Behavior on non definded name in Cheetah
[I hope I am posting to the right place] I have a cheetah template something like this: x is: $x y is: $y z is: $z [Actually more complicated] If for example $y is not defined I get an exception and the parsing of the template stops. Is there any way to substitute $y with an emty string and making cheeta going on with parsing? Thnx PAolo -- if you have a minute to spend please visit my photogrphy site: http://mypic.co.nr -- http://mail.python.org/mailman/listinfo/python-list
Re: Behavior on non definded name in Cheetah
2006/8/2, Stephan Diehl <[EMAIL PROTECTED]>:
> Paolo Pantaleo wrote:
> > [I hope I am posting to the right place]
> >
> > I have a cheetah template something like this:
> >
> > x is: $x
> > y is: $y
> > z is: $z
> >
> > [Actually more complicated]
> >
> > If for example $y is not defined I get an exception and the parsing
> > of the template stops. Is there any way to substitute $y with an emty
> > string and making cheeta going on with parsing?
> >
> > Thnx
> > PAolo
> >
>
> http://cheetahtemplate.org/docs/users_guide_html_multipage/language.namemapper.missing.html
> --
> http://mail.python.org/mailman/listinfo/python-list
>
Actually I wanted to keep things simple for who writes the template,
so I am using this workaround: I define a class
class ClassMapper:
def __init__(self,dict={}):
self.__dict=dict
def getValue(self,str):
try:
return self.__dict[str]
except KeyError:
return ""
x=ClassMapper(dict)
Template(definition, searchList=[{"info":x.getValue}])
so the user should do
$info("name")
Maybe I could define a class that implements a dictionary and doesn''t
raise an exception for a key not present... but it seems to
complicated.
PAolo
--
if you have a minute to spend please visit my photogrphy site:
http://mypic.co.nr
--
http://mail.python.org/mailman/listinfo/python-list
Re: Behavior on non definded name in Cheetah
2006/8/2, Peter Otten <[EMAIL PROTECTED]>:
> Paolo Pantaleo wrote:
>
> > 2006/8/2, Stephan Diehl <[EMAIL PROTECTED]>:
> >> Paolo Pantaleo wrote:
> >> > [I hope I am posting to the right place]
> >> >
> >> > I have a cheetah template something like this:
> >> >
> >> > x is: $x
> >> > y is: $y
> >> > z is: $z
> >> >
> >> > [Actually more complicated]
> >> >
> >> > If for example $y is not defined I get an exception and the parsing
> >> > of the template stops. Is there any way to substitute $y with an emty
> >> > string and making cheeta going on with parsing?
> >> >
> >> > Thnx
> >> > PAolo
> >> >
> >>
> >>
> http://cheetahtemplate.org/docs/users_guide_html_multipage/language.namemapper.missing.html
> >> --
> >> http://mail.python.org/mailman/listinfo/python-list
> >>
> >
> > Actually I wanted to keep things simple for who writes the template,
> > so I am using this workaround: I define a class
> >
> > class ClassMapper:
> > def __init__(self,dict={}):
> > self.__dict=dict
> > def getValue(self,str):
> > try:
> > return self.__dict[str]
> > except KeyError:
> > return ""
> >
> > x=ClassMapper(dict)
> > Template(definition, searchList=[{"info":x.getValue}])
> >
> >
> >
> > so the user should do
> >
> > $info("name")
> >
> > Maybe I could define a class that implements a dictionary and doesn''t
> > raise an exception for a key not present... but it seems to
> > complicated.
