Re: how to finish a while loop...
On Feb 20, 3:42 am, richie [EMAIL PROTECTED] wrote: On Feb 20, 9:35 am, icarus [EMAIL PROTECTED] wrote: To the original poster what environment are you running this in? Linux. Xubuntu if that matters. When I put your program in notepad and run it from the windows command prompt it works. yeah yeah...same here. After I got the tip that it actually worked, I went into the eclipse directory where the program lives, ran it there from the shell, and it worked. Meaning, I didn't modify anything on the file itself (by accident or on purpose). But when I paste it into eclipse and run it eclipse's console, it doesn't work because answer seems to have a stray '\r' carriage return (CR) and therefore the comparison to 'no' fails. I get no 'compile' errors there. I get regular execution but it just doesn't change the condition to False at the very end. Therefore it loops forever. I used other values like zeros and ones to make sure I could print the values when the interpreter got down to that line. Everything checked. Just didn't change the condition on the main loop. I've changed this code a little. condition = True while ( condition ): try: integer_one = int ( raw_input( Please enter an integer: ) ) integer_two = int ( raw_input( Please enter the second integer: ) ) division = integer_one / integer_two except( ZeroDivisionError ): print \nDivision by zero detected except( ValueError ): print \nYou didn't enter an integer else: print The result is, division answer = raw_input(Do you want to try again (yes or no)? ) print answer #answer=no if answer == yes: condition=True elif answer == no: condition=False print Good bye, you don't want to continue print condition And i got this result in eclipse3.2: Please enter an integer: 8 Please enter the second integer: 4 The result is 2 Do you want to try again (yes or no)? no no Good bye, you don't want to continue True Please enter an integer: it seems the input no in eclipse's console to answer won't equal the no we compare. And when I remove the comment and I get this result: Please enter an integer: 8 Please enter the second integer: 4 The result is 2 Do you want to try again (yes or no)? no no Good bye, you don't want to continue False strip and lowercase your answer for better comparison checking. -- http://mail.python.org/mailman/listinfo/python-list
Re: What's the standard for code docs?
Are people really writing pure HTML snippets in docstrings to document each module/class/method? For anything other than a toy project? One of the main reasons I'm considering moving to epydoc + reST is precisely because it's very un-HTML. Mind you I want to be able to produce HTML format docs from the source, but I don't want to actually *put* HTML anywhere near my precious sources. In the Java-world it *is* pure HTML snipplets... but no, not in python. Diez -- http://mail.python.org/mailman/listinfo/python-list
Why the result same as before modifing py files
In my C++ program ,python is embeded . I import One module(py file) and execute some functions .Then I modify py files in order to modify func parameters when process is still running .I import the module and execute functions again.But I find the result is same as before -- http://mail.python.org/mailman/listinfo/python-list
Re: What's the standard for code docs?
On Feb 15, 10:59 am, Preston Landers [EMAIL PROTECTED] wrote: Hey guys and gals. What are all the cool kids using these days to document their code? My goal is to create in-line documentation of each package/module/class/method and create some semi-nice looking (or at least usable) packaged documentation from it, in HTML and/or PDF format. I've been using effbot's PythonDoc for a while, but it seems like the new standard (if there is one) is docutils and restructured text (ReST.) Is that accurate? Just from glancing at some samples of ReST the actual format looks much easier to work with in plain text in the text editor. PythonDoc has not been very popular with my team due to its HTML-ish nature and I think ReST will gain more acceptance. Of course I don't want to bother making the jump from PythonDoc to docutils if that project is somehow a dead end. thanks for any info or advice you can provide. Preston I use epydoc for pyparsing, and I really like the results. Just make sure that importing your modules doesn't really do anything substantial (like connect to db's, or run unit tests that run for hours); epydoc imports your code and then introspects it to extract the classes, methods, docstrings, etc. (And I think you asked an honest question, and did not deserve the rude answers you got. This NG is normally better behaved.) -- Paul -- http://mail.python.org/mailman/listinfo/python-list
Re: Why must implementing Python be hard unlike Scheme?
[EMAIL PROTECTED] [EMAIL PROTECTED] writes: Does VM = interpreter? I think it means the bytecode interpreter. -- http://mail.python.org/mailman/listinfo/python-list
Re: distutils and data files
Sam Peterson wrote: I've been googling for a while now and cannot find a good way to deal with this. I have a slightly messy python program I wrote that I've historically just run from the extracted source folder. I have pictures and sound files in this folder that this program uses. I've always just used the relative path names of these files in my program. Lately, I had the idea of cleaning up my program and packaging it with distutils, but I've been stuck on a good way to deal with these resource files. The package_data keyword seems to be the way to go, but how can I locate and open my files once they've been moved? In other words, what should I do about changing the relative path names? I need something that could work from both the extracted source folder, AND when the program gets installed via the python setup.py install command. This seems to be a classic distutils question: how a python module can access to data files *after* being installed? The following thread addresses this issue: http://www.gossamer-threads.com/lists/python/python/163159 Carl Banks' solution seems to overcome the problem: his trick is to generate an additional configuration module with the relevant informations from the distutil data structure. However it is quite an old thread (2003) and I don't know if there has been progress made since then, maybe the distutils module now incorporates a similar mechanism. Hope it helps, RB -- http://mail.python.org/mailman/listinfo/python-list
Re: What's the standard for code docs?
On Feb 20, 9:12 am, Diez B. Roggisch [EMAIL PROTECTED] wrote: Are people really writing pure HTML snippets in docstrings to document each module/class/method? For anything other than a toy project? One of the main reasons I'm considering moving to epydoc + reST is precisely because it's very un-HTML. Mind you I want to be able to produce HTML format docs from the source, but I don't want to actually *put* HTML anywhere near my precious sources. In the Java-world it *is* pure HTML snipplets... but no, not in python. Diez Doxygen is your friend! -- http://mail.python.org/mailman/listinfo/python-list
Re: Double underscores -- ugly?
Then again, what's stopping us just using a single leading underscore? Nobody calls their own private methods _init or _add You must be looking at different code from the rest of us. A single leading underscore on the name *is* the convention for this attribute is not part of the external interface, which is about as private as Python normally gets. Yeah, I understand that. I meant -- and I could be wrong -- that I haven't seen people creating a method called init with a single leading underscore. It's too similar to __init__, so they would use some other name. In other words, defining _init to mean what __init__ now means probably wouldn't cause name conflicts. -Ben -- http://mail.python.org/mailman/listinfo/python-list
Adding more warnings
I tend to make a lot of mistakes of misspelled variable names. Is it possible to make python warn me about those at compile time? Very few times I use dynamic variable initialization. I can live with getting a warning for those as well. -- Best Regards, Med Venlig Hilsen, Thomas -- http://mail.python.org/mailman/listinfo/python-list
Re: Adding more warnings
Thomas Dybdahl Ahle [EMAIL PROTECTED] writes: I tend to make a lot of mistakes of misspelled variable names. You would greatly benefit from using tools like 'pyflakes', 'pylint', and a unit test suite for your code. They're very good for finding such simple bugs in your code. Is it possible to make python warn me about those at compile time? The names are resolved at run time, so the compiler has insufficient information to say whether a name is used incorrectly. -- \Program testing can be a very effective way to show the | `\presence of bugs, but is hopelessly inadequate for showing | _o__) their absence. -- Edsger Dijkstra | Ben Finney -- http://mail.python.org/mailman/listinfo/python-list
Re: Double underscores -- ugly?
Please preserve attribution lines on the quoted material, so we can see who wrote what at each level. benhoyt [EMAIL PROTECTED] writes: Then again, what's stopping us just using a single leading underscore? Nobody calls their own private methods _init or _add You must be looking at different code from the rest of us. A single leading underscore on the name *is* the convention for this attribute is not part of the external interface, which is about as private as Python normally gets. Yeah, I understand that. I meant -- and I could be wrong -- that I haven't seen people creating a method called init with a single leading underscore. It's too similar to __init__, so they would use some other name. In other words, defining _init to mean what __init__ now means probably wouldn't cause name conflicts. But it would conflict with the existing conventions. '_init' as a name indicates that it's *not* treated specially, because it's not named with double-underscores. Since it *is* treated specially by Python, it would be confusing not to follow the convention for naming such attributes. -- \ I know you believe you understood what you think I said, but I | `\ am not sure you realize that what you heard is not what I | _o__) meant. -- Robert J. McCloskey | Ben Finney -- http://mail.python.org/mailman/listinfo/python-list
Re: The big shots
On Tue, 2008-02-19 at 13:48 -0800, [EMAIL PROTECTED] wrote: OH YEAH. Color me absent-minded. File under No, they're not compiled. I'd ask what you're trying to say here if I had any hope of understanding the answer. It is becoming clear to me that I am not worthy of communicating with you. Best regards, -- Carsten Haese http://informixdb.sourceforge.net -- http://mail.python.org/mailman/listinfo/python-list
Re: firefox cache Python
Searching for FF automation but still no luck. Any other idea on how to locate the cache directory and then read the directory ? regards, Subeen http://love-python.blogspot.com/ On Feb 20, 3:20 am, Gabriel Genellina [EMAIL PROTECTED] wrote: Search for firefox automation -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list
Re: Why the result same as before modifing py files
zaley wrote: In my C++ program ,python is embeded . I import One module(py file) and execute some functions .Then I modify py files in order to modify func parameters when process is still running .I import the module and execute functions again.But I find the result is same as before 'import' is cached. If do want Python to re-import a module just call reload(module.) -- Helmut Jarausch Lehrstuhl fuer Numerische Mathematik RWTH - Aachen University D 52056 Aachen, Germany -- http://mail.python.org/mailman/listinfo/python-list
Re: Linux/Python Issues
[EMAIL PROTECTED] a écrit : Paul Boddie wrote: The whole CNR stuff and the proprietary software slant of Linspire obscures the solution, in my opinion. Thanks for all your help, Paul. CNR, which is now free, is absolutely marvelous when it's got what you need. If Python2.5 were in the warehouse, I'd have clicked, gone to make a cup of coffee and the appropriate icon would be on my desktop when I came back. If I were Python.org I'd not consider anything ready for release until it was in the warehouse. It's not the project's team duty to build specific packages for each and every possible platform / distro / package manager. Debian, Unbuntu, Mandriva, RedHat, Gentoo etc all build their own specific packages for the projects they want to be part of their distro. Bad luck you choose a distro that doesn't do a proper job here. May I suggest you give Ubuntu a try ? You might find it very welcoming to outsiders !-) -- http://mail.python.org/mailman/listinfo/python-list
Re: Current Fastest Python Implementation?
