🌐 Mailman 3 October 2002 - Python-list - python.org

Re: XML, Unicode
by loewis＠informatik.hu-berlin.de Oct. 1, 2002

Oct. 1, 2002

pcarey(a)lexmark.com writes: > 1) Is it "safe" to use UTF-8 encoding for html pages. (These pages will be > seen by lots of folks around the world.) Yes. Make sure to put a META tag into the HTML, to override any encoding that the web server or browser may guess. > 2) I use codecs.open("filename.html", "w+", "utf8") to create the html > pages, encoded in utf-8; is this correct? Yes. Make sure you don't write byte strings into the stream, only Unicode objects. The only exception are pure-ASCII byte strings, such as tag or attribute names and spacing. > 3) The xml is all utf-8, and it appears that, when building strings, > non-utf8 strings are coerced? You mean, non-Unicode objects? Yes, adding Unicode and byte strings gives a Unicode string; the byte string is converted with the system encoding (ascii). [UTF-8 is a byte encoding; Unicode objects do not use UTF-8 internally, so saying that the "XML is utf-8" is a bit imprecise: it was UTF-8 on disk, but isn't anymore when you process it] > 4) Why do I hafta use '\r\n' for the "Newline character" instead of '\n'? You don't have to; the resulting HTML file will be work just fine with \n only. It is true that codecs.open opens the file in binary mode, so \n is not transparently converted to \r\n. That could be considered as a bug, however, that bug is difficult to fix: normally, you cannot rely on the C library to correctly understand the notion of a newline if the file has a non-native encoding. So there is no instance performing text mode conversions here. > Again, everything seems to work great; I'm just a little gunshy > about royally screwing up. If you have tested your code with various funny characters (including characters not supported in the "native" code page), I think you can declare victory. Regards, Martin

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idea for a much needed application
by rsrchstr＠hotmail.com Oct. 1, 2002

Oct. 1, 2002

I remember a while ago reading about tim burners-lee and how his vision of the WorldWideWeb as a medium where all can freely and easily publish information has not materialized properly, and i felt it so strongly over the past week when trying to look at options for hosting a website. Hosts are either expensive or limit you in terms of what languages, modules, applications, and OSs you can use. They also limit you in terms of space, bandwidth used per period, number of executions of CGIs... etc. Some of those who give good deals, seem difficult to trust with either your credit card number or your content. I wish i can just use my own computer, with whatever technologies I choose, keeping my content that i build up over time safe here on my own machine, but unless you have a broadband connection this is not possible. It may be possible using a dynamic DNS provider, but then again either they add cost, end up with an ugly URL, and, most importantly, there's no way for others to know when you get online. So here comes the idea that occured to me, and i post it here to ask if you know of an application that already provides this functionality, then please tell me what it is, or if you think it is worth doing on an open source basis, or even proprietary, in which case i invite anyone to do so, or if you think it's a completely stupid and impossible idea, then perhaps you can please tell me why. You probably guessed if you read as far as the second paragraph that what i'm thinking about is an application functionality that enables instant messaging to provide the dynamic DNS functionality. So instead of giving others a URL I can just give them an IM username they can add to their client, and when i go online, through my humble dial-up connection that changes IP whenever i log in, they'll be aware of my presence, and be able to connect to a server i host on my machine. It sounds like a simple thing; IM presence, automatic IP query of my username, click on my username and or use a contextual menu option or whatever and a browser launches to go to the site i'm hosting on my machine. Perhaps it can use existing open-source platforms, such as jabber or gnutella, or as an add-on to existing open-source applications/clients. Basically what i'm suggesting is a little tool to enable a server such as apache to join the whole IM/p2p thing and have "presence". The more automated it is, and the easier it is, the better. I think such a functionality will be especially useful for certain uses, in my case it will be hosting a wiki, as i leave my machine online a lot through my dial-up, can't predict the number of executions of CGI or the amount of space needed, wish to be free to use whatever wiki application is best for my needs and in whatever language regardless of what a host will support, and do not wish to pay a monthly fee, extra charges, setup fee or a domain registration. Perhaps there can be other areas where it is useful, and i'm sure there are other areas where it will not be suitable. Perhaps there can also be a simple way to enable a page hosted in such a way to be submitted to search engines, i haven't thought about that yet, but tell me if u see any. What do you think? already done, worth doing, stupid, or impossible? (p.s. please also let me know if there are other newsgroup to which posting this will be a good idea)

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Reloading a module
by Tom Oct. 1, 2002

