DFW Pythoneers Meeting THIS Saturday
This Saturday we'll be holding our 4th Saturday meeting of the DFW Pythoneers, at the usual location of Nerdbooks.com bookstore in Richardson. For directions, visit the Nerdbooks.com website. We start at 2pm and run until 5pm, and then go out for a group dinner. At this meeting one of our local members, Jeremy Dunck, will be giving us a preview of a 60-minute advanced Django tutorial he is helping to give at OSCON next month. The advanced material will cover the unicode branch, signals and either stateful views or gis branch. Since many of our members are not experienced with Django, Jeremy will present a 45-minute introduction to Django first, which will cover URLConf, views, models and perhaps middleware. --- By the way, I've been contacted by a developer at the Travelocity Dallas office, who is looking for local Python developers with experience in Django or Genshi. If you're interested, let me know and I can put you in touch. --- And just to give a heads-up for July, our own Patrick R. Michaud has agreed to give our group a presentation on the status of support for Python in the virtual machine, Parrot, underlying Perl 6 and many other languages. For more info, check out: http://www.parrotcode.org Patrick will present to us on the 2nd Saturday of July, the 14th. Patrick is the author of PGE, the parrot/Perl6 Grammar engine and is also the Perl 6 compiler pumpking. See you there! Jeff Rush DFW Pythoneers Organizer -- http://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations.html
Python-URL! - weekly Python news and links (Jun 19)
QOTW: Regarding a Java programmer moving to Python, a lot of the mindset change is about the abundant use of built in data types of Python. So a Java programmer, when confronted with a problem, should think 'how can I solve this using lists, dicts and tuples?' (and perhaps also my new favourite, sets). Class-based solution should be chosen only after seeing that the problem can't be trivially solved with built-in types. - Ville Vainio The remainder of the unittest docs are somewhat obtuse and uninspiring. - Raymond Hettinger How to generate HTML page thumbnails: John J Lee enumerates several alternatives, using MSIE, Firefox, Konqueror and others. http://groups.google.com/group/comp.lang.python/browse_thread/thread/2185ad4e31c9320b/ Concatenating strings may be painfully slow in some circumstances if not done the right way: http://groups.google.com/group/comp.lang.python/browse_thread/thread/3999b83838787fa1/ Initializing class members only when needed, using a LazyClassAttribute decorator: http://groups.google.com/group/comp.lang.python/browse_thread/thread/18f8b54cb15f922f/ Postpone attribute creation: similar to thread above, but more from a design perspective: http://groups.google.com/group/comp.lang.python/browse_thread/thread/393d2ac620716d90/ Simple Programs: the search for small, complete, useful examples of Python code still continues: http://groups.google.com/group/comp.lang.python/browse_thread/thread/ec8184ca4ed7e3e6/ See the resulting programs at http://wiki.python.org/moin/SimplePrograms A simple question: How many list items comply with this condition?, and many answers: http://groups.google.com/group/comp.lang.python/browse_thread/thread/6d488fb624fbb6a7/ Continuing from last week: only one way to do it, now discussing tail call optimization, generic programming, Scheme and macros... http://groups.google.com/group/comp.lang.python/browse_thread/thread/e587471d08dbfcbb/ Everything Python-related you want is probably one or two clicks away in these pages: Python.org's Python Language Website is the traditional center of Pythonia http://www.python.org Notice especially the master FAQ http://www.python.org/doc/FAQ.html PythonWare complements the digest you're reading with the marvelous daily python url http://www.pythonware.com/daily Mygale is a news-gathering webcrawler that specializes in (new) World-Wide Web articles related to Python. http://www.awaretek.com/nowak/mygale.html While cosmetically similar, Mygale and the Daily Python-URL are utterly different in their technologies and generally in their results. The Python Papers aims to publish the efforts of Python enthusiats. http://pythonpapers.org/ Readers have recommended the Planet sites: http://planetpython.org http://planet.python.org comp.lang.python.announce announces new Python software. Be sure to scan this newsgroup weekly. http://groups.google.com/groups?oi=djqas_ugroup=comp.lang.python.announce Python411 indexes podcasts ... to help people learn Python ... Updates appear more-than-weekly: http://www.awaretek.com/python/index.html Steve Bethard continues the marvelous tradition early borne by Andrew Kuchling, Michael Hudson, Brett Cannon, Tony Meyer, and Tim Lesher of intelligently summarizing action on the python-dev mailing list once every other week. http://www.python.org/dev/summary/ The Python Package Index catalogues packages. http://www.python.org/pypi/ The somewhat older Vaults of Parnassus ambitiously collects references to all sorts of Python resources. http://www.vex.net/~x/parnassus/ Much of Python's real work takes place on Special-Interest Group mailing lists http://www.python.org/sigs/ Python Success Stories--from air-traffic control to on-line match-making--can inspire you or decision-makers to whom you're subject with a vision of what the language makes practical. http://www.pythonology.com/success The Python Software Foundation (PSF) has replaced the Python Consortium as an independent nexus of activity. It has official responsibility for Python's development and maintenance. http://www.python.org/psf/ Among the ways you can support PSF is with a donation. http://www.python.org/psf/donate.html Kurt B. Kaiser publishes a weekly report on faults and patches. http://www.google.com/groups?as_usubject=weekly%20python%20patch Although unmaintained since 2002, the Cetus collection of Python hyperlinks retains a few gems. http://www.cetus-links.org/oo_python.html Python
Re: The Modernization of Emacs
On Jun 19, 9:21 pm, Ed [EMAIL PROTECTED] wrote: Have you ever seen an, Extractmethod, function for emacs? Whereby you highlight some lines of code, press a key, and the code is whisked into its ownmethod, with the appropriatemethodinvocation left in its place. If you could post a link, that'd be just champion. xrefactory does this. I tried it once. It's a bit pricey , though. -- http://mail.python.org/mailman/listinfo/python-list
Re: Q: listsort and dictsort - official equivalents?
On Wed, 20 Jun 2007 02:57:30 +0200, BJörn Lindqvist wrote: It's not true that the sort must complete (or that the whole file must be read for that matter) That would be a really good trick. How are you supposed to know which item comes first until you've seen them all? -- Steven. -- http://mail.python.org/mailman/listinfo/python-list
Re: Python's only one way to do it philosophy isn't good?
Douglas Alan wrote: I think that most people who program in Scheme these days don't do it to write practical software. They either do it to have fun, or for academic purposes. On the other hand, most people who program in Python are trying to get real work done. Which is precisely why I program a lot in Python and very little in Scheme these days. It's nice to have the batteries included. |oug A few years ago, tired by the endless threads on comp.lang.python asking from the inclusion of macros in Python, I decided to learn Scheme and to understand what the fuss was about. Learning Scheme coming from Python was not difficult for what concerned the language features properly, but it was extremely difficult for what concerned the philosophy behind the language. I remember that I was expecially angry when I discovered that the famous Sussman's quotation Programming languages should be designed not by piling feature on top of feature, but by removing the weaknesses and restrictions that make additional features appear necessary was just a bunch of nice words. In practice Scheme follows exactly the opposite route: there are dozens of different and redundant object systems, module systems, even record systems, built just by piling up feature over feature. So the minimalism of the core language is just a lie or at best a red herring (the core language can be minimalistic, but the core language is basically useless for any real life job). I was angry for months, until I finally understood that I had to look at the language in a different way. I thought Scheme was a language to build applications, but I was wrong: Scheme is a language intended for language design experimentations. So if you have an idea for a new and cool object system, Scheme would be a good tool for prototyping/implementing it without going at the Assembler or C level. OTOH, if you have an idea for a new Web framework, Python would be a much better tool to implement it (but please, don't publish it! ;) So I basically view Scheme as a tool for language designers only, or with people with interest in language design and I don't use it for anything else. I see Python or C as much better practical implementations of Sussman's quote about minimalism than real Scheme (for an example of real Scheme, I refer for instance to the PLT implementation). Michele Simionato -- http://mail.python.org/mailman/listinfo/python-list
Re: Python's only one way to do it philosophy isn't good?
Michele Simionato [EMAIL PROTECTED] writes: I see Python or C as much better practical implementations of Sussman's quote about minimalism than real Scheme (for an example of real Scheme, I refer for instance to the PLT implementation). Python and C as programming languages are like democracy as a system of government--absolutely terrible, but everything else seems to be even worse. The real answer (to programming languages, not governments) seems tantalizingly close, but not here yet. -- http://mail.python.org/mailman/listinfo/python-list
Re: HTMLParser.HTMLParseError: EOF in middle of construct
Sérgio Monteiro Basto wrote:
Stefan Behnel wrote:
Sérgio Monteiro Basto wrote:
but is one single error that blocks this.
Finally I found it , it is :
td colspan=2align=center
if I put :
td colspan=2 align=center
p = re.compile('align')
content = p.sub(' align', content)
I can parse the html
I don't know if it a bug of HTMLParser
Sure, and next time your key doesn't open your neighbours house, please
report to the building company to have them fix the door.
The question, here, is if
td colspan=2align=center
is valid HTML or not ?
I think is valid , if so it's a bug on HTMLParser
According to the HTML 4.01 specification this is *not valid* HTML.
Elements may have associated properties, called attributes, which may
have values
(by default, or set by authors or scripts). Attribute/value pairs
appear before the final
of an element's start tag. Any number of (legal) attribute value
pairs, separated
by spaces, may appear in an element's start tag.
if not, we still have a very bad message error (EOF in middle of
construct !?)
HTMLParser can deal with some errors e.g. lack of ending tags,
but it can't handle many other problems.
I have to use HTMLParser because I want use only python 2.4 standard , I
have to install the scripts in many machines.
And I have to parse many different sites, I just want extract the links, so
with a clean up before parse solve very quickly my problem.
In Python 2.4 you have to use some third party module. There is no
other option for _invalid_ HTML. IMHO BeautifulSoup is the best among
them.
--
HTH,
Rob
--
http://mail.python.org/mailman/listinfo/python-list
Re: caseless dictionary howto ?
Gabriel Genellina wrote: En Tue, 19 Jun 2007 19:40:10 -0300, Steven Bethard [EMAIL PROTECTED] escribió: Stef Mientki wrote: Evan Klitzke wrote: On 6/19/07, Stef Mientki [EMAIL PROTECTED] wrote: I need to search a piece of text and make all words that are equal (except their case) also equal in their case, based on the first occurrence. ... def __setitem__(self, key, value): ... self._dict[key.lower()] = value ... if key not in self._original_keys: ... self._original_keys[key.lower()] = key ... Note that because I store the first form encountered for every key, I can always use the lower-case version to retrieve the original string. As written, it stores the last used spelling; a small change is required to get the intended behavior: ... def __setitem__(self, key, value): ... self._dict[key.lower()] = value ... if key.lower() not in self._original_keys: ... self._original_keys[key.lower()] = key Good catch. Thanks! Steve -- http://mail.python.org/mailman/listinfo/python-list
Re: Windows XMLRPC Service
On Jun 19, 12:32 pm, Gabriel Genellina [EMAIL PROTECTED] wrote: En Tue, 19 Jun 2007 14:57:10 -0300, [EMAIL PROTECTED] escribió: #win32event.WAIT_TIMEOUT = 2 --- This just makes the loop never execute because # the WaitFor... part always returns 258 WAIT_TIMEOUT is 258. How do you see it is 2? py import win32event py win32event.WAIT_TIMEOUT 258 I meant here that *if* I set the WAIT_TIMEOUT to 2, then I see that behavior. Ah, ok! I should have stated clearly that WAIT_TIMEOUT is a Windows predefined constant, not your desired timeout value. Thank you again Gabriel. I'll post back with something complete. Yes, please, a working example would be nice for future readers... -- Gabriel Genellina For posterity... import sys import win32serviceutil import win32service import win32event import win32evtlogutil import servicemanager import SocketServer, socket from SimpleXMLRPCServer import SimpleXMLRPCServer,SimpleXMLRPCRequestHandler # Threaded mix-in class AsyncXMLRPCServer(SocketServer.ThreadingMixIn,SimpleXMLRPCServer): pass import XMLRPC_funcs # module containing the functions wrapped in a class class XMLRPCservice(win32serviceutil.ServiceFramework): _svc_name_ = PythonXMLRPC _svc_display_name_ = PythonXMLRPC _svc_description_ = Multi-threaded Python XMLRPC Server def __init__(self, args): # set the timeout so the service can stop...Otherwise it hangs forever socket.setdefaulttimeout(15) win32evtlogutil.AddSourceToRegistry(self._svc_display_name_, sys.executable, Application) win32serviceutil.ServiceFramework.__init__(self, args) # Create an event which we will use to wait on. self.hWaitStop = win32event.CreateEvent(None, 0, 0, None) localhost = socket.gethostbyname(socket.gethostname()) self.server = AsyncXMLRPCServer((localhost, 8000), SimpleXMLRPCRequestHandler) def SvcStop(self): self.ReportServiceStatus(win32service.SERVICE_STOP_PENDING) #send the stop event win32event.SetEvent(self.hWaitStop) def SvcDoRun(self): # log a start msg servicemanager.LogMsg(servicemanager.EVENTLOG_INFORMATION_TYPE, servicemanager.PYS_SERVICE_STARTED, (self._svc_name_, ' (%s)' % self._svc_name_)) self.server.register_instance(XMLRPC_funcs.XMLRPC_funcs()) # handle requests until the stop event is received while win32event.WaitForSingleObject(self.hWaitStop, 0) == win32event.WAIT_TIMEOUT: self.server.handle_request() # log a stopped msg win32evtlogutil.ReportEvent(self._svc_name_, servicemanager.PYS_SERVICE_STOPPED, 0, servicemanager.EVENTLOG_INFORMATION_TYPE, (self._svc_name_,)) if __name__ == '__main__': win32serviceutil.HandleCommandLine(XMLRPCservice) -- http://mail.python.org/mailman/listinfo/python-list
Re: caseless dictionary howto ?