>
> You mean something like
>
> from Cheetah.Template import Template
>
> class Dict(dict):
> def __getitem__(self, key):
> return self.get(key, "")
>
> template = """\
> x is $x
> y is $y
> z is $z
> """
> print Template(template, searchList=[Dict(x="x", y="y")])
>
> You can also make a debugging version:
>
> class Dict(dict):
> def __getitem__(self, key):
> return self.get(key, "#missing key: %r#" % key)
>
> Peter
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
Wonderful, thnx a lot. Well not so complicated if you know how to do :D
PAolo
--
http://mail.python.org/mailman/listinfo/python-list
Grammar parsing
Hi, How can I write a pareser for a certain gramamr? I found PyPy that does it, is thare any other tool? Maybe something built-in the python interpreter? Thnx PAolo -- if you have a minute to spend please visit my photogrphy site: http://mypic.co.nr -- http://mail.python.org/mailman/listinfo/python-list
Re: Grammar parsing
2006/8/3, Ben Finney <[EMAIL PROTECTED]>: > "Paolo Pantaleo" <[EMAIL PROTECTED]> writes: > > > How can I write a pareser for a certain gramamr? I found PyPy that > > does it, is thare any other tool? Maybe something built-in the > > python interpreter? > > The standard library gets you partway there, with 'shlex': > > http://docs.python.org/lib/module-shlex.html> > > The cheeseshop knows of 'pyparsing': > > http://cheeseshop.python.org/pypi/pyparsing/> > Thnx everybody for the help, I finished using pyparsing actually, that is very handy and nice to use. PAolo -- if you have a minute to spend please visit my photogrphy site: http://mypic.co.nr -- http://mail.python.org/mailman/listinfo/python-list
[Announce] p-gal: photo gallery generator with templating support
Hi, I'm writing a software in python to generate html photo gallery. It is called p-gal and is GPL licensed. It is written in python [With the invaluable help of this list :)] and it has a templating system based on Cheetah. Currently it works under Linux (and maybe other UNIX-like OSs) The main idea of p-gal is to provide a framework to allow image gallery generation, but letting the user as free as possible about the style of the gallery. P-gal features for now only one template (or theme), but adding new ones is very simple. I would anyone to take a look at my piece of code, and give me his feedback about what is good and what should be improved. Thnx PAolo Pantaleo -- http://mail.python.org/mailman/listinfo/python-list
Re: [Announce] p-gal: photo gallery generator with templating support
14 Aug 2006 08:31:06 -0700, Paul Rubin <"http://phr.cx"@nospam.invalid>: > "Paolo Pantaleo" <[EMAIL PROTECTED]> writes: > > I would anyone to take a look at my piece of code, and give me his > > feedback about what is good and what should be improved. > > url? > -- > http://mail.python.org/mailman/listinfo/python-list > Sorry... www.sf.net/projects/ppgal -- http://mail.python.org/mailman/listinfo/python-list
Re: p-gal: photo gallery generator with templating support
14 Aug 2006 10:16:37 -0700, ajaksu <[EMAIL PROTECTED]>: > Paolo Pantaleo wrote: > > www.sf.net/projects/ppgal > > Ciao Paolo! > > The homepage (http://paolopan.freehostia.com/p-gal/ ) looks weird in my > SeaMonkey 1.0.4, contents appear below GoogleAds instead of at the > right. Well... I designed the site for Firefox... anyway I used CSS float directives and no tables. I don't know if I made something wrong, or if it is a [not so unlikely] standard compliance problem. Well Firefox too has some problems with floats. I copied the layout from http://www.topolinux.org/ - can you see this properly? -- if you have a minute to spend please visit my photogrphy site: http://mypic.co.nr -- http://mail.python.org/mailman/listinfo/python-list
locals() and globals()
Hi this exaple: def lcl(): n=1 x=locals() x["n"]=100 print "n in lcl() is:" +str(n) #This will say Name error #x["new"]=1 #print new n=1 x=globals() x["n"]=100 print "gobal n is:" +str(n) x["new"]=1 print "new is:" +str(new) lcl() produces gobal n is:100 new is:1 n in lcl() is:1 shouldn't be n in lcl() 100 too? why accessing the names dictionary globals() and locals() gives different results? This example was made using Python 2.4.3 (#69, Mar 29 2006, 17:35:34) [MSC v.1310 32 bit (Intel)] on win32 PAolo -- http://mail.python.org/mailman/listinfo/python-list
Screen capture on Linux