[EMAIL PROTECTED] wrote: On Feb 18, 9:37 am, Stefan Behnel [EMAIL PROTECTED] wrote: samuraisam wrote: Has anyone done any recent testing as to which current python implementation is the quickest? Search for a recent thread on CPython and IronPython. Perhaps for Django development - though the current one certainly is fast (and I doubt micro optimizations would make much difference in overall performance). Regardless - have those pypy folks made a faster implementation, or the jython folks? Or the .NET implementation? Depends on your use case. Take your application, do some benchmarking and use the implementation that turns out to be a) most reliable and b) the fastest. In that order. That's very good advice. Basically all four of those Python implementations have situations where they are faster than all the others. I guess CPython (possibly using Psyco) is still faster in many cases, but it really depends on your application. PyPy [http://codespeak.net/pypy/dist/pypy/doc/home.html] is getting progressively faster. This is true – PyPy is slowly getting faster. We have two students working explicitly on speed right now: Anto Cuni is doing a phd thesis on speeding up PyPy's Python interpreter when compiled to .NET and I am doing a Master thesis on improving the JIT of PyPy. In fact for certain things it can be faster than C [http:// morepypy.blogspot.com/2008/01/rpython-can-be-faster-than-c.html]! This link is misleading, since it is about the speed of RPython when translated to C, not normal Python programs. Normal Python programs tend to be not RPython, so that figure is hardly interesting. However it seems it still has a way to go to be fully operational! Still looks like the future to me. Cheers, Carl Friedrich Bolz -- http://mail.python.org/mailman/listinfo/python-list
Re: ANN: Phatch = PHoto bATCH processor and renamer based on PIL
On Feb 19, 1:19 pm, Steve Holden [EMAIL PROTECTED] wrote: Perhaps you could put a link to the source on the Windows instalL page? I don't mind being a second-class citizen, but it's annoying to have to jump around like that. It is an open wiki, but I changed it. I am a bit reluctant as the only website which is fixed now is http://photobatch.stani.be and all other parts (dedibox, wikidot) might change once I've got the time to build my own website. So those references run the risk of being outdated in the future. Looks like a nice piece of work. Thanks, have a nice day! Stani -- http://mail.python.org/mailman/listinfo/python-list
Re: how to finish a while loop...
icarus a écrit :
Hi all, i'm new to python. Learning on my own how to ask a user to
finish a loop or not.
For some reason, it behaves as infinite loop although I changed its
condition. Please tell me what I'm doing wrong. Thanks in advance.
Problem mostly solved, so I'll just comment a bit on the code:
condition = True
while ( condition ):
You don't need the parens here
while condition:
try:
integer_one = int ( raw_input( Please enter an
integer: ) )
integer_two = int ( raw_input( Please enter the
second integer: ) )
division = integer_one / integer_two
except( ZeroDivisionError ):
You don't need (nor want) the parens here:
except ZeroDivisionError:
print \nDivision by zero detected
except( ValueError ):
idem.
Also, the user will have to start over (ie: re enter 2 integers) if it
fails the second time.
print \nYou didn't enter an integer
else:
print The result is, division
answer = raw_input(Do you want to try again (yes or
no)? )
if answer == 'yes':
condition
This line is basically a noop. You don't need this part of the branch.
elif answer == 'no':
condition = False
This could be rewritten as:
if answer == 'no':
condition = False
which is a very verbose way to say:
condition = (answer != 'no')
print Good bye, you don't want to continue
here's a possible rewrite:
class DecodeError(RuntimeError):
pass
def nodecode(val):
return val
def decodeint(val):
try:
return int(val)
except ValueError:
raise DecodeError(%s is not an integer % val)
YESNO={'yes':True,'y':True,'no':False,'n':False}
def decodeyesno(val):
try:
return YESNO[val.strip().lower()]
except KeyError:
raise DecodeError(please answer 'yes' or 'no')
def read_input(prompt, decode=nodecode):
while True:
val = raw_input(prompt)
try:
return decode(val)
except DecodeError, e:
print e
def main():
run = True
while run:
integer_one = read_input(Please enter an integer: , decodeint)
integer_two = read_input(
Please enter the second integer: ,
decodeint
)
try:
division = integer_one / integer_two
except ZeroDivisionError:
print Division by zero detected
else:
print The result is, division
run = read_input(
Do you want to try again (yes or no)? ,
decodeyesno
)
print Good bye, you don't want to continue
if __name__ == '__main__':
main()
--
http://mail.python.org/mailman/listinfo/python-list
Re: ANN: Phatch = PHoto bATCH processor and renamer based on PIL
Wolfgang Strobl news2 at mystrobl.de writes: Steve Holden steve at holdenweb.com wrote: RTFM: the web site instructions clearly state that setup.py doesn't currently work with Windows. Do they? http://photobatch.stani.be/ doesn't, following documentation http://photobatch.stani.be/ doesn't, either. Strange. If you follow documentation on http://photobatch.stani.be you get on the documentation website, where there are clearly links to install. I missed start phatch in trunk/phatch while browsing through the web site, though. Not finding any specific instructions in README and finding no INSTALL at all, I expected setup.py to work on any platform. For the next release I added a remark in README. I hope that helps. I strongly advise you to read the tutorials: http://photobatch.wikidot.com/tutorials (for your convenience one of them is even translated in german, feel free to translate the other one) Thans to Frédéric, there is now a tutorial for writing your own actions with PIL (no knowledge of wxpython needed): http://photobatch.wikidot.com/writing-actions Also to understand fully how variables work in Phatch for filenames and folders: http://photobatch.wikidot.com/variables As a general note, the documentation website is an open wiki, so feel free to improve or contribute (eg how to install Phatch on Windows ;-) ). -- http://mail.python.org/mailman/listinfo/python-list
Re: The big shots
Sergio Correia wrote: I don't get this thread. At all. I want my 15 minutes back. I think it's a sort of Turing test, to fine-tune some spammer's text generating algorithm. -- http://mail.python.org/mailman/listinfo/python-list
Re: ANN: Phatch = PHoto bATCH processor and renamer based on PIL
Fred Pacquier xnews2 at fredp.lautre.net writes: Steve Holden steve at holdenweb.com said : Perhaps you could put a link to the source on the Windows instalL page? I don't mind being a second-class citizen, but it's annoying to have to jump around like that. I'm interested too, and was also wondering if Phatch is as full-featured unders Windows as under Linux, specifically the EXIF/IPTC functions made available through pyexiv2 : exiv2 itself seems to discriminate between the two, the Windows package only has the executable, not the library. Even without python-pyexiv2 Phatch features read-only EXIF support thanks to PIL. So you can name your files or write data stamps (date, aperature, velocity, ...) based on EXIF information. If you want to save EXIF and IPTC information to files you need python-pyexiv2. From its website: However, the library and all the tools used are cross-platform, so very little tweaking should be needed to get it to work fine on Windows or MacOS X. http://tilloy.net/dev/pyexiv2/developers.htm The exiv2 website says: The Windows package only contains the command line utility exiv2.exe (statically linked), manpage and a sample command file; get the source and doc packages for the library, documentation and other tools. http://www.exiv2.org/download.html So maybe someone can compile it. But... Phatch is designed with flexibility in mind. If someone can point me to a free python library for Windows for EXIF and other metadata, I'll be happy to integrate support for it in Phatch. Ideas anyone? Or you could write a python wrapper around the executable. Stani -- Phatch - http://photobatch.stani.be SPE - http://pythonide.stani.be -- http://mail.python.org/mailman/listinfo/python-list
Re: Double underscores -- ugly?
Ivan Illarionov wrote: I would like to see something like %init or init to be converted to __init__ behind the scenes. And $something to be converted to self.something. But, unfortunately, most Python people would consider this ugly just because Perl uses too much syntactic sugar and anything Perl-like is considered ugly in Python community. So, unless Perl die, I believe that Python will remain sugar-free. A good text editor allows you to replace text. Some of them can even do that for you with macros when you save a document or open it for editing (making it possible to go from $ to self and vice-versa). Maybe using another tool would solve your problem. -- http://mail.python.org/mailman/listinfo/python-list
Re: What's the standard for code docs?
On Tue, 19 Feb 2008 16:37:23 -0800, Preston Landers wrote: On Feb 19, 4:31 pm, [EMAIL PROTECTED] wrote: But after reading some of your other recent posts on other topics, I'm not confident that it was intended to make sense at all. Have a little bit patience, the bot is still in its early learning phase. ;-) Ciao, Marc 'BlackJack' Rintsch -- http://mail.python.org/mailman/listinfo/python-list
Re: Double underscores -- ugly?
