are 2 odbc modules - pyOdbc and mxOdbc - anyone know the difference? > > In short, pyodbc is open source; mxOdbc requires a commercial license. > pyodbc is a newcomer, but appears to work for everything I've thrown > at it (which is not much). mxOdbc has been around longer, and is sure > to be a more mature product. It may offer more features & functionality. There is also a brand new module 'ceODBC'. http://ceodbc.sourceforge.net/ I haven't used it yet but I want to give it a try. ... Jay

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Get Only the Last Items in a Traceback
by gregpinero＠gmail.com Nov. 9, 2007

Nov. 9, 2007

I'm running code via the "exec in context" statement within a much larger program. What I would like to do is capture any possible errors and show a pretty traceback just like the Python interactive interpreter does, but only show the part of the traceback relating to the code sent to exec. For example here is the code I'm using: try: exec code except Exception,Err: traceback.print_exc() Which gives me something like this when it catches an exception: Traceback (most recent call last): File "/....py", line 843, in run semi_safe_exec.safe_eval(code.replace('\r',''),context,5) File ".....py", line 400, in safe_eval exec_timed(code, context, timeout_secs) File ".....py", line 353, in exec_timed exec code in context File "<string>", line 7, in ? File "<string>", line 5, in func2 File "<string>", line 2, in func1 ZeroDivisionError: integer division or modulo by zero What I want to print instead is just something like: Traceback (most recent call last): File "<string>", line 7, in ? File "<string>", line 5, in func2 File "<string>", line 2, in func1 ZeroDivisionError: integer division or modulo by zero Thanks in advance for the help. -Greg P.S. if it matters, for this example, code in exec code is: def func1(): print 7/0 def func2(): func1() func2()

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Help for Otsu implementation from C
by azrael Nov. 7, 2007

Nov. 7, 2007

Can somone look at this def otsu(hi): fmax=-1.0 border=len(hi) for i in range(border): if hi[i]!=0:break for j in range(border-1,0-1,-1): if hi[j] != 0:break s = sum([k*hi[k] for k in range(border)]) n = sum(hi) # product(im.size) n1=n2=csum=0.0 for k in range(i,j): n1 += hi[k] n2 = n - n1 csum+= k * hi[k] m1 = csum/ n1 m2 = (s - csum)/n2 sb = n1 * n2 * (m2 - m1) if sb > fmax: fmax = sb V=k+1 print V I try to implement it from C from this location. http://www.google.com/codesearch?hl=de&q=+otsu+threshold+show:3rXPo8eEzw0:z… It gives me till now the closest threshold value but still not the exact Testing Histogram given to the function as an atribute is: hi = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 2, 0, 0, 2, 1, 2, 0, 1, 3, 3, 3, 3, 1, 3, 1, 3, 5, 2, 3, 3, 3, 6, 3, 4, 5, 4, 9, 6, 11, 6, 10, 3, 11, 9, 9, 12, 22, 18, 34, 22, 28, 32, 25, 34, 38, 34, 54, 65, 106, 160, 167, 203, 282, 364, 446, 637, 816, 1022, 1264, 1456, 1646, 1753, 1845, 1922, 2203, 2231, 1973, 2245, 2369, 2349, 2258, 2130, 2066, 1835, 1640, 1554, 1414, 1179, 1024, 974, 938, 838, 785, 756, 803, 921, 952, 865, 722, 625, 608, 547, 498, 412, 438, 408, 413, 415, 339, 366, 330, 320, 293, 315, 368, 411, 434, 500, 531, 538, 552, 665, 811, 869, 998, 1021, 1075, 1080, 1030, 934, 926, 1074, 942, 941, 1014, 1440, 2966, 5301, 2729, 3400, 5563, 13096, 9068, 6045, 2813, 686, 180] it gives me 221 value but it should give me 218 Thanks in advance

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Re: PyImport_ImportModule/embedding: surprising behaviors
by Ziga Seilnacht Oct. 25, 2007

