Re: Python 3000 deat !? Is true division ever coming ?
Magnus Lycka wrote: Gregory Piñero wrote: I knew about that approach. I just wanted less typing :-( It's enough to introduce one float in the mix. 1.*a/b or float(a)/b if you don't want one more multiplication. That doesn't work if either a or b is a Decimal. What *could* work is def is_integer(num): return isinstance(num, (int, long)) def divide(a, b): if is_integer(a) and is_integer(b): return 1.0 * a / b else: return a / b But why bother when you could just put from __future__ import division at the top of the file? -- http://mail.python.org/mailman/listinfo/python-list
Re: Does Plone support distinct sets of users in subgroups?
wheel: I'm not sure if this is the right venue for Plone questions, if not, could someone ref me to a better one? The plone-users mailing list. Highly recommended. The discussion groups on the plone site are mailing lists and I'd rather not subscribe quite yet. Why not? It's free, takes 1 minute and you can unsubscribe at any time. Does plone support distinct sets of users? Yes. There's a user-group mechanism. http://plone.org/documentation/tutorial/understanding-permissions/tutorial-all-pages That is, on a public website running plone, can it be configured such that when a user logs in they are allowed access to a subgroup's main page, That can be done with local roles on the sharing tab. See the link above. get the subgroup's newsletter as well as the main site's newsletter etc? I'm not sure about that. I guess it depends on how you implement the newsletter. It may require a little customization or programming. -- René Pijlman -- http://mail.python.org/mailman/listinfo/python-list
Re: How many web framework for python ?
Bo Yang: There are very good web framework for java and ruby , Is there one for python ? Yes. http://wiki.python.org/moin/WebProgramming I want to write a web framework for python based on mod_python as my course homework , could you give some advise ? Write Zope3. -- René Pijlman -- http://mail.python.org/mailman/listinfo/python-list
jython socket sendall
Hi there, I am about to port a server application from Java to Jython. For the socket part I found some examples written in Python. I have problems to figure out the socket part of the application. In Jython 2.1 the sendall function is missing? def establishConnection(self): self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM) print type(self.host), repr(self.host) print type(self.port), repr(self.port) self.socket.connect((self.host, self.port)) #self.socketOutput = self.socket.getOutputStream() self.socketOutput = self.socket #self.socketReader = StreamReader(self.socket.getInputStream()) self.socketReader = self.socket bytes = self.makeHttpRequest().encode(UTF-8) print type(bytes), repr(bytes) self.socketOutput.sendall(bytes) #self.socketOutput.flush() sys.stdout.write(http request sent\n) -Mark -- http://mail.python.org/mailman/listinfo/python-list
Re: How many web framework for python ?
Bo Yang wrote: There are very good web framework for java and ruby , Is there one for python ? There are many good ones. I want to write a web framework for python based on mod_python as my course homework , could you give some advise ? Implement yet another web framework? It needs to be made harder so people can stop doing it all the time. ;-) You might want to watch the 20 min turbogears video for a laid back approach of familiarizing yourself with a python web framework: http://www.turbogears.org/docs/wiki20/20MinuteWiki.mov -- http://mail.python.org/mailman/listinfo/python-list
Re: embedding python in HTML
bruno at modulix wrote: John Salerno wrote: Rene Pijlman wrote: John Salerno: [Python alternative for PHP] So to do this with Python, do I simply integrate it into the HTML as above, with no extra steps? You'd need something like the PHP engine, that understands Python rather than PHP. My web server can run Python, fortunately. Now that they've turned it on for me, I wanted to try it out, but I didn't know how to go about writing a bit of code to stick into an HTML file. You've got to understand that Python is *not* a 'ServerPage' language (- php, asp, jsp etc) in itself. Your server can now run python, fine, but *how* ? CGI ? FastCGI ? mod_python ? other ? (hint: it's probably just plain old CGI...) It's not an Active Scripting language by default after installation of the win32all extensions, but it can be made one, giving it access to Request, Response and the other usual suspects in the ASP environment. This wouldn't be my preferred way to use it, but (for example) it allows you to include Python sources in VBScript pages and have your VBScript code call Python functions and procedures. This alone is sometimes worthwhile. regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC www.holdenweb.com PyCon TX 2006 www.python.org/pycon/ -- http://mail.python.org/mailman/listinfo/python-list
Re: python spawn new process, rout stdin/out
kmkz wrote: ok solved that by using the call() method I now have a bigger problem: the executable always wants to open in its own window. how do I stop this? Call pythonw instead of python. regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC www.holdenweb.com PyCon TX 2006 www.python.org/pycon/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Does Plone support distinct sets of users in subgroups?
wheel wrote: I'm not sure if this is the right venue for Plone questions, if not, could someone ref me to a better one? The discussion groups on the plone site are mailing lists and I'd rather not subscribe quite yet. Use gmane.org: you get NNTP access to all the plone mailing lists (and several thousand others) and it will subscribe you automatically under its own email address if you choose to post (you have to respond to a confirmation email from gmane before first time you post to each newsgroup). http://dir.gmane.org/index.php?prefix=gmane.comp.web.zope.plone -- http://mail.python.org/mailman/listinfo/python-list
Re: GDI in python?
al pacino wrote: hi, is it possible to address the 'screen pixels' using python , like analogous to older dos( functions that graphics.h provides') or win api calls for gdi. what i want is to display clusters (in differetn colours) on screen using python. thanks. Sure. The problem will be to choose the right tool from the myriads of available ones. I have some experience with PyGame http://www.pygame.org/news.html which is built on top of SDL http://www.libsdl.org/index.php and find it easy to understand and use. Don't be fooled by the 'Game' part - PyGame is as useful as SDL (a very good library). Claudio -- http://mail.python.org/mailman/listinfo/python-list
Re: GDI in python?
al pacino schrieb: hi, is it possible to address the 'screen pixels' using python , like analogous to older dos( functions that graphics.h provides') or win api calls for gdi. Use one of the available GUI-Toolkits - Tkinter is included already. Or pygame. Diez -- http://mail.python.org/mailman/listinfo/python-list
Re: commenting out blocks of code
Steven D'Aprano wrote: Scite, for example, lets me selected a block and hit Ctrl-Q to either comment or uncomment the block. I see the developers of Scite are either newbies to GUI programming, or they operate in a world of their own. Ctrl-Q is reserved for Quit (or Exit) in every GUI API I know of. Your experience obviously differs from mine. I just tried Ctrl-Q on both windows and ubuntu and in neither case did it exit applications consistently: For example Firefox uses Alt-F4 in both cases. My own favourite editor (Epsilon) uses Ctrl-Q for the 'quoted-insert' command (hardly suprising given its similarity to emacs). (It does this by prefixing each line with #~ instead of just #, which allows it to detect when a line is already so commented and reverse the operation.) It is *easy* to detect when a line is already commented. It starts with a #. The ~ is superfluous. Not so easy if the lines to be commented already contain some lines starting with comments. Messing around with the comments themselves sounds highly unsatisfactory though. I agree with you that the best solution is to use different commands (or as Epsilon does a single command which can be modified with a prefix Ctrl-U). That way I can select a large region and comment it all out, or uncomment disjoint parts of it as I choose. -- http://mail.python.org/mailman/listinfo/python-list
Re: embedding python in HTML
Rene Pijlman wrote: There's also PSP: http://www.ciobriefings.com/psp/ Another incarnation of PSP can be used as part of Webware for Python (http://www.w4py.org). And one of the more modern solutions that should be mentioned is Kid (http://kid.lesscode.org). -- Christoph -- http://mail.python.org/mailman/listinfo/python-list
[ANN] Movable python Trial Version
Hot on the heels of `Movable Python 1.0.1 http://www.voidspace.org.uk/python/movpy/`_, is the release of a free trial version of **Movable Python**. This is the full distribution for Python 2.3.5. To download (and play with it), visit `Movable python Demo http://www.tradebit.com/filedetail.php/734815`_. You can obtain the full version from the `Groups Page http://voidspace.tradebit.com/groups.php`_. It is set to expire on the 22nd May, and displays a nag screen on startup. Other than that, it is the full version. Have fun. Fuzzyman http://www.voidspace.org.uk/python/index.shtml -- http://mail.python.org/mailman/listinfo/python-list
Photo Management Python Application
Does anyone know of a Python program that will re-name digital photo files in a date-time format based on the date stamp of the file? -- http://mail.python.org/mailman/listinfo/python-list
Should we still be learning this?
On monday I start a semester course in Python (the alternative was Java). I was looking through the course outline and noticed the following: 1) UserDict is used. This is deprecated, right? 2) There is no mention of list comprehensions, but map and filter are taught early and then revisited later. I don't think this is good: list comprehensions are, IMO, one of Python's great features, Psyco prefers them, they're more pythonic, and map and filter seem to be going out the window for Python 3000. What do you think? --Max -- http://mail.python.org/mailman/listinfo/python-list
Re: [ANN] Movable python Trial Version
Em Sáb, 2006-02-18 às 04:24 -0800, Fuzzyman escreveu: It is set to expire on the 22nd May, and displays a nag screen on startup. Other than that, it is the full version. Have fun. Attached is the cracked version with no expiration limit and my own bitmap on the startup. Enjoy! Fuzzyman http://www.voidspace.org.uk/python/index.shtml Just kidding ;-), Felipe. -- Quem excele em empregar a força militar subjulga os exércitos dos outros povos sem travar batalha, toma cidades fortificadas dos outros povos sem as atacar e destrói os estados dos outros povos sem lutas prolongadas. Deve lutar sob o Céu com o propósito primordial da 'preservação'. Desse modo suas armas não se embotarão, e os ganhos poderão ser preservados. Essa é a estratégia para planejar ofensivas. -- Sun Tzu, em A arte da guerra -- http://mail.python.org/mailman/listinfo/python-list
Re: Should we still be learning this?