Jason a écrit : (snip) Hmm. I must be the only person who doesn't think the double underscores are ugly. As far as I'm concerned, I just don't care if they are ugly or not - FWIW, I never ever think of them in terms of beauty or ugliness. What I do care about is that they simply and clearly convey a special meaning (just like the _single_leading_underscore names), and make sure you won't accidentaly override such a name. -- http://mail.python.org/mailman/listinfo/python-list
Re: Double underscores -- ugly?
benhoyt a écrit : (snip) Then again, what's stopping us just using a single leading underscore? Nobody calls their own private methods _init or _add I do. -- http://mail.python.org/mailman/listinfo/python-list
Re: Double underscores -- ugly?
benhoyt a écrit : Then again, what's stopping us just using a single leading underscore? Nobody calls their own private methods _init or _add You must be looking at different code from the rest of us. A single leading underscore on the name *is* the convention for this attribute is not part of the external interface, which is about as private as Python normally gets. Yeah, I understand that. I meant -- and I could be wrong -- that I haven't seen people creating a method called init with a single leading underscore. Can you see me ? It's too similar to __init__, so they would use some other name. Nope. It's perfect for a template method that is supposed to be called from the parent's class __init__. In other words, defining _init to mean what __init__ now means probably wouldn't cause name conflicts. It would. What you obviously fail to understand is that the __magic_name__ convention is here to clearly separate language implementation space from user space. Your suggestion would break this. -- http://mail.python.org/mailman/listinfo/python-list
Re: The big shots
On 20/02/2008, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: My point was, that if someone is trying to make friends, and either failing or forgetting success, then call a social worker. Or, reach out. That's the reason why you are often ignored, Castironpi. That point has no place on this mailing list. We are here to discuss Python, not social problems and their solutions. By the way, you may have noticed that you have been mostly replying to your own posts here in c.l.py, which indicates that the lack of It. It what?!? Dotan Cohen http://what-is-what.com http://gibberish.co.il א-ב-ג-ד-ה-ו-ז-ח-ט-י-ך-כ-ל-ם-מ-ן-נ-ס-ע-ף-פ-ץ-צ-ק-ר-ש-ת A: Because it messes up the order in which people normally read text. Q: Why is top-posting such a bad thing? -- http://mail.python.org/mailman/listinfo/python-list
Automating GUI interaction with Python
Hi, Is there a python library or bindings to a library in some other language for automating GUI interaction (the kind of functionality provided by Autoit for instance). What I need to do is very simple GUI automation : moving the mouse cursor to and from specified screen coordinates, clicking, etc. Thanks a lot. -- http://mail.python.org/mailman/listinfo/python-list
Re: The big shots
On 20/02/2008, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: On Feb 19, 5:31 pm, Diez B. Roggisch [EMAIL PROTECTED] wrote: May I insist? By the criteria you've mentioned so far, nothing rules out 'ext'. If it's still a bad idea, there's a reason. What is it? You imply that just because something is somehow working and even useful for a *some* people (some being maybe only you) that it would be worth including in the python standard lib. It is not. There are no really formal rules for inclusion, but these are certainly rules of thumb that are being considered: - is it useful for *a lot of people* - will it be mantained and maintainable for ever once it is part of the standard distribution - does it introduce external dependencies? If yes, this must be *very* carful considered. - is the design well-thought and mature - does it make sense tying the release cycle of python the cycle of the new lib And insulting the people who do work on python and do a marvellous job doing so is certainly *not* helping. Diez I don't know quite how to handle your reply. Counterexamples are already in. Shall I add this to the list: - is someone's favorite? No, that is not reason to include something in the standard libraries. You all know the allegory of the Apes and the Fire Hose. But 'ext' is actually good. No, I don't. Does anybody else? Do you have these: - It would not get used by anyone - It is not useful to very many people - There is some concern it could not remain maintainable - It is neither well-thought out nor mature - It will not ever make sense to tie it in to the Python cycle ? If not, how about these: - It doesn't match the rest of the language - It's too cutting edge - It is too hard to handle - It would get out of hand really quickly - I can't control you anymore after I let it in - The functionality already exists per se - It is to the rest of the language as wires #3, #4, and #5 are to RCA cables What? Here, again, you talk of things that noone here necessarily understands. - HTML 4.01 is not an improvement over HTML 4.0 How is that relevant? ? If still not, how about these: - It hurts my feelings - It foils my revenge - I'd rather you toil meanially - Tedious is good - You shouldn't have power - But I'm greedy - We can't afford it That's trolling. You are about a picometer from my killfile. Dotan Cohen http://what-is-what.com http://gibberish.co.il א-ב-ג-ד-ה-ו-ז-ח-ט-י-ך-כ-ל-ם-מ-ן-נ-ס-ע-ף-פ-ץ-צ-ק-ר-ש-ת A: Because it messes up the order in which people normally read text. Q: Why is top-posting such a bad thing? -- http://mail.python.org/mailman/listinfo/python-list
Re: Double underscores -- ugly?
So people's problem with __word__ is that it is not very readable? How so, it stands out on page, it clearly is different from other objects and doesn't abuse other symbols that generally have a meaning based on their use. I haven't seen a single alternative that really stands out as much as __word__ does. -- http://mail.python.org/mailman/listinfo/python-list
RE: Automating GUI interaction with Python
On Behalf Of jorma kala Is there a python library or bindings to a library in some other language for automating GUI interaction (the kind of functionality provided by Autoit for instance). What I need to do is very simple GUI automation : moving the mouse cursor to and from specified screen coordinates, clicking, etc. Thanks a lot. For Windows, try pyWinAuto http://pywinauto.openqa.org/ Regards, Ryan Ginstrom -- http://mail.python.org/mailman/listinfo/python-list
help others or
help others or guide others or love others . ** http://cellbiologystructural.blogspot.com/ ** -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Memory Manager
Jeff Schwab wrote: What's the Intel architecture? Do you mean the x86_64 architecture that was actually developed by AMD, or x86 for x some number, or do you actually mean IA64? I mean chips of the family that goes back to the 8086 and 8088 chips, chips that support the REPZ prefix to the MOVSW instruction. -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Memory Manager
[EMAIL PROTECTED] writes: I mean chips of the family that goes back to the 8086 and 8088 chips, chips that support the REPZ prefix to the MOVSW instruction. repz movsw is a pretty lame way to copy data on current x86's. Use XMM instead. -- http://mail.python.org/mailman/listinfo/python-list
Re: Double underscores -- ugly?
[EMAIL PROTECTED] writes: So people's problem with __word__ is that it is not very readable? No, the complaint seems to be that it's ugly. -- \ [T]he speed of response of the internet will re-introduce us | `\to that from which our political systems have separated us for | _o__) so long, the consequences of our own actions. -- Douglas Adams | Ben Finney -- http://mail.python.org/mailman/listinfo/python-list
Article of interest: Python pros/cons for the enterprise
This is part of a series examining the strengths and weaknesses of various scripting languages, with particular attention to enterprise (read: big company) use. You Used Python to Write WHAT? Python is a powerful, easy-to-use scripting language suitable for use in the enterprise, although it is not right for absolutely every use. Python expert Martin Aspeli identifies when Python is the right choice, and when another language might be a better option. http://www.cio.com/article/185350 -- http://mail.python.org/mailman/listinfo/python-list
Re: Double underscores -- ugly?
On Wed, 20 Feb 2008 03:12:39 -0800, cokofreedom wrote: So people's problem with __word__ is that it is not very readable? How so, it stands out on page, it clearly is different from other objects and doesn't abuse other symbols that generally have a meaning based on their use. I haven't seen a single alternative that really stands out as much as __word__ does. My only two gripes about double underscore names are that: (1) My news reader interprets _X_ as underline X, which leads to ugly display. I could turn that feature off, but that would mean losing *X* bold X, which I like. (2) Two underscores __ is insufficiently visually different from a single underscore _. Choosing a good font reduces the problem, but doesn't make it go away. However, these are minor gripes. On a scale of 0 to -9, where 0 is it doesn't upset me or please me at all and -9 is I'd rather die than live with this one more minute, these gripes are both about a -2, and far out- weighed by the advantages. Taking the advantages and the disadvantages both into account, I give it a total score of about +4. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
threaded http server
hi i want to create fast n efficient http server which serve multiple client concurrently .. so i thought of threading the http server using class HTTPServer(SocketServer.ThreadingMixIn, BaseHTTPServer.HTTPServer): pass: as this creates an threaded version of http server ... but i read in one of the postings in mailing list that it will create a deadlock . the following postings can found at http://mail.python.org/pipermail/python-list/2001-January/064088.html as mentioned in that posting log_request must be redefined... can any one tell me how to redefine it so that it creates a threading behavior for fast n efficient http server. or will it be ok just to pass the definition as done in the posting mentioned above and still create an efficient threading behavior -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Memory Manager
Paul Rubin wrote: repz movsw is a pretty lame way to copy data on current x86's. Use XMM instead. Thank you, Paul. I'm pretty sure you meant MMX, Multi-Media eXtensions. Paul's just told me to upgrade my 32-bit thinking to use newer 64-bit registers, even on a 32-bit cpu. Please divide my prior timings by two. Pentium or later required. -- http://mail.python.org/mailman/listinfo/python-list
Re: The big shots
On 20/02/2008, Marco Mariani [EMAIL PROTECTED] wrote: Sergio Correia wrote: I don't get this thread. At all. I want my 15 minutes back. I think it's a sort of Turing test, to fine-tune some spammer's text generating algorithm. You mean this: http://science.slashdot.org/article.pl?sid=07/12/09/1356201 You've probably right! Dotan Cohen http://what-is-what.com http://gibberish.co.il א-ב-ג-ד-ה-ו-ז-ח-ט-י-ך-כ-ל-ם-מ-ן-נ-ס-ע-ף-פ-ץ-צ-ק-ר-ש-ת A: Because it messes up the order in which people normally read text. Q: Why is top-posting such a bad thing? -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Memory Manager
Steve Holden wrote: You have a strange idea of nearly free ... Extending an integer array from 100 to 150 items is a pretty puny operation when you compare it with the amount of data that might need to be moved during a compactifying garbage collection of a 20MB Python program image. 20 MBs = 5 M 32-bit words = 1.25 millis to move half of them on a 2GHz machine. Don't know how much a milli costs where you live. -- http://mail.python.org/mailman/listinfo/python-list
Re: The big shots
On 20/02/2008, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: I'm going to start marking my subjective comments with a star, so it's clear what is emperically verifiable, and what is not. An ascii star? You do realize that email is a text medium, no? It's a bad sign. If you aren't keeping your thoughts to yourself, and thrashing about the world for a peer, a social network, a support group, or a community, then you missed the day in grammar school when they were handing out smiles. But they're not handing them out anymore. You talk in analogies. I don't understand them. I do not know Spanish, and maybe if I knew both Spanish and your local customs, I would understand your analogies. But as a Hebrew-speaking middle easterner, I don't. Even on my emperical claims, I'm wrong 90% of the time. On the subjective ones, I'm not only wrong that much, but no one else want to hear, or even can verify them. Smell's fine to me. I don't have time for 10% right. I cannot go verify everything that you think out loud because 10% might be true. No matter how it smells to you. Emotions are prejudiced; and even in my own concrete thoughts, I will misidentify myself with another, and others with me. When I say I, I mean you. I believe that text was reworded for the final draft of Through the Looking Glass. French and Spanish have impersonal pronouns: on and se, respectively. In English, they often come out as, we, they, and you a lot, on occasion a one, and sometimes, even, I. In Hebrew, we have 8 different words for you. That does not affect my English communications, however. Dotan Cohen http://what-is-what.com http://gibberish.co.il א-ב-ג-ד-ה-ו-ז-ח-ט-י-ך-כ-ל-ם-מ-ן-נ-ס-ע-ף-פ-ץ-צ-ק-ר-ש-ת A: Because it messes up the order in which people normally read text. Q: Why is top-posting such a bad thing? -- http://mail.python.org/mailman/listinfo/python-list
Re: Double underscores -- ugly?