Hi, I need to capture a screen snapshot in Linux. PIL has a module IageGrab, but in the free version it only works under Windows. Is there any package to capture the screen on Linux? Thnx PAolo -- http://mail.python.org/mailman/listinfo/python-list
Re: Screen capture on Linux
Thnx everybody for the help, actually I need somethin slightly different. I found about some external process that can capture the screen, but since I need to captyre the screen up to 4-5 times a second, I don't want to fork a new process every time, so I was looking for some library...[This method works good on Windows] If needed, I was thinking to write a C module too. I never did it before, but I am a not so bad C programmer... any suggestion? What code can I read and eventually reuse? Would the xwd be useful? Anyway doesn't it exist a Python binding for let's say X APIs ? [I know about nothing about X programing] 2006/10/22, Theerasak Photha <[EMAIL PROTECTED]>: > On 22 Oct 2006 09:06:53 -0700, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > > Paolo Pantaleo wrote: > > > Hi, > > > > > > I need to capture a screen snapshot in Linux. PIL has a module > > > IageGrab, but in the free version it only works under Windows. Is > > > there any package to capture the screen on Linux? > > > > xwd comes with the X server. man xwd > > > > Most useful is "xwd -root" or similar. You may want "sleep 5; xwd > > -root" to give you some time to set things up as needed, or map it to a > > window manager keybinding. > > The problem with that is that xwd format is a non-standard format, and > *uncompressed* on top of that. If he wants to distribute the image to > friends, or whatever, he'll have to convert it to something like png > anyway. If he's using Linux, he probably doesn't need to use xwd > anyway and might as well save himself the effort (and HD space) now. > > -- Theerasak > -- > http://mail.python.org/mailman/listinfo/python-list > -- http://mail.python.org/mailman/listinfo/python-list
A py2exe like tool for Linux
Hi, is thre something like py2exe for Linux? I don't need to build a standalone executable (most Linuxes have python instaled), but at least I need to provide all the needed libraries togheter with my source code, so users just need to download one file, and not several libraries. PAolo -- http://mail.python.org/mailman/listinfo/python-list
Building C extensions
Well I'm just courious: if I want to buid a C extension, I shoul use the same compiler that has been used to build python (right?). Since python has been built using Visual C, how can I build an extension if I don't have Visual Studio? PAolo -- http://mail.python.org/mailman/listinfo/python-list
Getting backtrace on an axception
So I have this code try: do something except: do something else In the except block I need to print detailed output about the error occured, and in particular I need to read the backtrace for the line that raised the exception [then modify and print it]. I know about the exception.extract_tb() and friends, but I can't figure out how they works. Can somebody exlpain me? Thnx PAolo -- if you have a minute to spend please visit my photogrphy site: http://mypic.co.nr -- http://mail.python.org/mailman/listinfo/python-list
Specifing arguments type for a function
I have a function def f(the_arg): ... and I want to state that the_arg must be only of a certain type (actually a list). Is there a way to do that? Thnx PAolo -- if you have a minute to spend please visit my photogrphy site: http://mypic.co.nr -- http://mail.python.org/mailman/listinfo/python-list
Re: python - regex handling
2006/7/4, bruce <[EMAIL PROTECTED]>: > hi... > > does python provide regex handling similar to perl. can't find anything in > the docs i've seen to indicate it does... > > -bruce > > -- > http://mail.python.org/mailman/listinfo/python-list > http://python.org/doc/2.4.1/lib/module-re.html Here is the documentation about re, I think that if you spend an hour or two reading it, you will know about everything you need. Paolo -- If you like Python as I do, you can find useful my little Python resource center http://ppp3.co.nr -- http://mail.python.org/mailman/listinfo/python-list
Python & chess
Well Python is not a good language for writing a chess engine (even if a chess engine exists: http://www.kolumbus.fi/jyrki.alakuijala/pychess.html), but it could be grat for chess interfaces, for drawing boards, and similar things. I foudn out a library for these things (http://www.alcyone.com/software/chess/). Does anyone konw about more chess related modules? Thnx PAolo -- http://mail.python.org/mailman/listinfo/python-list