Em Sáb, 2006-02-18 às 14:38 +0200, Max escreveu: On monday I start a semester course in Python (the alternative was Java). I was looking through the course outline and noticed the following: 1) UserDict is used. This is deprecated, right? LOL... it's the first time I see someone talking about this module. /me checks the documentation. Yep, looks like this module is deprecated since Python 2.2. 2) There is no mention of list comprehensions, but map and filter are taught early and then revisited later. I don't think this is good: list comprehensions are, IMO, one of Python's great features, Psyco prefers them, they're more pythonic, and map and filter seem to be going out the window for Python 3000. Urgh. This sucks. Did they mention generators, at least? Sometimes list comprehensions are even faster (I didn't check, but I think this one can be an example of this: [i*2+2 for i in iterator] vs. map(lambda x: x*2 +2, iterator)). They should have taught both. What do you think? I wonder if they need some updating. --Max Just my two cents, Felipe. -- Quem excele em empregar a força militar subjulga os exércitos dos outros povos sem travar batalha, toma cidades fortificadas dos outros povos sem as atacar e destrói os estados dos outros povos sem lutas prolongadas. Deve lutar sob o Céu com o propósito primordial da 'preservação'. Desse modo suas armas não se embotarão, e os ganhos poderão ser preservados. Essa é a estratégia para planejar ofensivas. -- Sun Tzu, em A arte da guerra -- http://mail.python.org/mailman/listinfo/python-list
strange error I can't figure out...
Hello, I have an odd kind of Heisenbug in what looks like a pretty simple program. The program is a progress bar code I got at the Python Cookbook: http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/168639 (including the code below) If you uncomment the one print statement I added in the progressBar class, you get the error: File test_progress2.py, line 19 diffFromMin = float(self.amount - self.min) ^ SyntaxError: invalid syntax yet, without the print statement, it works fine. what am I overlooking here? thanks, bb # class progressBar: def __init__(self, minValue = 0, maxValue = 10, totalWidth=12): self.progBar = [] # This holds the progress bar string self.min = minValue self.max = maxValue self.span = maxValue - minValue self.width = totalWidth self.amount = 0 # When amount == max, we are 100% done self.updateAmount(0) # Build progress bar string def updateAmount(self, newAmount = 0): if newAmount self.min: newAmount = self.min if newAmount self.max: newAmount = self.max self.amount = newAmount #print hello #-- uncomment line to break # Figure out the new percent done, round to an integer diffFromMin = float(self.amount - self.min) percentDone = (diffFromMin / float(self.span)) * 100.0 percentDone = round(percentDone) percentDone = int(percentDone) # Figure out how many hash bars the percentage should be allFull = self.width - 2 numHashes = (percentDone / 100.0) * allFull numHashes = int(round(numHashes)) # build a progress bar with hashes and spaces self.progBar = [ + '#'*numHashes + ' '*(allFull-numHashes) + ] # figure out where to put the percentage, roughly centered percentPlace = (len(self.progBar) / 2) - len(str(percentDone)) percentString = str(percentDone) + % # slice the percentage into the bar self.progBar = self.progBar[0:percentPlace] + percentString + self.progBar[percentPlace+len(percentString):] def __str__(self): return str(self.progBar) if __name__ == __main__: import time prog = progressBar(0, 100, 77) for i in xrange(101): prog.updateAmount(i) print prog, \r, time.sleep(.05) -- http://mail.python.org/mailman/listinfo/python-list
Re: strange error I can't figure out...
Is well indented ? -- http://mail.python.org/mailman/listinfo/python-list
Re: Should we still be learning this?
Felipe Almeida Lessa wrote: Em Sáb, 2006-02-18 às 14:38 +0200, Max escreveu: Urgh. This sucks. Did they mention generators, at least? Sometimes list comprehensions are even faster (I didn't check, but I think this one can be an example of this: [i*2+2 for i in iterator] vs. map(lambda x: x*2 +2, iterator)). No mention of generators in the outline. They should have taught both. What do you think? I wonder if they need some updating. And so does Dive Into Python (our textbook, diveintopython.org) which has the same deficiencies in its outline. Just my two cents, Felipe. Thanks, Max -- http://mail.python.org/mailman/listinfo/python-list
Re: Movable python Trial Version
Felipe Almeida Lessa wrote: Em Sáb, 2006-02-18 às 04:24 -0800, Fuzzyman escreveu: It is set to expire on the 22nd May, and displays a nag screen on startup. Other than that, it is the full version. Have fun. Attached is the cracked version with no expiration limit and my own bitmap on the startup. Enjoy! I'm sure it wouldn't be that hard to do. Seriously not worth the effort though. ;-) Fuzzy Fuzzyman http://www.voidspace.org.uk/python/index.shtml Just kidding ;-), Felipe. -- Quem excele em empregar a força militar subjulga os exércitos dos outros povos sem travar batalha, toma cidades fortificadas dos outros povos sem as atacar e destrói os estados dos outros povos sem lutas prolongadas. Deve lutar sob o Céu com o propósito primordial da 'preservação'. Desse modo suas armas não se embotarão, e os ganhos poderão ser preservados. Essa é a estratégia para planejar ofensivas. -- Sun Tzu, em A arte da guerra -- http://mail.python.org/mailman/listinfo/python-list
Re: strange error I can't figure out...
It works fine for me. You must be having an indentation problem. Also, get rid of the comma at the end of that last print statement. Brian Blais wrote: Hello, I have an odd kind of Heisenbug in what looks like a pretty simple program. The program is a progress bar code I got at the Python Cookbook: http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/168639 (including the code below) If you uncomment the one print statement I added in the progressBar class, you get the error: File test_progress2.py, line 19 diffFromMin = float(self.amount - self.min) ^ SyntaxError: invalid syntax yet, without the print statement, it works fine. what am I overlooking here? thanks, bb # class progressBar: def __init__(self, minValue = 0, maxValue = 10, totalWidth=12): self.progBar = [] # This holds the progress bar string self.min = minValue self.max = maxValue self.span = maxValue - minValue self.width = totalWidth self.amount = 0 # When amount == max, we are 100% done self.updateAmount(0) # Build progress bar string def updateAmount(self, newAmount = 0): if newAmount self.min: newAmount = self.min if newAmount self.max: newAmount = self.max self.amount = newAmount #print hello #-- uncomment line to break # Figure out the new percent done, round to an integer diffFromMin = float(self.amount - self.min) percentDone = (diffFromMin / float(self.span)) * 100.0 percentDone = round(percentDone) percentDone = int(percentDone) # Figure out how many hash bars the percentage should be allFull = self.width - 2 numHashes = (percentDone / 100.0) * allFull numHashes = int(round(numHashes)) # build a progress bar with hashes and spaces self.progBar = [ + '#'*numHashes + ' '*(allFull-numHashes) + ] # figure out where to put the percentage, roughly centered percentPlace = (len(self.progBar) / 2) - len(str(percentDone)) percentString = str(percentDone) + % # slice the percentage into the bar self.progBar = self.progBar[0:percentPlace] + percentString + self.progBar[percentPlace+len(percentString):] def __str__(self): return str(self.progBar) if __name__ == __main__: import time prog = progressBar(0, 100, 77) for i in xrange(101): prog.updateAmount(i) print prog, \r, time.sleep(.05) -- http://mail.python.org/mailman/listinfo/python-list
Re: [ANN] Movable python Trial Version
Felipe Almeida Lessa wrote: Em Sáb, 2006-02-18 às 04:24 -0800, Fuzzyman escreveu: It is set to expire on the 22nd May, and displays a nag screen on startup. Other than that, it is the full version. Have fun. Attached is the cracked version with no expiration limit and my own bitmap on the startup. Enjoy! Fuzzyman http://www.voidspace.org.uk/python/index.shtml Just kidding ;-), Felipe. To make it really funny, just beware from sending me the appropriate link to my personal email address ;-) . Claudio -- http://mail.python.org/mailman/listinfo/python-list
Re: GDI in python?
Le 17 Feb 2006 22:02:23 -0800, al pacino a écrit : hi, is it possible to address the 'screen pixels' using python , like analogous to older dos( functions that graphics.h provides') or win api calls for gdi. Some possibilities (all on Win32 only): ctypes by Thomas Heller venster (uses ctypes) on sourceforge win32all by Marc Hammond what i want is to display clusters (in differetn colours) on screen using python. thanks. -- http://mail.python.org/mailman/listinfo/python-list
Re: Should we still be learning this?
Don't overly concern yourself with your course being 100% up to date. When learning programming, the concepts are what is important, not the syntax or libraries you happen to be using. Even if they were to teach you the latest and greatest features of 2.4.2, that would be out of date in a few months/years when the next version comes along and the Python gods decide to deprecate the entire os module or something. Syntax and libraries change; just roll with it. When you are a student, the important thing is learning the mental skills of how to put it all together. When I was a wee lad, they taught me Pascal, a language that is now as dead as Latin, but I now realize that the language did not matter; all that mattered was that I learned the basics of how to design and put together a program in a (procedural) language. Once I knew that, it was a cinch to teach myself C in an afternoon, and only slightly tougher to learn C++ and then Java. Python is a good teaching language because by learning one language you learn three major programming paradigms: procedural, OO, and functional. It doesn't matter if, three years from now, a Dark Age descends upon the land and Python becomes as extinct as Pascal. If your course was decent, you spent your time learning programming, not just learning today's syntax and libraries, and you'll be able to learn Microsoft Visual C#++.Net.Com.Org or whatever other language happens to be fashionable in the future. And BTW, map and filter are such useful concepts that it makes sense to teach them to students even if they will one day be deprecated in Python. If you want to teach yourself Haskell or a Lisp dialect (and you should!), knowing those concepts will come in very handy. Max wrote: On monday I start a semester course in Python (the alternative was Java). I was looking through the course outline and noticed the following: 1) UserDict is used. This is deprecated, right? 2) There is no mention of list comprehensions, but map and filter are taught early and then revisited later. I don't think this is good: list comprehensions are, IMO, one of Python's great features, Psyco prefers them, they're more pythonic, and map and filter seem to be going out the window for Python 3000. What do you think? --Max -- http://mail.python.org/mailman/listinfo/python-list
Re: How many web framework for python ?