On Tue, 19 Feb 2008 21:50:33 -0800, Ivan Illarionov wrote:
I would like to see something like %init or init to be converted to
__init__ behind the scenes.
Unfortunately -- or perhaps fortunately -- % clashes with the already
established uses of % as the modulus operator for numbers and the
interpolation operator for strings.
5 % 3
2
hello %s % world
'hello world'
The last thing I want is to have to study code carefully to try to work
out whether %name means __name__ or %name.
Similarly for , the bitwise and operator:
9 12
8
And $something to be converted to self.something.
Well, at least $ is unused in Python at the moment. That's a point in the
idea's favour. It's a tiny point, but a point.
But, unfortunately, most Python people would consider
this ugly
Yes.
just because Perl uses too much syntactic sugar
No. It's because Perl uses too much *line noise*, punctuation characters
instead of syntax.
and anything
Perl-like is considered ugly in Python community. So, unless Perl die, I
believe that Python will remain sugar-free.
Python has lots of syntactic sugar. Some examples:
class Foo is syntactic sugar for a call to the new.classobj() function.
Both def foo(): and lambda : are syntactic sugar for a call to the
new.function() function.
Double-underscore method names are syntactic sugar.
Decorators are syntactic sugar.
Generator expressions and list comprehensions are syntactic sugar.
Dict, tuple and list literals {a: b} (a, b) [a, b] are syntactic sugar.
Method calls and method definitions are syntactic sugar.
The trinary if operator x if flag else y is syntactic sugar.
Most of these have been part of Python since the earliest days. Some of
them, like method calls, are so established in Python and other languages
that it's hard to remember that they could be done another way, without
syntax support, but of course they could be:
# instance.method(arg)
getattr(instance, 'method')(arg)
Python uses relatively little punctuation. That's one of the strengths of
the language, and why its very unlikely that your suggestions will be
implemented in Python.
--
Steven
--
http://mail.python.org/mailman/listinfo/python-list
Re: What's the standard for code docs?
On 20 Feb, 09:32, Paul McGuire [EMAIL PROTECTED] wrote: I use epydoc for pyparsing, and I really like the results. Just make sure that importing your modules doesn't really do anything substantial (like connect to db's, or run unit tests that run for hours); epydoc imports your code and then introspects it to extract the classes, methods, docstrings, etc. Or use the --parse-only option to avoid the introspection. (And I think you asked an honest question, and did not deserve the rude answers you got. This NG is normally better behaved.) Indeed. Paul -- http://mail.python.org/mailman/listinfo/python-list
is this data structure build-in or I'll have to write my own class?
I need a data structure that will let me do: - attribute access (or index) - maintain the order (for iter and print) - be mutable. in case there isn't one. I was thinking having a base class like Bunch http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52308 and on top of that keeping a list of the keys and pop/push to the list when adding/deleting items. I don't like this idea because I'll have to keep each key twice. (in the list and in __dict__, is this the only way of doing it? -- http://mail.python.org/mailman/listinfo/python-list
Re: is this data structure build-in or I'll have to write my own class?
Jorge Vargas napisał(a): - attribute access (or index) - maintain the order (for iter and print) - be mutable. These are all attributes of standard Python lists. in case there isn't one. I was thinking having a base class like Bunch http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52308 and on top of that keeping a list of the keys and pop/push to the list when adding/deleting items. I don't like this idea because I'll have to keep each key twice. (in the list and in __dict__, is this the only way of doing it? What is your objective? From the description of this recipe I cann't get your use case. -- Jarek Zgoda Skype: jzgoda | GTalk: [EMAIL PROTECTED] | voice: +48228430101 We read Knuth so you don't have to. (Tim Peters) -- http://mail.python.org/mailman/listinfo/python-list
Re: threaded http server
bharath venkatesh wrote: hi i want to create fast n efficient http server which serve multiple client concurrently .. so i thought of threading the http server using class HTTPServer(SocketServer.ThreadingMixIn, BaseHTTPServer.HTTPServer): pass: as this creates an threaded version of http server ... but i read in one of the postings in mailing list that it will create a deadlock . the following postings can found at http://mail.python.org/pipermail/python-list/2001-January/064088.html as mentioned in that posting log_request must be redefined... can any one tell me how to redefine it so that it creates a threading behavior for fast n efficient http server. or will it be ok just to pass the definition as done in the posting mentioned above and still create an efficient threading behavior For fast and efficient, move away from any pofh te SocketServer based libraries immediately. Regard them more as proofs of concept, and simple models you can tinker with to improve your understanding. Twisted, TurboGears, Django, Zope - these and other frameworks have reasonably efficient ways to serve the web from Python. regards Steve -- Steve Holden+1 571 484 6266 +1 800 494 3119 Holden Web LLC http://www.holdenweb.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Memory Manager
[EMAIL PROTECTED] writes: Use XMM instead. Thank you, Paul. I'm pretty sure you meant MMX, Multi-Media eXtensions. MMX is the obsolete 64 bit predecessor to XMM. XMM encompasses 128 bit wide MMX-like integer instructions and several generations of SSE floating point ops. Main thing about it is that it's 128 bits wide and has instructions to get cache prefetches started now if you'll need them later. -- http://mail.python.org/mailman/listinfo/python-list
Re: is this data structure build-in or I'll have to write my own class?
2008/2/20 Jarek Zgoda [EMAIL PROTECTED]:
Jorge Vargas napisał(a):
- attribute access (or index)
- maintain the order (for iter and print)
- be mutable.
These are all attributes of standard Python lists.
probably I confused you with the or index part. I want to be able to
do item.value1 or item['value1'] the list can't do this.
in case there isn't one. I was thinking having a base class like Bunch
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52308 and on
top of that keeping a list of the keys and pop/push to the list when
adding/deleting items. I don't like this idea because I'll have to
keep each key twice. (in the list and in __dict__, is this the only
way of doing it?
What is your objective? From the description of this recipe I cann't get
your use case.
I got an xml object which feed me in data. in a simple format
item
propety1foo/propety1
value1bar/value1
propety2baz/propety2
value2bal/value2
/item
I want to turn this into a datastructure I can manipulate in my
program for example.
print myItem.property1
if myItem.property1[value1] 0:
print 'ok'
print myItem
{'property1':'value1','property2,'value2'}
--
Jarek Zgoda
Skype: jzgoda | GTalk: [EMAIL PROTECTED] | voice: +48228430101
We read Knuth so you don't have to. (Tim Peters)
--
http://mail.python.org/mailman/listinfo/python-list
--
http://mail.python.org/mailman/listinfo/python-list
Re: is this data structure build-in or I'll have to write my own class?
subeen: I think you should go for 'dictionary' that is a built-in data structure of Python. The OP asks this too: maintain the order (for iter and print) So I think an ordered dict is fitter, the op can search for an odict implementation, in the cookbook too (I too have written one, but it's useful only if you have to delete keys often, because it's O(1) for that operation too, but generally slow if you don't need to delete keys too). Bye, bearophile -- http://mail.python.org/mailman/listinfo/python-list
Re: is this data structure build-in or I'll have to write my own class?
I think you should go for 'dictionary' that is a built-in data
structure of Python.
regards,
Subeen
http://love-python.blogspot.com/
On Feb 20, 7:32 pm, Jorge Vargas [EMAIL PROTECTED] wrote:
2008/2/20 Jarek Zgoda [EMAIL PROTECTED]: Jorge Vargas napisa³(a):
- attribute access (or index)
- maintain the order (for iter and print)
- be mutable.
These are all attributes of standard Python lists.
probably I confused you with the or index part. I want to be able to
do item.value1 or item['value1'] the list can't do this.
in case there isn't one. I was thinking having a base class like Bunch
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52308and on
top of that keeping a list of the keys and pop/push to the list when
adding/deleting items. I don't like this idea because I'll have to
keep each key twice. (in the list and in __dict__, is this the only
way of doing it?
What is your objective? From the description of this recipe I cann't get
your use case.
