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

Re: PyQt with embedded python in Qt App
by Diez B. Roggisch Nov. 2, 2007

Nov. 2, 2007

Bart. schrieb: > Thursday 01 of November 2007 23:32:02 Phil Thompson napisał(a): >> On Thursday 01 November 2007, Bart. wrote: >>> Thursday 01 of November 2007 15:13:55 Phil Thompson napisał(a): >>>> On Thursday 01 November 2007, cgrebeld wrote: >>>>> Is it possible for a Qt C++ application, which embeds the python >>>>> interpreter, to import and use PyQt? There can be only one >>>>> QApplication, which is created in the C++ side, so how would I use >>>>> that from the python side? >>>> QtGui.QApplication.instance() >>> What I can do with this pointer? >> It's not a pointer, it's a Python object that wraps the C++ pointer. > > So how to pass this object into embeded python interpreter (executed script)? > Anyone know any example? You don't pass it, you _retrieve_ it in the embedded interpreter by invoking the code given to you. Diez

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Use of while(1) with app.mainLoop of wxpython
by tarun Nov. 1, 2007

Nov. 1, 2007

Dear All, I've have created a GUI (using wxPython widgets) where in I've a message log window (A TextCtrl window). I've a router.dll that helps me putting in message onto a channel. In my script that generates the GUI, I want to continuously poll the channel and populate the messages from the channel to the message log window. For this I've to put a while (1) loop, but when I do this, the GUI doesn't come up. I see the GUI coming when while(1) is removed. Is there any issue with usage of app.mainloop and while(1) together. Quick help would be really appreciated. Thanks & Regards, Tarun

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looping
by Beema shafreen Nov. 1, 2007

Nov. 1, 2007

hi everbody, i have a file , A_16_P41851056 1730 A_16_P03796992 165 A_16_P21640222 360 A_16_P21640223 240 A_16_P03796993 168 A_16_P41851059 1094 A_16_P21640225 1035 A_16_P03796994 154 A_16_P21640226 1422 A_16_P21640227 1262 A_16_P41851063 107 A_16_P03796995 78 A_16_P03796996 273 A_16_P21640230 687 A_16_P03796997 417 A_16_P21640233 320 A_16_P03796998 205 column 2 of my file has values.... 1730, 165,360.... if i need to put a condition checking that if the first values is greater than the next i have to print the column coresponding to that..... say for example 1730 is greater than 165 so i print column1 value =A_16_P41851056 , but 165 is lesser that both the 1730 and 360 so i omit the value....from column1, and i have to continue the loop till the end of file checking which values is greater the both tom and bottom how do i do it.....

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os.readlink returning value
by Giampaolo Rodola' Nov. 1, 2007

Nov. 1, 2007

I was reading os.readlink doc which says: readlink( path) Return a string representing the path to which the symbolic link points. The result may be either an absolute or relative pathname; if it is relative, it may be converted to an absolute pathname using os.path.join(os.path.dirname(path), result). Availability: Macintosh, Unix. ...It's not clear to me when the returning result could be absolute and when it could be relative. Could someone clarify this point?

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Strange problem when using re module with threads
by Wei Lee Woon Nov. 1, 2007

Nov. 1, 2007

Dear all I've been getting a rather strange problem with the following multithreaded code (reduced to the minimum which still results in the problem): import threading import re class hey(threading.Thread): def run(self): print re.compile("\d+").search("hey95you").group(); thlist=[] for tech in range(2): thlist.append(hey()) thlist[-1].start() for th in thlist: th.join() After saving this to a file (say "test.py"), if I try to run this from the console using "python test.py", it seems to work fine, but when i try to run it from the python interactive shell using "import test", it freezes up (if i don't issue the join() it is fine, though). Any ideas why this is so? Thanks Wei Lee

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Re: AOP and pep 246
by Kay Schluehr Nov. 1, 2007