Thank you very much ! -- http://mail.python.org/mailman/listinfo/python-list
general coding issues - coding style...
Hi all, since I'm just a 'handicraft'/beginner or so, could anybody provide me with some (rough) hints, about how to enhance the code here: http://calmar.ws/tmp/cal.html Cheers and thanks a lot calmar -- calmar (o_ It rocks: LINUX + Command-Line-Interface //\ V_/_ http://www.calmar.ws -- http://mail.python.org/mailman/listinfo/python-list
Re: Activestate python installation
mik3 == mik3 [EMAIL PROTECTED] writes: mik3 hi this is a question regarding installing Activestate mik3 python whenever i try to install the latest Activestate mik3 Python on WinXP SP2, it gives me error saying The wizard mik3 was interrupted before Activestate 2.4.2 could be completely mik3 installed. Your system has not been modified . any mik3 ideas why this is going on? thanks Administrator? Writeable drive? Is there an install log file you could locate? R, C -- http://mail.python.org/mailman/listinfo/python-list
Re: general coding issues - coding style...
calmar schrieb:
Hi all,
since I'm just a 'handicraft'/beginner or so,
could anybody provide me with some (rough) hints, about how to enhance the
code
here:
- why are these {{{ thingies there?
- use string interpolation like Foo %s %i % (bar, 1) instead of
concatenating strings.
- it seems that you could benefit from a class instead of a bunch of
functions few globals. No need to go too crazy about OO, but it has
its merits
- try using something like glade - creating GUIs by hand sucks
big-timer :)
- read up about unicode and encodings, what they mean and why and when
to use what. Really. Most problems in that field stem from people being
sort of ignorant on that topic and just wiggling themselves through all
the time - in the end, messing up stuff. It really _isn't_ that complicated.
- when creating string-keyed dicts, the idiom
dict(foo=bar,
baz=pillepalle)
has its merits.
Besides that - looks ok to me.
Diez
--
http://mail.python.org/mailman/listinfo/python-list
Re: Komodo - Will it Lock Me In?
Le Fri, 17 Feb 2006 18:14:26 -0800, Trent Mick a écrit : Nope. Komodo adds no goo to your code (TM). TM's my name, not a trademark on Komodo adds no goo to your code -- but I'm thinking about it. :) +1 JOTW (Joke of the week) Cheers, Trent -- http://mail.python.org/mailman/listinfo/python-list
Re: Difference: __iadd__ and __add__
Jonathan Gardner wrote: I would like to point out that it isn't entirely obvious where to find documentation for this particular thing. I know from experience where to go, but I remember spending a long time trying to hunt this down. I'd like to point out it should be obvious, at least as far as going to http://docs.python.org and typing __iadd__ into the Search field in the upper right should be an obvious first step... For reference, you may want to check out the index of the language reference manual. http://www.python.org/doc/2.4.2/ref/genindex.html That one is the second hit in those results... (It does seem to require reading a few of those pages to learn enough to answer the original question. To be fair, I didn't find (in a few minutes) any page that explicitly states what [EMAIL PROTECTED] said, about += falling back to __add__ if __iadd__ is not defined, though I didn't try searching for it directly.) -Peter -- http://mail.python.org/mailman/listinfo/python-list
Numpy for PythonCE
Hi, is there a version of Numpy (or Numarray) available that is compatible to PythonCE 2.3? -- http://mail.python.org/mailman/listinfo/python-list
Re: GDI in python?
al pacino wrote: is it possible to address the 'screen pixels' using python , like analogous to older dos( functions that graphics.h provides') or win api calls for gdi. what i want is to display clusters (in differetn colours) on screen using python. Almost any (or just any) GUI toolkit can do that. Check out wxPython, Tkinter, PyQT, Pygame, etc. For example, in the wxPython demo (two easy downloads to install and run on a Windows box), the Miscellaneous-DrawXXXList demo page shows how to draw sets of points, lines, rectangles, etc, directly to the display via a DeviceContext object. -Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: commenting out blocks of code
On Sat, 18 Feb 2006 03:14:49 +, Neil Hodgson wrote: I am the developer responsible for SciTE and the Ctrl+Q decision. Ctrl+Q is not reserved for Quit on every platform. [snip] Thank you for your thoughtful response. Although I'm not convinced by your reasoning, I will concede that perhaps my post was a little hasty. -- Steven. -- http://mail.python.org/mailman/listinfo/python-list
Difference between CPython, Python for .NET and IronPython?
What is the difference between CPython, Python for .NET, and IronPython? For example, if I'm running IronPython, can I access modules such as Numeric and numarray? As I understand it, interoperability with C# and .NET works in both directions with IronPython, but CPython modules cannot be imported, or? With Python for .NET I can import the .NET Framework and continue using CPython modules, or? What is the roadmap for IronPython, will it be possible to import CPython modules in the near future? One last question, is IronPython cross-platform. That is, can I use IronPython with Mono? Carl -- http://mail.python.org/mailman/listinfo/python-list
Re: Photo Management Python Application
Bill wrote: Does anyone know of a Python program that will re-name digital photo files in a date-time format based on the date stamp of the file? Not entirely sure since I can't parse the above sentence fully. Could you please reread it and consider rephrasing it? It really doesn't look like it makes sense as written. (renaming _in_ a date-time format? a format _based on_ the date stamp of a file?) -Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: Multi-threaded SSL
On 17 Feb 2006 23:37:22 -0800, [EMAIL PROTECTED] wrote: Thanks Alex. I hadn't noticed that example. I gave it a shot and still have the synchronization problems. While this may be because of a lack of understanding of twisted threads (again, perhaps I'm just not looking in the right places, but even the the API reference is sparse of explanation), I strongly suspect that there's something going on at a lower level, like the Open SSL wrapper or Open SSL on the system level. You probably couldn't find an explanation of Twisted threads due to the fact that Twisted is implemented almost exclusively without using threads at all. Aside from the large library of protocol implementations, this is one of its main selling points. ;) At this point, I'd just like to know if I should cut my losses and try a very rapid polling solution (*cringes*). Here are my attempts: Twisted SSL Foray: http://cixar.com/svn/mage/twisted_ssl_foray.py http://cixar.com/websvn/filedetails.php?repname=Cixarpath=%2Fmage%2Ftwisted_ssl_foray.pyrev=0sc=0 After reading my comment above, hopefully it is clear what is awry in this code. You cannot use sleep() in a Twisted application and expect anything to work well. Instead, a scheduling primitive is provided, reactor.callLater(delay, function[, *a[, **kw]]). However, rather than using the low-level APIs of twisted.web directly, you may be interested in using an implementation of this idea which already exists. Take a look at http://divmod.org/trac/wiki/DivmodNevow/Athena. The tutorial builds up a web page which does something very like what your code seems to be attempting. If you pursue the Twisted version, keep in mind the web-dedicated Twisted mailing list you can use as a resource: http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-web. Jean-Paul -- http://mail.python.org/mailman/listinfo/python-list
Re: Difference between CPython, Python for .NET and IronPython?
Carl Johan Rehn wrote: What is the difference between CPython, Python for .NET, and IronPython? For example, if I'm running IronPython, can I access modules such as Numeric and numarray? As I understand it, interoperability with C# and .NET works in both directions with IronPython, but CPython modules cannot be imported, or? With Python for .NET I can import the .NET Framework and continue using CPython modules, or? What is the roadmap for IronPython, will it be possible to import CPython modules in the near future? One last question, is IronPython cross-platform. That is, can I use IronPython with Mono? Carl I have asked similar 'question' some weeks ago in the German Python newsgroup. It seems, that that Pythonistas have generally not much interest in IronPython waiting for at least release 2.0 of it which is _perhaps_ expected to support Mono. It seems, that usage of IronPython is currently limited to Windows platform, but I was not able to attract any expert on it to give a clear answer to that. My own short test has shown, that compiled DLLs (extension modules) don't work in IronPython and the created .exe-s of simple Python scripts fail to run. Curious to hear if there will be any expert response to your posting here (except replies from people like me, who have no idea about the subject themselves). Claudio -- http://mail.python.org/mailman/listinfo/python-list
2-3 Tree Implementation
Hi Group: I am looking for some reference material to implement a 2-3 Tree in Python... Can anyone lead me in the right direction? thanks.. -- http://mail.python.org/mailman/listinfo/python-list
Re: strange error I can't figure out...
John Zenger wrote: It works fine for me. You must be having an indentation problem. Also, get rid of the comma at the end of that last print statement. Brian Blais wrote: Hello, I have an odd kind of Heisenbug in what looks like a pretty simple If you uncomment the one print statement I added in the progressBar class, you get the error: talk about a Heisenbug...it disappeared after reading this post...without changing anything. :) It reminds me of the many times that IT problems disappear then the tech looks at it. thanks, bb -- - [EMAIL PROTECTED] http://web.bryant.edu/~bblais -- http://mail.python.org/mailman/listinfo/python-list
Re: Difference between CPython, Python for .NET and IronPython?
For example, if I'm running IronPython, can I access modules such as Numeric and numarray? AFAIK not. You can run pure python modules, but not extensions containing native code. As I understand it, interoperability with C# and .NET works in both directions with IronPython, but CPython modules cannot be imported, or? If they are pure python they can. However, there isn't e.g. a os-module in IronPython (at least on mono under MacOSX) - so I guess the situation is similar to Jython: you are basically limited to what the host-runtime delivers. With Python for .NET I can import the .NET Framework and continue using CPython modules, or? Yes. It's a bridge. Problem is: you can't use Python-Objects in .NET-code, which is at least theoretically possible in IronPython (not sure if it has something like the jythonc of jython that makes that possible for jython, or if it can be done more automagically) What is the roadmap for IronPython, will it be possible to import CPython modules in the near future? I doubt it - it's just not the goal, after all you want the CLR precisely for _not_ needing bindings for C-libs on various platforms. However, I guess a goal is that you get all python modules in IronPython that are availablein the standard dist to make pure-python modules run out of the box. But I don't have any insights on that. One last question, is IronPython cross-platform. That is, can I use IronPython with Mono? Yes, I did so under mono/MacOSX. Diez -- http://mail.python.org/mailman/listinfo/python-list
Re: GDI in python?