I got an xml object which feed me in data. in a simple format
item
propety1foo/propety1
value1bar/value1
propety2baz/propety2
value2bal/value2
/item
I want to turn this into a datastructure I can manipulate in my
program for example.
print myItem.property1
if myItem.property1[value1] 0:
print 'ok'
print myItem
{'property1':'value1','property2,'value2'}
--
Jarek Zgoda
Skype: jzgoda | GTalk: [EMAIL PROTECTED] | voice: +48228430101
We read Knuth so you don't have to. (Tim Peters)
--
http://mail.python.org/mailman/listinfo/python-list
--
http://mail.python.org/mailman/listinfo/python-list
Re: is this data structure build-in or I'll have to write my own class?
dict doesn't maintains order.
a=[(3,2),(2,2)]
dict(a).items()
[(2, 2), (3, 2)]
a=[(3,2),(2,2)]
assert dict(a).items()==a
Traceback (most recent call last):
File stdin, line 1, in module
AssertionError
dict(a).items()
[(2, 2), (3, 2)]
On Feb 20, 2008 7:50 AM, subeen [EMAIL PROTECTED] wrote:
I think you should go for 'dictionary' that is a built-in data
structure of Python.
regards,
Subeen
http://love-python.blogspot.com/
On Feb 20, 7:32 pm, Jorge Vargas [EMAIL PROTECTED] wrote:
2008/2/20 Jarek Zgoda [EMAIL PROTECTED]: Jorge Vargas napisa³(a):
- attribute access (or index)
- maintain the order (for iter and print)
- be mutable.
These are all attributes of standard Python lists.
probably I confused you with the or index part. I want to be able to
do item.value1 or item['value1'] the list can't do this.
in case there isn't one. I was thinking having a base class like Bunch
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52308and on
top of that keeping a list of the keys and pop/push to the list when
adding/deleting items. I don't like this idea because I'll have to
keep each key twice. (in the list and in __dict__, is this the only
way of doing it?
What is your objective? From the description of this recipe I cann't get
your use case.
I got an xml object which feed me in data. in a simple format
item
propety1foo/propety1
value1bar/value1
propety2baz/propety2
value2bal/value2
/item
I want to turn this into a datastructure I can manipulate in my
program for example.
print myItem.property1
if myItem.property1[value1] 0:
print 'ok'
print myItem
{'property1':'value1','property2,'value2'}
--
Jarek Zgoda
Skype: jzgoda | GTalk: [EMAIL PROTECTED] | voice: +48228430101
We read Knuth so you don't have to. (Tim Peters)
--
http://mail.python.org/mailman/listinfo/python-list
--
http://mail.python.org/mailman/listinfo/python-list
--
http://mail.python.org/mailman/listinfo/python-list
Re: is this data structure build-in or I'll have to write my own class?
Jorge Vargas wrote: I need a data structure that will let me do: - attribute access (or index) - maintain the order (for iter and print) - be mutable. in case there isn't one. I was thinking having a base class like Bunch http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52308 and on top of that keeping a list of the keys and pop/push to the list when adding/deleting items. I don't like this idea because I'll have to keep each key twice. (in the list and in __dict__, is this the only way of doing it? Sounds like a good time to learn ElementTree (included in Python 2.5 but available for earlier versions). -Larry -- http://mail.python.org/mailman/listinfo/python-list
Re: Python seems to be ignoring my except clause...
Adam W. wrote:
I am trying to handle a Unicode error but its acting like the except
clause is not even there. Here is the offending code:
def characters(self, string):
if self.initem:
try:
self.data.append(string.encode())
except:
self.data.append('No habla la Unicode')
And the exception:
File C:\Users\Adam\Desktop\XMLWorkspace.py, line 65, in characters
try:
UnicodeEncodeError: 'ascii' codec can't encode character u'\u2026' in
position 83: ordinal not in range(128)
Its got to be something really dumb I'm missing, this make no sence.
Seems that others have addressed you specific problem so I wanted to take this
opportunity to save you from hours of frustration in the future (trust me on
this one). It is almost NEVER a good idea to use a blank except: clause in
your
code. The problem is that it catches ALL exceptions, not just the one you are
trying to catch. It is much better to determine the exception you are trying
to
catch here.
Example:
try:
self.data.append(string.encode())
except UnicodeEncodeError:
self.data.append('No habla la Unicode')
You can spend a lot of time trying to figure out what is going on when your
blank except catches all the exceptions. This lets the other exceptions do
what
they should do.
Hope this helps.
Larry Bates
--
http://mail.python.org/mailman/listinfo/python-list
Re: threaded http server
bharath venkatesh wrote: hi i want to create fast n efficient http server which serve multiple client concurrently .. so i thought of threading the http server using Threads ain't efficient for IO bound problems like a HTTP server. Most OSs have far better ways to deal with IO bound applications like select(), poll(), epoll(), kqueue() or IOCP. Use Twisted :) Christian -- http://mail.python.org/mailman/listinfo/python-list
Re: Article of interest: Python pros/cons for the enterprise
You Used Python to Write WHAT? http://www.cio.com/article/185350 Furthermore, the power and expressivity that Python offers means that it may require more skilled developers. [...down to the summary...] Python may not be an appropriate choice if you: [...] * Rely on teams of less-experienced programmers. These developers may benefit from the wider availability of training for languages like Java and are less likely to make mistakes with a compile-time, type-checked language. Oh noes! You might need competent programmers that actually understand what they're doing! (they might even have to write testing code to make sure their code works as intended...it's a good thing that Python includes unittest and doctest modules in the stock install) Sigh. Any programmer that can overcome the hurdles of learning Java or C# can quickly/easily pick up Python as long as they're willing to unlearn some bad habits. -tkc -- http://mail.python.org/mailman/listinfo/python-list
Re: is this data structure build-in or I'll have to write my own class?
Jorge Vargas [EMAIL PROTECTED] wrote: I was thinking having a base class like Bunch http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52308 and on top of that keeping a list of the keys and pop/push to the list when adding/deleting items. I don't like this idea because I'll have to keep each key twice You do realise I hope that just because the key appears in both a dictionary and a list doesn't mean you have two copies of the key? If the same object is used in a dictionary and a list then all you have is an extra reference to the same object. -- http://mail.python.org/mailman/listinfo/python-list
Re: Automating GUI interaction with Python
On Feb 20, 5:37 am, Ryan Ginstrom [EMAIL PROTECTED] wrote: On Behalf Of jorma kala Is there a python library or bindings to a library in some other language for automating GUI interaction (the kind of functionality provided by Autoit for instance). What I need to do is very simple GUI automation : moving the mouse cursor to and from specified screen coordinates, clicking, etc. Thanks a lot. For Windows, try pyWinAutohttp://pywinauto.openqa.org/ dogtail is another http://people.redhat.com/zcerza/dogtail/ ... Jay Graves -- http://mail.python.org/mailman/listinfo/python-list
Re: The big shots
On 2008-02-20, Marco Mariani [EMAIL PROTECTED] wrote: Sergio Correia wrote: I don't get this thread. At all. I want my 15 minutes back. I think it's a sort of Turing test, You're probably right, and I think I failed the test. -- Grant Edwards grante Yow! Am I in GRADUATE at SCHOOL yet? visi.com -- http://mail.python.org/mailman/listinfo/python-list
smtplib gnupg
Hello, at the moment my program sends mail with smtplib. Is there a chance to sign and/or encode/cipher this mails with GnuPG? If yes, does anyone have some sample code? Regards Bernd -- http://mail.python.org/mailman/listinfo/python-list
Re: is this data structure build-in or I'll have to write my own class?
On Feb 20, 7:32 am, Jorge Vargas [EMAIL PROTECTED] wrote: What is your objective? From the description of this recipe I cann't get your use case. I got an xml object which feed me in data. in a simple format item propety1foo/propety1 value1bar/value1 propety2baz/propety2 value2bal/value2 /item If it is XML why not use ElementTree or some other XML DOM library? ... Jay Graves -- http://mail.python.org/mailman/listinfo/python-list
Re: is this data structure build-in or I'll have to write my own class?
On Feb 20, 2008 8:15 AM, Larry Bates [EMAIL PROTECTED] wrote: Jorge Vargas wrote: I need a data structure that will let me do: - attribute access (or index) - maintain the order (for iter and print) - be mutable. in case there isn't one. I was thinking having a base class like Bunch http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52308 and on top of that keeping a list of the keys and pop/push to the list when adding/deleting items. I don't like this idea because I'll have to keep each key twice. (in the list and in __dict__, is this the only way of doing it? Sounds like a good time to learn ElementTree (included in Python 2.5 but available for earlier versions). I am using ET, to fetch the data from the XML, after that I want a plain python object. for the rest of the program. -Larry -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: Why must implementing Python be hard unlike Scheme?
On Feb 19, 11:22 pm, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: On Feb 19, 9:49 pm, Kay Schluehr [EMAIL PROTECTED] wrote: Building a Python VM in a high level language is certainly not harder than creating a Scheme interpreter. Does VM = interpreter? Are you saying implementing a toy Python interpreter is not any harder than implementing a toy Scheme interpreter? I don't understand why you think that. The Python grammar is much more complicated. Python ASTs are much more complicated. Parsing Python files with the whitespace is harder. Please prove me wrong. I hope you are right. Chris If you create a byte-code interpreter, you don't need to worry about the AST or whitespace. Python code compiles down into a byte-code that runs on a simple virtual machine. Values are put in a stack, then popped off the stack to perform operations. Jython compiles Python into the Java byte-code machine, while IronPython generates .NET / CLR byte codes. The dis module allows you to disassemble the byte-code instructions, at least for CPython. Take a look at http://docs.python.org/lib/ module-dis.html. (There's a link at the bottom to a page that describes what the byte-codes in CPython are.) You also don't have to jump directly to doing everything yourself. Python has modules that will already lex (module tokenize) and parse (module parser) the language, so you can use of the modules to focus on implementing the other module. Python is somewhat more difficult to parse because it isn't a functional language. While functional languages are easier to implement, they aren't as easy for the beginner or average programmer to use. I know how to work within the MFC and wxWidget/wxPython frameworks, but darned if I know how Scheme could be used to implement a COM object. Take a look at Shalabh Chaturvedi's Python Types and Objects [1]. This describes how Python's type and object objects work. Since this is the top of Python's new-style classes, getting this right is imperative. I hope this gives you some idea on how to proceed. Python's grammar really isn't that difficult. Python uses a LL parser [2], while many languages uses LALR parsers [3]. The parts of the BNF are described in detail in Python's Python Reference Manual [4]. I hope that the resources help. --Jason [1] Python Types and Objects: http://www.cafepy.com/article/python_types_and_objects/python_types_and_objects.html [2] LL Parsers: http://en.wikipedia.org/wiki/LL_parser [3] LALR Parsers: http://en.wikipedia.org/wiki/LALR_parser [4] Python Reference Manual: http://docs.python.org/ref/ref.html -- http://mail.python.org/mailman/listinfo/python-list
Handling locked db tables...