Re: avoiding file corruption
27 Aug 2006 00:44:33 -0700, Amir Michail <[EMAIL PROTECTED]>: > Hi, > > Trying to open a file for writing that is already open for writing > should result in an exception. > > It's all too easy to accidentally open a shelve for writing twice and > this can lead to hard to track down database corruption errors. > > Amir > > -- > http://mail.python.org/mailman/listinfo/python-list > Even if it could be strange, the OS usually allow you to open a file twice, that's up to the programmer to ensure the consistency of the operations. PAolo -- if you have a minute to spend please visit my photogrphy site: http://mypic.co.nr -- http://mail.python.org/mailman/listinfo/python-list
Re: Python daemon process
2006/8/26, Thomas Dybdahl Ahle <[EMAIL PROTECTED]>: > Hi, I'm writing a program, using popen4(gnuchess), > The problem is, that gnuchess keeps running after program exit. > > I know about the atexit module, but in java, you could make a process a > daemon process, and it would only run as long as the real processes ran. I > think this is a better way to stop gnuchess, as you are 100% sure, that > it'll stop. > > Can you do this with popen? > > -- > Thomas > -- > http://mail.python.org/mailman/listinfo/python-list > You could send the quit (or close or wahtever) command to gnuchess when you want it to terminate. Supposing that gnuchess needs to do some stuff on exit, this is a better solution. PAolo -- if you have a minute to spend please visit my photogrphy site: http://mypic.co.nr -- http://mail.python.org/mailman/listinfo/python-list
Writing Video conference software for Windows
Hi, I need to write a software that allow to see the desktop and hear the microphone capture of a remote PC across a network. I need to do that for a unviresity assignement. The software must run on Windows. Since I like Python very much I am thinking to write that software in Python. Do you thinkit is a good choice? Are there libraries for audio compression (OGG or MP3 or maybe GSM or something like realaudio) and video compression (btw what can be some good libraries to transmit images of a desktop in a bandwidth-efficent way?). What about capture of audio and screen? (Probably i will need some Win32 system call, there are bindings in Python, aren't they?) If I needed to write some Python modules in C, would it be difficult? Can some language like C# or C++ may be better? Thnx PAolo -- if you have a minute to spend please visit my photogrphy site: http://mypic.co.nr -- http://mail.python.org/mailman/listinfo/python-list
Re: Writing Video conference software for Windows
19 Sep 2006 09:42:51 -0700, Jordan <[EMAIL PROTECTED]>: > If you're going to need win32 system access use the win32all python > extension (very, very good extension). Do you need single frame image > capture, or constant video stream? PIL can be used for the first, it > might also be usable for video, I'm not sure. Well I need something like 5-10 fps. An issue is the comression method: MPEG and friends aren't good (I think) for compressing stuff with sharp borders. Maybe I could use A sequence of PNG images, but it isn't a great solution. For sound, python comes > with some built in libraries, but you should also take a look at > pysonic http://www.cs.unc.edu/Research/assist/developer.shtml. For the > bandwidth efficiency issue, what type of connection are you using? The > socket module is quite capable of transmiting whatever data you have, > so unless you're thinking of implementing some mini bittorrent like > network in an attempt to save bandwidth I don't know what you can do > about that. There's an extension called IPqueue which might give you > somewhere to start for packet/bandwidth manipulation. Check out The > Vaults of Parnassus, which has a lot of stuff (including ogg/mp3 > converters last time a check).Big question, is this supposed to act > like a remote desktop, or just show what's happening? Start by > searching Google, it's very useful. Well the bandwidth issue is most of all related to video compression (see above). Well maybe 256 kbps would be nice. It should just show what's happening. PAolo -- http://mail.python.org/mailman/listinfo/python-list
Re: Writing Video conference software for Windows