Thanks claudio, that should work out fine. -- http://mail.python.org/mailman/listinfo/python-list
Re: Photo Management Python Application
You can play around with Pil, http://effbot.org/imagingbook/
I found this as being the date for a picture
import Image
i = Image.open('/media/hda8/Pictures/Elvis/dscn0178.jpg')
i._getexif()[36867]
'2006:02:18 14:07:55'
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Re: Does Plone support distinct sets of users in subgroups?
I was shy of setting up to recieve a bunch of emails, but I'll scope out the nttp option. Thanks to both of you. In article [EMAIL PROTECTED], [EMAIL PROTECTED] says... wheel: I'm not sure if this is the right venue for Plone questions, if not, could someone ref me to a better one? The plone-users mailing list. Highly recommended. The discussion groups on the plone site are mailing lists and I'd rather not subscribe quite yet. Why not? It's free, takes 1 minute and you can unsubscribe at any time. Does plone support distinct sets of users? Yes. There's a user-group mechanism. http://plone.org/documentation/tutorial/understanding-permissions/tutorial-all-pages That is, on a public website running plone, can it be configured such that when a user logs in they are allowed access to a subgroup's main page, That can be done with local roles on the sharing tab. See the link above. get the subgroup's newsletter as well as the main site's newsletter etc? I'm not sure about that. I guess it depends on how you implement the newsletter. It may require a little customization or programming. -- http://mail.python.org/mailman/listinfo/python-list
share function argument between subsequent calls but not between class instances!
Hi, given the following example class class Test: def f(self,a, L=[]): L.append(a) return L and the following statements a = Test() a.f(0) a.f(0) a.f(0) b = Test() b.f(0) this is the output I would like to have (i.e., expect) a = Test() a.f(0) [0] a.f(0) [0, 0] a.f(0) [0, 0, 0] b = Test() b.f(0) [0] But this is what I get: a = Test() a.f(0) [0] a.f(0) [0, 0] a.f(0) [0, 0, 0] b = Test() b.f(0) [0, 0, 0, 0] as you can see, the b.f method shares L with a.f. How can I avoid this without using eg. self.L in an __init__? Thanks in advance, Karel. -- http://mail.python.org/mailman/listinfo/python-list
Re: share function argument between subsequent calls but not between class instances!
Em Sáb, 2006-02-18 às 17:42 +0100, K. Jansma escreveu: How can I avoid this without using eg. self.L in an __init__? Why not use it? That's how it's meant to be done! Thanks in advance, Karel. Cya, Felipe. -- Quem excele em empregar a força militar subjulga os exércitos dos outros povos sem travar batalha, toma cidades fortificadas dos outros povos sem as atacar e destrói os estados dos outros povos sem lutas prolongadas. Deve lutar sob o Céu com o propósito primordial da 'preservação'. Desse modo suas armas não se embotarão, e os ganhos poderão ser preservados. Essa é a estratégia para planejar ofensivas. -- Sun Tzu, em A arte da guerra -- http://mail.python.org/mailman/listinfo/python-list
Re: share function argument between subsequent calls but not between class instances!
K. Jansma wrote: as you can see, the b.f method shares L with a.f. How can I avoid this without using eg. self.L in an __init__? You cannot. If a method argument has a default value then the same default is used whenever the method is called. If you want each instance to have its own value then you must use an attribute on the instance. If you intend to only use the default some of the time, and at other times pass in a different list, then save the 'default' in the instance and use a special marker value to indicate when you intend the default to be used: marker = object() class Test(object): def __init__(self): self.L = [] def f(self,a, L=marker): if L is marker: L = self.L L.append(a) return L -- http://mail.python.org/mailman/listinfo/python-list
Re: share function argument between subsequent calls but not between class instances!
Em Sáb, 2006-02-18 às 16:50 +, Duncan Booth escreveu: marker = object() class Test(object): def __init__(self): self.L = [] def f(self,a, L=marker): if L is marker: L = self.L L.append(a) return L As hasattr(None, append) == False, you could also do: class Test(object): def __init__(self): self.L = [] def f(self, a, L=None): if L is None: L = self.L L.append(a) return L -- Quem excele em empregar a força militar subjulga os exércitos dos outros povos sem travar batalha, toma cidades fortificadas dos outros povos sem as atacar e destrói os estados dos outros povos sem lutas prolongadas. Deve lutar sob o Céu com o propósito primordial da 'preservação'. Desse modo suas armas não se embotarão, e os ganhos poderão ser preservados. Essa é a estratégia para planejar ofensivas. -- Sun Tzu, em A arte da guerra -- http://mail.python.org/mailman/listinfo/python-list
[DICTIONARY] - Copy dictionary entries to attributes
remark: not sure if the term dictionary is correct here. I have the following situation: within a setup.cfg, settings are passed this way: settings=project_page=theProjectPage.com myVar=myValue those are accessible later like this: settings['project_page'] / settings['myValue'] - Now my question: is there any standard function to map the settings directly to attributes? something like: dictionary_make_attributes(settings) thus they can be accessed via: settings.project_page / settings.myVar or copy_dictionary_entries_to_attributes(vars, settings) vars.project_page / vars.myVar ? . -- http://lazaridis.com -- http://mail.python.org/mailman/listinfo/python-list
Re: general coding issues - coding style...
On 2006-02-18, Diez B. Roggisch [EMAIL PROTECTED] wrote:
Hi Diez,
- why are these {{{ thingies there?
markers for folding for vim
http://www.calmar.ws/tmp/sc.png
- use string interpolation like Foo %s %i % (bar, 1) instead of
concatenating strings.
I see, get's shorter and so, and I can break lines.
(seems to me, after ( or [ or so, I can use a new line without
to worry)
- it seems that you could benefit from a class instead of a bunch of
functions few globals. No need to go too crazy about OO, but it has
its merits
I see. Maybe I could then build some classes for that prog,
especially since I use only one file, it probably would make
some sense for getting a better structure.
- try using something like glade - creating GUIs by hand sucks
big-timer :)
I should (seriously) check out probably.
- read up about unicode and encodings, what they mean and why and when
to use what. Really. Most problems in that field stem from people being
sort of ignorant on that topic and just wiggling themselves through all
the time - in the end, messing up stuff. It really _isn't_ that complicated.
I read up. In fact, basically it does not seem to be that complicate.
Unicode just a 'numbered' list of all available character, and
e.g. uft-8 a organized way to 'store' those 'numbers' wisely
into bytes.
I still have some problems with that (and gave up), but since I begin to
now understand it somebit more, I should try/check again.
- when creating string-keyed dicts, the idiom
dict(foo=bar,
baz=pillepalle)
I see, I changed too.
Thanks a lot,
marco
--
calmar
(o_ It rocks: LINUX + Command-Line-Interface
//\
V_/_ http://www.calmar.ws
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Re: [DICTIONARY] - Copy dictionary entries to attributes
Ilias Lazaridis schrieb: remark: not sure if the term dictionary is correct here. I have the following situation: within a setup.cfg, settings are passed this way: settings=project_page=theProjectPage.com myVar=myValue those are accessible later like this: settings['project_page'] / settings['myValue'] - Now my question: is there any standard function to map the settings directly to attributes? something like: dictionary_make_attributes(settings) thus they can be accessed via: settings.project_page / settings.myVar or copy_dictionary_entries_to_attributes(vars, settings) vars.project_page / vars.myVar Either you use __getitem__, or the bunch-recipe: http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52308 Diez -- http://mail.python.org/mailman/listinfo/python-list
Get parameters from URL using CGI
i want to create a CGI script which simply prints out values given via the URL (such as when a GET is performed). So if I have a script named, foo.cgi and I access it by going to: http://www.somesite.com/cgi-bin/foo.cgi?name=johnage=90 I want foo.cgi to print out: name: john age: 90 how do i get the values from the URL like that? thanks -- http://mail.python.org/mailman/listinfo/python-list
Re: Another stupid newbie question
Steven D'Aprano wrote: On Fri, 17 Feb 2006 11:51:08 -0800, Byte wrote: Great, thanks all. Now, how come if x == mx: print x break Dosnt work? Do yourself a HUGE favour and read this before posting any more questions to comp.lang.python. Trust me, you really will thank us. http://www.catb.org/~esr/faqs/smart-questions.html If he doesn't lambast us I'll chalk it up as a win :-) regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC www.holdenweb.com PyCon TX 2006 www.python.org/pycon/ -- http://mail.python.org/mailman/listinfo/python-list
Re: commenting out blocks of code
Steven D'Aprano wrote: On Fri, 17 Feb 2006 19:12:01 -0500, Peter Hansen wrote: john peter wrote: is there a similar mechanism in python, other than prefixing the '#' character to the start of each statement i do not want to execute (which gets old very quickly if one needs to comment and uncomment several statements a couple of times while playing around with code say during initial design)? In addition to the approach Paul has suggested, you should also consider using a better editor, as most decent editors should have some kind of block comment/uncomment feature that prevents that operation from getting old very quickly... Scite, for example, lets me selected a block and hit Ctrl-Q to either comment or uncomment the block. I see the developers of Scite are either newbies to GUI programming, or they operate in a world of their own. Ctrl-Q is reserved for Quit (or Exit) in every GUI API I know of. I don't think this is common enough to regard as any kind of de facto standard. Just to give two further counterexamples, neither TextPad nor Notepad action a Ctrl/Q in that way. Perhaps I'm just using the wrong operating system? (It does this by prefixing each line with #~ instead of just #, which allows it to detect when a line is already so commented and reverse the operation.) It is *easy* to detect when a line is already commented. It starts with a #. The ~ is superfluous. Commenting and uncommenting should be two different commands: the whole point of nested comments is that it allows you to comment a block of text which may already contain comments. Having one command do both commenting and uncommenting according to the presence or absence of semantic clues in the text is a recipe for failure (No you stupid computer, I want to COMMENT that block, not uncomment it!!!). Imagine if your text editor used cntl-C for both copy and paste, somehow guessing whether you wanted to copy selected text or paste over it according to some subtle clue in the text itself. Wouldn't that be fun? I agree that's a less-than-sensible feature implementation. regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC www.holdenweb.com PyCon TX 2006 www.python.org/pycon/ -- http://mail.python.org/mailman/listinfo/python-list
Making mouse wheel work with pmw ScrolledCanvas widget
Hi, I am using the pmw tkinter package and having trouble getting the ScrolledCanvas widget to respond to the mouse wheel. I am running Windows XP. I've Googled it and came up empty. I believe it should be possible because Idle's editor window supports scrolling with a mouse wheel. Thanks in advance, Dan Gass -- http://mail.python.org/mailman/listinfo/python-list
Re: Twisted book opinions?