I have a db table that holds a list of ports. There is a column in_use that is used as a flag for whether the port is currently in use. When choosing a port the table is read and the first available port with in_use = 0 is used, updated to in_use = 1, used, then updated to in_use = 0. I am using MySQLdb and want to make sure I am locking the table when doing reads, writes, updates since there will be several instances of my program looking for available ports simultaneously. When I run a lock table mytable read I can do all of my transactions. But, when another cursor then tries to do the read I get an error unless the first process has been completed... unlocking the tables. How is this handled generally? Thanks. -- http://mail.python.org/mailman/listinfo/python-list
Re: smtplib gnupg
To the best of my knowledge, GNUPG acts upon the body of the message. If you think about it you should realize that the header of the message cannot be encrypted, as it will be handled by mail servers that have no knowledge of GNUPG or your encryption keys. I am further emboldened to make this assertion because the encryption takes place before the message is sent--that is, before the headers are completely formed. Brot wrote: Hello, at the moment my program sends mail with smtplib. Is there a chance to sign and/or encode/cipher this mails with GnuPG? If yes, does anyone have some sample code? Regards Bernd -- Shane Geiger IT Director National Council on Economic Education [EMAIL PROTECTED] | 402-438-8958 | http://www.ncee.net Leading the Campaign for Economic and Financial Literacy -- http://mail.python.org/mailman/listinfo/python-list
Re: Handling locked db tables...
On 2008-02-20 16:24, breal wrote: I have a db table that holds a list of ports. There is a column in_use that is used as a flag for whether the port is currently in use. When choosing a port the table is read and the first available port with in_use = 0 is used, updated to in_use = 1, used, then updated to in_use = 0. I am using MySQLdb and want to make sure I am locking the table when doing reads, writes, updates since there will be several instances of my program looking for available ports simultaneously. When I run a lock table mytable read I can do all of my transactions. But, when another cursor then tries to do the read I get an error unless the first process has been completed... unlocking the tables. How is this handled generally? This is normal database locking behavior. If you do an update to a table from one process, the updated row is locked until the transaction is committed. If another process wants to access that row (even if only indirectly, e.g. a select that does a query which includes the data from the locked row), that process reports a database lock or times out until the lock is removed by the first process. The reason is simple: you don't want the second process to report wrong data, since there's still a chance the first process might roll back the transaction. Most modern database allow row-level locking. I'm not sure whether MySQL supports this. SQLite, for example, only support table locking. -- Marc-Andre Lemburg eGenix.com Professional Python Services directly from the Source (#1, Feb 20 2008) Python/Zope Consulting and Support ...http://www.egenix.com/ mxODBC.Zope.Database.Adapter ... http://zope.egenix.com/ mxODBC, mxDateTime, mxTextTools ...http://python.egenix.com/ Try mxODBC.Zope.DA for Windows,Linux,Solaris,MacOSX for free ! eGenix.com Software, Skills and Services GmbH Pastor-Loeh-Str.48 D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg Registered at Amtsgericht Duesseldorf: HRB 46611 -- http://mail.python.org/mailman/listinfo/python-list
Re: The big shots
On Feb 19, 7:19 pm, [EMAIL PROTECTED] wrote: If not, how about these: - It doesn't match the rest of the language - It's too cutting edge - It is too hard to handle - It would get out of hand really quickly - I can't control you anymore after I let it in - The functionality already exists per se - It is to the rest of the language as wires #3, #4, and #5 are to RCA cables - HTML 4.01 is not an improvement over HTML 4.0 ? If still not, how about these: - It hurts my feelings - It foils my revenge - I'd rather you toil meanially - Tedious is good - You shouldn't have power - But I'm greedy - We can't afford it ? I think your tin foil hat may screwed on a wee bit tight. -- http://mail.python.org/mailman/listinfo/python-list
Re: What's the standard for code docs?
On Feb 20, 2:32 am, Paul McGuire [EMAIL PROTECTED] wrote: I use epydoc for pyparsing, and I really like the results. Just make sure that importing your modules doesn't really do anything substantial (like connect to db's, or run unit tests that run for hours); epydoc imports your code and then introspects it to extract the classes, methods, docstrings, etc. OK thanks for the advice. We already have a policy of not doing anything heavyweight on module import so in introspection wouldn't be a problem. (And I think you asked an honest question, and did not deserve the rude answers you got. This NG is normally better behaved.) Yeah I've been lurking a long time. I've noticed a strange uptick in weirdness lately. No clue why though. -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Memory Manager
[EMAIL PROTECTED] wrote: 20 MBs = 5 M 32-bit words = 1.25 millis to move half of them on a 2GHz machine. Don't know how much a milli costs where you live. A 2GHz machine doesn't have 20Mb of 2GHz memory. You made the mistake of measuring the speed of processor's cache, rather than the RAM. Ross Ridge -- l/ // Ross Ridge -- The Great HTMU [oo][oo] [EMAIL PROTECTED] -()-/()/ http://www.csclub.uwaterloo.ca/~rridge/ db // -- http://mail.python.org/mailman/listinfo/python-list
Re: threaded http server
hi, will this twisted,turbo gear etc help me to create a http server that can serve multiple clients concurrently and also the http server which i want to create in my project will not be doing any IO (it is not like frontend and backend ).. but it will act as a image_proxy_server i.e when a client wants an image it will do a http request to my http server if the image is present in cache it will fetch it directly from cache and return it to the client as an http reponse otherwise it fetch from www and store it cache and also return it to the client as an http response so basically i want to serve many clients concurrently in fast n efficient manner On Feb 20, 2008 5:51 AM, Christian Heimes [EMAIL PROTECTED] wrote: bharath venkatesh wrote: hi i want to create fast n efficient http server which serve multiple client concurrently .. so i thought of threading the http server using Threads ain't efficient for IO bound problems like a HTTP server. Most OSs have far better ways to deal with IO bound applications like select(), poll(), epoll(), kqueue() or IOCP. Use Twisted :) Christian -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: psycopg2: connect copy_from and copy_to
[EMAIL PROTECTED] schrieb: On Feb 19, 8:06 am, Thomas Guettler [EMAIL PROTECTED] wrote: Any suggestions? If you don't mind trying out some beta quality software, you can try my pg_proboscis driver. It has a DBAPI2 interface, but for you to use COPY, you'll need to use the GreenTrunk interface: Up to now I am happy with psycopg2. Why do you develop pg_proboscis? Thomas -- http://mail.python.org/mailman/listinfo/python-list
PEP: Adding Priority Scheduling feature to the subprocess
I am working on a PEP and would appreciate comment. The proposal is available at http://python.timehorse.com/PEP_-_Application_Priority.reST and is repeated below: - :PEP: Unassigned :Title: Adding Priority Scheduling feature to the subprocess module :Version: $Rev: 93 $ :Last Modified: $Date: 2008-02-20 08:37:00 -0500 (Wed, 20 Feb 2008) $ :Author: Jeffrey C. Jacobs :Discussions-To: python at timehorse dot com :Status: Draft :Type: Standards Track :Content-Type: text/x-rst :Created: 19-Feb-2008 :Python-Version: 2.5.1 :Post-History: None -- Introduction The ``subprocess`` module is intended to create a platform-independent method of *spawning* or *popening* or *execing* an OS-level sub- process. This module provides the ability to spawn processes on a variety of platforms by creating an instance of the ``subprocess.Popen`` class. Currently, only the Windows version of the ``Popen.__init__`` method can set the OS priority of a spawned process directly using the ``createFlags`` parameter. Clients operating under UNIX must use some version of the ``preexec_fn`` to either wrap a C-call to the ``setpriority`` POSIX function or do so by prepending ``nice u`` to the ``args`` or in the ``executable``, which would only work for sub- processes spawned from a shell. Under a Windows environment, however, the ``preexec_fn`` parameter is ignored and there is no ``nice`` shell program. This thus precludes the easy setting of a spawned process's priority in the UNIX environment, as well as creates a disconnect in terms of the way priorities are set between Windows and UNIX platforms, which somewhat defeats the purpose of ``subprocess.py`` in terms of being relatively platform-independent. In addition to these issues, because Windows processes are referenced by handles, not by process IDs, although this would divide the UNIX- specific and Windows specific code, the Handle for the windows would none the less be useful in the ``win32process`` module and therefore it is proposed that this handle be officially exposed from the ``Popen`` instance via the name ``handle``. Currently, this property is unofficially accessible via the name ``_handle``, so this proposes to rename that value and make the name official for python running under Windows. The value of ``handle`` for other platforms would then be ``None``. In addition to officially exposing the Handle to Process, it is proposed that the Main Thread Handle, also internally exposed within the ``Popen.__init__`` process, be externally exposed via the name ``hthread`` for use by ``win32process`` and the priority methods. Because UNIX uses priorities between +20 and -20 and Windows, via Process and Thread priorities, allows settings between 0 and 31, a uniform setting for each system should be derived. This would be accomplished by giving process priority in terms of a floating-point value between 0.0 and 1.0 for lowest and highest possible priority, respectively. This priority would be added to the ``Popen`` constructor as an optional parameter, with a default value of ``None``. If and only if something other than ``None`` is set, that value would override any setting in ``createFlags``, and the Process Priority flags of ``createFlags`` would be masked off under the Windows environment. In all cases a non-``None`` setting would cause the spawned process to run at the indicated priority converted to the platform-specific units. The Macintosh OS X / BSD subsystem should be compatible with the UNIX- specific sections of this proposal. Specifics ~ The following steps would accomplish this proposal: 1) Add a C-Python wrapper for the POSIX ``getpriority`` / ``setpriority`` methods to the ``os`` module. These methods would only be available in a UNIX environment and would mesh well with the existing file/process functions specified therein. The ``win32process`` module already exposes the corresponding Windows methods. 2) Officially expose the Process Handle as ``handle`` and the Process's Main Thread Handle as ``hThread`` within the ``Popen`` instance interface. 3) Add ``setPriority`` / ``getPriority`` methods to the ``Popen`` class which will use the platform-specific priority function either from ``os`` for UNIX or ``win32process`` for Windows. The input priority to ``setPriority`` will be checked and raise a ``ValueError`` exception for values not in the range 0.0 to 1.0. The 0.0 to 1.0 scale will be converted to the 32-point Windows scale by linear mapping, e.g. for a floating-point priority *p*, the Windows priority is given by: ``int(p*31 + .5)`` Windows is limited to a non-linear, 7-point scale for process priorities, with thread priorities making up the difference relative to the 32-point internal priority scale. Thus, the Windows versions of these functions will use a combination of ``SetPriorityClass`` and ``SetThreadPriority`` in order to set the requested process priority, using the ``handle``
Re: Handling locked db tables...