Gabriel Genellina wrote: En Tue, 19 Jun 2007 19:40:10 -0300, Steven Bethard [EMAIL PROTECTED] escribió: Stef Mientki wrote: Evan Klitzke wrote: On 6/19/07, Stef Mientki [EMAIL PROTECTED] wrote: I need to search a piece of text and make all words that are equal (except their case) also equal in their case, based on the first occurrence. ... def __setitem__(self, key, value): ... self._dict[key.lower()] = value ... if key not in self._original_keys: ... self._original_keys[key.lower()] = key ... Note that because I store the first form encountered for every key, I can always use the lower-case version to retrieve the original string. As written, it stores the last used spelling; a small change is required to get the intended behavior: ... def __setitem__(self, key, value): ... self._dict[key.lower()] = value ... if key.lower() not in self._original_keys: ... self._original_keys[key.lower()] = key --Gabriel Genellina thanks guys, I'll think a while which solution I'll choose. cheers, Stef Mientki -- http://mail.python.org/mailman/listinfo/python-list
Re: Execute script on remote computer
Evan Klitzke a écrit : On 6/19/07, Vikas Saini [EMAIL PROTECTED] wrote: I am trying to run the agent on one machine that will execute the script of a remote machine. It's not clear what OS you're using. But if you're running a Unix/Linux system and it's a relatively simple script that you want to run, you should just use the ssh command coupled with the name of the command you want to run (you don't even need the agent to use python, necessarily). For example, ssh [EMAIL PROTECTED] bar Will ssh to machine 'foo' as user 'user' and execute command 'bar' on that machine (rather than launching a shell, which is what ssh will do if no command is specified). When the command exits, ssh will exit as well. Note: You can use an ssh server on Windows too, see CopSSH for a free, relatively easy to install solution. So unix solution for running Python script can be used uder Xindows Xp too - at least if you dont want to have a GUI [*]. See http://www.itefix.no/phpws/index.php?module=pagemasterPAGE_user_op=view_pagePAGE_id=12 [*] You can do remote display of Windows screen via an encrypted VNC using ssh port redirection - if you read french (or like screen capture), see http://www.limsi.fr/Individu/pointal/winremote/ -- http://mail.python.org/mailman/listinfo/python-list
Re: static python classes ?
Tom Gur a écrit : Look for @staticmethod inhttp://docs.python.org/lib/built-in-funcs.html Example: class C: @staticmethod def f(arg1, arg2, ...): ... Oops, sorry for the confusion - I've actually meant a static method, and Gerald's answer works fine. FWIW, staticmethods in Python are of very restricted use - we have modules and functions for this. And you may be interested in classmethods (methods that takes the class object instead of the instance as first argument). As a last word : trying to write Java in Python wis certainly not the best option. Better to learn to write Python. http://dirtsimple.org/2004/12/python-is-not-java.html -- http://mail.python.org/mailman/listinfo/python-list
Re: DFW Pythoneers Meeting THIS Saturday
Just a tad arrogant, don't you think, to put a notice of some local event on an international forum without saying where it is? -- http://mail.python.org/mailman/listinfo/python-list
Re: Help With Better Design
--- [EMAIL PROTECTED] wrote: ON = ON OFF = OFF class LightBulb: def __init__(self, initial_state): self.state = initial_state def TurnOn(self): if self.state == OFF: self.state = ON else: print The Bulb Is Already ON! def TurnOff(self): if self.state == ON: self.state = OFF else: print The Bulb Is Aleady OFF! I've written code that looks a lot like that, and it's a perfectly acceptable pattern IMHO. I don't bother with the variables ON and OFF, though, as they add no clarity to simply using 'ON' and 'OFF' for the states. [...] The test portion of the code is actually longer than the class itself :-) That's usually a good thing! It means your code is concise, and your tests are exhaustive. (But that doesn't mean you can't also refactor your tests.) Be a better Globetrotter. Get better travel answers from someone who knows. Yahoo! Answers - Check it out. http://answers.yahoo.com/dir/?link=listsid=396545469 -- http://mail.python.org/mailman/listinfo/python-list
Re: Python and (n)curses
For me, introducing similar commands in Python would be by far the biggest single improvement that could be made to the language. If it should be done, it should be done as a compatible subset of curses, IMHO. It has such a long history as the standard GUI toolkit But curses doesn't run under Windows - thats the whole point! -- http://mail.python.org/mailman/listinfo/python-list
Re: Python IDE
On 6/19/07, Evan Klitzke [EMAIL PROTECTED] wrote: On 6/19/07, Bjoern Schliessmann [EMAIL PROTECTED] wrote: BartlebyScrivener wrote: VIM *clap-clap* BTW, are there tutorials on the more arcane vim functions that come in handy with Python? I don't know of any vim functions that are python specific, but to me the two somewhat arcane things that are really important to using vim efficiently in programming in general are window splitting and folding. Folding can be immensely useful for moving through files and keeping important information visible. Ctags is also useful -- it lets you jump to where the class/function under the cursor is defined. Window tabbing is also new as of vim 7, but I prefer window splits. You'll probably want to write some vim macros to help you use the window splits more efficiently (e.g. to to move up a split and maximize it in one key stroke). There's a script on vim.org for using the unittest module with the :make command, which is also useful if you use that module a lot. And of course if you build vim with python support, you can script vim using python! Another thing I've noticed is that there are a couple of different work flows that people have for testing code they're writing in vim. The simplest way to run a script is with :!python % (sans quotes), which runs the script with the output going to vim which pretends to be a terminal. I think this is sort of suboptimal because vim isn't a real terminal so some programs will act strangely this way. The workflow I have is a screen session with vim in one (or more) windows and another window that is just a shell, which I run my scripts in. Another method that I've seen is to just background vim with Ctrl-Z, run the program, and then foreground the vim session to go back to the code. Either way, I think running your session in screen is really, really useful because you can do a search through the screen buffer for occurrences of certain words (I tend to do a backwards search, with Ctrl-a [ ?search_term), which can help you search through the output of your program quickly when things go awry. IF you're a fan of screen (or want to use it), I have a pretty nifty .screenrc that I use that shows the screen windows on a status line at the bottom with some other nifty information (the hostname of the machine screen is running on, the load information, and the time) as well, plus support for 256 colors, which lets you use those nice 256 color vim colorschemes. If you're interested you can grab it at http://eklitzke.org/files/.screenrc Oh, one more that I forgot is Bicycle Repair Man. I haven't used it a lot, but it looks really interesting -- it's a tool designed to facilitate refactoring Python code. You can use it with vi or emacs. For those that are interested, you can read more about it at http://bicyclerepair.sourceforge.net/ -- Evan Klitzke [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
Re: Python and (n)curses
On 6/20/07, peter [EMAIL PROTECTED] wrote: For me, introducing similar commands in Python would be by far the biggest single improvement that could be made to the language. If it should be done, it should be done as a compatible subset of curses, IMHO. It has such a long history as the standard GUI toolkit But curses doesn't run under Windows - thats the whole point! I know of at least one curses implementation that runs on Windows -- PDCurses. You can find its home page at http://pdcurses.sourceforge.net/. I have the fortune not to have a need to do Windows curses programming ;-) so I'm not sure how good the Python support is, but a quick Google search showed a number of ad hoc Python wrappers for it. -- Evan Klitzke [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
Re: caseless dictionary howto ?
Stef Mientki wrote: I need to search a piece of text and make all words that are equal (except their case) also equal in their case, based on the first occurrence. So I'm using a dictionary to store names and attributes of objects. As as I need to search on the caseless name (so I've choosen lowercase), My dictionairy looks like this: self.procs [ serial_hw_read ] = ( Serial_HW_Read, F, ++, T) I have no idea what the F, ++, T means at the end (if it's some kind of flags or attributes, maybe a class to hold them would look better), but that's a good solution to the problem IMHO. Stefan -- http://mail.python.org/mailman/listinfo/python-list
Re: Using a switch-like if/else construct versus a dictionary?
asincero [EMAIL PROTECTED] wrote:
handle_case = {}
handle_case[1] = doCase1()
handle_case[2] = doCase2()
handle_case[3] = doCase3()
handle_case[4] = doCase4()
handle_case[5] = doCase5()
handle_case[c]()
If the switch values are simple integers then a list would be a more
obvious choice:
handle_case = [ doCase1, doCase2, doCase3, doCase4, doCase5 ]
handle_case[c-1]()
Note that in this situation using OO polymorphism instead of a switch-
like construct wouldn't be applicable, or at least I can't see how it
could be.
That is often the case when you reduce your question to a mickeymouse do
nothing example.
There are many ways to write code that could be written using a switch
statement. If you took a few real use-cases then you would probably each
one needs a different technique for best effect depending on the number
of different cases, the values which must be accessed within each case,
the side-effects (if any) expected from handling the case etc.
The obvious options include: if/elif chain; a list or dictionary
containing data values (not functions); a list or dict containing
functions; command pattern (i.e. a class with a dispatch method); a
class hierarchy and polymorphism; visitor pattern.
For an example of the last of these see
http://www.chris-lamb.co.uk/blog/2006/12/08/visitor-pattern-in-python/
which uses decorators to produce a very clean implementation using (I
think) PyProtocols dispatch.
--
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Re: static python classes ?
Bjoern Schliessmann wrote: Diez B. Roggisch wrote: With other OOP languages you mean Java. Which does have static methods because they lack the notion of a function by its own, so the shoehorned them into their everything is inside a class-paradigm. ACK, but doesn't C++ have static methods too? Might be, I'm a bit rusty on C++. But they do have normal functions as well - so I figured the OP wouldn't have troubles then. Diez -- http://mail.python.org/mailman/listinfo/python-list
Re: Python IDE
Hi,
With a python-enabled VIM it's possible to execute and thus test the
python code. I have the following lines in my vimrc.
F2 prints the result of a line evaluation on the bottom or in a window
named pyout if there. I open pyout with :vert rightb new pyout mapped to
F1.
F4 does the same on the selected part of a line
F3 evaluates without printing
py import vim
py EOL
def PyOutput():
iPy=-1
for i in range(len(vim.buffers)):
if vim.buffers[i].name and vim.buffers[i].name.find(pyout)!=-1:
iPy=i
return iPy
EOL
pyout if present must be right below
r replaces, p prints, symb sets the start
py EOL
def PrintCurrentLine(*args):
cur_str = vim.current.line
action, symb = None, None
for i in args:
if i in [r,p]: action = i
else: symb = i
try:start = cur_str.rindex(symb)+len(symb)
except: start = 0
eval(compile(pyoutres=+cur_str[start:],'string','exec'),globals())
result = eval(pyoutres,globals())
if action == r:
vim.current.line = cur_str[:start]+str(result)
else:
iPy=PyOutput()
if iPy != -1:
resS= +cur_str+:+'\n'+str(result)+'\n'
resL=resS.split('\n')
vim.buffers[iPy].range(0,0).append(resL)
vim.command(wincmd b)
vim.command(normal gg)
vim.command(wincmd p)
vim.command(wincmd j)
else:
print result
EOL
command -narg=* Pyl python PrintCurrentLine(f-args)
map F2 :py PrintCurrentLine()CR
this evaluates selected region with F2
map F4 tyo^[tpF2u
map F1 :vert rightb new pyout
python EOL
def EvaluateCurrentRange():
c_r=vim.current.range
i=0
while c_r[0].startswith(' '*(i+1)):
i+=1
rngstr='\n'.join([ln[i:] for ln in c_r])
eval(compile(rngstr,'string','exec'),globals())
EOL
map F3 :py EvaluateCurrentRange()CR
[EMAIL PROTECTED] schrieb
am 19.06.2007 17:20:08:
Bjoern Schliessmann wrote:
BartlebyScrivener wrote:
VIM
*clap-clap*
BTW, are there tutorials on the more arcane vim functions that come
in handy with Python?
Regards,
Bj?rn
Not a tutorial, but I found this little snippet:
http://www.ibiblio.org/obp/pyBiblio/tips/elkner/vim4python.php
I thought the last line was especially neat.
Will
--
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--
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Re: The Modernization of Emacs
On Tue, 19 Jun 2007 15:53:21 +0200, David Kastrup [EMAIL PROTECTED] wrote: Harry George [EMAIL PROTECTED] writes: I don't mind folks using any editor they want, as long as they are proficient. In those cases, I have no problem doing Extreme Programming with them -- code a bit, save, the other guy codes a bit. But when someone uses vi and then forgets how to do block moves, or uses eclipse and bogs down the session, or uses MS Notepad and can't enforce language-specific indents, I get frustrated. My favorite killing offence is /* vi:set ts=4: */. Apparently, we share at least part of that. My own favorite killing offense is '/* vi:set ts=anything: */' :) -- http://mail.python.org/mailman/listinfo/python-list
Re: The Modernization of Emacs: terminology buffer and keybinding
On Tue, 19 Jun 2007 10:01:35 -0700, Xah Lee [EMAIL PROTECTED] wrote: Here are some Frequently Asked Questions about The Modernization of Emacs. They are slightly lengthy, so i've separated each item per post. The whole article can be found at http://xahlee.org/emacs/modernization.html Q: The Terminology “buffer” and “keybinding” is good as they are. A: The terminology “buffer” or “keybinding”, are technical terms having to do with software programing. The term “keybinding” refers to the association of a keystroke with a command in a technical, software application programing context. That is to say, a programer “bind” a keystroke to a command in a software application. The term “buffer” refers to a abstract, temporary area for storing data, in the context of programing or computer science. These terms are irrelevant to the users of a software application. As a user of a text editor, he works with files. The terms “opened file” or “untitled file” are more appropriate than “buffer”. No they are not. See you may have a real *file* on a disk somewhere, which is called 'opened file' or even 'untitled file'. Now isn't it confusing to think in terms of made-up descriptiors, just because the term 'buffer' seems alien? Educating the user to avoid confusion in this and other cases of made up, 'user-friendly' descriptions is not a good enough answer. If you can educate the user about this sort of fine distinction between files stored on a disk somewhere and files which are figments of the imagination of Emacs, then I can educate them about 'buffer' too and be done with it all. The main difference is that I get to do it today, without the need for multi-thousand-line changes in the source and documentation of Emacs and its thousands of plugins. -- http://mail.python.org/mailman/listinfo/python-list
Re: Splitting SAX results
Gabriel Genellina wrote: Forget about SAX. Use ElementTree instead ElementTree is infinitely more flexible and easier to use. See http://effbot.org/zone/element-index.htm That's what I told him/her already :) Rephrasing a famous word: Being faced with an XML problem, you might think Ok, I'll just use SAX. And now you have two problems. SAX is a great way to hide your real problems behind a wall of unreadable code. If you want my opinion, lxml is currently the straightest way to get XML work done in Python. Stefan -- http://mail.python.org/mailman/listinfo/python-list
Re: Python/C API bug (multithreading)
Krzysztof W³odarczyk [EMAIL PROTECTED] wrote: I think I've found a bug in Python/C API and multithreading. You don't state your python version. There is an old bug about a similar issue :- http://mail.python.org/pipermail/python-dev/2005-May/053840.html http://sourceforge.net/tracker/index.php?func=detailaid=1163563group_id=5470atid=105470 Is there any simple way to fix this damned bug?? Locking, locking and more locking ;-) -- Nick Craig-Wood [EMAIL PROTECTED] -- http://www.craig-wood.com/nick -- http://mail.python.org/mailman/listinfo/python-list
Invisible processes in Win2K
Hi!