In article [EMAIL PROTECTED], Andrew Gwozdziewycz [EMAIL PROTECTED] wrote: It's really more of an example based tutorial book than cookbook. What it does do really well is 'networking programming essentials'. I found it quite a good book and managed to write a distributed ssh cron tool in an evening after reading the sections on SSH. I would second that. The examples are very good, and it breaks down the code and explains the new concepts. What I'd really like now is a 'Web Application Development with Twisted/Nevow' book that takes off where this 'network protocol' oriented book leaves off. I thought the O'Reilly book was pretty decent at describing how to setup a web application. It's not entirely complete, but I was able to piece together an application with a somewhat complex web application on top of it. Twisted made it quite easy. The book does Twisted basics very well. The examples are many and they are just the right size for grasping how to do things. My only gripe is that the way it produces HTML code in the web examples is very primitive. You should be using Stan (a very Pythonic DOM) instead of the explicit strings that are used throughout the book. Fortunately there is an on-line tutorial for Stan, which is very good. http://www.kieranholland.com/code/documentation/nevow-stan/ Jacob Hallén -- -- http://mail.python.org/mailman/listinfo/python-list
Re: Python 3000 deat !? Is true division ever coming ?
[EMAIL PROTECTED] wrote: Thank you very much, Magnus ! This is the answer I had been waiting for: A problem as I see it today, is that this behaviour is not actively encouraged. The tutorial, which is maintained and updated, still describes old style classes, and the old division behaviour. My main point was/is: why is there not more discussion about true division !!? You are about three years too late for the discussion. It was debated to death when Guido proposed that Python should behave more like non-programmers expected it to. Despite some fierce opposition this view eventually held sway, and now long-time Pythonistas accept it as the way forward. So basically most people saw your question and probably thought enough, already!. Just like the second answer to my posting clearly showed: PEOPLE THINK TRUE DIVISION IS ONLY IN MATLAB !! As you pointed out: the true division part of Python3000 might be one of the scariest and should therefore be pointed out already in the tutorial !! (It would look quite ugly to newcomers, though) Having said that: I would vote against EVER introducing true division as default - because it will just PISS too many (long time python) people OFF. ;-) I think you underestimate the power of the Python community to adapt to change when it's necessary for the long-term benefit of the language. Thanks, Sebastian Haase [...] regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC www.holdenweb.com PyCon TX 2006 www.python.org/pycon/ -- http://mail.python.org/mailman/listinfo/python-list
Re: PyProtocols, Components, and Inheritance
On Thu, 16 Feb 2006 23:53:51 -0600 Terry Hancock [EMAIL PROTECTED] wrote: I've been discussing PyProtocols with a a friend collaborating with me on a SF game project, about the benefits and design concept of component architecture, and I'm a little confused by what I'm learning. [...] Nevermind, he explained what he was doing -- it isn't a PyProtocols issue after all. He wanted components to be bound dynamically to individual objects. I agree with him that it's a useful thing in this application. It's still weird, but I see why he wants it. Now, I just have to figure out how to document it clearly. ;-) Thanks anyway, Terry -- Terry Hancock ([EMAIL PROTECTED]) Anansi Spaceworks http://www.AnansiSpaceworks.com -- http://mail.python.org/mailman/listinfo/python-list
Re: Numpy for PythonCE
G��� wrote: Hi, is there a version of Numpy (or Numarray) available that is compatible to PythonCE 2.3? I haven't heard of anyone trying. Perhaps you could try compiling the latest SVN of numpy and tell us how it goes on [EMAIL PROTECTED] . -- Robert Kern [EMAIL PROTECTED] In the fields of hell where the grass grows high Are the graves of dreams allowed to die. -- Richard Harter -- http://mail.python.org/mailman/listinfo/python-list
Re: Should we still be learning this?
I was initally annoyed that Dive into Python has the UserDict, but it was so easy to discover it was deprecated http://docs.python.org/lib/module-UserDict.html (althought the term 'deprecated' is not specifically used), that anyone on the ball (the OP seemed to know) would not based their next big project on UserDict. I agree that Python has so many good concepts, and improvements with each new version, that something in a course will be outdated. I can concur that knowing Python made it much easier to go back to C++ and Java and understand the OO. My tip for an book on Python with only the latest information, nothing beats the Python Pocket Reference, 3rd edition, (O'Reilly) which is updated for 2.4 and seems to clearly label any deprecated features. -- http://mail.python.org/mailman/listinfo/python-list
Re: define loop statement?
David Isaac wrote: I would like to be able to define a loop statement (nevermind why) so that I can write something like loop 10: do_something instead of for i in range(10): do_something Possible? If so, how? Ruby and Smalltalk are both good at this kind of thing, since they have syntactic support for associating a block with each method call. In Python, I think you just have to do a little more setup. How about something like this? class Loop: def __init__(self, n): self.n = n def __call__(self): self.n = self.n - 1 return self.n != 0 if __name__ == '__main__': loop = Loop(10) while loop: print OK -- http://mail.python.org/mailman/listinfo/python-list
Re: define loop statement?
Jeffrey Schwab wrote: class Loop: def __init__(self, n): self.n = n def __call__(self): self.n = self.n - 1 return self.n != 0 if __name__ == '__main__': loop = Loop(10) while loop: print OK Seems you forgot () after while loop above. Georg -- http://mail.python.org/mailman/listinfo/python-list
Tkinter / Aqua (OS X) question (canvas borders)
This is a beginner question. I am using a Mac running OS X. I have
TclTkAqua installed. If I type:
import Tkinter
r = Tkinter.Tk()
c = Tkinter.Canvas(r)
c.pack()
c.create_line(0,0,100,0)
the line is not visible. If I type:
c.create_line(3,4,100,4)
the line is visiable. There appears to be an asymmetric border
around the inside of the canvas. If I type
print c.cget('padx'), c.cget('pady')
I get zero. How do I find out the size of the border? Is this
specific to the Aqua version of Tk?
I have X Windows installed. Would I be better off if I down loaded the
Unix version of Tk and Tkinter/python and compiled it for X?
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Re: Get parameters from URL using CGI
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
abcd wrote:
i want to create a CGI script which simply prints out values given via
the URL (such as when a GET is performed).
So if I have a script named, foo.cgi and I access it by going to:
http://www.somesite.com/cgi-bin/foo.cgi?name=johnage=90
I want foo.cgi to print out:
name: john
age: 90
how do i get the values from the URL like that?
thanks
from urlparse import urlparse
dict([n for n in [i.split('=') for i in
urlparse('http://www.somesite.com/cgi-bin/foo.cgi?name=johnage=90')[4].split('')]])
{'age': '90', 'name': 'john'}
-BEGIN PGP SIGNATURE-
Version: GnuPG v1.4.1 (GNU/Linux)
iD8DBQFD94zrefZ4eWAXRGIRAlEhAJ49x7kaIe/VcU5DUbt8bv9tQCNrmQCfWOED
tmkTISLqzIKDz2c4mfR6+k8=
=OMOX
-END PGP SIGNATURE-
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Tab Character?
How do I make a tab character in code to split a line read with tabs in it? Thanks. Tom -- http://mail.python.org/mailman/listinfo/python-list
Re: Tab Character?
Tab is \t . As in: print coke\tpepsi tsvline.split(\t) [EMAIL PROTECTED] wrote: How do I make a tab character in code to split a line read with tabs in it? Thanks. Tom -- http://mail.python.org/mailman/listinfo/python-list
Re: 2-dimensional data structures
Tim Chase wrote:
I want to work on a sudoku brute-forcer, just for fun.
Well, as everybody seems to be doing these (self included...), the
sudoku solver may become the hello world of the new world :)
What is the equivalent way to store data in python? - It isn't obvious
to me how to do it with lists.
Several other answers have crossed the list. I've done it using a
dictionary of tuples:
grid = {}
for row in range(1,10):
for col in range(1,10):
grid[(row,col)] = value
item = grid[(3,2)]
etc.
Seemed fairly quick and worked for me.
Thanks for the advice (to everyone in the thread).
I think I will go with nested lists.
However, I am running into a conceptual problem.
My approach will be firstly to remove all the impossible digits for a
square by searching the row and column for other occurances.
However, I wondering how to approach the search of the nine regions of
the grid. I am thinking of producing another nested list, again 9x9 to
store the contents of each region, and to update this after each pass
through -and update of- the main grid (row and column).
I am not sure how to most efficiently identify which region any given
square on the grid is actually in - any thoughts, for those that have
done this? - I don't want a massive list of IF conditionals if I can
avoid it.
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Re: share function argument between subsequent calls but not between class instances!