Oct. 25, 2007

David Abrahams wrote: > I'm seeing highly surprising (and different!) behaviors of > PyImport_ImportModule on Linux and Windows when used in a program with > python embedding. > > On Linux, when attempting to import a module xxx that's in the current > directory, I get > > ImportError: No module named xxx > > I can work around the problem by setting > > PYTHONPATH=. Python puts the current directory in sys.path only if it can't determine the directory of the main script. There was a bug on Windows that always added current directory to sys.path, but it was fixed in Python 2.5. This is documented in the library reference: http://docs.python.org/lib/module-sys.html#l2h-5149 > On Windows, I get: > > 'import site' failed; use -v for traceback > > I can work around the problem by setting PYTHONPATH to point to the > python library directory: > > set PYTHONPATH=c:\Python25\Lib This happens because Python calculates the initial import path by looking for an executable file named "python" along PATH. You can change this by calling Py_SetProgramName(filename) before calling Py_Initialize(). This is documented in API reference manual: http://docs.python.org/api/embedding.html That page also describes a few hooks that you can overwrite to modify the initial search path. They are described in more detail on this page: http://docs.python.org/api/initialization.html HTH, Ziga

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Python tickets summary
by Facundo Batista Oct. 23, 2007

Oct. 23, 2007

People: I modified my tool, whichs makes a summary of all the Python tickets (I moved the source where the info is taken from SF to our Roundup). In result, the summary is now, again, updated daily: http://www.taniquetil.com.ar/facundo/py_tickets.html Enjoy it. Regards, -- . Facundo Blog: http://www.taniquetil.com.ar/plog/ PyAr: http://www.python.org/ar/

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Python script for mobile platforms -- suggested?
by Robert Dailey Oct. 19, 2007

Oct. 19, 2007

Hi, I'm currently developing a game for a cell phone. The game has a GUI system that's currently using XML to define the individual menus. Basically this means that for every single menu the user goes to, it loads and parses an XML file. Would using Python Script instead of XML be a reasonable replacement, or would it be even slower? I've read various articles online but I'm still curious to hear what everyone has to say here. Thanks.

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The Modernization of Emacs
by Xah Lee Oct. 12, 2007

Oct. 12, 2007

[this post is a excerpt from The Modernization of Emacs, Xah Lee, 2006-04 at http://xahlee.org/emacs/modernization.html ] The Modernization of Emacs ---------------------------------------- THE PROBLEM Emacs is a great editor. It is perhaps the most powerful and most versatile text editor. And, besides text editing, it also serves as a email application, newsgroup application, ftp application, irc application, web browser, shell interface, file management application, programable calculator, calendar and personal info management application, lisp language system, among other things. These seemingly wild functionalities are employed in production daily by a significant number of programers around the world. Some calls emacs as a Operating System as a joke. (Technically it does not qualify because a OS implies management of hardware.). If emacs is such a great and powerful text editor why almost nobody knows about it? Vast majority of people who need to write will be more than happy to use editors other than emacs. Ask a Microsoft Windows user. She'll be more than happy to use Microsoft Word↗. If he doesn't have MS Word, he'll use NotePad↗ or WordPad↗. If he is a programer, most will be more than happy to use any of other graphical editors on the Windows platform or any of the Integrated development environment↗. Same is true on other operating systems, and new editors spring up here and there even though they don't have as much power or flexibility as emacs. For example, there are NEdit, JEdit, Eclipse, Xcode↗ , or the various associated with languages or third party language software, such as Visual Basic or Borland C++. Many reasons can be made out of this. For example, emacs is not bundled on popular operating systems such as Windows or Mac, which are used by some 99% of computer users worldwide. Windows and Mac both have simple text editors bundled that will satisfy majority of computer users, which are non-professional computer users. (NotePad and WordPad on Windows, TextEdit↗ on Mac) For the few professional computer users, a majority will need a easy to use, yet powerful editor that also does styled text, formatting, and sundry light publishing needs such as table layout, simple line graphics drawing, embedded images, math formulas. They will choose and adopt Microsoft Word for their needs. The tiny percentage that might be interested in emacs, are programers. Even among professional programers, a majority shy away from emacs. A major difficulty among programers who do not use or like emacs, is that emacs's user interface is rather esoteric, involving arcane terminologies and keystrokes. This is in sharp contrast to the thousands of software applications used today, where their User Interface are similar and familiar to today's computer users. ---------------------------------------- THE COMMON USER INTERFACE The following is a excerpt from the Wikipedia article on Common User Access↗: CUA was a detailed specification and set strict rules about how applications should look and function. Its aim was in part to bring about harmony between MS-DOS applications, which until then had implemented totally different user interfaces. Examples: * In WordPerfect, the command to open a file was [F7], [3]. * In Lotus 1-2-3, a file was opened with [/] (to open the menus), [W] (for Workspace), [R] (for Retrieve). * In Microsoft Word, a file was opened with [Esc] (to open the menus), [T] (for Transfer), [L] (for Load). * In WordStar, it was [Ctrl]+[K]+[O]. * In Emacs, a file was opened with [Ctrl]+[x] followed by [Ctrl]+ [f] (for find-file). Some programs used [Esc] to cancel an action, some used it to complete one; WordPerfect used it to repeat a character. Some programs used [End] to go to the end of a line, some used it to complete filling in a form. [F1] was often help but in WordPerfect that was [F3]. [Ins] sometimes toggled between overtype and inserting characters, but some programs used it for “paste”. Thus, every program had to be learned individually and its complete user interface memorized. It was a sign of expertise to have learned the UIs of dozens of applications, since a novice user facing a new program would find their existing knowledge of a similar application absolutely no use whatsoever. ---------------------------------------- SIMPLE CHANGES In the following, i describe some critical changes that are also very easy to fix in emacs. If emacs officially adopt these changes, i think it will make a lot people, at least programers, like emacs and choose emacs as their text editor. * Change the keyboard shortcut of Copy & Paste to ctrl-c and ctrl- v as to be the same with all modern applications. * Change the undo behavior so that there is a Undo and Redo, as the same with all modern applications. * Get rid of the *scratch* buffer. * Change the terminology of “kill” to “cut”, and “yank” to “paste”. * Change the terminology of Meta key to Alt. * Make longlines-mode the default editor behavior for any file. Things emacs should do now, even though it eventually will do. * When opening a HTML document, automatically provide highlighting of HTML, CSS, and Javascript codes. Similarly for other multi-language files such as PHP, JSP, et al. This behavior must be automatic without requiring user to customize emacs. Possible Documentation Change Proposals * Reduce the use of the word “buffer” in the emacs documentation. Call it “opened file” or “unsaved document”. * Switch the terminology of Window and Frame so it is more standard. That is, Emacs's “Window” should be called Panes or Frames. While Emacs's “Frame” should be termed Window. * Change the terminology of keybinding to “keyboard shortcut” in emacs documentation. Use the term keybinding or binding only in a technical context, such as in elisp documentation. Xah xah(a)xahlee.org ∑ http://xahlee.org/

