🌐 Mailman 3 October 2005 - Python-list - python.org

Re: Class Help
by Jean-François Doyon Oct. 1, 2005

Oct. 1, 2005

You have to crate an instanciation of the class before you can use one. So you want to do: instance = Xyz() instance.y() You won't get any output though, might want to do: class Xyz: def y(self): print 'y worked!' it's more satisfying :) Basically, look into the difference between a class, and the INSTANCE of a class. Cheers, J.F. Ivan Shevanski wrote: > To continue with my previous problems, now I'm trying out classes. But > I have a problem (which I bet is easily solveable) that I really don't > get. The numerous tutorials I've looked at just confsed me.For intance: > >>>> class Xyz: > > ... def y(self): > ... q = 2 > ... > >>>> Xyz.y() > > Traceback (most recent call last): > File "<stdin>", line 1, in ? > TypeError: unbound method y() must be called with Xyz instance as first > argument > (got nothing instead) > > > So. . .What do I have to do? I know this is an extremley noob question > but I think maybe if a person explained it to me I would finally get it =/ > > > thanks in advance, > > -Ivan > > _________________________________________________________________ > Express yourself instantly with MSN Messenger! Download today - it's > FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/ >

1 0

Re: Zope3 Examples?
by Markus Wankus Oct. 1, 2005

Oct. 1, 2005

Gerhard Häring wrote: > Markus Wankus wrote: >> [...] Thanks for the reply - maybe I'll give it another shot. I'm >> currently demoing Snakelets. Quite a turn in the opposite direction, >> but small and super-easy to get going with. [...] > > I also found Snakelets a pleasure to use and chose it for implementing a > clan homepage in early 2005. > > I'm still very interested in the Python/Web/RDBMS field and tried to > follow the developments since then. I didn't actually build anything > real, only played a little bit with CherryPy and the megaframeworks > built upon, Subway and TurboGears. > > If I had to choose again, I'd use TurboGears, despite the fact that it's > very young and still developing. > > -- Gerhard > Good to know. I have watched the screencast for Turbogears but haven't tried it yet. There seemed to be a lot of "magic" methods going on there, and you could tell the guy doing the screencast had done that more than once. ;o) I guess once you run through the manual it would all make sense. I figure I'll give Snakelets a good go first. Is your Snakelets-based page up and accessible somewhere? Markus.

2 1

Re: Nufox : Xul + Python
by bearophileHUGS＠lycos.com Oct. 1, 2005

Oct. 1, 2005

Nufox seems a really interesting thing (probably it can even be used to design GUIs for local desktop apps), but the site seems down at the moment. Bye, bearophile

1 0

Printing and prompting adds a mysterious extra space
by Christoph Haas Oct. 1, 2005

Oct. 1, 2005

Evening... I'm writing a simple interactive program to maintain a database. The goal was to print "> " at the beginning of the line, wait for user input and then deal with it. Minimal test program: import sys; print ">", ; print sys.stdin.readline() However when I run the program and enter "foobar" it looks like this: ./test.py >foobar foobar ^----------- where does this space come from? I wonder where the space comes from in the line where I print what the user typed. Does it have to do with the "," after the print which I use to suppress the newline? Any ideas? Regards Christoph -- I'm still confused - just on a higher level now. ~ ~ ".signature" [Modified] 1 line --100%-- 1,48 All

1 0

Re: Help with syntax warnings
by Peter Otten Oct. 1, 2005

Oct. 1, 2005

Ivan Shevanski wrote: > Well I've been experimenting with the warning filter and it doesn't seem > to be working. . .I think it has something to do with the fact that > warnings are issued during the compiling and not during the excecution. . > .So the filter would come in to late to block them? Any ideas? $ cat syntaxwarning.py def f(): x = 42 global x $ python2.4 syntaxwarning.py syntaxwarning.py:1: SyntaxWarning: name 'x' is assigned to before global declaration def f(): Method 1: precompile the py-file and then invoke the compiled variant: $ python2.4 -c 'import syntaxwarning' syntaxwarning.py:1: SyntaxWarning: name 'x' is assigned to before global declaration def f(): $ python2.4 syntaxwarning.pyc Method 2: switch off the warning: $ python2.4 -Wignore::SyntaxWarning syntaxwarning.py Peter