I'm running a Python program on M$ Windows 2000 as a test monitor. The program
should close various processes, mostly Application error-windows, as they are
created. This works fine until the screensaver gets active or until I press
Ctrl-Alt-Del and choose Lock my computer. At that point, my Python program
cannot see any change when a Application error pops up. Without locked
computer, it can identify these windows and close them, but I want it to do
this with the computer locked as well. (My company has a policy that says you
have to lock the computer or activate a password protected screensaver when you
leave your desk)
The code I'm using to list processes looks like this:
#
def process_callback_function(hwnd, resultdict):
# Callback-function for win32gui.EnumWindows
wtext = win32gui.GetWindowText(hwnd)
if wtext != '' and wtext != 'Default IME':
resultdict.update( {wtext:hwnd} )
#
def getProcessDictionary(w):
try:
win32gui.EnumWindows(process_callback_function, w)
except Exception, message:
logAndPrint('Error in getProcessDictionary: ' + str(message))
#
def getProcessList():
# Flush old cache
win32pdh.EnumObjects(None, None, 0, 1)
# Get a list of processes running on the system:
try:
junk, instances = win32pdh.EnumObjectItems(None,None,'Process',
win32pdh.PERF_DETAIL_WIZARD)
except win32api.error, message:
logAndPrint('Error in getProcessList(): ' + str(message))
return []
else:
return instances
#
# Code in main loop:
topWindows = {}
getProcessDictionary(topWindows)
for w in topWindows.iteritems():
...if 'Application Error' in w[0]:
...closeProcess(w[1])
I'm using two functions to receive process info: getProcessList and
getProcessDictionary. I have tried to save the result of these, compare them at
different times in the main loop and print newly started processes. This works
great outside locked computer-mode where it prints all new processes found,
including Application errors. But when the computer is locked and Application
errors pops up, the Python program shows no new processes. It's not hanged or
freezed, since it can identify the screensaver and also keep doing other work.
So what is so special about the error windows?
Any help with this is greatly appreciated!
Best regards,
/Henrik
--
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Re: caseless dictionary howto ?
Stefan Behnel wrote: Stef Mientki wrote: I need to search a piece of text and make all words that are equal (except their case) also equal in their case, based on the first occurrence. So I'm using a dictionary to store names and attributes of objects. As as I need to search on the caseless name (so I've choosen lowercase), My dictionairy looks like this: self.procs [ serial_hw_read ] = ( Serial_HW_Read, F, ++, T) I have no idea what the F, ++, T means at the end (if it's some kind of flags or attributes, This makes part of a simulation of a JAL (a Pascal like language for micros), and this dictionary builds up the namespace, used in translation JAL to pure Python. Serial_HW_Read = the name of a function F = the type of that function (procedure / function / pseudo variable / interrupt /..) ++ = the direction of each parameters, (input / output / input+output ) T = a tupple, containing the type of each of the parameters (bit / byte/ sbyte / word / ...) maybe a class to hold them would look better), maybe, but no human is looking at it ;-) but that's a good solution to the problem IMHO. Seeing the other solution, I indeed tend to stick to this solution, because it's the most simple one (certainly if you realize that the dictionary is generated by the program itself) cheers, Stef Mientki Stefan -- http://mail.python.org/mailman/listinfo/python-list
Re: DFW Pythoneers Meeting THIS Saturday
peter wrote: Just a tad arrogant, don't you think, to put a notice of some local event on an international forum without saying where it is? It says right in the subject line! DFW. If you don't know what DFW means, then it's probably not your local area. -- Michael Hoffman -- http://mail.python.org/mailman/listinfo/python-list
something similar to shutil.copytree that can overwrite?
I need to copy directories from one place to another, but it needs to overwrite individual files and directories rather than just exiting if a destination file already exists. Previous suggestions have focused on looking at the source for copytree, but it has several places where exceptions can be raised, and the documentation for the shutil functions that copytree is implemented in terms of isn't exactly clear about which exceptions get raised and when. This makes duplicating a one-line shell operation a non-trivial task. Has anybody got any pre-written code that does what I'm looking for? -- Ben Sizer -- http://mail.python.org/mailman/listinfo/python-list
Re: The Modernization of Emacs
Hi guys... This topic is not relevant in this mailing list. Though some info from an other mailing list. Emacs (and xemacs) runs perfectly well on non-gui environments as well. So keyboard commands are the only efficient way to work with. It is true, Emacs may be a bit antiquated, but it honed to an edge GUI tools are very far from. It is like a Formule-1 race car. You do not need automatic gears to drive it faster, do you? Learning Emacs is not easy but you can start with amazingly little knowledge. Skills come with usage. I know, I started it 10 years ago, well in the GUI era. Yes, vim. Very fine and powerfull tool, as good as Emacs. It is a quiestion of taste. I use both these times -- http://mail.python.org/mailman/listinfo/python-list
Re: poplib.retr doens't flag message as read
Gabriel Genellina wrote: The POP protocol has no concept of read or unread messages; the LIST command simply shows all existing messages. My mistake, I guess I was confused by the documentation retr( which) Retrieve whole message number which, and set its seen flag. Result is in form (response, ['line', ...], octets). What is the seen flag? Nothing it seems http://mail.python.org/pipermail/python-list/2005-July/329888.html Thanks for your help, EuGeNe -- http://www.3kwa.com -- http://mail.python.org/mailman/listinfo/python-list
Re: SimplePrograms challenge
André [EMAIL PROTECTED] writes: Ok, doctest-based version of the Unit test example added; so much more Pythonic ;-) Sorry for being a bit picky but there are a number of things that I'm unhappy with in that example. 1) It's the second example with 13 lines. Though I suppose that the pragmatism of pairing the examples overriding an implicit goal of the page is itself Pythonic. 2) assert is not the simplest example of doctest. The style should be add_money([0.13, 0.02]) 0.15 add_money([100.01, 99.99]) 200.0 add_money([0, -13.00, 13.00]) 0.0 3) which fails :-( So both the unittest and doctest examples ought to be redone to emphasize what they are doing without getting bogged down by issues of floating point representations. http://wiki.python.org/moin/SimplePrograms -- Pete Forman-./\.- Disclaimer: This post is originated WesternGeco -./\.- by myself and does not represent [EMAIL PROTECTED]-./\.- the opinion of Schlumberger or http://petef.port5.com -./\.- WesternGeco. -- http://mail.python.org/mailman/listinfo/python-list
Re: Python IDE
On Jun 19, 1:39 pm, Tom Gur [EMAIL PROTECTED] wrote: Hi, which IDE would you recommend for a python ? pydev (http://pydev.sourceforge.net) for Eclipse is Ok and has everything you will expect in a commercial IDE, including code refactoring, code intelligence, and a Python debugger. Being a Java SWT application it maybe slow, and make take a long time to start. Nowadays, when I need a quick and dirty solution, or when I need to test some code snippets interactively WITH _code completion_ I typically use PyScripter http://mmm-experts.com/Downloads.aspx?ProductId=4 JEdit (www.jedit.org) is another free and robust alternative with support for Python, if you install all the necessary plugins. I could not get the jPyDebug plugin to work, yet it is the only IDE that I know of which has support and syntax highlighting for PSP (Python Server Pages). To sum it up, here are some Python IDEs in my order of preference: PyScripter http://mmm-experts.com/Downloads.aspx?ProductId=4 JEdit (www.jedit.org) + jPyDebug plugin pydev (http://pydev.sourceforge.net) requires Eclipse WingIDE http://www.wingware.com/wingide ActiveState Komodo IDE (commercial) http://www.activestate.com/Products/Komodo/ ActiveState Komodo Edit (freeware, no debugger) http://www.activestate.com/Products/komodo_edit/ DrPython http://drpython.sourceforge.net/ PyPE http://pype.sourceforge.net/ BOA Constructor http://boa-constructor.sourceforge.net/ -- http://mail.python.org/mailman/listinfo/python-list
Non-blocking keyboard read
I am writing a curses application, but the getch() does not seem to give me all I want. Of course, if I press d, it returns an ord(d) and so on. But I want to be able to detect whether alt, shift or ctrl has been pressed also. Shift is normally covered by returning an uppercase character instead and ctrl seems to return control codes (as is normal, I guess), but alt I can't detect with getch, it seems. Preferably, I would like one of two things: 1) Having a getch() (or other function) that returns a code like now, but with different codes depending on the status of the ctrl, alt or shift keys, for instance by setting higher bits or something. Just as long as I can differentiate between d, D, ctrl+d, alt+d, shift +d and maybe ctrl+alt+d and ctrl+shift+d etc. 2) Having a way to read the keyboard status at any given time, for instance just reading a dictionary (or whatever) of bool for each key. So that key[KEY_D] == true when d is being pressed, and key[LEFT_ALT] == true when left alt is being pressed etc. 1) can of course be created from 2) which is lower level, so I would prefer 1) to save me some work. Also, are there problems with using a non-curses method of reading keyboard input, within a curses application? /David -- http://mail.python.org/mailman/listinfo/python-list
Re: Python's only one way to do it philosophy isn't good?
On Tue, 19 Jun 2007 19:22:33 -0700, Paul Rubin wrote: Steven D'Aprano [EMAIL PROTECTED] writes: So, once you've succeeded in your campaign to make Python more like Scheme, what language will you use for getting real work done? And how long will it take before Schemers start agitating for it to become more like Scheme? While you've dutifully searched the horizon for such intrusion, the rot has been quietly happening from within ;-). Nested scopes, first-class functions and closures, internal lambdas, and lazy evaluation streams (iterators) are all Schemish incursions into Python. List comprehensions and genexps come from even further in the functional-programming beyond. Soon Python will implement a type system based on the Lambda Cube, well maybe not. :) All of which makes Douglas Alan's accusations of Not Invented Here syndrome about Python seem rather silly. If there was ever a language that cherry-picked the best features of other languages, it was Python. If macros have been left out, it isn't because Guido has an irrational attitude of NIH. The point I was making isn't that Scheme/Lisp features are bad, but that there is no reason to slavishly follow Scheme just because it is(?) technically the most pure programming language. Well, obscurity might be a little harsh. Perhaps a lot harsh. I think so long as there are programmers who want to play with programming, there will be a place for Scheme, and that place will continue to be sneered at by the sort of people who just want the job done, never mind whether it is the purest, most lambda-calculus-esque way of doing it or not. I'm glad somebody understands lambda calculus and closures and meta- classes, and that those people have created Python so I don't have to. And I suspect that for every Douglas Alan enamored with Scheme, there are ten thousand programmers who just want to use a handful of pre-built tools to get the work done, never mind using macros to create the tools they need before they can even start. It sounds all fine and dandy to talk about creating your own control structures with macros. Been there, done that: when I was programming in Forth, I was so excited about the ability to define my own control structures. Great! Why be limited to boring old IF and WHILE and all the others, when I can create my own? But that quickly passed, because, let's be honest, there really aren't that many useful control structures. There is a reason that most languages offer the same old boring IFs and WHILEs and FORs, instead of exciting new ones. As a Python programmer, maybe I'd like to see a CASE statement, but I don't _really_ need it. That's just an optimization. Same for REPEAT UNTIL: it would be a nice to have, not a must have. Same for macros -- if there is a sufficiently compelling use case for macros, one which won't end up with Python code turning into a billion different mini-languages, then I have trust that the Python-dev folk will eventually add it into the language. But Scheme has macros isn't a justification for why Python should have them. -- Steven. -- http://mail.python.org/mailman/listinfo/python-list
Re: something similar to shutil.copytree that can overwrite?