Oct. 1, 2002

I'm developing some python mini applets on a Mac (using os 9 and the 2.1.1 Python IDE), and I've found it impossible to delete and/or reload a module after making changes to the code during the debugging/verification process. Is there an easy and/or effective way to do this? If I execute: del mymodule and then execute a print dir(mymodule), it shows up as nonexistent. Then, when I execute: import mymodule followed by a print dir(mymodule), the changes do not show up. Thanks for the help. Tom

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Re: Reloading a module
by Tom Oct. 1, 2002

Oct. 1, 2002

In article <mailman.1033441502.25759.python-list(a)python.org>, Jeff Epler <jepler(a)unpythonic.net> wrote: > > As for .pyc vs .py, Python follows these steps when importing a module: > if a .pyc file exists, read the magic number, version, and the > stored timestamp. Compare the version to this Python version, > and the stored timestamp to the .py file's timestamp. If these > both match, or the version matches and the .py file doesn't exist, > use the .pyc file. > otherwise, compile the .py file and rebuild the .pyc file along the way > > The only circumstance that would interfere with this is NFS or another > network filesystem making the check of the timestamp on the .py file > unreliable---i.e., python can fail to detect that the .py file has been > updated, because the OS gives it stale data. Using a filesystem that has > no timestamp at all (or a very granular timestamp, so that two revisions of > "silly.py" could share the same timestamp) could cause the same problem, > though I don't know of any such filesystems offhand. > > (That said, I rarely actually notice problems of this type over NFS) > > It's possible that you've discovered some sort of new problem with the way > .pyc caching or reloading work, but the idea is so simple that I can't see it > failing... > > Jeff > Jeff, Try this: Here's a file called randomclass.py: class randomClass: def printit(self): print "This is rather silly" myRandomValue = "Foo" >>>import randomclass >>> dir(randomclass) ['__builtins__', '__doc__', '__file__', '__name__', 'myRandomValue', 'randomClass'] >>>m = randomclass >>>print m.myRandomValue Foo >>> n = randomclass >>> n.randomClass().printit() This is rather silly Now change the file by removing the line: myRandomValue = "Foo" ...and then save the change. >>> reload(randomclass) <module 'randomclass' from 'randomclass.py'> >>> dir(randomclass) ['__builtins__', '__doc__', '__file__', '__name__', 'myRandomValue', 'randomClass'] Odd...the reference to myRandomValue is still there, and it behaves as though the modification was never made: >>> n = randomclass >>> print n.myRandomValue Foo It doesn't seem like this should be happening. It happens the same on both Linux and the Mac (os 9). Regards, Tom

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XML, Unicode
by pcarey＠lexmark.com Oct. 1, 2002

Oct. 1, 2002

Win2k, Python2.2 Hello gurus. I'm working on a small application that lets users build Web pages from a simple interface. No big deal; user's pick what components they want, fill out a few fields, and choose the languages they need. The XML is parsed and assembled into html pages. Everything is encoded in UTF-8, and everything seems to work pretty well (even the RTL languages, Hebrew and Arabic). My questions (and they might seem dumb) are thus: 1) Is it "safe" to use UTF-8 encoding for html pages. (These pages will be seen by lots of folks around the world.) 2) I use codecs.open("filename.html", "w+", "utf8") to create the html pages, encoded in utf-8; is this correct? 3) The xml is all utf-8, and it appears that, when building strings, non-utf8 strings are coerced? #one of the f(x)s...%<--------- def makeHTML(self, cNode): cText = self.unTagXML(cNode.toxml(), cNode.tagName) cTagStart = "<"+cNode.parentNode.getAttribute("htmlTag")+">" cTagEnd = "</"+cNode.parentNode.getAttribute("htmlTag")+">" cLink = cNode.parentNode.getAttribute("filename") if (len(cLink) != 0): #===>if the component has a filename attribute... cLinkStart = '<a href="'+cLink+'">' cLinkEnd = '</a>' else: cLinkStart = "" cLinkEnd = "" #===>ADDING UTF-8 TO REGULAR OLD STRINGS SEEMS TO WORK JUST FINE... componentString = cTagStart+cLinkStart+cText+cLinkEnd+cTagEnd self.guiFile.write(componentString+'\r\n') 4) Why do I hafta use '\r\n' for the "Newline character" instead of '\n'? Again, everything seems to work great; I'm just a little gunshy about royally screwing up. I've ordered "Unicode: A Primer" (seen it referenced a lot), so hopefully I can get a better understanding of the unicode aspect, but, in the meantime, I thought I'd ask you guys (and gals). Thanks for any input, hope i've been clear on this. PETE

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print images '*.tif'
by Janos Ponusz Oct. 1, 2002

Oct. 1, 2002

does somebody have experience with printing *.tif images with python. thanks for help, janos _________________________________________________________________ Testen Sie MSN Messenger für Ihren Online-Chat mit Freunden: http://messenger.msn.de