Thnx everybody for the precious help :) Someone said about VNC... I'll take a look, but since it is an exercise I need to do it, I can't just say someone else arelady did that :) Everything seems quite useful. I forgot two specifications: 1. Screen should be split in small squares and only the changing squares must be transmitted (Ok it shouldn't be too difficult) 2. The comunication must be in multicast I will spend some time testing the resources. PAolo -- http://mail.python.org/mailman/listinfo/python-list
Re: Writing Video conference software for Windows
2006/9/22, Paolo Pantaleo <[EMAIL PROTECTED]>: > Thnx everybody for the precious help :) > > Someone said about VNC... I'll take a look, but since it is an > exercise I need to do it, I can't just say someone else arelady did > that :) > > Everything seems quite useful. I forgot two specifications: > > 1. Screen should be split in small squares and only the changing > squares must be transmitted (Ok it shouldn't be too difficult) > > 2. The comunication must be in multicast Twisted supports multicast ( example http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/425975) > > I will spend some time testing the resources. > > PAolo > -- if you have a minute to spend please visit my photogrphy site: http://mypic.co.nr -- http://mail.python.org/mailman/listinfo/python-list
VIdeo Converence Software: Tk and thread synchronization
Hi, I am going on writing my video conference software. I wrote the video grab, code/decode, and netwoark (multicast) transport. I have one thread doing this: [thread 1] while True: for some times: my_socket.recv() #blocking here store data compute image #here we have a complete new image to display Now, I was thinking to display the image in a Tk window. But I think i will need a separate thread to run the mainloop() [thread 2], right? How can I signale to the Tk thread that a new image is ready to be shown? I was thinkin on using an event generated for the first (network) thread. But I don't know how to do it exactly. Any suggestion, please? What if I access to Tk object form thread 1, is Tk thread safe? Thnx PAolo -- if you have a minute to spend please visit my photogrphy site: http://mypic.co.nr -- http://mail.python.org/mailman/listinfo/python-list
Tk: filling a frame with a widget
I have this code from Tkinter import * root=Tk() Button(root).pack(fill=BOTH) root.mainloop() I would expect the button filling all the client draw area of the Frame, but when I resize the root window the button becomes wider, but not higher ( I get some empty space under the button). How could set the button to fill always all the space available? Well maybe some other solution exists, since my problem is this: I have a resizable window and i want to keep it filled with a Canvas displaying an image (PhotoImage). Can I get the in some way the size of the clien draw area of the window containig the canvas? Thnx PAolo -- if you have a minute to spend please visit my photogrphy site: http://mypic.co.nr -- http://mail.python.org/mailman/listinfo/python-list
Wrong exist status for os.system, os.poepen, etc.
Subject: python2.4: Wrong exist status for os.system, os.poepen, etc.
Package: python2.4
Version: 2.4.4-2
Severity: normal
-- System Information:
Debian Release: 4.0
APT prefers testing
APT policy: (800, 'testing'), (70, 'stable'), (60, 'unstable')
Architecture: i386 (i686)
Shell: /bin/sh linked to /bin/bash
Kernel: Linux 2.6.18-3-k7
Locale: LANG=it_IT.UTF-8, LC_CTYPE=it_IT.UTF-8 (charmap=UTF-8)
I send this to python-list also, so someone can tell if he/she can
(not) reproduce
the same behavior
The os.system() (but all the other funciont with similar behavior) reports
wrong exit status. I can reproduce the bug in the following way
create /tmp/x.c:
#include
int main(void){
exit(20);
}
$ cd /tmp
$ make x
$./x
$echo $?
20
$ python
give the following commands:
>>> import os
>>> os.system("/tmp/x")
5120
the same for
>>> x=os.popen("/tmp/x")
>>> x.read()
''
>>> x.close()
5120
Greetings
PAolo
Versions of packages python2.4 depends on:
ii libbz2-1.0 1.0.3-6 high-quality block-sorting file co
ii libc6 2.3.6.ds1-10 GNU C Library: Shared libraries
ii libdb4.44.4.20-8 Berkeley v4.4 Database Libraries [
ii libncursesw55.5-5Shared libraries for terminal hand
ii libreadline55.2-2GNU readline and history libraries
ii libssl0.9.8 0.9.8c-4 SSL shared libraries
ii mime-support3.39-1 MIME files 'mime.types' & 'mailcap
ii python2.4-minimal 2.4.4-2 A minimal subset of the Python lan
python2.4 recommends no packages.