On Feb 20, 8:05 am, M.-A. Lemburg [EMAIL PROTECTED] wrote: On 2008-02-20 16:24, breal wrote: I have a db table that holds a list of ports. There is a column in_use that is used as a flag for whether the port is currently in use. When choosing a port the table is read and the first available port with in_use = 0 is used, updated to in_use = 1, used, then updated to in_use = 0. I am using MySQLdb and want to make sure I am locking the table when doing reads, writes, updates since there will be several instances of my program looking for available ports simultaneously. When I run a lock table mytable read I can do all of my transactions. But, when another cursor then tries to do the read I get an error unless the first process has been completed... unlocking the tables. How is this handled generally? This is normal database locking behavior. If you do an update to a table from one process, the updated row is locked until the transaction is committed. If another process wants to access that row (even if only indirectly, e.g. a select that does a query which includes the data from the locked row), that process reports a database lock or times out until the lock is removed by the first process. The reason is simple: you don't want the second process to report wrong data, since there's still a chance the first process might roll back the transaction. Most modern database allow row-level locking. I'm not sure whether MySQL supports this. SQLite, for example, only support table locking. -- Marc-Andre Lemburg eGenix.com Professional Python Services directly from the Source (#1, Feb 20 2008) Python/Zope Consulting and Support ...http://www.egenix.com/ mxODBC.Zope.Database.Adapter ...http://zope.egenix.com/ mxODBC, mxDateTime, mxTextTools ...http://python.egenix.com/ Try mxODBC.Zope.DA for Windows,Linux,Solaris,MacOSX for free ! eGenix.com Software, Skills and Services GmbH Pastor-Loeh-Str.48 D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg Registered at Amtsgericht Duesseldorf: HRB 46611 Marc-Andre, Thanks for the reply. I understand that this is normal locking behavior. What I am looking for is a standard method to either loop the query until the table is unlocked, or put the query into some sort of queue. Basically my queries work like this. Request comes in PART I: LOCK TABLE port_usage READ; SELECT * FROM port_usage WHERE in_use = 0; Get available port UPDATE port_usage SET in_use = 1 WHERE port = available_port; UNLOCK TABLES; send request to available port and do some stuff until finished with port PART II: LOCK TABLE port_usage READ UPDATE port_usage SET in_use = 0 WHERE port = available_port; UNLOCK TABLES; Several of these *may* be happening simultaneously so when a second request comes in, and the first one has the table locked, I want to have the PART I sql still work. Any suggestions here? -- http://mail.python.org/mailman/listinfo/python-list
Re: threaded http server
oh .. thanks for explaining since this is my first ever project i don't know much ... can u give me a basic idea of how it(image_proxy_server) can be done efficiently .. like serving many clients concurrently On Feb 20, 2008 9:01 AM, Christian Heimes [EMAIL PROTECTED] wrote: bharath venkatesh wrote: hi, will this twisted,turbo gear etc help me to create a http server that can serve multiple clients concurrently and also the http server which i want to create in my project will not be doing any IO (it is not like frontend and backend ).. but it will act as a image_proxy_server i.e when a client wants an image it will do a http request to my http server if the image is present in cache it will fetch it directly from cache and return it to the client as an http reponse otherwise it fetch from www and store it cache and also return it to the client as an http response so basically i want to serve many clients concurrently in fast n efficient manner You are reading data from a network socket (IO), you are serving images from a disk cache or memory cache (IO) or you are retrieving images from a remote site (IO). Your application is most certainly not using the CPU much. All you do is serving data or reading data - input and output - IO. :) Christian -- http://mail.python.org/mailman/listinfo/python-list
Re: threaded http server
bharath venkatesh wrote: hi, will this twisted,turbo gear etc help me to create a http server that can serve multiple clients concurrently and also the http server which i want to create in my project will not be doing any IO (it is not like frontend and backend ).. but it will act as a image_proxy_server i.e when a client wants an image it will do a http request to my http server if the image is present in cache it will fetch it directly from cache and return it to the client as an http reponse otherwise it fetch from www and store it cache and also return it to the client as an http response so basically i want to serve many clients concurrently in fast n efficient manner You are reading data from a network socket (IO), you are serving images from a disk cache or memory cache (IO) or you are retrieving images from a remote site (IO). Your application is most certainly not using the CPU much. All you do is serving data or reading data - input and output - IO. :) Christian -- http://mail.python.org/mailman/listinfo/python-list
Re: Handling locked db tables...
breal wrote: On Feb 20, 8:05 am, M.-A. Lemburg [EMAIL PROTECTED] wrote: On 2008-02-20 16:24, breal wrote: I have a db table that holds a list of ports. There is a column in_use that is used as a flag for whether the port is currently in use. When choosing a port the table is read and the first available port with in_use = 0 is used, updated to in_use = 1, used, then updated to in_use = 0. I am using MySQLdb and want to make sure I am locking the table when doing reads, writes, updates since there will be several instances of my program looking for available ports simultaneously. When I run a lock table mytable read I can do all of my transactions. But, when another cursor then tries to do the read I get an error unless the first process has been completed... unlocking the tables. How is this handled generally? This is normal database locking behavior. If you do an update to a table from one process, the updated row is locked until the transaction is committed. If another process wants to access that row (even if only indirectly, e.g. a select that does a query which includes the data from the locked row), that process reports a database lock or times out until the lock is removed by the first process. The reason is simple: you don't want the second process to report wrong data, since there's still a chance the first process might roll back the transaction. Most modern database allow row-level locking. I'm not sure whether MySQL supports this. SQLite, for example, only support table locking. -- Marc-Andre Lemburg eGenix.com Professional Python Services directly from the Source (#1, Feb 20 2008) Python/Zope Consulting and Support ...http://www.egenix.com/ mxODBC.Zope.Database.Adapter ...http://zope.egenix.com/ mxODBC, mxDateTime, mxTextTools ...http://python.egenix.com/ Try mxODBC.Zope.DA for Windows,Linux,Solaris,MacOSX for free ! eGenix.com Software, Skills and Services GmbH Pastor-Loeh-Str.48 D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg Registered at Amtsgericht Duesseldorf: HRB 46611 Marc-Andre, Thanks for the reply. I understand that this is normal locking behavior. What I am looking for is a standard method to either loop the query until the table is unlocked, or put the query into some sort of queue. Basically my queries work like this. Request comes in PART I: LOCK TABLE port_usage READ; SELECT * FROM port_usage WHERE in_use = 0; Get available port UPDATE port_usage SET in_use = 1 WHERE port = available_port; UNLOCK TABLES; send request to available port and do some stuff until finished with port PART II: LOCK TABLE port_usage READ UPDATE port_usage SET in_use = 0 WHERE port = available_port; UNLOCK TABLES; Several of these *may* be happening simultaneously so when a second request comes in, and the first one has the table locked, I want to have the PART I sql still work. Any suggestions here? I think you want to use SELECT for UPDATE or SELECT LOCK IN SHARE MODE. Here is a link that might help: http://dev.mysql.com/doc/refman/5.1/en/innodb-locking-reads.html -Larry -- http://mail.python.org/mailman/listinfo/python-list
Re: The big shots
Dotan Cohen wrote: French and Spanish have impersonal pronouns: on and se, respectively. In English, they often come out as, we, they, and you a lot, on occasion a one, and sometimes, even, I. In Hebrew, we have 8 different words for you. That does not affect my English communications, however. Also, let's not forget that the English language has one as an impersonal pronoun. /W (BTW: Don't feed the bot. ;) ) -- http://mail.python.org/mailman/listinfo/python-list
Re: is this data structure build-in or I'll have to write my own class?
On Feb 20, 3:32 pm, Jorge Vargas [EMAIL PROTECTED] wrote: On Feb 20, 2008 8:15 AM, Larry Bates [EMAIL PROTECTED] wrote: Jorge Vargas wrote: I need a data structure that will let me do: - attribute access (or index) - maintain the order (for iter and print) - be mutable. [...] Sounds like a good time to learn ElementTree (included in Python 2.5 but available for earlier versions). I am using ET, to fetch the data from the XML, after that I want a plain python object. for the rest of the program. Ok, you just lost me... Why do you thin ET is not appropriate (*)? It fits all your requirements, is optimized for representing hierarchical data (especially xml), it is fast, it is well tested, it has a community of users, it is included in the standard library, etc., etc. ...maybe I didn't grok what you meant by plain python object? -- bjorn (*) I just had a flashback to the movie ET -- the scene when he's in the closet ;-) -- http://mail.python.org/mailman/listinfo/python-list
class object using widget
from Tkinter import * # get widget classes
from tkMessageBox import askokcancel # get canned std dialog
class Quitter(Frame): # subclass our GUI
def __init__(self, parent=None): # constructor method
Frame.__init__(self, parent)
self.pack()
widget = Button(self, text='Quit', command=self.quit)
widget.pack(side=LEFT)
def quit(self):
ans = askokcancel('Verify exit', Really quit?)
if ans: Frame.quit(self)
if __name__ == '__main__': Quitter().mainloop()
In the above program, why the error comes ??