Duncan Booth [EMAIL PROTECTED] writes: If you intend to only use the default some of the time, and at other times pass in a different list, then save the 'default' in the instance and use a special marker value to indicate when you intend the default to be used: The most common idiom for such a marker is the None value. class Test(object): def __init__(self): self.L = [] def f(self, a, L=None): if L is None: L = self.L L.append(a) return L -- \Consider the daffodil. And while you're doing that, I'll be | `\ over here, looking through your stuff. -- Jack Handey | _o__) | Ben Finney http://www.benfinney.id.au/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Tab Character?
[EMAIL PROTECTED] [EMAIL PROTECTED] writes: How do I make a tab character in code to split a line read with tabs in it? For such non-printing characters it's best not to have them literally in your code, but to use an escape sequence to generate them at run-time:: foo = \t print foo print ord(foo) 9 This is explained in the String literals section of the Python reference. URL:http://docs.python.org/dev/ref/strings.html -- \ A celebrity is one who is known by many people he is glad he | `\ doesn't know. -- Henry L. Mencken | _o__) | Ben Finney -- http://mail.python.org/mailman/listinfo/python-list
Re: 2-dimensional data structures
From: anthonyberet Date: 02/18/06 17:11:01 To: python-list@python.org Subject: Re: 2-dimensional data structures I am not sure how to most efficiently identify which region any given square on the grid is actually in - any thoughts, for those that have done this? - I don't want a massive list of IF conditionals if I can avoid it. Kermit says: There is a MUCH more efficient way to do this! If you are doing a 9 by 9 soduku, Each row and column has exactly the digits 1 through 9 Think of your data as being in a list 81 cells long that is accessed 3 different ways. As a 9 by 9, row wise, As a 9 by 9 column wise As a 3 by 3 by 9 where the first two subscripts identify the region, and the last identify one of the 9values within the region. And , most important, To search for a value not yet in a row, column, or region, Define holding list of length 9. Supposea row has 4,2,8 in it, and the corresponding column has 2,3,1 in it and the correspond region has 2, 7, 6 in it. Then you initialize your hold vector to -1, and set hold(4) = 4 hold(2) = 1 hold(8) = 1 hold(2) = 1 hold (3) = 1 hold(1) = 1 hold(2) = 1 hold(7) = 1 hold(6) = 1 Then by scaning only the nine elements of hold, you see that hold(5) = -1, , and hold(9) = -1 are the only values not reset, and only 5 and 9 are possible choices for the target cell. -- http://mail.python.org/mailman/listinfo/python-list
Re: define loop statement?
Jeffrey Schwab wrote: class Loop: def __init__(self, n): self.n = n def __call__(self): self.n = self.n - 1 return self.n != 0 if __name__ == '__main__': loop = Loop(10) while loop: Whoops. Should be while loop(). print OK -- http://mail.python.org/mailman/listinfo/python-list
Re: Pyserial never read
Thanks for your help, but it don't solve the problem. I receive only the echo and full stop. Many Thanks Best Regards Luca -- http://mail.python.org/mailman/listinfo/python-list
Re: 2-dimensional data structures
However, I wondering how to approach the search of the nine regions of the grid. I am thinking of producing another nested list, again 9x9 to store the contents of each region, and to update this after each pass through -and update of- the main grid (row and column). I am not sure how to most efficiently identify which region any given square on the grid is actually in - any thoughts, for those that have done this? - I don't want a massive list of IF conditionals if I can avoid it. The question is not so much which region a give square is in, but more which square contains which fields. If we assume that you number your squares row-wise (top-left zero, top-right 3, bottom-right 9), this function computes the field indices that a given square is composed of: def scoords(n): square_row = n / 3 square_col = n % 3 start_row = square_row * 3 # ( this is _not_ n!!) start_column = square_col * 3 for x in xrange(start_column, start_column + 3): for y in xrange(start_row, start_row + 3): yield (x,y) print list(coords(4)) Regards, Diez -- http://mail.python.org/mailman/listinfo/python-list
Re: 2-dimensional data structures
Diez B. Roggisch schrieb: The question is not so much which region a give square is in, but more which square contains which fields. If we assume that you number your squares row-wise (top-left zero, top-right 3, bottom-right 9), this function computes the field indices that a given square is composed of: I'm confusing squares with fields here. What I meant by a square here is the 3x3 region, of which 9 exist. Each has 3x3=9 cells. Diez -- http://mail.python.org/mailman/listinfo/python-list
Re: define loop statement?
Alan Isaac wrote: I would like to be able to define a loop statement (nevermind why) so that I can write something like loop 10: do_something instead of for i in range(10): do_something Possible? If so, how? Jeffrey Schwab [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] class Loop: def __init__(self, n): self.n = n def __call__(self): self.n = self.n - 1 return self.n != 0 if __name__ == '__main__': loop = Loop(10) while loop(): print OK OK, that's pretty good. Thanks! Alan Isaac -- http://mail.python.org/mailman/listinfo/python-list
Re: define loop statement?
Em Sáb, 2006-02-18 às 20:04 +, Jeffrey Schwab escreveu: if __name__ == '__main__': loop = Loop(10) while loop: print OK Maybe: while Loop(10)(): print OK Looks rather ugly but requires one less line ;-). -- Quem excele em empregar a força militar subjulga os exércitos dos outros povos sem travar batalha, toma cidades fortificadas dos outros povos sem as atacar e destrói os estados dos outros povos sem lutas prolongadas. Deve lutar sob o Céu com o propósito primordial da 'preservação'. Desse modo suas armas não se embotarão, e os ganhos poderão ser preservados. Essa é a estratégia para planejar ofensivas. -- Sun Tzu, em A arte da guerra -- http://mail.python.org/mailman/listinfo/python-list
Re: general coding issues - coding style...
Hi,
1585 if sys.path[0][-12:] == \library.zip: #for py2exe
how about
if sys.path[0].endswith( \\library.zip ):
(did you really mean one back-slash there?)
499 tuple = os.path.split(filename)
bad variable name... tuple(x) converts a sequence to a tuple.
You have a number of places where you check for len(x)==0:
674 if len(files) == 0:
853 if len(file_show) == 0:
950 if len(imgprocess[files_todo]) == 0:
people usually recommend:
if not files:
if not file_show:
if not imgprocess[files_todo]:
you should run your code through pychecker (it had a lot to say...).
You use global alot... that should be a red flag. Like the poster
above mentioned, you have things that are telling you they want to
be objects.
The #{{{ and #}}} stuff is very annoying to other programmers
(ok, to me...). You might want to investigate a Python aware
editor (like SPE, which has pychecker built in). This is
coming from someone who uses vim regularly.
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Re: general coding issues - coding style...
calmar wrote:
On 2006-02-18, Diez B. Roggisch [EMAIL PROTECTED] wrote:
- why are these {{{ thingies there?
markers for folding for vim
http://www.calmar.ws/tmp/sc.png
I would look into one of the many Vim scripts which automatically fold
most large blocks without the ugly {{{.
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Re: 2-dimensional data structures
anthonyberet wrote:
Tim Chase wrote:
I want to work on a sudoku brute-forcer, just for fun.
Well, as everybody seems to be doing these (self included...), the
sudoku solver may become the hello world of the new world :)
What is the equivalent way to store data in python? - It isn't obvious
to me how to do it with lists.
Several other answers have crossed the list. I've done it using a
dictionary of tuples:
grid = {}
for row in range(1,10):
for col in range(1,10):
grid[(row,col)] = value
item = grid[(3,2)]
etc.
Seemed fairly quick and worked for me.
Thanks for the advice (to everyone in the thread).
I think I will go with nested lists.
However, I am running into a conceptual problem.
My approach will be firstly to remove all the impossible digits for a
square by searching the row and column for other occurances.
However, I wondering how to approach the search of the nine regions of
the grid. I am thinking of producing another nested list, again 9x9 to
store the contents of each region, and to update this after each pass
through -and update of- the main grid (row and column).
I am not sure how to most efficiently identify which region any given
square on the grid is actually in - any thoughts, for those that have
done this? - I don't want a massive list of IF conditionals if I can
avoid it.
Here's another way:
def region_map():
for row in range(9):
for col in range(9):
region = (row/3,col/3)
print region,
print
def identify_region(cell):
return (cell[0]/3,cell[1]/3)
def create_regions():
regions = {}
for row in range(9):
for col in range(9):
rowcol = (row,col)
reg = (row/3,col/3)
if regions.has_key(reg):
regions[reg].append(rowcol)
else:
regions[reg] = [rowcol]
return regions
grid = [[0,0,6,0,7,0,0,0,0], \
[0,3,5,4,0,0,0,9,0], \
[0,0,0,0,0,6,1,2,0], \
[0,0,0,0,0,3,2,0,8], \
[0,0,0,0,6,0,0,0,0], \
[4,0,7,2,0,0,0,0,0], \
[0,5,2,1,0,0,0,0,0], \
[0,7,0,0,0,5,9,1,0], \
[0,0,0,0,4,0,3,0,0]]
print 'the grid:'
for g in grid: print g
print
print 'the region ids:'
region_map()
print
# create the region dictionary
regions = create_regions()
# pick an arbitrary cell
cell = (5,5)
reg_id = identify_region(cell)
print 'cell:',cell,'is in region:',reg_id
print
print 'region',reg_id,'contains:'
reg_data = regions[reg_id]
for c in reg_data:
print grid[c[0]][c[1]],
the grid:
[0, 0, 6, 0, 7, 0, 0, 0, 0]
[0, 3, 5, 4, 0, 0, 0, 9, 0]
[0, 0, 0, 0, 0, 6, 1, 2, 0]
[0, 0, 0, 0, 0, 3, 2, 0, 8]
[0, 0, 0, 0, 6, 0, 0, 0, 0]
[4, 0, 7, 2, 0, 0, 0, 0, 0]
[0, 5, 2, 1, 0, 0, 0, 0, 0]
[0, 7, 0, 0, 0, 5, 9, 1, 0]
[0, 0, 0, 0, 4, 0, 3, 0, 0]
the region ids:
(0, 0) (0, 0) (0, 0) (0, 1) (0, 1) (0, 1) (0, 2) (0, 2) (0, 2)
(0, 0) (0, 0) (0, 0) (0, 1) (0, 1) (0, 1) (0, 2) (0, 2) (0, 2)
(0, 0) (0, 0) (0, 0) (0, 1) (0, 1) (0, 1) (0, 2) (0, 2) (0, 2)
(1, 0) (1, 0) (1, 0) (1, 1) (1, 1) (1, 1) (1, 2) (1, 2) (1, 2)
(1, 0) (1, 0) (1, 0) (1, 1) (1, 1) (1, 1) (1, 2) (1, 2) (1, 2)
(1, 0) (1, 0) (1, 0) (1, 1) (1, 1) (1, 1) (1, 2) (1, 2) (1, 2)
(2, 0) (2, 0) (2, 0) (2, 1) (2, 1) (2, 1) (2, 2) (2, 2) (2, 2)
(2, 0) (2, 0) (2, 0) (2, 1) (2, 1) (2, 1) (2, 2) (2, 2) (2, 2)
(2, 0) (2, 0) (2, 0) (2, 1) (2, 1) (2, 1) (2, 2) (2, 2) (2, 2)
cell: (5, 5) is in region: (1, 1)
region (1, 1) contains:
0 0 3 0 6 0 2 0 0
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Re: general coding issues - coding style...