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Can I overload the compare (cmp()) function for a Lists ([]) index function?
by xkenneth Oct. 11, 2007

Oct. 11, 2007

Looking to do something similair. I'm working with alot of timestamps and if they're within a couple seconds I need them to be indexed and removed from a list. Is there any possible way to index with a custom cmp() function? I assume it would be something like... list.index(something,mycmp) Thanks!

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Launch file from Python
by jocago＠gmail.com Oct. 10, 2007

Oct. 10, 2007

Good afternoon from someone who is trying to learn Python. I would like to launch an app from within a Python script. From the examples I have found, I should be able to do this with os.system. I use this: os.system("xplanet-1.2.0/xplanet.exe -fontsize 24 -label -target earth -lat 33.65 -lon -84.42 -radius 40 -num_times 1 -tmpdir .") This is copied directly from the .bat file that launches the xplanet app. It works there. and get this: 1 Can someone fill me in? Thanks.

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Re: Symbolic Link
by mosscliffe Oct. 10, 2007

Oct. 10, 2007

On 22 Aug, 00:05, Ian Clark <icl...(a)mail.ewu.edu> wrote: > Hyuga wrote: > > On Aug 19, 4:29 pm,mosscliffe<mcl.off...(a)googlemail.com> wrote: > >> The source file is in an area which python can see, but not the > >> browser. I am trying to make a link in a browser friendly area so I > >> can use it to display an image file. > > > You might want to try using an .htaccess file. Place a file > > called .htaccess in the "browser friendly area" and place in it the > > line: > > > Options +FollowSymLinks > > > Assuming your hosting service will allow that, then it should work. > > If not, then why not just copy the image files? Storage is cheap > > these days. > > > Hyuga > > My question would be why a symbolic link? Why not a hard link? Are the > two directories on different mount points? After the script finishes > does python need to see that image file again? Why not just move it? > > Ian I just imagined a symbolic link would be quicker. I have tested a hard link now and it seems to work fine. I am deleting the link/s at the end of the session/s. I think a link is better than a move, because there is always a possibility I might somehow delete the moved file and then I would lose the original one. Thanks for your help. Richard

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