🌐 Mailman 3 August 2006 - Python-list - python.org

Jumping over in the class hierarchy
by Pupeno Aug. 2, 2006

Aug. 2, 2006

Hello, I want to jump over a method in the class hierarchy, that is: If I have class A(object), clas B(A), class C(B) and in C, I want a method to do exactly what A does but not what B does in its reimplementation, would it be correct to do: super(A, super(B, self)).method() in C ? Thank you. -- Pupeno <pupeno(a)pupeno.com> (http://pupeno.com)

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wxPython - Event processing order arbitrary across platforms?
by Conrad Aug. 2, 2006

Aug. 2, 2006

Greetings, For user actions on a wxWidget that trigger multiple events for that wxWidget, is the order those events are processed in undefined, and therefore arbitrary from one platform (ie Windows) to the next (ie Linux)? Specifically, I have a convience aggregate class that combines a wxStaticText with a wxComboBox, as I often need those two at the same time. The aggregate catches events from the wxComboBox and stores them in it's own class. The calling parent then catches the event, uses the stored values and set's any variables and does any processing it needs. But I had a slight bug, which I didn't catch until a recent upgrade. Suddenly, this technique still worked under windows - and didn't under Linux. The bug? the wxComboBox and the parents were catching two different events - oops. (I was catching the EVT_COMBOBOX in the child widget - and EVT_TEXT in the parent methods - thanks to cut'n'paste an error I managed to propagate through most of my code. Duh) The reason the Windows version works, is because apparently the EVT_COMBOBOX is processed first. By the time the parent catches the EVT_TEXT evt, the aggregate widget has already caught the EVT_COMBOBOX and set its local values. Under Linux, however, it appears that the EVT_TEXT is processed first - before the aggregate catches the EVT_COMBOBOX and has had a chance to set it's values - boom. Hence the above question. I know that the event propagation for any single event is pretty well defined, crawling up through the superclasses, and for wxCommand- derived events, up through the container heirarchy. But I really haven't found any docs that guarantee which events are processed first when a user action fires multiple events. My bug is fixed - but curiosity and coding go hand in hand. Cheers, Conrad

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special charater in file causing trouble
by Thomas Thomas Aug. 2, 2006

Aug. 2, 2006

Hi All, I need to process a file to create a hash.. the file contain a section similar to string MetaDataPrompt = "Discovery No"; string MetaDataFieldName = "Discovery No"; string MetaDataType = "string"; string MetaDataValue = "£500"; everything was working fine until recently I got an error and found that it is due to "£" character and the error generated when processing the hash ascii' codec can't decode byte 0xa3 in position 0: ordinal not in range(128) I assume that this happening because the hash values I have are asciii encoded and I need to convert to unicode somehow.. i tried some googling and found http://www.jorendorff.com/articles/unicode/python.html with not much luck in getting it work in my case. metaValue=unicode('fieldValues[1], errors='ignore') this will make the code work but i looses the "£" , I know that how it supposed to work is there a way to handle such a situation in python code snippet def _readXSTFilePoll(filename): metaHash={} if exists(filename): if isfile(filename): f = open(filename, "rb") #infile = codecs.open(filename, "rb", encoding="utf-16") #text = infile.read() for line in f: if (line.find("string MetaData") >1): metaSubHash={} while(line.find("string MetaData")>1): fieldValues=line.split('"') extendedMetaKey=fieldValues[0].strip(); metaValue=fieldValues[1] print metaValue metaKeySplit=extendedMetaKey.split(' ') metaKeyList=metaKeySplit[1].split('MetaData') metaKey=metaKeyList[1] metaSubHash[metaKey]=metaValue if (metaKey=='Prompt'): hashKey=metaValue hashKey=hashKey.upper() line=f.next() metaHash[hashKey]=metaSubHash print "one section over" print filename,metaHash return metaHash else: return {} print "I cannot see a file of this name" else: return {} Thanks ----------------------------------------------------- Thomas Thomas thomas(a)mindz-i.co.nz Phone. +64 7 855 8478 Fax. +64 7 855 8871

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Re: Multiple Telnet sessions through one script
by claird＠lairds.us Aug. 2, 2006