Nov. 1, 2007

On Nov 2, 5:00 am, "Rustom Mody" <rustompm...(a)gmail.com> wrote: > On 11/1/07, Kay Schluehr <kay.schlu...(a)gmx.net> wrote: > > > AOP was a research that gone nowhere - at least not in its orginal AspectJ form: > > declaring aspect code that targets business code, weaving the aspect code into the > > business app using a code generator. There was much excitement about it around 2001 > > that faded away > > Maybe so but five years maybe too short to decide this. > > Consider that the core ideas of LISP -- interpretation, > garbage-collection, s-exps-as-universal data-structure (now XML) have > taken 50 years to get into the mainstream. > > Of course its also true that the number of dead-end ideas exceeds the successes. > My own guess is that AOP via higher order functions and metaclasses > will be more successful than via aspectj and code-generation. > > In short python will do better than java. And so.. thanks for the link Yes. The methodological apparatus and terminology of AOP was invented for Java or another language that fits cleanly into the OO paradigm of "classes first". Aspects were a complementary modularization mechanism for crosscutting features that did not fit into the "classes first" ideology but were nevertheless modelled after classes. When you look at AspectJ code you will find all kinds of lexical dependencies since aspect code had to determine its join points using code pattern. Very brittle! Now compare this to decorators which do not have to declare where they are applied. You just decorate an appropriate function / method. Since higher order functions give you all this for free there isn't a real need to continue the semiotic legacy of AOP. Note that I actually do believe that code generation will increase in importance but not as an ordinary software engineering technique that provides better modularization of application code. I consider this as a failed idea.

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Configuration Management
by rickyclarke9＠gmail.com Nov. 1, 2007

Nov. 1, 2007

I have found an excellent resource on understanding Windows Application concepts and exam 070-306. http://technical-talk.com/mc/mcsd/mcsd306.asp

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Re: AOP and pep 246
by Michele Simionato Nov. 1, 2007

Nov. 1, 2007

On Nov 2, 5:00 am, "Rustom Mody" <rustompm...(a)gmail.com> wrote: > > Seehttp://www.python.org/dev/peps/pep-3119 > > Thanks Michele. But there are a couple of questions on this: > > a. Does one have to use python 3000 for this? I expect ABC's to be backported to Python 2.6, but it is probably possible to backport them down up to Python 2.2. > b. Are there more example-oriented writings on this (such as the > papers you and mertz wrote on this stuff within the older paradigm Not that I know of (except posts in python-dev). > c. Where does peak stand today? My understanding is that P.J. Eby has no time to follow PEAK fully; his idea is to extract the most useful ideas from PEAK (you may know that eggs and WSGI originated from PEAK) and to make them available to the community as separated packages. IOW, PEAK as a monolithic framework had no success, but pearls of PEAK are having an enormous impact. This is yet another example of "simple is better than complex" and the ultimate reason why AOP a la Java was a dead idea from the beginning. Too invasive. If you want to have success, you must start from simple things. Michele Simionato

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choose from a list
by barronmo Nov. 1, 2007

Nov. 1, 2007

I'm new to programming and even newer to Python and would be grateful for some help on what has been a tough problem for me. The project I am working on is an electronic medical record using MySQL/Python. I'm currrently working on a module that looks up a patient's name based on input from the user. My goal is a lookup based on the first 2 or 3 letters of the patient's last name. The matching results would appear as numbered choices so that the user would choose only a number to then access various parts of the patient's record. The results might look like this for user input "smi": 1 387 John Smith 2 453 Jane Smith 3 975 Joe Smithton Here is a copy of what I have so far, name_lookup.py: import MySQLdb def name_find(namefrag): conn = MySQLdb.connect(host = "localhost", user = "root", passwd = "n85", db = "meds") cursor = conn.cursor(MySQLdb.cursors.DictCursor) cursor.execute("SELECT patient_ID, firstname, lastname FROM demographics WHERE lastname LIKE '"+ str(namefrag)+"%'") results = cursor.fetchall() for row in results: print "%s %s %s %s" % (row["patient_ID"], row["firstname"], row["lastname"]) cursor.close() conn.close() Thanks in advance for any help. Mike

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Re: AOP and pep 246
by Michele Simionato Nov. 1, 2007

Nov. 1, 2007

On Nov 1, 4:18 pm, "Rustom Mody" <rustompm...(a)gmail.com> wrote: > I am interested in AOP in python. From here one naturally (or > google-ly) reaches peak. > But peak seems to be discontinued. > Whereas pep-246 on adaptors seems to be rejected in favor of something else. > > What?? > > Can someone please throw some light on whats the current state of the art? See http://www.python.org/dev/peps/pep-3119 Michele Simionato

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