On Jun 20, 5:30 pm, Ben Sizer [EMAIL PROTECTED] wrote: I need to copy directories from one place to another, but it needs to overwrite individual files and directories rather than just exiting if a destination file already exists. What version of Python do you have? Nothing in the source would make it exit if a target file exists. (Unless perhaps you have sym-links or the like.) Python 2.4.4 (#71, Oct 18 2006, 08:34:43) [MSC v.1310 32 bit (Intel)] copytree calls copy2 which calls copyfile from shutil.py: # def _samefile(src, dst): # Macintosh, Unix. if hasattr(os.path,'samefile'): try: return os.path.samefile(src, dst) except OSError: return False # All other platforms: check for same pathname. return (os.path.normcase(os.path.abspath(src)) == os.path.normcase(os.path.abspath(dst))) def copyfile(src, dst): Copy data from src to dst if _samefile(src, dst): raise Error, `%s` and `%s` are the same file % (src, dst) fsrc = None fdst = None try: fsrc = open(src, 'rb') fdst = open(dst, 'wb') copyfileobj(fsrc, fdst) finally: if fdst: fdst.close() if fsrc: fsrc.close() # -- http://mail.python.org/mailman/listinfo/python-list
Re: Python/C API bug (multithreading)
Nick Craig-Wood pisze: Krzysztof W³odarczyk [EMAIL PROTECTED] wrote: I think I've found a bug in Python/C API and multithreading. You don't state your python version. There is an old bug about a similar issue :- http://mail.python.org/pipermail/python-dev/2005-May/053840.html http://sourceforge.net/tracker/index.php?func=detailaid=1163563group_id=5470atid=105470 This is apparantly fixed in 2.4.2 despite the absence of anentry in the NEWS for that release. Python 2.4.1 and 2.4.4 - the same problem exists :( Is there any simple way to fix this damned bug?? Locking, locking and more locking ;-) damn true brother, thx -- Krzysztof Włodarczyk Centrum Technologii Mobilnych Mobiltek S.A. e-mail: [EMAIL PROTECTED] mobile: 502-525-035 This email is confidential and is intended for receipt solely by the individual or entity to which it is addressed. Any review, use, retention, distribution or disclosure by others is strictly prohibited. If you are not the intended recipient (or authorized to receive for the recipient), please contact the sender by reply email and delete all copies of this message. Thank you. -- http://mail.python.org/mailman/listinfo/python-list
Re: Python's only one way to do it philosophy isn't good?
On Tue, 19 Jun 2007 20:16:28 -0400, Douglas Alan wrote: Steven D'Aprano [EMAIL PROTECTED] writes: On Tue, 19 Jun 2007 17:46:35 -0400, Douglas Alan wrote: I think that most people who program in Scheme these days don't do it to write practical software. They either do it to have fun, or for academic purposes. On the other hand, most people who program in Python are trying to get real work done. Which is precisely why I program a lot in Python and very little in Scheme these days. It's nice to have the batteries included. So, once you've succeeded in your campaign to make Python more like Scheme, what language will you use for getting real work done? The problem with using Scheme for real work is that it doesn't come with enough batteries included and there isn't a big enough of a community behind it that uses it for real work. And yet there have been so many millions of dollars put into developing Lisp... I guess this is another example of perfection being the enemy of the good. All that development into Lisp/Scheme to make it the best, purest, most ideal programming language, with such flexibility and extensibility. that nobody wants to use it. You can write any library and macro system you need, but nobody has. I don't mean literally nobody, of course. Its a figure of speech. But it seems that people tend to program in Scheme for fun, or to stretch the boundaries of what's possible, and not to Get The Job Done. And how long will it take before Schemers start agitating for it to become more like Scheme? There is a huge gulf between the claim that Python needs to be more Scheme-like, and the fact that by your own admission you use Python, not Scheme, for real work. What benefit will be gained? The ability to directly explore some pretty mind-bending stuff ... in a hackerly, brain-expanding/brain-teaser kind of way? Well, go to MIT and take SICP and then the graduate-level sequel to the class, Adventures in Advanced Symbolic Programming, and then you'll see what some of the advantages would be. Are you suggesting that the only way to see the advantages of Scheme is to do a university course? A good multimethod system, e.g., would make Python a significantly nicer language for my purposes, for instance. http://en.wikipedia.org/wiki/Multimethod#Python For the record, I have a huge problem with NIH-syndrome, and think that every programming language in the world could learn a thing or two from what other languages have gotten right. Of course. And Python, more than most, has shamelessly copied features from other languages. So the question is, are Scheme macros one of those things that other languages have gotten right? Could they be a case of over-generalization? Or somewhere in between? -- Steven. -- http://mail.python.org/mailman/listinfo/python-list
Re: DFW Pythoneers Meeting THIS Saturday
It says right in the subject line! DFW. If you don't know what DFW means, then it's probably not your local area. Precisely -- http://mail.python.org/mailman/listinfo/python-list
Internationalised email subjects
I am writing a simple email program in Python that will send out
emails containing Chinese characters in the message subject and body.
I am not having any trouble getting the email body displayed correctly
in Chinese inside the email client, however the email subject and
sender name (which are also in Chinese) are garbled and are not
displayed correctly in the email client.
Here is the code snippet:
writer = MimeWriter.MimeWriter(out)
headers = {From: senderName + ' ' + senderName + '', To:
recipientEmail, Reply-to: senderEmail}
writer.addheader(Subject, subject)
writer.addheader(MIME-Version, 1.0)
writer.addheader('From', headers['From'])
writer.addheader('To', headers['To'])
writer.addheader('Reply-to', headers['Reply-to'])
I'm quite new to Python (and programming in general) and am having a
hard time wrapping my head around the internationalization functions
of Python, so was hoping someone could point me in the right
direction. Is there a different method I need to use in order for
the sender name and subject to be displayed correctly? Is there an
extra step I am missing? Some sample code would be very helpful.
Thanks!
--
http://mail.python.org/mailman/listinfo/python-list
Packing a simple dictionary into a string - extending struct?
Hello I want to serialise a dictionary, whose keys and values are ordinary strings (i.e. a sequence of bytes). I can of course use pickle, but it has two big faults for me. 1. It should not be used with untrusted data. 2. I want non-Python programs to be able to read and write these dictionaries. I don't want to use XML because: 1. It is verbose. 2. It forces other applications to load an XML parser. I've written, in about 80 lines, Python code that will pack and unpack (to use the language of the struct module) such a dictionary. And then I thought I might be reinventing the wheel. But so far I've not found anything much like this out there. (The closest is work related to 'binary XML' - http://en.wikipedia.org/wiki/Binary_XML.) So, what I'm looking for is something like and extension of struct that allows dictionaries to be stored. Does anyone know of any related work? -- Jonathan Fine -- http://mail.python.org/mailman/listinfo/python-list
Re: Q: listsort and dictsort - official equivalents?
On 6/20/07, Gabriel Genellina [EMAIL PROTECTED] wrote: It's not true that the sort must complete (or that the whole file must be read for that matter), Python has cool generators which makes the above possible. That's not possible, the input must be read completely before sorted() can output anything. Suppose the minimum element is at the end - until you read it, you can't output the very first sorted element. Doh! Yes of course. I always thought that sorted() returned a generator. Since Python's sort is based on merge sort, using a generator approach it should at least be theoretically possible to begin emitting the items before the sort operation completes. -- mvh Björn -- http://mail.python.org/mailman/listinfo/python-list
Re: The Modernization of Emacs
[Xah Lee [EMAIL PROTECTED]] | | | SIMPLE CHANGES if I were to suggest improvements to Emacs, the things you mention are probably among the last things I'd even consider. the problem with Emacs is not really the nomenclature or the keybindings. the problem is that it needs to do what it already does better. My frustration with Emacs has mostly been that Emacs-Lisp is a bit too limiting. It is too slow and the codebase is a bit messy. or at least it was the last time I tried to do something in Emacs-Lisp a couple of years ago. it would also be beneficial if there was a more proper and well-organized standard library for Emacs to make developing Emacs applications easier. for programmers, Emacs is a pretty good editor already, but there is a bit of a threshold for extending Emacs. -Bjørn -- http://mail.python.org/mailman/listinfo/python-list
Re: Internationalised email subjects
From:
http://docs.python.org/lib/module-email.header.html
from email.message import Message
from email.header import Header
msg = Message()
h = Header('p\xf6stal', 'iso-8859-1')
msg['Subject'] = h
print msg.as_string()
Subject: =?iso-8859-1?q?p=F6stal?=
/Martin
--
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Re: SimplePrograms challenge
--- Pete Forman [EMAIL PROTECTED] wrote: André [EMAIL PROTECTED] writes: Ok, doctest-based version of the Unit test example added; so much more Pythonic ;-) Sorry for being a bit picky but there are a number of things that I'm unhappy with in that example. Your pickiness is appreciated. :) 1) It's the second example with 13 lines. Though I suppose that the pragmatism of pairing the examples overriding an implicit goal of the page is itself Pythonic. Since you looked at the page, I have corrected that by making the example above it 12 lines, so that's no longer an issue. 2) assert is not the simplest example of doctest. The style should be add_money([0.13, 0.02]) 0.15 add_money([100.01, 99.99]) 200.0 add_money([0, -13.00, 13.00]) 0.0 That's not clear cut to me. I think vertical conciseness has an advantage for readability, as it means you get to keep more real code on the screen. 3) which fails :-( So both the unittest and doctest examples ought to be redone to emphasize what they are doing without getting bogged down by issues of floating point representations. I was the one who originally posted the floating point example (with yet another style of unit testing, BTW), and I agree that the subtleties of floating point do kind of cloud the issue. I welcome a better example. What I didn't realize is that there's an actual error. Are you saying the program fails? On which test? ___ You snooze, you lose. Get messages ASAP with AutoCheck in the all-new Yahoo! Mail Beta. http://advision.webevents.yahoo.com/mailbeta/newmail_html.html -- http://mail.python.org/mailman/listinfo/python-list
Re: Q: listsort and dictsort - official equivalents?
--- BJörn Lindqvist [EMAIL PROTECTED] wrote: On 6/20/07, Gabriel Genellina [EMAIL PROTECTED] wrote: It's not true that the sort must complete (or that the whole file must be read for that matter), Python has cool generators which makes the above possible. That's not possible, the input must be read completely before sorted() can output anything. Suppose the minimum element is at the end - until you read it, you can't output the very first sorted element. Doh! Yes of course. I always thought that sorted() returned a generator. Since Python's sort is based on merge sort, using a generator approach it should at least be theoretically possible to begin emitting the items before the sort operation completes. I think Gabriel was making the point that the *input* to sorted() cannot be a generator, even thought sorted() itself could in theory be a generator with the right underlying implementation (e.g. heapsort). It's not unrealistic at all to have an indeterminate sequence of events that you occasionally want to pop results off of in sorted order, with the obvious limitation that you haven't yet seen future inputs from the input iteration. The way to express that is by using some kind of heap, though. I don't really see how you'd use the heap as a generator in that case, though. Building a website is a piece of cake. Yahoo! Small Business gives you all the tools to get online. http://smallbusiness.yahoo.com/webhosting -- http://mail.python.org/mailman/listinfo/python-list
Re: Packing a simple dictionary into a string - extending struct?
In [EMAIL PROTECTED], Jonathan Fine wrote: I want to serialise a dictionary, whose keys and values are ordinary strings (i.e. a sequence of bytes). Maybe you can use ConfigObj_ or JSON_ to store that data. Another format mentioned in the binary XML article you've linked in your post is `ASN.1`_. And there's a secure alternative to `pickle` called cerealizer_. .. _`ASN.1`: http://pyasn1.sourceforge.net/ .. _cerealizer: http://home.gna.org/oomadness/en/cerealizer/ .. _ConfigObj: http://www.voidspace.org.uk/python/configobj.html .. _JSON: http://www.json.org/ Ciao, Marc 'BlackJack' Rintsch -- http://mail.python.org/mailman/listinfo/python-list
Re: Packing a simple dictionary into a string - extending struct?
On 6/20/07, Jonathan Fine [EMAIL PROTECTED] wrote: Hello I want to serialise a dictionary, whose keys and values are ordinary strings (i.e. a sequence of bytes). I can of course use pickle, but it has two big faults for me. 1. It should not be used with untrusted data. 2. I want non-Python programs to be able to read and write these dictionaries. I don't want to use XML because: 1. It is verbose. 2. It forces other applications to load an XML parser. I've written, in about 80 lines, Python code that will pack and unpack (to use the language of the struct module) such a dictionary. And then I thought I might be reinventing the wheel. But so far I've not found anything much like this out there. (The closest is work related to 'binary XML' - http://en.wikipedia.org/wiki/Binary_XML.) So, what I'm looking for is something like and extension of struct that allows dictionaries to be stored. Does anyone know of any related work? What about JSON? You can serialize your dictionary, for example, in JSON format and then unserialize it in any language that has a JSON parser (unless it is Javascript). -- http://srid.nearfar.org/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Help With Better Design
[EMAIL PROTECTED] a écrit : Greetings, I have been working on a little project today to help me better understand classes in Python (I really like Python). I am a self taught programmer and consider myself to fall in the beginner category for sure. It was initially sparked by reading about state machines. This was my attempt at it however I feel it is not quite where it should be: First, a few general comments ON = ON OFF = OFF class LightBulb: Better to use newstyle classes: class LightBulb(object): def __init__(self, initial_state): self.state = initial_state def TurnOn(self): Pep-08 (naming conventions): def turn_on(self): if self.state == OFF: self.state = ON else: print The Bulb Is Already ON! def TurnOff(self): if self.state == ON: self.state = OFF else: print The Bulb Is Aleady OFF! What about: class LightBulb(object): def __init__(self, state): self.state = state def switch(self): self.state = not self.state (snip) I would like to be able to get a good hold of the concept state machines ? with this example before I try to model a more complex problem. Would someone be willing to give me some feedback on this class and whether I am on the right track or how I might better go about it? There is a lot to say about OO and state machines. Someone once defined the use of OO in simulations as building an big unpredictable state machine from small predictable state machines. As a matter of fact, objects are (most of the time) informal state machines (they have state, and they have behaviour depending on state). Now there are much more formal state machines (google for FSM or finite state machine) - which can be implemented in a lot of ways - including the State design pattern. Before jumping to implementation, you should probably try to model the more complex problem with something like UML state diagram (one of the few usable things in UML). My 2 cents -- http://mail.python.org/mailman/listinfo/python-list
Re: Does altering a private member decouple the property's value?