Dylan Moreland wrote:
I would look into one of the many Vim scripts which automatically fold
most large blocks without the ugly {{{.
Who needs a script?
set foldmethod=indent
works pretty well for most python programs.
--
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Re: define loop statement?
Felipe Almeida Lessa wrote: Em Sáb, 2006-02-18 às 20:04 +, Jeffrey Schwab escreveu: if __name__ == '__main__': loop = Loop(10) while loop: print OK Maybe: while Loop(10)(): print OK Looks rather ugly but requires one less line ;-). Doesn't work. You get a NEW Loop(10) instance on each pass through the 'while'. This is just an expensive way to make an endless loop. -- Nigel Rowe A pox upon the spammers that make me write my address like.. rho (snail) swiftdsl (stop) com (stop) au -- http://mail.python.org/mailman/listinfo/python-list
Re: define loop statement?
Em Dom, 2006-02-19 às 11:08 +1100, Nigel Rowe escreveu: Felipe Almeida Lessa wrote: Em Sáb, 2006-02-18 às 20:04 +, Jeffrey Schwab escreveu: if __name__ == '__main__': loop = Loop(10) while loop: print OK Maybe: while Loop(10)(): print OK Looks rather ugly but requires one less line ;-). Doesn't work. You get a NEW Loop(10) instance on each pass through the 'while'. This is just an expensive way to make an endless loop. Oh, sorry, ignore me on that one. Now I think I should sleep =S... -- Quem excele em empregar a força militar subjulga os exércitos dos outros povos sem travar batalha, toma cidades fortificadas dos outros povos sem as atacar e destrói os estados dos outros povos sem lutas prolongadas. Deve lutar sob o Céu com o propósito primordial da 'preservação'. Desse modo suas armas não se embotarão, e os ganhos poderão ser preservados. Essa é a estratégia para planejar ofensivas. -- Sun Tzu, em A arte da guerra -- http://mail.python.org/mailman/listinfo/python-list
Multiplication optimization
Does Python's run-time do any optimization of multiplication operations, like it does for boolean short-cutting? That is, for a product a*b, is there any shortcutting of (potentially expensive) multiplication operations as in: if a == 0 return 0 if a == 1 return b return a*b Of course, for the cases where a is not 0 or 1 we are adding two comparisons to each multiply operation. But in some applications (sparse matrices? binary conversion?), the multiplication step could be avoided in many cases, if the user was aware that left-to-right short-cutting were implemented. Or by adding two *more* comparisons, then all multiplications would be optimized: if a == 0 or b == 0 return 0 if a == 1 return b if b == 1 return a return a*b But this seems overkill, especially since boolean short-cutting only works left-to-right. Just curious... -- Paul -- http://mail.python.org/mailman/listinfo/python-list
Re: ANN: Release of NumPy 0.9.5
vinjvinj wrote: I read some of the earlier threads which essentially said that numpy is about 3-4 times slower then Numeric for smaller arrays. I'm assuming that applies only to operations that apply to the whole arrays. I was curious how the performance of the following operations would compare though: 1. Copying arrays 2. Creating arrays 3. Slicing Arrays It is really hard to say unless you show specific applications: But, here are some facts. 1) NumPy is in C just like Numeric 2) NumPy is more flexible than Numeric and that means a few more if-statements and checks which can slow-down array creation and slicing. 3) Some optimizations have been done to remove unnecessary slowness (e.g. unnecessary checking but more could be done). 4) Ufuncs have more overhead primarily because of a) the ability to alter how errors are obtained using local / global variables (these must be looked-up in a dictionary which is most of the source of any performance penalty), b) the ability for other objects that can be converted to arrays to interact with ufuncs so that the original object is returned by the ufuncs c) the fact that excessive copying is not done in order to type-cast from one array to annother, this requires some set-up overhead My understanding is that most of the slow-downs reported for small arrays can be attributed to ufuncs, but there will be slower paths through the C-code for other cases as well because of the increased flexibility. Our goal is to be as fast as we can be so give it a spin and tell us how to improve... Thanks, -Travis -- http://mail.python.org/mailman/listinfo/python-list
Re: 2-dimensional data structures
anthonyberet wrote: Thanks for the advice (to everyone in the thread). I think I will go with nested lists. However, I am running into a conceptual problem. My approach will be firstly to remove all the impossible digits for a square by searching the row and column for other occurances. However, I wondering how to approach the search of the nine regions of the grid. I am thinking of producing another nested list, again 9x9 to store the contents of each region, and to update this after each pass through -and update of- the main grid (row and column). I am not sure how to most efficiently identify which region any given square on the grid is actually in - any thoughts, for those that have done this? - I don't want a massive list of IF conditionals if I can avoid it. When I wrote my Sudoku solver (a terribly inefficient and naive recursive algorithm that I originally wrote in C++ and was the first thing I ever wrote in Python), I used numarray. It allows two-dimensional slicing: def inBlock(x, y, val): blockX = x/size * size blockY = y/size * size return val in sudoku[blockX:blockX+size, blockY:blockY+size] 'size' in this example is a global variable equal to the size of the puzzle, so 3 for a normal puzzle. 'sudoku' is a global two-dimensional array simply holding the values in the puzzle. (There are any number of things in this can be improved, such as using the // floor division operator rather than /, not using global variables, and so on. What can I say? It was a straight conversion from C++. I hardly knew what Pythonic meant.) -Kirk McDonald -- http://mail.python.org/mailman/listinfo/python-list
Re: Multiplication optimization
On Sat, 18 Feb 2006 16:48:38 -0800, Paul McGuire wrote: Does Python's run-time do any optimization of multiplication operations, like it does for boolean short-cutting? Do you know that these shortcuts are optimizations, or are you just assuming it takes less time to do the comparison than it would for the CPU to blast bits around? I have no idea whether your shortcuts are optimizations or pessimizations. I'm just asking whether you know, or if you are making assumptions. -- Steven. -- http://mail.python.org/mailman/listinfo/python-list
Re: Multiplication optimization
[Paul McGuire]
Does Python's run-time do any optimization of multiplication
operations, like it does for boolean short-cutting?
Usually, it is safest (and typically true) to assume that Python
performs no optimizations. To go beyond making assumptions, it is easy
to run a few timings:
from timeit import Timer
min(Timer('0*1234567').repeat(5))
0.11315376674968469
min(Timer('1*1234567').repeat(5))
0.11920453577200618
min(Timer('113*1234567').repeat(5))
0.11881482143680699
In your specific case, I can answer than the source shows no special
optimization for multiplications by specific values. There is a
short-path for integer multiplications but it is not value specific.
In Py2.5, the compiler will do a limited amount of constant folding;
however, its scope is somewhat limited because expressions like a*3
vary depending on the a's type which is often not knowable by the
compiler without some form of global analysis.
One other thought: Python is not assembly. Run time is unlikely to be
dominated by the time to execute a multiplication. With Python, it is
best to focus optimization efforts on making choosing the best data
structures and hoisting constants out of loops.
Raymond
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Re: define loop statement?
David Isaac wrote: I would like to be able to define a loop statement (nevermind why) so that I can write something like loop 10: do_something Here's a flagrant hack: import sys VAR_NAME = '__repeat_counter' def set_repeat_counter(value): frame = sys._getframe(2) frame.f_locals[VAR_NAME] = value def get_repeat_counter(value): frame = sys._getframe(2) if VAR_NAME not in frame.f_locals: frame.f_locals[VAR_NAME] = value return frame.f_locals[VAR_NAME] def repeat(limit): set_repeat_counter(get_repeat_counter(limit)-1) return get_repeat_counter(limit) while repeat(10): print 'OK' Without more work it doesn't allow nested loops though. And for the record, if you're worrying about Python's counted loop construct you need better things to worry about. insert-smilies-as-appropriate -- Benji York -- http://mail.python.org/mailman/listinfo/python-list
Re: Get parameters from URL using CGI
Ian Leitch wrote:
from urlparse import urlparse
dict([n for n in [i.split('=') for i in
urlparse('http://www.somesite.com/cgi-bin/foo.cgi?name=johnage=90')[4].split('')]])
{'age': '90', 'name': 'john'}
Ian, thanks for the reply, but that is not what I need to do. Inside
foo.cgi how can I parse out the values given in the URL?
So if you visit: http://www.somesite.com/cgi-bin/foo.cgi?valA=1valB=2
.I want the script, foo.cgi to print out the parameters and their
values. It's dynamic so the values are url wont be the same all the
time. How do i get the URL from the script? does this make sense?