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Can't cancel page navigation in PyCom if IWebBrowser2
by Evgeny E. Ivanov Oct. 1, 2002

Oct. 1, 2002

Hello activepython, I'm created handler for event OnBeforeNavigate2 of DWebBrowserEvents2 in my PyCom: # def OnBeforeNavigate2(self, pDisp=defaultNamedNotOptArg, URL=defaultNamedNotOptArg, Flags=defaultNamedNotOptArg, TargetFrameName=defaultNamedNotOptArg, PostData=defaultNamedNotOptArg, Headers=defaultNamedNotOptArg, Cancel=defaultNamedNotOptArg): # """Fired before navigate occurs in the given WebBrowser (window or frameset element). The processing of this navigation may be modified.""" def OnBeforeNavigate2(self, pDisp, URL, Flags, TargetFrameName, PostData, Headers, Cancel): print 'OnBeforeNavigate2: %s\n' % URL Cancel = true But switching Cancel to "true" does't produce desired effect - navigation proceeded successfully In type library this parameter listed as "Pointer BOOL (Flags=3)" -- Best regards, Evgeny mailto:e_e_i@digitalfun.ru _______________________________________________ ActivePython mailing list ActivePython(a)listserv.ActiveState.com To unsubscribe: http://listserv.ActiveState.com/mailman/mysubs Other options: http://listserv.ActiveState.com/mailman/listinfo/ActivePython

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RE: Decimal arithmatic, was Re: Python GUI app to impress the bos s?
by sismex01＠hebmex.com Oct. 1, 2002

Oct. 1, 2002

> > Steve Holden wrote: > > ><sismex01(a)hebmex.com> wrote... > > > > > >[ ... ] > >OK, so don't use whole pennies (or smallest currency) as your > >base, use 10,000ths of a penny, but still use integer arithmetic > >for your calculations. > > > Normal Integers aren't big enough. 2^31 / 10K == 215K. > > --jb > > -- > James J. Besemer 503-280-0838 voice > 2727 NE Skidmore St. 503-280-0375 fax > Portland, Oregon 97211-6557 mailto:jb@cascade-sys.com > http://cascade-sys.com > "Integer arithmetic" != "32-bit integer arithmetic". The first may be based on the second but they are definitely not the same thing. Python longs are memory-limited, yet they are also based on machine integers. Does that make them unsuitable? -gustavo Advertencia: La informacion contenida en este mensaje es confidencial y restringida y esta destinada unicamente para el uso de la persona arriba indicada, Esta comunicacion representa la opinion personal del remitente y no refleja necesariamente la opinion de la Compañia. Se le notifica que esta estrictamente prohibida cualquier difusion, distribucion o copia de este mensaje. Si ha recibido esta comunicacion o copia de este mensaje por error, o si hay problemas en la transmision, favor de comunicarse con el remitente. Todo el correo electrónico enviado para o desde esta dirección será procesado por el sistema de correo corporativo de HEB. Tal correo electrónico esta sujeto a ser almacenado y puede ser revisado por alguien ajeno al recipiente autorizado con el propósito de monitorear que se cumplan las normas de seguridad de la empresa.

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Re: Accessing MySQL *without* using MySQLdb
by William Oct. 1, 2002

Oct. 1, 2002

Skip Montanaro <skip(a)pobox.com> writes: > Luis> I'm writing a few Python scripts for CGI. My hosting company sort > Luis> of supports Python (it has Python 1.5.2 running in the server - > Luis> Red Hat Linux + Apache) and MySQL. However, they are not very keen > Luis> in installing new modules (e.g. MySQLdb). How can I access a MySQL > Luis> database from Python, without installing new modules? Does anyone > Luis> have a few pieces of code that would achieve this? > > The MySQL access in MySQLdb is actually done by the extension module _mysql, > which calls the client library provided by the MySQL folks. > > Can't you install MySQLdb in your own directory tree, then add that to > sys.path at the top of your CGI script? You should be able to install it > using something like > > python setup.py --prefix=/home/luis/local It's also possible to install it on it's own linux and copy the directory of mysqldb, _mysql.so and _mysql_exceptions.py I did it on a webhosting where is only python1.5 (redhat server :((() and not ssh If you want a copy of theses binary, contact me. -- William Dodé - flibuste.net http://wikipython.tuxfamily.org

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viewCVS on win98
by Rob Hall Oct. 1, 2002

Oct. 1, 2002

Has anyone had any luck getting viewCVS to work on W98? I am getting too many errors to detail, so just wondering if someone has had success, and if so, some pointers to get it working. Rob

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