Ben Finney a écrit : Ethan Kennerly [EMAIL PROTECTED] writes: I really like properties for readonly attributes, Python doesn't have readonly attributes, Err... Ever tried to set a class mro ?-) and to attempt to use properties for that purpose will only lead to confusion. read-only attributes actually are one of the common use-case for properties. -- http://mail.python.org/mailman/listinfo/python-list
Re: Using a switch-like if/else construct versus a dictionary?
Ahh .. yes of course, you are right. I mis-typed. I like how you
defined the dictionary all in one statement, though. I didn't think
of doing it that way.
-- Arcadio
On Jun 19, 4:11 pm, heltena [EMAIL PROTECTED] wrote:
asincero ha escrit:
def foo():
def doCase1():
pass
def doCase2():
pass
def doCase3():
pass
def doCase4():
pass
def doCase5():
pass
handle_case = {}
handle_case[1] = doCase1()
handle_case[2] = doCase2()
handle_case[3] = doCase3()
handle_case[4] = doCase4()
handle_case[5] = doCase5()
Sorry, but I think this is not correct. Now, you put the result of the
function call into the dictionary, but you want the function address.
The correct code is:
handle_case = {}
handle_case[1] = doCase1
handle_case[2] = doCase2
handle_case[3] = doCase3
handle_case[4] = doCase4
handle_case[5] = doCase5
Or:
handle_case = { 1: doCase1, 2: doCase2, 3: doCase3, 4: doCase4, 5:
doCase 5 }
Or:
try:
{ 1: doCase1, 2: doCase2, 3: doCase3, 4: doCase4, 5: doCase 5 }
[c]()
except:
print Catch the correct exception
But this solutions only works fine if the params of the functions are
the same for all calls (in if/else construct you don't need it).
Bye!
--
Helio Tejedor
--
http://mail.python.org/mailman/listinfo/python-list
Re: Packing a simple dictionary into a string - extending struct?
What about JSON? You can serialize your dictionary, for example, in JSON format and then unserialize it in any language that has a JSON parser (unless it is Javascript). There is an implementation available for python called simplejson, available through easy_install. Diez -- http://mail.python.org/mailman/listinfo/python-list
Re: DFW Pythoneers Meeting THIS Saturday
peter wrote: It says right in the subject line! DFW. If you don't know what DFW means, then it's probably not your local area. Precisely Precisely what? You complained that the OP didn't provide the location of the event, which he did. You also resorted to needless name-calling as a result of your mistake, which I don't think enhances the usefulness of this forum. What exactly are you trying to achieve? -- Michael Hoffman -- http://mail.python.org/mailman/listinfo/python-list
Re: The Modernization of Emacs: terminology buffer and keybinding
[Xah Lee [EMAIL PROTECTED]] to be quite honest, your proposal seems to largely be based on ignorance. | A: The terminology “buffer” or “keybinding”, are technical terms | having to do with software programing. The term “keybinding” refers to | the association of a keystroke with a command in a technical, software | application programing context. That is to say, a programer “bind” a | keystroke to a command in a software application. The term “buffer” | refers to a abstract, temporary area for storing data, in the context | of programing or computer science. the term buffer is used extensively outside the computer science domain, so it is not a CS only term. in an editor it is actually a quite sensible name since it abstracts things a bit. for instance a buffer need not be associated with a file. nor does it make any assumptions about the way it is displayed (as opposed to window or tab). | These terms are irrelevant to the users of a software application. they are very relevant to me, and I am very much a user of Emacs. and again, they provide good abstractions. | As a user of a text editor, he works with files. learn Emacs before you criticize it. your assumption is wrong. in emacs you work on _buffers_. buffers often do not have files associated with them. | The terms “opened file” or “untitled file” are more appropriate than | “buffer”. Since emacs is also used for many things beside reading | files or writing to files, for example, file management, ftp/sftp, | shell, email, irc etc., the proper term can be “panel”, “window”, or | “work area”. panel and window refer to UI-elements. the buffer concept does not map 1:1 to any of these. substituting work area for buffer doesn't seem like a better abstraction. especially not if you see it in the context of how Emacs relates to buffer contents. | And, the term “keyboard shortcut” refers to typing of a key- | combination to activate a command. It is also more appropriate than | “binding” or “keybinding”. why? if anything the term shortcut seems to imply that there is a primary route to executing the function in question -- which more often than not isn't the case. keybinding is a more precise term. | Although concepts like “buffer” and “keybinding” are seemingly | interchangeable with “panel” or “keyboard shortcut”, but their | contexts set them apart. they are interchangeable only if you have no idea what you are talking about. you obviously have not bothered to have a proper look at Emacs and think these things through properly. | This is why in all modern software application's user | documentations, terms like “buffer” or “keybinding” are not to be | seen but “windows, panes, and keyboard shortcuts”. most modern editors are built on different premises than Emacs and many have a far simpler view of the world. extremely few of them even come close to Emacs in defining what is in practice an operating environment for applications. it makes sense to refer to windows when in fact you are referring to windows. it doesn't make sense to call buffers windows in Emacs; because they are not. | The reason emacs uses the technical terminologies throughout is | because when emacs started in the 1970s, there really isn't any other | text editors or even software applications. the abstractions you mention are sensible ones independently of when they were concieved. just because other people came along later and used different abstractions, doesn't mean that the ones used in Emacs are wrong, inferior or inappropriate. if you had bothered to understand Emacs properly, you would have found that some of the abstractions used make a lot of sense in an editor. | Changes in society are always resisted by old timers, but it is also a | main element behind progress. I've been in the computer industry long enough to have seen quite a few cycles of re-invention. each cycle you learn something about which inventions were good and which were bad. a common thread if you look at the survival rate of products and ideas is that it isn't always the best product or idea that wins. often something new comes along to replace something old. sometimes it is better than what you had before, but often it is not really better, just different. a good example is the web and the applications we implement in terms of the web. take forums for instance. in a strict technical sense, web-based forums are inferior to NNTP-based forums. (I am sure you can make the comparison yourself). yet NNTP-based discussion is not growing at the same rate as web forums. the net has chosen its preferred technology, and it wasn't because the web-based discussion forums were so much more technically refined that the majority chose them. for my uses, web forums are a huge step back from NNTP. | This terminology issue may seem trivial, but its importance lies in | making emacs palpable to the vast number of people who ever need to | use a computer to write. why? Emacs
Re: DFW Pythoneers Meeting THIS Saturday
Precisely what? You complained that the OP didn't provide the location of the event, which he did. Well, where is DFW? -- http://mail.python.org/mailman/listinfo/python-list
Re: Does altering a private member decouple the property's value?
Ethan Kennerly a écrit : Hello, There are a lot of Python mailing lists. I hope this is an appropriate one for a question on properties. It is. I am relatively inexperienced user of Python. I came to it to prototype concepts for videogames. Having programmed in C, scripted in Unix shells, and scripted in a number of proprietary game scripting languages, I'm impressed at how well Python meets my needs. In almost all respects, it does what I've been wishing a language would do. So welcome onboard !-) One example is properties. I really like properties for readonly attributes, and their ability to make the interface more elegant, by hiding uninteresting methods (like dumb get/set accessors). FWIW, since Python has properties, you often just don't need the getter/setter pairs. Start with a plain publi attribute, then switch to a computed one (using property or a custom descriptor) if and when needed. But a gotcha bit me in the behavior of properties that I didn't expect. If another function accesses an underlying data member of a property, then the data member returned by the property is no longer valid. Here is a session example. class a_class: oops ! properties don't work properly with old-style classes. Use a new-style class instead: class AClass(object): ... def __init__( self ): self.__p = None ... def __set_p( self, new_p ): self.__p = new_p Take care, the name mangling invoked by the '__name' scheme may lead to undesired results. This feature should only be used when you want to make sure an attribute will not be accidentally used in a derived class. The idiomatic way to mark an attribute as implementation is a single leading underscore, ie: '_name'. ... def reset( self ): self.__p = None ... p = property( lambda self: self.__p, __set_p ) ... (snip) I had wanted to access the private data member in the class to avoid side-effects of the set method. Can someone show me how to reference the data member underlying a property and update the property without calling the property set method? cf above. While we're at it, everything in Python being an object - yes, functions and methods too -, and there's nothing like a private modifier in Python. So s/private data member/implementation attribute/ !-) By the way, I thought maybe that a variable outside of an __init__ method would be static, An attribute defined in the class body (ie not in a method) becomes a class attribute (shared by all instances). but as far as I can tell, it is dynamic. For example, the following class appeared equivalent to the above for tests. class a_class: ... __p = None # No __init__ here, you create a class attribute ... def __set_p( self, new_p ): self.__p = new_p And here, you create an instance attribute that will shadow the class attribute. I preferred not having the __init__ for this example and my prototype, because I wasn't doing anything fancy, and it meant one less method that the programmer needed to see. There are other ways to obtain the same result. Like defining the __new__ method (the proper constructor). (snip the rest) I think you should take some time to learn the Python object model - trying to apply C++/Java concepts to Python won't do it. Articles about new-style classes and descriptors on python.org should be a good starting point. My 2 cents... -- http://mail.python.org/mailman/listinfo/python-list
RE: Execute script on remote computer
Thanx for your reply, I have successfully executed the script on a remote machine and store the log file on the local as well as on the remote machine. But one problem what I am facing is How to run 2 or more scripts on remote machine (agent will run on my local machine) and then saving the SINGLE copy of log files of all the scripts on my local machine. All machine are operating on window XP ThanksRegards, Vikas Saini Do or do not. There is no try. From: rishi pathak [mailto:[EMAIL PROTECTED] Sent: Wednesday, June 20, 2007 10:09 AM To: Vikas Saini Cc: python-list@python.org Subject: Re: Execute script on remote computer Does the script resides on the remote machine or do we have to transfer the script to the remote machine.If remote and agent machine are linux then you can use rsh/ssh to do so. On 6/19/07, Vikas Saini [EMAIL PROTECTED] wrote: I am trying to run the agent on one machine that will execute the script of a remote machine. Could you please help me in this regards. vikas Legal Disclaimer: This electronic message and all contents contain information from Cybage Software Private Limited which may be privileged, confidential, or otherwise protected from disclosure. The information is intended to be for the addressee(s) only. If you are not an addressee, any disclosure, copy, distribution, or use of the contents of this message is strictly prohibited. If you have received this electronic message in error please notify the sender by reply e-mail to and destroy the original message and all copies. Cybage has taken every reasonable precaution to minimize the risk of malicious content in the mail, but is not liable for any damage you may sustain as a result of any malicious content in this e-mail. You should carry out your own malicious content checks before opening the e-mail or attachment. www.cybage.com http://www.cybage.com -- http://mail.python.org/mailman/listinfo/python-list -- Regards-- Rishi Pathak National PARAM Supercomputing Facility Center for Development of Advanced Computing(C-DAC) Pune University Campus,Ganesh Khind Road Pune-Maharastra -- http://mail.python.org/mailman/listinfo/python-list
Re: Packing a simple dictionary into a string - extending struct?
On Jun 20, 9:19 pm, Jonathan Fine [EMAIL PROTECTED] wrote:
Hello
I want to serialise a dictionary, whose keys and values are ordinary strings
(i.e. a sequence of bytes).
I can of course use pickle, but it has two big faults for me.
1. It should not be used with untrusted data.
2. I want non-Python programs to be able to read and write these
dictionaries.
I don't want to use XML because:
1. It is verbose.
2. It forces other applications to load an XML parser.
I've written, in about 80 lines, Python code that will pack and unpack (to
use the language of the struct module) such a dictionary. And then I
thought I might be reinventing the wheel. But so far I've not found
anything much like this out there. (The closest is work related to 'binary
XML' -http://en.wikipedia.org/wiki/Binary_XML.)
So, what I'm looking for is something like and extension of struct that
allows dictionaries to be stored. Does anyone know of any related work?
C:\junkcopy con adict.csv
k1,v1
k2,v2
k3,v3
^Z
1 file(s) copied.
C:\junk\python25\python
Python 2.5.1 (r251:54863, Apr 18 2007, 08:51:08) [MSC v.1310 32 bit
(Intel)] on win32
Type help, copyright, credits or license for more information.
import csv
adict = dict(csv.reader(open('adict.csv', 'rb')))
adict
{'k3': 'v3', 'k2': 'v2', 'k1': 'v1'}
csv.writer(open('bdict.csv', 'wb')).writerows(adict.iteritems())
^Z
C:\junktype bdict.csv
k3,v3
k2,v2
k1,v1
C:\junk
Easy enough?