So I'm thinking foo.cgi will look like
[code]
url = getTheFullURL()
parse(url)
def parse(url):
# parse the parameter names and values
[/code]
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Re: - Copy dictionary entries to attributes
Perhaps: def dictionary_make_attributes(self, settings): for k,v in settings: setattr(self, k, v) http://ftp.python.org/doc/lib/built-in-funcs.html#l2h-64 -- http://mail.python.org/mailman/listinfo/python-list
Re: Multiplication optimization
On 18 Feb 2006 16:48:38 -0800, Paul McGuire [EMAIL PROTECTED] wrote:
Does Python's run-time do any optimization of multiplication
operations, like it does for boolean short-cutting?
Here's the beginning of int_mul from Objects/intobject.c:
static PyObject *
int_mul(PyObject *v, PyObject *w)
{
long a, b;
long longprod; /* a*b in native long arithmetic */
double doubled_longprod;/* (double)longprod */
double doubleprod; /* (double)a * (double)b */
CONVERT_TO_LONG(v, a);
CONVERT_TO_LONG(w, b);
longprod = a * b;
doubleprod = (double)a * (double)b;
doubled_longprod = (double)longprod;
I think the rest of the function is probably irrelevant, as far as your
question goes.
Jean-Paul
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aborting without killing the python interpreter
I wrote a simple little function for exiting with an error message: def error ( message ): print_stack(); exit (\nERROR: + message + \n) It works fine for executing as a script, but when I run it interactively in the python interpreter it kills the interpreter. That's not what I want. Is there a simple way to have a script terminate but not have it kill the python interpreter when I run it interactively? I suspect I may need to use exceptions, but I'm hoping not to need them. Thanks. -- http://mail.python.org/mailman/listinfo/python-list
Python vs. Lisp -- please explain
Hi, I've been thinking about Python vs. Lisp. I've been learning Python the past few months and like it very much. A few years ago I had an AI class where we had to use Lisp, and I absolutely hated it, having learned C++ a few years prior. They didn't teach Lisp at all and instead expected us to learn on our own. I wasn't aware I had to uproot my thought process to get it and wound up feeling like a moron. In learning Python I've read more about Lisp than when I was actually trying to learn it, and it seems that the two languages have lots of similarities: http://www.norvig.com/python-lisp.html I'm wondering if someone can explain to me please what it is about Python that is so different from Lisp that it can't be compiled into something as fast as compiled Lisp? From this above website and others, I've learned that compiled Lisp can be nearly as fast as C/C++, so I don't understand why Python can't also eventually be as efficient? Is there some *specific* basic reason it's tough? Or is it that this type of problem in general is tough, and Lisp has 40+ years vs Python's ~15 years? Thanks Michael -- http://mail.python.org/mailman/listinfo/python-list
Re: strange error I can't figure out...
John Zenger wrote: Also, get rid of the comma at the end of that last print statement. This would break the progress bar functionality I think, which is meant to update a single line. -- Brian Beck Adventurer of the First Order -- http://mail.python.org/mailman/listinfo/python-list
Re: aborting without killing the python interpreter
Russ [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] I wrote a simple little function for exiting with an error message: def error ( message ): print_stack(); exit (\nERROR: + message + \n) It works fine for executing as a script, How? In the standard interpreter, 'exit' is bound to the string 'Use Ctrl-Z plus Return to exit.' so trying to call it as a function fails. but when I run it interactively in the python interpreter it kills the interpreter. That's not what I want. Is there a simple way to have a script terminate but not have it kill the python interpreter when I run it interactively? I suspect I may need to use exceptions, but I'm hoping not to need them. Thanks. The interactive interpreter runs a statement at a time and gives a prompt after any output. From a command shell, you can use a flag (-i I think) to enter interactive mode after the script end. Terry Jan Reedy -- http://mail.python.org/mailman/listinfo/python-list
Re: Seaching Active Directory via ADO
With help I have been able to put together a little example. It illustrates
several different ways..
import win32com.client
c = win32com.client.Dispatch(ADODB.Connection)
c.Open(Provider=ADSDSOObject)
##Check if connected to AD
if bool(c.state): print Connected to AD
## This uses sql dialect with no command object
##rs,rc=c.Execute(
##SELECT adspath, title, name
##From 'LDAP://DC=AD,DC=LOCAL'
##where objectCategory='Person' and objectClass='user' and name='*'
##)
##This uses ADSI dialect with not command object
##rs,rc=c.Execute(
##LDAP://DC=AD,DC=LOCAL;\
##((objectCategory=Person)(objectClass=user)(name=*));\
##name,adspath,title;\
##subtree
##)
##Command com with properties in sql dialect
##comm = win32com.client.Dispatch(ADODB.Command)
##comm.ActiveConnection = c
##comm.Properties('Page size').value=1000
##comm.CommandText = (\
##SELECT adspath, title, name \
##From 'LDAP://DC=AD,DC=LOCAL' \
##where objectCategory='Person' and objectClass='user' and name='*'\
##)
##rs,rc=comm.Execute()
##Command com with properties in ADSI dialect
##ADS_SCOPE_SUBTREE = 2
##ADS_SCOPE_ONELEVEL = 1
##ADS_SCOPE_BASE = 0
##comm = win32com.client.Dispatch(ADODB.Command)
##comm.ActiveConnection = c
##comm.Properties('Page size').value=1000
##comm.Properties('searchscope').value=ADS_SCOPE_SUBTREE
##comm.CommandText = (LDAP://DC=AD,DC=LOCAL;\
##((objectCategory=Person)(objectClass=user)(name=*));\
##name,adspath,title;)
##rs,rc=comm.Execute()
##Connect using recordset object in ADSI Dialect
##rs = win32com.client.Dispatch(ADODB.recordset)
##rs.ActiveConnection = c
##rs.source = (LDAP://DC=AD,DC=LOCAL;\
##((objectCategory=Person)(objectClass=user)(name=*));\
##name,adspath,title;\
##subtree)
##rs.Open()
##Connect using recordset object in sql Dialect
##rs = win32com.client.Dispatch(ADODB.recordset)
##rs.ActiveConnection = c
##rs.source = (\
##SELECT adspath, title, name \
##From 'LDAP://DC=AD,DC=LOCAL' \
##where objectCategory='Person' and objectClass='user' and name='*'\
##)
##rs.Open()
##while not rs.EOF:
##for f in rs.Fields:
##print f.Name, f.Value
##rs.MoveNext()
c.close
c = None
--
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Re: Python vs. Lisp -- please explain
[EMAIL PROTECTED] wrote: A few years ago I had an AI class where we had to use Lisp, and I absolutely hated it, having learned C++ a few years prior. They didn't teach Lisp at all and instead expected us to learn on our own. CS classes haven't changed, I see. In learning Python I've read more about Lisp than when I was actually trying to learn it, and it seems that the two languages have lots of similarities: http://www.norvig.com/python-lisp.html I'm wondering if someone can explain to me please what it is about Python that is so different from Lisp that it can't be compiled into something as fast as compiled Lisp? From this above website and others, I've learned that compiled Lisp can be nearly as fast as C/C++, so I don't understand why Python can't also eventually be as efficient? Is there some *specific* basic reason it's tough? Or is it that this type of problem in general is tough, and Lisp has 40+ years vs Python's ~15 years? It is by design. Python is dynamically typed. It is essentially an interpreted scripting language like javascript or ruby or perl, although python fans will be quick to tell you python is compiled to byte code. They'll also be quick to tell you: -python has true closures (although nothing like ruby's blocks) -is beginner friendly (despite being case sensitive and 3/4==0, for example) -is not, in fact, slow at all (despite benchmarks as you noted showing otherwise). Judge for yourself. There are projects that combine static typing + the python syntax, which result in dramatically faster code, but perhaps only 80% of python's functionality and less flexibility you get from dynamic typing. Projects like shedskin. But some python fans don't think 80% cuts it, even if you do get a 100 fold speed increase. -- http://mail.python.org/mailman/listinfo/python-list
Re: Python vs. Lisp -- please explain
[EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] In learning Python I've read more about Lisp than when I was actually trying to learn it, and it seems that the two languages have lots of similarities: http://www.norvig.com/python-lisp.html I'm wondering if someone can explain to me please what it is about Python that is so different from Lisp that it can't be compiled into something as fast as compiled Lisp? From this above website and others, I've learned that compiled Lisp can be nearly as fast as C/C++, In order to be that fast, some of the dynamism of intepreted Lisp must be given up. In particular object code is not list data. Python with type-dynamism eliminated can also be translated to decent C/C++ and then compiled. See PyRex and Weave. There is also Psyco, which I believe translates directly to machine code. so I don't understand why Python can't also eventually be as efficient? Is there some *specific* basic reason it's tough? Or is it that this type of problem in general is tough, and Lisp has 40+ years vs Python's ~15 years? Yes, *much* more work has gone into Lisp than Python. (At least 10x, I am sure. and maybe up to 100x) During the 1980s, there was a Lisp/AI boom/bust something like the dot.com boom/bust of the last 1990s with perhaps a billion invested in Lisp/AI companies. I presume some of that went into Lisp itself (as opposed to AI applications thereof). Terry Jan Reedy -- http://mail.python.org/mailman/listinfo/python-list
Re: aborting without killing the python interpreter
correction Terry Reedy [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] How? In the standard interpreter, 'exit' is bound to the string 'Use Ctrl-Z plus Return to exit.' This is, of course, Windows specific. Other systems have other strings. -- http://mail.python.org/mailman/listinfo/python-list
Any Tkinker bases rich text widget?
Hi all I am using the standard python GUI Tkinter as my program's main interface. Although I know wxPython has some widget to support rich text widget, but I do not have time to shift to wx series. Does anyone know any Tkinter based widget that support: 1. Blod, Italic, Underline and their combinations. 2. Several most commonly used fonts, like Times New Roman and Arial 3. Multiline text 4. Cross platform support. Available in Linux-RedHat and Mac OS series and Windows 2000 or above. 5.Image embedding. Support jpeg, gif, bmp. The more the better. and better support: Hyperlink, Text color, the more the better. Thank you so much for help! -- http://mail.python.org/mailman/listinfo/python-list