Aug. 2, 2006

In article <mailman.8736.1154360907.27775.python-list(a)python.org>, Carl J. Van Arsdall <cvanarsdall(a)mvista.com> wrote: >Well, although you spawn seperate telnet processes there is still only >one thread of control in your pythons script. If you need to do two >things simultaneously you'll need to setup a parallel control >mechanism. For example you could use python threads, each thread spawns >a separate telnet and controls it accordingly. Similarly, you could >fork off other python scripts that control each telnet session. > >Alright, so that's for controlling two telnets at once. I think you'll >have another problem, and that's controlling each telnet session >manually. To do this I think you'll need to setup an interface that >provides the two consoles you are after. I'm not exactly sure the best >way to do that. One thought I have is if you used one of the various >GUI toolkits you could have your app open a window that is seperated >into two consoles. Each thread could be bound to one of these consoles >and you could switch between the two by clicking on one side versus the >other. Although if you want to do it all in a shell, or have your >program open multiple shells I'm not sure how to do that, you might >check google. I suppose if you were doing things from a single shell >and wanted to do thing similar to the GUI toolkit I described earlier, >you could try something like ncurses. > >I guess I have one final idea, you could use a single shell, buffer >output from each telnet session and have your main control loop give you >the ability to switch back and forth between the two sessions. > >Anyhow, hope those ideas help you out a little. > >vmalhotra wrote: >> Hi >> >> I am new in python scripting. I want to open a Multiple telnet session >> through once script. In other way i can tell i want to open two linux >> consoles through one script. >> >> I wrote one script, but the issue is I am not able to open multiple >> consoles. The Scripts which i wrote is as follows: >> >> import pexpect >> session = pexpect.spawn("telnet localhost 2601\n") >> session.expect("Password: ") >> session.send("XYZ\n\n") >> session.expect("Router1> ") >> session1 = pexpect.spawn("telnet localhost 2604\n") >> session1.expect("Password: ") >> session1.send("ABCD\n\n") >> session1.expect("ospfd> ") >> #session1.interact() >> session1.interact() >> >> output : >> ospf> >> >> But in this case, i want in one console router one can open and on >> other console ospf should open. But this i want to do is through one >> script only. . . . While pexpect makes these matters feasible, the Tcl-based Expect <URL: http://wiki.tcl.tk/expect > has had years more practice dealing with concurrency and its consequences. If this problem were mine, I'd start with Expect.

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Re: Get age of a file/dir
by Jim Aug. 2, 2006

Aug. 2, 2006

Carl J. Van Arsdall wrote: > I've been looking around the OS module and I haven't found anything > useful yet. Does anyone know how to get the age of a file or directory > in days? I'm using unix and don't seem to find anything that will help > me. The only function that comes close so far is > > os.path.getctime(path) > > > However this only gets creation time on Windows, on Unix it gets the the > time of the last change. Any ideas? > > Thanks! > > -carl > > -- > > Carl J. Van Arsdall > cvanarsdall(a)mvista.com > Build and Release > MontaVista Software Hi, You should check out the datetime module. And convert dates to an ordinal number. today = datetime.date.today().toordinal() age = today - datetime.date(year, month, day).toordinal() Jim

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Re: Reinstalling Python Problem (Newbie)
by Avell Diroll Aug. 1, 2006

Aug. 1, 2006

beno wrote: > It's been years since I've done this. I had a programmer working for me > who disappeared one day, and now I'm taking over his responsibilities. I > need to re-configure Apache for mod_python which means I have to rebuild > python. I'm working with the latest distro. I'm heavily dependent on > zope, so all this has to work together. Platform is FreeBSD 5.? I have > the following questions: > > What is meant by pointing to this folder thus: > ./configure --prefix=/usr/python > > When I run make test I get these errors: > *** errors *** > I've googled this with no luck. Please advise what to do or at least how > to start > TIA, > beno I believe this is not the best place to ask your question, ... you should try : * the mod_python mailing list : http://www.modpython.org/ * some freebsd resources (e.g. http://www.freebsd.org/community.html ) * some zope resources ( http://www.zope.org/Resources/MailingLists ) A few google hints anyway : http://www.google.com/search?q=freebsd+mod_python+zope&hl=en : http://www.bsdforums.org/forums/archive/index.php/t-1390.html http://www.modpython.org/pipermail/mod_python/2004-June/015722.html http://codespeak.net/pipermail/railroad-dev/2005-April/000049.html http://www.modpython.org/FAQ/faqw.py?req=show&file=faq02.011.htp I don't have any freebsd system right now so I can't test anything, but there's two suggestions from those resources : * put the following lines in /usr/local/sbin/envvars : LD_PRELOAD=/usr/lib/libc_r.so export LD_PRELOAD OR * compile python without thread support There seems to be those kind of question on the mod_python mailing list (even on their FAQ), so I would _strongly_ suggest you to post your next questions about mod_python there. regards Avell