HTH,
John
--
http://mail.python.org/mailman/listinfo/python-list
Re: The Modernization of Emacs: terminology buffer and keybinding
[Giorgos Keramidas [EMAIL PROTECTED]] | | Educating the user to avoid confusion in this and other cases of made | up, 'user-friendly' descriptions is not a good enough answer. there are two types of user friendly. there's user friendly and then there is beginner friendly which is often mislabeled. the latter is more important for applications which are to be used casually. like utilities you only use once or twice per year -- those need to be beginner friendly. for applications you are likely to use for prolonged periods of time (like programming, video editing, music production etc), it does not make sense to optimize for beginner friendly. at least not at the cost of making the application less user friendly. applications you spend a lot of time using are worth an investment in learning how to use them. what creates friction in an application you know reasonably well is when common tasks are fiddly. for instance, while menus are often good for casual use and lower the initial threshold for absolute beginners, depending heavily on menu navigation becomes too fiddly if you are performing a certain task 2-3 times per minute. it is not _user_ friendly. Emacs is rather user friendly, but not very beginner friendly. when I was first confronted with it, the sort of text editors I was used to were Wordstar and derivatives of it. I was rather annoyed that it didn't do what I expected, so I just used a different editor. a few years later I bemoaned the fact that Emacs was so hard to use during a conversation with a friend. he asked me if I had actually made an effort to learn Emacs, which of course I hadn't. so I figured I might as well give it a shot. following the tutorial that comes with Emacs (and which is referred to in the startup message) I spent a couple of hours one afternoon learning the basics. already the next day I started using Emacs for programming. the week after I had progressed to using it as my newsreader (which I still do to this day) and eventually I started reading my email in Emacs. perhaps two months after I had sat down to learn Emacs I wrote my first Emacs extensions in Emacs Lisp. mostly simple stuff to make common programming tasks easier. I found Emacs to be user friendly, but in a different sense than the, IMHO faulty definition, beginner friendly. Emacs let me, as a user, do more with less effort and provides a lot less friction than many other developer tools I've used. at work I use it extensively, and we have lots of neat extensions that really save a lot of time. -Bjørn -- http://mail.python.org/mailman/listinfo/python-list
Re: SimplePrograms challenge
Steve Howell [EMAIL PROTECTED] writes: 2) assert is not the simplest example of doctest. The style should be add_money([0.13, 0.02]) 0.15 add_money([100.01, 99.99]) 200.0 add_money([0, -13.00, 13.00]) 0.0 That's not clear cut to me. I think vertical conciseness has an advantage for readability, as it means you get to keep more real code on the screen. What I meant was that doctest should be type this into the interpreter and you should see that. A doctest is not a unit test, though it may form a subset of the tests. There should only be enough doctests to enclue a human reader. Comprehensive testing should use a larger framework. Doctests in separate files can do this but I would use py.test, or alternatives like nose or Testoob. 2 + 2 4 assert 2 + 2 == 4 is a concise way of writing a unit test but it is not the best way to use doctest IMHO. 3) which fails :-( So both the unittest and doctest examples ought to be redone to emphasize what they are doing without getting bogged down by issues of floating point representations. I was the one who originally posted the floating point example (with yet another style of unit testing, BTW), and I agree that the subtleties of floating point do kind of cloud the issue. I welcome a better example. What I didn't realize is that there's an actual error. Are you saying the program fails? On which test? Python 2.5.1 on XP: Failed example: add_money([0.13, 0.02]) Expected: 0.15 Got: 0.14999 -- Pete Forman-./\.- Disclaimer: This post is originated WesternGeco -./\.- by myself and does not represent [EMAIL PROTECTED]-./\.- the opinion of Schlumberger or http://petef.port5.com -./\.- WesternGeco. -- http://mail.python.org/mailman/listinfo/python-list
Re: DFW Pythoneers Meeting THIS Saturday
Joe Riopel wrote: Precisely what? You complained that the OP didn't provide the location of the event, which he did. Well, where is DFW? Google, first hit: The Dallas Ft. Worth Pythoneers They even have their own website. So - what's the fuss about? The BayPIGgies also announce their meetings here. I don't mind, even though Berlin is about 10-12 hours away on a jet-plane. diez -- http://mail.python.org/mailman/listinfo/python-list
Re: caseless dictionary howto ?
On Wed, 2007-06-20 at 11:14 +0200, stef wrote: Stefan Behnel wrote: Serial_HW_Read = the name of a function F = the type of that function (procedure / function / pseudo variable / interrupt /..) ++ = the direction of each parameters, (input / output / input+output ) T = a tupple, containing the type of each of the parameters (bit / byte/ sbyte / word / ...) maybe a class to hold them would look better), maybe, but no human is looking at it ;-) But humans might look at the code that looks at the thing. thing.func_type is self-documenting, thing[0] is not. -- Carsten Haese http://informixdb.sourceforge.net -- http://mail.python.org/mailman/listinfo/python-list
Re: The Modernization of Emacs
Just so everyone's clear: Nothing he has said makes much sense, if any. He's talking about advocacy of something unique and powerful by - making it less unique and powerful-. Not merely catering to the lowest common denominator, but promoting something as better -by making it worse-. Who does that? Imagine that a man invents a vehicle that's far safer and more maneuverable than any existing vehicle. Imagine that the increased safety comes from the fact that it has five wheels. How incredibly stupid would it be for that inventor to then say, I'm going to convince people to buy my new vehicle, which is safer thanks to this fifth wheel. But in order to market it, I'll take the fifth wheel off, so it's more familiar and comfortable for them. I'm very, very new to emacs. I used it a little this past year in college, but I didn't try at all to delve into its features. I'm starting that process now, and frankly, the thought of it changing - already- upsets me. I don't feel like the program ought to change in order to accommodate me. I'm excited about the prospect of mastering something new and different. The fewer resemblances to the common- denominator, extra-friendly stuff I've worked with in the past, the better. Emacs' uniqueness may hurt its adoption rate, but it still has plenty of users, who are all perfectly happy with how things are done. -Andrew -- http://mail.python.org/mailman/listinfo/python-list
Re: SimplePrograms challenge
--- Pete Forman [EMAIL PROTECTED] wrote: Steve Howell [EMAIL PROTECTED] writes: 2) assert is not the simplest example of doctest. The style should be add_money([0.13, 0.02]) 0.15 add_money([100.01, 99.99]) 200.0 add_money([0, -13.00, 13.00]) 0.0 That's not clear cut to me. I think vertical conciseness has an advantage for readability, as it means you get to keep more real code on the screen. What I meant was that doctest should be type this into the interpreter and you should see that. A doctest is not a unit test, though it may form a subset of the tests. There should only be enough doctests to enclue a human reader. Comprehensive testing should use a larger framework. Doctests in separate files can do this but I would use py.test, or alternatives like nose or Testoob. 2 + 2 4 assert 2 + 2 == 4 is a concise way of writing a unit test but it is not the best way to use doctest IMHO. 3) which fails :-( So both the unittest and doctest examples ought to be redone to emphasize what they are doing without getting bogged down by issues of floating point representations. I was the one who originally posted the floating point example (with yet another style of unit testing, BTW), and I agree that the subtleties of floating point do kind of cloud the issue. I welcome a better example. What I didn't realize is that there's an actual error. Are you saying the program fails? On which test? Python 2.5.1 on XP: Failed example: add_money([0.13, 0.02]) Expected: 0.15 Got: 0.14999 Ok, you make a lot of good points. I was the original author of the page, so I'll make a few points. 1) Your attention to detail is greatly appreciated. At the very least, I don't want the examples to be broken. I tested the above on Unix 2.5, and they worked, but it was obviously just luck, as the implementation is clearly broken. (Actually, it's not so much the implementation--it's the interface, which should just return pennies.) 2) Both the unittest and doctest examples are probably broken. 3) I'd like for unittest and doctest example to show up somewhere on the page, but perhaps they merit longer examples. 4) I don't use doctest myself. It never hit my sweet spot, mostly because I prefer external unit tests. So I'm not the best person to judge the most idiomatic way to write them. 5) My biggest goal for the page is that examples are simple and mostly uncontroversial. 6) It was pointed out when I originally wrote this example that the solution to money rounding is, of course, to use a Decimal data type. 7) Feel free to change the page as you see fit, although thanks for discussing it here first. It's here! Your new message! Get new email alerts with the free Yahoo! Toolbar. http://tools.search.yahoo.com/toolbar/features/mail/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Packing a simple dictionary into a string - extending struct?
Sridhar Ratna [EMAIL PROTECTED] wrote in message What about JSON? You can serialize your dictionary, for example, in JSON format and then unserialize it in any language that has a JSON parser (unless it is Javascript). Thank you for this suggestion. The growing adoption of JSON in Ajax programming is a strong argument for my using it in my application, although I think I'd prefer something a little more binary. So it looks like I'll be using JSON. Thanks. Jonathan -- http://mail.python.org/mailman/listinfo/python-list
Re: The Modernization of Emacs
Kaldrenon [EMAIL PROTECTED] writes: I'm very, very new to emacs. I used it a little this past year in college, but I didn't try at all to delve into its features. I'm starting that process now, and frankly, the thought of it changing - already- upsets me. I don't feel like the program ought to change in order to accommodate me. Actually, the E in Emacs stands for extensible. Part of the appeal of Emacs is that you can change it to accommodate you. I'm excited about the prospect of mastering something new and different. The fewer resemblances to the common- denominator, extra-friendly stuff I've worked with in the past, the better. Emacs' uniqueness may hurt its adoption rate, but it still has plenty of users, who are all perfectly happy with how things are done. Oh, but Emacs is not TeX: it _is_ being developed further. And some changes are done in order to synchronize Emacs with the other world where the latter has been oversleeping. For example, Emacs 23 will internally use utf-8/Unicode as its encoding when it has used emacs-mule up to now, a multibyte code of its own. In spirit, this will not change Emacs much, yet it will remove other-world friction and make Emacs more obviously the incarnation of editing descended into this world. -- David Kastrup -- http://mail.python.org/mailman/listinfo/python-list
Re: Internationalised email subjects
Thanks Martin, I actually have read that page before. The part that
confuses me is the line:
h = Header('p\xf6stal', 'iso-8859-1')
I have tried using:
h = Header(' ', 'GB2312')
but when I run the code, I get the following error:
UnicodeDecodeError: 'gb2312' codec can't decode bytes in position 2-3:
illegal multibyte sequence
Is there something I need to do in order to encode the Chinese
characters into the GB2312 character set?
--
http://mail.python.org/mailman/listinfo/python-list
Re: static python classes ?
On 2007-06-19, Bjoern Schliessmann
[EMAIL PROTECTED] wrote:
Diez B. Roggisch wrote:
With other OOP languages you mean Java. Which does have static
methods because they lack the notion of a function by its own,
so the shoehorned them into their everything is inside a
class-paradigm.
ACK, but doesn't C++ have static methods too?
C++ does have what it calls static member functions.
class foo
{
public:
static void bar() { /* nada */ }
};
Python names a similar thing a @staticmethod (the name taken from
C++, obviously, since C++ originated the essentially meaningless
word-grouping static member function in order to reuse an
existing keyword).
// It may be called with two different syntaxes, as in Python:
void goo()
{
// ...using the qualified name:
foo::bar();
// ...or with an instance of the class:
foo f;
f.bar();
}
In C++ they are used most often for factory functions, since they
conveniently have access to the class's private members, and
don't want or need an existing instance. Python seems to have
adopted this use-case (ConfigParser, for example), but without a
need for it (code organization?).
--
Neil Cerutti
I am free of all prejudices. I hate everyone equally. --W. C. Fields
--
http://mail.python.org/mailman/listinfo/python-list
Re: The Modernization of Emacs
On Jun 20, 9:28 am, David Kastrup [EMAIL PROTECTED] wrote: Kaldrenon [EMAIL PROTECTED] writes: I'm very, very new to emacs. I used it a little this past year in college, but I didn't try at all to delve into its features. I'm starting that process now, and frankly, the thought of it changing - already- upsets me. I don't feel like the program ought to change in order to accommodate me. Actually, the E in Emacs stands for extensible. Part of the appeal of Emacs is that you can change it to accommodate you. Well put. Perhaps I should have said that I don't feel like the program ought to change to accommodate -everybody-. I know that Emacs is still being worked on, is still growing and changing, and also that, because of its extensibility, anyone can change it as they wish. In fact, if the OP wants Emacs to behave the way he describes, I'm sure it's doable. But my statement was that the changes he suggests are things that should not be enforced universally, because not only is there nothing wrong with the things he suggests changing, but the idea of enforcing uniform changes is not entirely in the spirit of Emacs. -- http://mail.python.org/mailman/listinfo/python-list
How to code dynamically created methods?
I've tried a bazillion ways to code dynamically generated methods, to no avail. The following snippet is a very simplified (and artificial) demo of the problem I'm running into, featuring my latest attempt at this. The idea here is to use __getattr__ to trap any attempt to invoke a nonexistent method, have it return a generic handler called _auto which creates the new method dynamically, invokes it, and installs it in the class, so that subsequent calls to the same method go directly to the newly created method, instead of to __getattr__. It is this last step, the installation of the new method, that is giving me problems. class A( object ): def __getattr__( self, name ): self._auto_name = name return self._auto def hello( self, name ): print hi! my name is %s % name def _auto( self, *args ): name = self._auto_name def m( self, *args ): self.hello( name ) m( self, *args ) m = classmethod( m ) setattr( A, name, m ) x = A() x.foo() # ok x.foo() # bombs reload(test) hi! my name is foo Traceback (most recent call last): File stdin, line 1, in ? File test.py, line 19, in ? x.foo() File test.py, line 12, in m self.hello( name ) TypeError: unbound method hello() must be called with A instance as first argument (got str instance instead) I'm sure that the problem is with my naive attempt to add a method to class A dynamically (in the last two lines of the definition of _auto). What's the right way to do this? Thanks! kj -- NOTE: In my address everything before the first period is backwards; and the last period, and everything after it, should be discarded. -- http://mail.python.org/mailman/listinfo/python-list
How to hide a program?
Hi all, I've created a program that receives files and opens the corresponding program (for example adobe acrobat). However, when started, i would like to see nothing of the running program. I only want to see the program that will be opened. Is it possible to start a program 'hidden' or minimized to at least the system tray? And, if yes., could some one help me on this? Thanks already! Jeroen -- http://mail.python.org/mailman/listinfo/python-list
Re: How to code dynamically created methods?