1 0

Nufox : Xul + Python
by salvatore.didio＠wanadoo.fr Oct. 1, 2005

Oct. 1, 2005

Hello, You can test Nufox (with Firefox) at : http://artyprog.no-ip.org Regards

2 2

Re: Help with syntax warnings
by Peter Hansen Oct. 1, 2005

Oct. 1, 2005

Robert Kern wrote: > Peter Hansen wrote: >>Not sure... what's a "syntax warning"? > > In [1]: SyntaxWarning? > Type: classobj > String Form: exceptions.SyntaxWarning > Namespace: Python builtin > Docstring: > Base class for warnings about dubious syntax. Wow... Python detects "dubious syntax"? And here I thought programming was rather black and white, it's right or it's wrong. (He notes examples such as assigning to None and "unqualified exec is not allowed in function" etc.) I guess I've never accidentally hit one of those. Seems like, if I had, I'd probably want to fix the problem rather than hide it, as with most warnings from C compilers. -Peter

3 3

list.join()... re.join()...? Do they exist? (newbie questions...)
by googleboy Oct. 1, 2005

Oct. 1, 2005

Hi. In some google posts I searched suggested that there was a list.join() thing that I assume works like string.join [which I notice is now deprecated in favour of S.join()] It seems that I have been misled. I start with a text file that I split up to run some formatting over the various sections with re.split. I want to join it back together again with a | delimeter and write it out to a new file. I looked for a re.join, but it seems that doesn't exist. I looked for a list.join after reading the aforementioned posts, but it doesn't seem to exist either. To get it to work I did this: List[0] = list0 List[1] = list1 List[2] = list2 List[3] = list3 cat_list = list0 + '|' + flatblurb + '|' + flatcontents + '|' + flates + '\n' file.write(concat_list) But it seems to me that there is probably something more pythonic than having to go about it in such a laborious fashion.... Would someone be so kind as to fill me in? TIA! googleboy

2 1

Re: PEP 308 accepted - new conditional expressions
by Michele Simionato Oct. 1, 2005

Oct. 1, 2005

Terry Reedy ha scritto: > "Dave Benjamin" <ramen(a)lackingtalent.com> > > > Hooray! After years of arguing over which syntax to use, and finally > > giving up since nobody could agree, > > I understand that this has become the local 'politically correct' view, but > as a participant in the discussion, I know it not true and actively > deceptive. The community was prevented from coming to a decision. There > was a 'primary' vote with an incumbent, 15 challengers, and several > write-ins. But there was no runoff. <snip history of PEP 308> FWIW, I think Terry's recollection is pretty close to the "historical truth". Guido could have decided two years ago, sparing us the PEP 308 ordalia. So, I am happy that at the end we will have a conditional operator, but I am not happy of how the process worked out. It was just an enormous waste of resources that could have been employed much better :-( Michele Simionato

2 1

Re: Google Not Universal Panacea [was: Re: Where to find python c-sources]
by Erik Max Francis Oct. 1, 2005

Oct. 1, 2005

Steve Holden wrote: > I don't think "The source tarball on python.org" could claim to be > telling him "exactly where it was" given that my copy of the web site > has 341 MB of stuff in it. He doesn't have to search through the whole thing, there's a link on the front page, so this 341 MB figure is meaningless. I certainly understand laziness. I don't approve of it, but I can understand it. But I really don't understand _defending_ laziness. His grasp of the English language was just fine. He could have gotten the answer to his question by using Google with less time and effort than it took him to post to Usenet, wait for a response, and then act on it. Even if he were totally lazy and selfish, he could have gotten the answer more easily by using Google for ten seconds. Language was obviously not a barrier here, since the very words he used in asking the question could have been typed into a search engine to get exactly the answer he wanted. There are plenty of questions that are complex enough, or require knowing the right terminology which might not be obvious to an interested amateur, such that a search engine won't be the most practical way to do research. This was _certainly_ not one of those cases. -- Erik Max Francis && max(a)alcyone.com && http://www.alcyone.com/max/ San Jose, CA, USA && 37 20 N 121 53 W && AIM erikmaxfrancis No mistaking / Just reflecting what you radiate -- Anggun

1 0