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Re: Windows vs. Linux
by Gerhard Fiedler Aug. 1, 2006

Aug. 1, 2006

On 2006-08-01 16:29:54, Sybren Stuvel wrote: >> - Mac OS: ':' > > It's a slash too, at least on non-obsolete Mac OS versions. I wrote "Mac OS". That's not "Mac OSX". Ask Apple... :) And Mac OSX is quite arguably a Unix-type system. >> Maybe someone else can fill in some of the missing OSes. It doesn't >> seem to look like Windows is the odd man out; it rather seems that >> every type of OS uses its own separator. > > You can put a whole lot of OSses under "Unix-type", but actually it's > more like this: Well, you could list a number of DOS versions, too. Doesn't help the fact that the slash is mainly on Unix-type systems, and that there are or were quite a number of other systems out there that use other separator characters. >> (URLs probably use the slash because the internet protocols have been >> developed largely on Unix-type systems for use with Unix-type systems?) > > It wasn't designed specifically for Unix-type systems, but for universal > access. Right... the URI/URL syntax was formalized in the early 90ies, when Unix-type machines were dominant on the internet. There are also quite a number of concerns that governed the choice of separators and escape characters for URLs that the IBM, Microsoft and DEC/VMS people couldn't really foresee in the 70ies (for example, when DEC and IBM started to use the slash as command line switch character -- which later precluded its use as path separator). > My point also was that a lot of programming languages use the backslash > as escape character. This has been true at least since the sixties. I > think it's a bad design choice from the Microsoft team to pick this > escape character as a path separator. Maybe... have you been involved in the decision? Or do you know what the reasons were? Do you know whether it was even Microsoft's choice? (Remember, they wrote DOS for IBM. And there was nobody who had foreseen the PC explosion.) Did you know that most DOS versions accept the / as path separator? That DOS was written on Xenix (Posix) systems (using the slash as path separator)? That Microsoft was for a long time pretty much a pure Xenix shop? > The problem with the world is stupidity. Right... And most people are /really/ smart 30 years after the fact; "I would have known it better" is about as smart as it gets :) Gerhard

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RE: Programming newbie coming from Ruby: a few Python questions
by Delaney, Timothy (Tim) Aug. 1, 2006

Aug. 1, 2006

Edmond Dantes wrote: > Of course, it's all what you really mean by "clever". To me, being > "clever" partly means writing code without bugs in the first place, > so there is nothing that needs debugging!!!!!!!! "Clever" in this context generally means using a trick/hack that is non-obvious (often even after you understand it). "Cleverness" often leads to difficult-to-understand code, which is contrary to the "python philosophy". There are occasionally times when cleverness is useful, but in those cases it should always be commented explaining exactly what it is doing, and why a non-clever solution was not used. Most of the time there's still a better non-clever way to do it, but the coder is not clever enough to find it ;) Tim Delaney

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Get age of a file/dir
by Carl J. Van Arsdall Aug. 1, 2006

Aug. 1, 2006

I've been looking around the OS module and I haven't found anything useful yet. Does anyone know how to get the age of a file or directory in days? I'm using unix and don't seem to find anything that will help me. The only function that comes close so far is os.path.getctime(path) However this only gets creation time on Windows, on Unix it gets the the time of the last change. Any ideas? Thanks! -carl -- Carl J. Van Arsdall cvanarsdall(a)mvista.com Build and Release MontaVista Software

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Coloring tkinter dialogs
by 31337one＠gmail.com Aug. 1, 2006

Aug. 1, 2006

If I use the dialog template for tkinter, how do I go about customizing its color? Thanks

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