Nevermind, I found the problem... Thanks, kj In [EMAIL PROTECTED] kj [EMAIL PROTECTED] writes: I've tried a bazillion ways to code dynamically generated methods, to no avail. The following snippet is a very simplified (and artificial) demo of the problem I'm running into, featuring my latest attempt at this. The idea here is to use __getattr__ to trap any attempt to invoke a nonexistent method, have it return a generic handler called _auto which creates the new method dynamically, invokes it, and installs it in the class, so that subsequent calls to the same method go directly to the newly created method, instead of to __getattr__. It is this last step, the installation of the new method, that is giving me problems. class A( object ): def __getattr__( self, name ): self._auto_name = name return self._auto def hello( self, name ): print hi! my name is %s % name def _auto( self, *args ): name = self._auto_name def m( self, *args ): self.hello( name ) m( self, *args ) m = classmethod( m ) setattr( A, name, m ) x = A() x.foo() # ok x.foo() # bombs reload(test) hi! my name is foo Traceback (most recent call last): File stdin, line 1, in ? File test.py, line 19, in ? x.foo() File test.py, line 12, in m self.hello( name ) TypeError: unbound method hello() must be called with A instance as first argument (got str instance instead) I'm sure that the problem is with my naive attempt to add a method to class A dynamically (in the last two lines of the definition of _auto). What's the right way to do this? Thanks! kj -- NOTE: In my address everything before the first period is backwards; and the last period, and everything after it, should be discarded. -- NOTE: In my address everything before the first period is backwards; and the last period, and everything after it, should be discarded. -- http://mail.python.org/mailman/listinfo/python-list
Re: How to hide a program?
jvdb wrote: Hi all, I've created a program that receives files and opens the corresponding program (for example adobe acrobat). However, when started, i would like to see nothing of the running program. I only want to see the program that will be opened. Is it possible to start a program 'hidden' or minimized to at least the system tray? And, if yes., could some one help me on this? I'm not exactly sure what you mean here, but I guess you want the command-window suppressed. You can do so by naming your scripts *.pyw, which will invoke pythonw.exe instead. That has no command-window. Diez -- http://mail.python.org/mailman/listinfo/python-list
Re: HTMLParser.HTMLParseError: EOF in middle of construct
Rob Wolfe wrote:
Sérgio Monteiro Basto wrote:
Stefan Behnel wrote:
Sérgio Monteiro Basto wrote:
but is one single error that blocks this.
Finally I found it , it is :
td colspan=2align=center
if I put :
td colspan=2 align=center
p = re.compile('align')
content = p.sub(' align', content)
I can parse the html
I don't know if it a bug of HTMLParser
Sure, and next time your key doesn't open your neighbours house, please
report to the building company to have them fix the door.
The question, here, is if
td colspan=2align=center
is valid HTML or not ?
I think is valid , if so it's a bug on HTMLParser
According to the HTML 4.01 specification this is *not valid* HTML.
Elements may have associated properties, called attributes, which may
have values
(by default, or set by authors or scripts). Attribute/value pairs
appear before the final
of an element's start tag. Any number of (legal) attribute value
pairs, separated
by spaces, may appear in an element's start tag.
if not, we still have a very bad message error (EOF in middle of
construct !?)
HTMLParser can deal with some errors e.g. lack of ending tags,
but it can't handle many other problems.
I have to use HTMLParser because I want use only python 2.4 standard , I
have to install the scripts in many machines.
And I have to parse many different sites, I just want extract the links,
so with a clean up before parse solve very quickly my problem.
In Python 2.4 you have to use some third party module. There is no
other option for _invalid_ HTML. IMHO BeautifulSoup is the best among
them.
Many thanks Rob , you have been clear has water thanks,
--
HTH,
Rob
--
Best regards,
--
Sérgio M. B.
--
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Re: Controlling Firefox with Python
On Jun 19, 4:35 pm, Méta-MCI [EMAIL PROTECTED] wrote: Hi! See Mozlab: http://dev.hyperstruct.net/mozlab and give a report, please. Thank you in advance. Michel Claveau There seems to be some kind of weird bug with the current version of MozLab. When I use telnet on my Windows XP box, it tries to evaluate every character I type, which only results in lots of syntax errors. I tried Putty in raw mode, and it works, but not well. Each line doesn't get output to the far left. Instead, each line is dropped down one line and tabbed over so it's one character ahead of the previous line. I assume you think I can use Python to telnet to a running MozLab to execute my commands? I will need to be able to do this to all the users on a network and installing extensions on everyone's PC will be somewhat difficult. Mike -- http://mail.python.org/mailman/listinfo/python-list
Re: DFW Pythoneers Meeting THIS Saturday
In article [EMAIL PROTECTED], Diez B. Roggisch [EMAIL PROTECTED] wrote: Joe Riopel wrote: Precisely what? You complained that the OP didn't provide the location of the event, which he did. Well, where is DFW? Google, first hit: The Dallas Ft. Worth Pythoneers They even have their own website. So - what's the fuss about? The BayPIGgies also announce their meetings here. I don't mind, even though Berlin is about 10-12 hours away on a jet-plane. . . . The upset surprises me, too. I appreciate people who esteem Usenet enough to help police specific newsgroups, discouraging traffic in marginal content best handled elsewhere. On the other hand, comp.lang.python has a tradition of productive announcements of local events, DFW is both *very* meaningful to the target audience, and, as noted, 'bout as easy to decipher with the help of Google as anything can be. Beyond all that, there's particular value in announcements like this because they *are* of regional, rather than local, significance. By that I mean I know of several cases where Pythoneers from somewhere else in the US (or even, in a couple of cases, other countries) have been traveling, and found it possible to schedule a visit with a local interest group. That's neat! Dallas gets a lot of traffic because it's an airline hub, and close moreover to fellow computing-industry centers in Austin and Houston (and, to a lesser extent, San Antonio and El Paso). -- http://mail.python.org/mailman/listinfo/python-list
Re: wxPython - embed separate script in panel?
On Jun 19, 7:28 pm, [EMAIL PROTECTED] wrote: This is a wxPython question.. the wxPython group is pretty much inactive. I have an MDI parent frame and child frame set up. In the child frame, I want to use part of the frame to display the output from a .py that is mainly matplotlib (a graph) in a section of the frame. How can I get it to automatically run that script and place the resultant graph in a panel? Thanks I'm not sure what you're talking about. I get a digest email from the wxPython user's group at least twice a day. Try going here and posting to it: http://www.wxpython.org/maillist.php Are you signed up to the dev group or something? Mike -- http://mail.python.org/mailman/listinfo/python-list
Re: caseless dictionary howto ?
Carsten Haese wrote: On Wed, 2007-06-20 at 11:14 +0200, stef wrote: Stefan Behnel wrote: Serial_HW_Read = the name of a function F = the type of that function (procedure / function / pseudo variable / interrupt /..) ++ = the direction of each parameters, (input / output / input+output ) T = a tupple, containing the type of each of the parameters (bit / byte/ sbyte / word / ...) maybe a class to hold them would look better), maybe, but no human is looking at it ;-) But humans might look at the code that looks at the thing. thing.func_type is self-documenting, thing[0] is not. I think you might be right, but for a one-time/one-programmer program, I think the documentation will be good enough. cheers, Stef Mientki -- http://mail.python.org/mailman/listinfo/python-list
SIGSEGV gcmodule.c:241 closing python after module import
Hi, I have a python extension that works fine while it is running, but when I exit python I get this error: GNU gdb Red Hat Linux (6.5-15.fc6rh) Copyright (C) 2006 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type show copying to see the conditions. There is absolutely no warranty for GDB. Type show warranty for details. This GDB was configured as i386-redhat-linux-gnu...Using host libthread_db library /lib/libthread_db.so.1. (gdb) run Starting program: python2.4 ... ctrl-d Program received signal SIGSEGV, Segmentation fault. [Switching to Thread -1208243504 (LWP 12884)] collect (generation=2) at Modules/gcmodule.c:241 241 Modules/gcmodule.c: No such file or directory. in Modules/gcmodule.c (gdb) bt #0 collect (generation=2) at Modules/gcmodule.c:241 #1 0x080e1ec5 in PyGC_Collect () at Modules/gcmodule.c:1196 #2 0x080da88a in Py_Finalize () at Python/pythonrun.c:353 #3 0x08055176 in Py_Main (argc=0, argv=0xbfb8dae4) at Modules/main.c: 513 #4 0x08054962 in main (argc=-1208273400, argv=0x812ed68) at Modules/python.c:23 I haven't figured out what it is trying to collect. Is there a way to tell? Thanks, Sean -- http://mail.python.org/mailman/listinfo/python-list
python website
hi, what are you list of favorite python website (news, articles, tutorials)? cheers, james -- http://mail.python.org/mailman/listinfo/python-list
Re: How to hide a program?
On 20 jun, 15:59, Diez B. Roggisch [EMAIL PROTECTED] wrote: jvdb wrote: Hi all, I've created a program that receives files and opens the corresponding program (for example adobe acrobat). However, when started, i would like to see nothing of the running program. I only want to see the program that will be opened. Is it possible to start a program 'hidden' or minimized to at least the system tray? And, if yes., could some one help me on this? I'm not exactly sure what you mean here, but I guess you want the command-window suppressed. You can do so by naming your scripts *.pyw, which will invoke pythonw.exe instead. That has no command-window. Diez Hi Diez, I forgot to mention that i have created a Windows executable of the script. What i want is to run the application minimized in the system tray or totally hidden. regards, Jeroen -- http://mail.python.org/mailman/listinfo/python-list
Re: The Modernization of Emacs
[Kaldrenon [EMAIL PROTECTED]] | Just so everyone's clear: | | Nothing he has said makes much sense, if any. (it'd be good if you explicitly specify who he is since pronouns by nature are extremely context sensitive, and in this context an unattentive reader might think you are referring to me. thanks :-). | Emacs' uniqueness may hurt its adoption rate, but it still has plenty | of users, who are all perfectly happy with how things are done. I don't see popularity as a goal in itself. I am selfish. I only care what the software can do for me and I think that this is the only way to write good software: make something you'd want to use yourself. -Bjørn -- http://mail.python.org/mailman/listinfo/python-list
class attributes data attributes
hi everyone, I am now in chapter 5 of Dive Into Python and I have some question about it. From what I understand in the book is you define class attributes data attributes like this in python class Book: total # is a class attribute def __init__(self): self.title # is a data attributes self.author # another data attributes To define class attributes is like defining a function in class, to define a data attributes is defining a variable inside the __init__ method. what makes me confuse is this model from Django from django.db import models class Person(models.Model): first_name = models.CharField(maxlength=30) last_name = models.CharField(maxlength=30) I believe the first_name and last_name are data attributes? but why it is they look like a class attributes as being define. Thanks in advance for explaining james -- http://mail.python.org/mailman/listinfo/python-list
Re: python website
On Jun 20, 9:22 am, james_027 [EMAIL PROTECTED] wrote: hi, what are you list of favorite python website (news, articles, tutorials)? cheers, james wxPython.org (and the wxPython wiki) Python.org ActiveState - http://aspn.activestate.com/ASPN/Python/Cookbook/ Charming python series - http://www.ibm.com/developerworks/library/l-pycon.html http://gnosis.cx/publish/tech_index_cp.html Devshed - http://www.devshed.com/c/b/Python/ Mike -- http://mail.python.org/mailman/listinfo/python-list
Re: stftime %z time conversion character
Evan Klitzke wrote: Although it is not present in ANSI C, the GNU version of stftime supports the conversion character %z, which is a time offset from GMT. The four digit time offset is required in RFC 2822 dates/times, and is used by a number of other programs as well. I need to convert times that use this convention to python time representations, and because Python does not support the %z time conversion character I cannot simply use the time.strptime function. What solutions have people used for this? I'm currently thinking of creating a dict that maps four digit time offsets to the time zone name and then use the %Z token on that. Is there another (or better) way? I had a similar problem, currently I had solved with a system call #The Linux Date Command: TZ=WET date -d 20070823 +%:z #example timezone = WET year = 2007 month = 2 day = 27 #end of example cmd=TZ=%s /bin/date -d %.4d%.2d%.2d +%%z % (timezone,year,month,day) print DEBUG cmd=%s % cmd handler=os.popen(cmd, 'r', 1) output = .join(handler.readlines()).strip() tz=output[:3]+:+output[3:] handler.close() print DEBUG timezone=%sXX % tz before I test timezone of my machines like this : import time tzstr=time.strftime(%Z,time.localtime()) if tzstr == WEST : do something Hope that can help something Best regards, -- Sérgio M. B. -- http://mail.python.org/mailman/listinfo/python-list
Re: python website
The Daily Python-URL http://www.pythonware.com/daily/ -- http://mail.python.org/mailman/listinfo/python-list
Re: SimplePrograms challenge
Steve Howell [EMAIL PROTECTED] writes: Feel free to change the page as you see fit, although thanks for discussing it here first. Done. I've moved classes up as unittest depends on it. The changes that I made to classes were: 1) Use new style class. 2) Demonstrate Pythonic use of attribute (no get/set). 3) Pare some lines. -- Pete Forman-./\.- Disclaimer: This post is originated WesternGeco -./\.- by myself and does not represent [EMAIL PROTECTED]-./\.- the opinion of Schlumberger or http://petef.port5.com -./\.- WesternGeco. -- http://mail.python.org/mailman/listinfo/python-list
Re: Transfer file name input from one .py to another
[EMAIL PROTECTED] wrote: How do I transfer the file name which is input in one .py (an MDI parent frame in wxPython) to another .py (an MDI child frame)? The parent gets the file name from the user via a file select dialog, but the child frame is the one that needs to know what file it is working with. Thanks Normally I do something like: class childFrame: def __init__(self, parent, *args): self.parent=parent # # Now you can refer to the filename by accessing # self.parent.filenamefromdialog class main: def getfilefromdialog(self): self.filenamefromdialog=... -Larry -- http://mail.python.org/mailman/listinfo/python-list
Re: class attributes data attributes
james_027 wrote: hi everyone, I am now in chapter 5 of Dive Into Python and I have some question about it. From what I understand in the book is you define class attributes data attributes like this in python class Book: total # is a class attribute def __init__(self): self.title # is a data attributes self.author # another data attributes To define class attributes is like defining a function in class, to define a data attributes is defining a variable inside the __init__ method. what makes me confuse is this model from Django from django.db import models class Person(models.Model): first_name = models.CharField(maxlength=30) last_name = models.CharField(maxlength=30) I believe the first_name and last_name are data attributes? but why it is they look like a class attributes as being define. First of all, the common term for what you call a data attribute is is instance attribute. Furthermore - you're right and wrong. The django-code above defines a model class, which has some class-attributes declaring the fields the database shall have. and the instances as well! So while the above clearly are class attributes, the ORM runtime of django will create instances of that class that have instance attributes of the same name. Something along these lines (albeit a contrived example): class Foo(object): bar = baz def __init__(self): for name, value in self.__class__.__dict__.items(): if isinstance(value, str): setattr(self, name, some other value) f = Foo() print f.bar Which should result in some other value. But it's untested code above. Diez -- http://mail.python.org/mailman/listinfo/python-list
Re: How to hide a program?