-- no debconf information
--
http://mail.python.org/mailman/listinfo/python-list
Re: list example
2006/4/22, Edward Elliott <[EMAIL PROTECTED]>: > No substantive problems. The str() calls are unnecessary, print calls > list.__str__ already. You can replace the loop with list comprehensions or > slices. Same result, a bit more succinct. See these pages for more: > > http://docs.python.org/lib/typesseq.html > http://docs.python.org/tut/node7.html (section 5.1.4) > > Thnx, I didn't catch the use of colon in print... Thanks to the other posting, but actually I want to write some code that one can modify to his own needings PAolo -- http://mail.python.org/mailman/listinfo/python-list
test assignmet problem
So I tried this if(not (attr=global_re.match(line)) ): break it says invalid syntax [on the =] so it is not possible to do test and assignment in C style? how can I write this otherwise? Thnx PAolo -- if you have a minute to spend please visit my photogrphy site: http://mypic.co.nr -- http://mail.python.org/mailman/listinfo/python-list
Re: test assignmet problem
2006/4/23, Paul McGuire <[EMAIL PROTECTED]>: > > "Paolo Pantaleo" <[EMAIL PROTECTED]> wrote in message > news:[EMAIL PROTECTED] > So I tried this > > if(not (attr=global_re.match(line)) ): > break > > it says invalid syntax [on the =] > ... because this syntax is not valid ... > > so it is not possible to do test and assignment in C style? > ... no it's not, see > http://www.python.org/doc/faq/general/#why-can-t-i-use-an-assignment-in-an-expression > > how can I write this otherwise? > ... is this so bad?... > > attr=global_re.match(line) > if not attr: > break > > ... or, since you don't seem to be doing much with attr, you could just do > > if not global_re.match(line): > break > > ... and get rid of all those distracting ()'s! > > > -- > http://mail.python.org/mailman/listinfo/python-list > Thnx for the help, actually the problme is not solved i have [well I want to do...] something like: if a=b(): do stuff with a else if a=c(): do stuff with b else: do other stuff well, two solutions are a1=b() a2=c() if a1: do stuff with a1 else if a2: do stuff with a2 else: do other stuff the other is if b(): a=b() do stuff with a else if c(): a=c() do stuff with b else: do other stuff Even if none is exactly the same about: * the number of times the b() and c() functions are executed * the final value of a I think the right one is: a=b() if a: do stuff with a else: a=c() if a=c(): do stuff with b else: do other stuff PAolo -- if you have a minute to spend please visit my photogrphy site: http://mypic.co.nr -- http://mail.python.org/mailman/listinfo/python-list
Includeing Python in text files
I am working on this: I have a text file, containig certain section in the form I parse the text file and substitute the python code with its result [redirecting sys.stdin to a StringIO]. It something like php or embedded perl. So my little toy works not bad, but I was wondering if such a feature already existed, if yes, can you point me out some links? Thnx PAolo -- if you have a minute to spend please visit my photogrphy site: http://mypic.co.nr -- http://mail.python.org/mailman/listinfo/python-list
Re: Includeing Python in text files
2006/5/23, Chris Smith <[EMAIL PROTECTED]>: > Diez B. Roggisch wrote: > > Paolo Pantaleo wrote: > > > > > >>I am working on this: > >> > >>I have a text file, containig certain section in the form > >> >> python code here > >>py?> > >> > >>I parse the text file and substitute the python code with its result > >>[redirecting sys.stdin to a StringIO]. It something like php or > >>embedded perl. > >> > >>So my little toy works not bad, but I was wondering if such a feature > >>already existed, if yes, can you point me out some links? > > > > > > Its a templating system, and there are a gazillion out there. Some of them > > are listed here: > > > > http://www.cherrypy.org/wiki/ChoosingATemplatingLanguage > > > > > > Diez > > > > > > > I'm just getting into programming so this may be a dumb question...but > why would you want to do this? What is templating good for? > > Chris > > -- > http://mail.python.org/mailman/listinfo/python-list > Well php is base on this principle, most (server side) dynamic sites are based on some template sistem PAolo -- if you have a minute to spend please visit my photogrphy site: http://mypic.co.nr -- http://mail.python.org/mailman/listinfo/python-list
Request for comment: programmer starting page (micro knowledge base)
I am writting down a pege with useful links for a Python programmer. That is reference, tutorials and anything that can be useful. I use it regulary when programming in Python and I can't do without it. I would be happy if you go and see that page, and tell me what you think about and suggest links to be added. The page is : http://ppp3.co.nr Thnx Paolo Pantaleo -- http://mail.python.org/mailman/listinfo/python-list