jvdb wrote: Hi all, I've created a program that receives files and opens the corresponding program (for example adobe acrobat). However, when started, i would like to see nothing of the running program. I only want to see the program that will be opened. Is it possible to start a program 'hidden' or minimized to at least the system tray? And, if yes., could some one help me on this? Thanks already! Jeroen You can do this with: import win32process STARTUPINFO=win32process.STARTUPINFO() STARTUPINFO.dwX=0 STARTUPINFO.dwY=0 STARTUPINFO.dwXSize=800 STARTUPINFO.dwYSize=600 execute_target=enter program to run here commandLine=None processAttributes=None threadAttributes=None bInheritHandles=0 dwCreationFlags=0 currentDirectory=None # # Start the program # win32process.CreateProcess(execute_target, commandLine, processAttributes, threadAttributes, bInheritHandles, dwCreationFlags, newEnvironment, currentDirectory, STARTUPINFO) -Larry Bates -- http://mail.python.org/mailman/listinfo/python-list
business on line follow me !
hello: madam and sir . we sell all kinds of laptops and digital cam .our product is a quantity best, the price is the lowest in the world, i think you will be interested in our product . thanks a lot! Our Website:http://www.prs-123.com/ Msn: [EMAIL PROTECTED] mail: [EMAIL PROTECTED] thanks for everyone good luck with everyone . @@@ hello : madam and sir. we sell all kinds of laptops and digital cam .our product is a quantity best, the price is the lowest in the world, i think you will be interested in our product . thanks a lot! Our Website:http:// www.prs-123.com/ Msn: [EMAIL PROTECTED] mail: [EMAIL PROTECTED] thanks for everyone good luck with everyone @ hello: madam and sir . we sell all kinds of laptops and digital cam .our product is a quantity best, the price is the lowest in the world, i think you will be interested in our product . thanks a lot! Our Website:http:// www.prs-123.com/ Msn: [EMAIL PROTECTED] mail: [EMAIL PROTECTED] thanks for everyone good luck with everyone . @@@ hello : madam and sir. we sell all kinds of laptops and digital cam .our product is a quantity best, the price is the lowest in the world, i think you will be interested in our product . thanks a lot! Our Website:http:// www.prs-123.com/ Msn: [EMAIL PROTECTED] mail: [EMAIL PROTECTED] thanks for everyone good luck with everyone hello: madam and sir . we sell all kinds of laptops and digital cam .our product is a quantity best, the price is the lowest in the world, i think you will be interested in our product . thanks a lot! Our Website:http://www.prs-123.com/ Msn: [EMAIL PROTECTED] mail: [EMAIL PROTECTED] thanks for everyone good luck with everyone . @@@ hello : madam and sir. we sell all kinds of laptops and digital cam .our product is a quantity best, the price is the lowest in the world, i think you will be interested in our product . thanks a lot! Our Website:http:// www.prs-123.com/ Msn: [EMAIL PROTECTED] mail: [EMAIL PROTECTED] thanks for everyone good luck with everyone @ hello: madam and sir . we sell all kinds of laptops and digital cam .our product is a quantity best, the price is the lowest in the world, i think you will be interested in our product . thanks a lot! Our Website:http:// www.prs-123.com/ Msn: [EMAIL PROTECTED] mail: [EMAIL PROTECTED] thanks for everyone good luck with everyone . @@@ hello : madam and sir. we sell all kinds of laptops and digital cam .our product is a quantity best, the price is the lowest in the world, i think you will be interested in our product . thanks a lot! Our Website:http:// www.prs-123.com/ Msn: [EMAIL PROTECTED] mail: [EMAIL PROTECTED] thanks for everyone good luck with everyone hello: madam and sir . we sell all kinds of laptops and digital cam .our product is a quantity best, the price is the lowest in the world, i think you will be interested in our product . thanks a lot! Our Website:http://www.prs-123.com/ Msn: [EMAIL PROTECTED] mail: [EMAIL PROTECTED] thanks for everyone good luck with everyone . @@@ hello : madam and sir. we sell all kinds of laptops and digital cam .our product is a quantity best, the price is the lowest in the world, i think you will be interested in our product . thanks a lot! Our Website:http:// www.prs-123.com/ Msn: [EMAIL PROTECTED] mail: [EMAIL PROTECTED] thanks for everyone good luck with everyone @ hello: madam and sir . we sell all kinds of laptops and digital cam .our product is a quantity best, the price is the lowest in the world, i think you will be interested in our product . thanks a lot! Our Website:http:// www.prs-123.com/ Msn: [EMAIL PROTECTED] mail: [EMAIL PROTECTED] thanks for everyone good luck with everyone . @@@ hello : madam and sir. we sell all kinds of laptops and digital cam .our product is a quantity best, the price is the lowest in the world, i think you will be interested in our product . thanks a lot! Our Website:http:// www.prs-123.com/ Msn: [EMAIL PROTECTED] mail: [EMAIL PROTECTED] thanks for everyone good luck with everyone hello: madam and sir . we sell all kinds of laptops and digital cam .our product is a quantity best, the price is the lowest in the world, i think you will be interested in our product . thanks a lot! Our Website:http://www.prs-123.com/ Msn: [EMAIL PROTECTED] mail: [EMAIL PROTECTED] thanks for everyone good luck with everyone . @@@ hello : madam and sir. we sell all kinds of laptops and digital cam .our product is a quantity best, the price is the lowest in the world, i think you will be interested in our product . thanks a lot! Our Website:http:// www.prs-123.com/ Msn: [EMAIL PROTECTED] mail: [EMAIL
Re: class attributes data attributes
james_027 a écrit : hi everyone, I am now in chapter 5 of Dive Into Python and I have some question about it. From what I understand in the book is you define class attributes data attributes like this in python s/data/instance/ class Book: total # is a class attribute def __init__(self): self.title # is a data attributes self.author # another data attributes To define class attributes is like defining a function in class, to define a data attributes is defining a variable inside the __init__ method. what makes me confuse is this model from Django from django.db import models class Person(models.Model): first_name = models.CharField(maxlength=30) last_name = models.CharField(maxlength=30) I believe the first_name and last_name are data attributes? but why it is they look like a class attributes as being define. first_name and last_name are actually class attributes. AFAICT, they are descriptors[1] controlling access to the resultset returned by the db query. [1] cf the doc for the descriptor protocol on python.org. This is the feature that - amongst other things - allow Python to have a support for 'computed attributes' (aka properties). HTH -- http://mail.python.org/mailman/listinfo/python-list
Re: static python classes ?
Neil Cerutti [EMAIL PROTECTED] wrote:
In C++ they are used most often for factory functions, since they
conveniently have access to the class's private members, and
don't want or need an existing instance. Python seems to have
adopted this use-case (ConfigParser, for example), but without a
need for it (code organization?).
What staticmethod does ConfigParser have? Can't recall one offhand.
I think Python more commonly uses classmethod, rather than staticmethod,
for factories (i.e. a la Smalltalk, not a la C++). In that case the
advantage wrt a function _is_ there: when you subclass, you can get
instances of the new class, rather than the base class, from the
factory:
class zap(dict): pass
...
z = zap.fromkeys(range(4))
z
{0: None, 1: None, 2: None, 3: None}
type(z)
class '__main__.zap'
If dict_fromkeys was a plain function (or if fromkeys was a staticmethod
rather than a classmethod of dict) then z would be an instance of dict,
rather than one of zap (unless you also specifically passed the desired
class, kind of cumbersome).
Alex
--
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Python live environment on web-site?
Hi all, I was wondering if there was a python-live-environment available on a public web-site similar to the ruby-live-tutorial on http://tryruby.hobix.com/ I would prefer something which allows to paste small scripts into a text-field, to run them on the server, and to be able to read the produced output of the script. I searched using google but didn't come across such a site. However, I imagine there must be at least one Thanks for any hint, Thomas -- http://mail.python.org/mailman/listinfo/python-list
ebay
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Re: How to hide a program?
On 20 jun, 17:05, Larry Bates [EMAIL PROTECTED] wrote: jvdb wrote: Hi all, I've created a program that receives files and opens the corresponding program (for example adobe acrobat). However, when started, i would like to see nothing of the running program. I only want to see the program that will be opened. Is it possible to start a program 'hidden' or minimized to at least the system tray? And, if yes., could some one help me on this? Thanks already! Jeroen You can do this with: import win32process STARTUPINFO=win32process.STARTUPINFO() STARTUPINFO.dwX=0 STARTUPINFO.dwY=0 STARTUPINFO.dwXSize=800 STARTUPINFO.dwYSize=600 execute_target=enter program to run here commandLine=None processAttributes=None threadAttributes=None bInheritHandles=0 dwCreationFlags=0 currentDirectory=None # # Start the program # win32process.CreateProcess(execute_target, commandLine, processAttributes, threadAttributes, bInheritHandles, dwCreationFlags, newEnvironment, currentDirectory, STARTUPINFO) -Larry Bates Hi Larry, The thing is, i don't want to see anything of my program, just the launched program. I already have the program working. But when i create an executable of it with py2exe and start it, i don't want to see that it is running, perhaps just in the systemtray. That is my problem. thanks! Jeroen -- http://mail.python.org/mailman/listinfo/python-list
RE: DFW Pythoneers Meeting THIS Saturday
Short answer: DFW = Dallas-Fort Worth Longer answer: I'm not pointing fingers or making opinions, I just wanted to point out that after reading Jeff's original email (in its entirity), I found: Jeff wrote: snip at the usual location of Nerdbooks.com bookstore in Richardson. For /snip So, after looking at Nerdbooks.com, they're in Richardson, TX. http://maps.google.com/maps?f=qhl=enq=1681+Firman+Drive,+richardson,+t xsll=37.0625,-95.677071sspn=31.371289,59.765625ie=UTF8ll=32.876127,- 96.792297spn=0.259504,0.466919z=11om=1 snip By the way, I've been contacted by a developer at the Travelocity Dallas office, who is looking for local Python developers with experience in Django or Genshi. If you're interested, let me know and I can put you in touch. /snip Otherwise, after reading to this point in his email (and not knowing what DFW was), I'd guess that they're near Dallas. -Original Message- Subject: Re: DFW Pythoneers Meeting THIS Saturday Precisely what? You complained that the OP didn't provide the location of the event, which he did. Well, where is DFW? -- -- http://mail.python.org/mailman/listinfo/python-list
subprocess.popen question
I am trying to modify a programming example and I am coming up with two problems... first is that I can't seem to pass along the arguments to the external command (I have been able to do that with the old module and cmd is the command I wish to try) all the output seems to be returned as one line (at least when I run the program in spe). import subprocess from os import system cmd = gawk -f altertime.awk -v time_offset=4 -v outfile=testdat.sco i1.sco #subprocess.Popen. last_line = subprocess.Popen(['gawk.exe'], stdout=subprocess.PIPE).communicate()[0] xx = 0 for line in last_line: xx = xx + 1 if xx 2: print line print str(xx) -- http://mail.python.org/mailman/listinfo/python-list
Re: static python classes ?
On 2007-06-20, Alex Martelli [EMAIL PROTECTED] wrote:
Neil Cerutti [EMAIL PROTECTED] wrote:
In C++ they are used most often for factory functions, since they
conveniently have access to the class's private members, and
don't want or need an existing instance. Python seems to have
adopted this use-case (ConfigParser, for example), but without a
need for it (code organization?).
What staticmethod does ConfigParser have? Can't recall one
offhand.
I misremembered which module I had recently seen it in: it was
datetime, not ConfigParser. And ('datetime.today') is, as you
point out, a class method rather than a static method.
Thanks for the correction.
I think Python more commonly uses classmethod, rather than
staticmethod, for factories (i.e. a la Smalltalk, not a la
C++). In that case the advantage wrt a function _is_ there:
when you subclass, you can get instances of the new class,
rather than the base class, from the factory:
class zap(dict): pass
...
z = zap.fromkeys(range(4))
z
{0: None, 1: None, 2: None, 3: None}
type(z)
class '__main__.zap'
If dict_fromkeys was a plain function (or if fromkeys was a
staticmethod rather than a classmethod of dict) then z would be
an instance of dict, rather than one of zap (unless you also
specifically passed the desired class, kind of cumbersome).
Thanks. That makes much more sense than my misunderstanding did. ;)
--
Neil Cerutti
Ask about our plans for owning your home --sign at mortgage company
--
http://mail.python.org/mailman/listinfo/python-list
Edit Audio Using Python?
Hello Python Gurus, I picked up a book the other day on Python programming. Python rocks! I'm learning Python as I want to call upon it to handle some intensive tasks from PHP/web server. The top goal right now is automating audio editing using Python. Is it possible? I was able to do this directly through php, but it was rey slo. PHP is not designed for that sort of thing. So far I googled the Snack Sound Toolkit at http://www.speech.kth.se/snack/ . It seems to have potential, but is very limited, and has not been a very active project lately from what I can tell. I'm not sure I can use it without learning C or C++ to make it do what I want (fading ends, appending - there but not working?, mixing). It may work once I learn more about it. Do you know of any other modules, scripts, or whatnot that allows for fast .wav audio editing from a Python script (not through a visual interface)? Would it be better to start from scratch? Thank you much for the advise :) -- http://mail.python.org/mailman/listinfo/python-list