--
http://mail.python.org/mailman/listinfo/python-list
Re: how to finish a while loop...
richie schrieb That code works. Maybe you fixed it while you were mailing it =) This is weird mate. I'm using eclipse 3.2 with the pydev plugin. There it loops forever - from the eclipse console. Two hours of trying, changing the code...finally gave up. Then I got your reply. Opened up a regular console and executed it from there. And voilait works! Well, after this I'm going back to the old trusty shell. Thanks again mate. I try it too in my eclipse3.2. I got the same result. It seems very strange. Print out answer and see if there is a difference ... my $0.02 Martin -- http://mail.python.org/mailman/listinfo/python-list
packing things back to regular expression
Hi
I wonder if python has a function to pack things back into regexp,
that has group names.
e.g:
exp = (?Pname1[a-z]+)
compiledexp = re.compile(exp)
Now, I have a dictionary mytable = {a : myname}
Is there a way in re module, or elsewhere, where I can have it match
the contents from dictionary to the re-expression (and check that it
matches the rules) and than return the substituted string?
e.g
re.SomeNewFunc(compilexp, mytable)
myname
mytable = {a : 1}
re.SomeNewFunc(compileexp, mytable)
ERROR
Thanks
A
--
http://mail.python.org/mailman/listinfo/python-list
Re: The big shots
On 19 Feb., 04:14, [EMAIL PROTECTED] wrote: The printing press, rail, automobiles, and Python, were not in prevalent use before their invention. True but automobiles fuelled with newspapers and driven by Pythons still aren't. Right? Not entirely sure what you are after but it sounds much like the quite familiar Guido-doesn't-give-Python-newbies-enough-freedom-to-change- the-language father complex. -- http://mail.python.org/mailman/listinfo/python-list
Re: packing things back to regular expression
Amit Gupta wrote:
Hi
I wonder if python has a function to pack things back into regexp,
that has group names.
e.g:
exp = (?Pname1[a-z]+)
compiledexp = re.compile(exp)
Now, I have a dictionary mytable = {a : myname}
Is there a way in re module, or elsewhere, where I can have it match
the contents from dictionary to the re-expression (and check that it
matches the rules) and than return the substituted string?
I'm not following what you're asking for until I get to the last two
words. The re module does have functions to do string substitution.
One or more occurrences of a pattern matched by an re can be replaces
with a given string. See sub and subn. Perhaps you can make one of
those do whatever it is you are trying to do.
Gary Herron
e.g
re.SomeNewFunc(compilexp, mytable)
myname
mytable = {a : 1}
re.SomeNewFunc(compileexp, mytable)
ERROR
Thanks
A
--
http://mail.python.org/mailman/listinfo/python-list
Re: Why must implementing Python be hard unlike Scheme?
On Feb 19, 2008 3:15 AM, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: Does this have to be true? Beneath the more complex syntax are there a few core design principles/objects/relationships to help in grokking the whole thing? Got any related links? Take a look at a simpler implementation, like tinypy: http://www.philhassey.com/blog/2008/02/19/tinypy-64k-nearing-10-and-it-really-does-fit-in-64k/ -- http://www.advogato.org/person/eopadoan/ Bookmarks: http://del.icio.us/edcrypt -- http://mail.python.org/mailman/listinfo/python-list
correlation between seemingly independent instances of same class
Hello,
the results of the following code boggle me. i would have expected
that y.data is not affected by setting z.data.
Regards Jan
--code-
class Test:
def __init__(self, x={}):
self.data = x
#end def
#end class Test
y = Test()
z = Test()
print 'y.data = ',y.data
print 'z.data = ',z.data
z.data['B'] = 2 # this statement also sets y.data
z.data= {'A': 1} # this statement doesn't
print 'y.data = ',y.data
print 'z.data = ',z.data
--code end---
--output---
C:\Program Files\Python25\pythonw -u thestrangething.py
y.data = {}
z.data = {}
y.data = {'B': 2}
z.data = {'A': 1}
--
http://mail.python.org/mailman/listinfo/python-list
Re: packing things back to regular expression
Before I read the message: I screwed up.
Let me write again
x = re.compile(CL(?Pname1[a-z]+))
# group name name1 is attached to the match of lowercase string of
alphabet
# Now I have a dictionary saying {name1, iamgood}
# I would like a function, that takes x and my dictionary and return
CLiamgood
# If my dictionary instead have {name1, 123}, it gives error on
processingit
#
# In general, I have reg-expression where every non-trivial match has
a group-name. I want to do the reverse of reg-exp match. The function
can take reg-exp and replace the group-matches from dictionary
# I hope, this make it clear.
--
http://mail.python.org/mailman/listinfo/python-list
scanf in python?
Hello python-list, This is my first post and yes I am a python newbie :-) I've been trying to figure out how to convert an old database dump into a form that can be imported into Postgresql. The file (dealing with one table) looks something like this: create table table1 (id int, name char(20), agw_map char(14), agw real) id 1 11 name 13 32 agw 34 47 619536_00195 26.728 618836_00188 31.905 621736_00223 19.644 607836_00024 38.055 607936_00025 37.678 608036_00027 40.03 608136_00028 38.884 608236_00030 43.616 608336_00032 46.548 608436_00033 48.593 608536_00036 53.764 ** End of Table ** In C I could build a format string (using info from the table create statement and the column position in the header) and use scanf to parse this file. What does the Python solution looks like? Thanks in advance. Bob -- http://mail.python.org/mailman/listinfo/python-list
Re: packing things back to regular expression
mytable = {a : myname}
re.SomeNewFunc(compilexp, mytable)
myname
how does SomeNewFunc know to pull a as opposed to any other key?
mytable = {a : 1}
re.SomeNewFunc(compileexp, mytable)
ERROR
You could do something like one of the following 3 functions:
import re
ERROR = 'ERROR'
def some_new_func(table, regex):
Return processed results for values matching regex
result = {}
for k,v in table.iteritems():
m = regex.match(v)
if m:
result[k] = m.group(1)
else:
result[k] = ERROR
return result
def some_new_func2(table, regex, key):
Get value (if matches regex) or ERROR based on key
m = regex.match(table[key])
if m: return m.group(0)
return ERROR
def some_new_func3(table, regex):
Sniff the desired key from the regexp (inefficient)
for k,v in table.iteritems():
m = regex.match(v)
if m:
groupname, match = m.groupdict().iteritems().next()
if groupname == k:
return match
return ERROR
if __name__ == __main__:
NAME = 'name1'
mytable = {
'a': 'myname',
'b': '1',
NAME: 'foo',
}
regexp = '(?P%s[a-z]+)' % NAME
print 'Using regex:'
print regexp
print '='*10
r = re.compile(regexp)
results = some_new_func(mytable, r)
print 'a: ', results['a']
print 'b: ', results['b']
print '='*10
print 'a: ', some_new_func2(mytable, r, 'a')
print 'b: ', some_new_func2(mytable, r, 'b')
print '='*10
print '%s: %s' % (NAME, some_new_func3(mytable, r))
Function#2 is the optimal solution, for single hits, whereas
Function#1 is best if you plan to repeatedly extract keys from
one set of processed results (the function only gets called
once). Function#3 is just ugly, and generally indicates that you
need to change your tactic ;)
-tkc
--
http://mail.python.org/mailman/listinfo/python-list
unitests don't run under pdb
Hi I have a unitest file: If I do python testname.py : the unitests runs as usual and I get the following results: -- Ran 2 tests in 0.024s OK However, if I do python -m pdb testnames.py: I get ython -m pdb testnames.py /s/nd6/amit/pyiglu/testnames.py(1)module() - import unittest (Pdb) c -- Ran 0 tests in 0.000s OK --- Anything else, I should be doing (python version 2.5.1) Thanks!! -- http://mail.python.org/mailman/listinfo/python-list
Re: how to finish a while loop...
icarus wrote: Opened up a regular console and executed it from there. And voilait works! Well, after this I'm going back to the old trusty shell. +1 QOTW -- http://mail.python.org/mailman/listinfo/python-list
Re: is this data structure build-in or I'll have to write my own class?
On Feb 20, 12:07 pm, thebjorn [EMAIL PROTECTED] wrote: On Feb 20, 3:32 pm, Jorge Vargas [EMAIL PROTECTED] wrote: On Feb 20, 2008 8:15 AM, Larry Bates [EMAIL PROTECTED] wrote: Jorge Vargas wrote: I need a data structure that will let me do: - attribute access (or index) - maintain the order (for iter and print) - be mutable. [...] Sounds like a good time to learn ElementTree (included in Python 2.5 but available for earlier versions). I am using ET, to fetch the data from the XML, after that I want a plain python object. for the rest of the program. Ok, you just lost me... Why do you thin ET is not appropriate (*)? It fits all your requirements, is optimized for representing hierarchical data (especially xml), it is fast, it is well tested, it has a community of users, it is included in the standard library, etc., etc. ...maybe I didn't grok what you meant by plain python object? -- bjorn (*) I just had a flashback to the movie ET -- the scene when he's in the closet ;-) This isn't so optimal but I think accomplishes what you desire to some extent... I *think* there is some hidden gem in inheriting from dict or an mapping type that is cleaner than what I've shown below though. class dum_struct: def __init__(self,keyList,valList): self.__orderedKeys = keyList self.__orderedValList = valList def __getattr__(self,name): return self.__orderedValList[self.__orderedKeys.index(name)] keys = ['foo','baz'] vals = ['bar','bal'] m = dum_struct(keys,vals) print m.foo -- http://mail.python.org/mailman/listinfo/python-list
Re: class object using widget
asit wrote:
from Tkinter import * # get widget classes
from tkMessageBox import askokcancel # get canned std dialog
class Quitter(Frame): # subclass our GUI
def __init__(self, parent=None): # constructor method
Frame.__init__(self, parent)
self.pack()
widget = Button(self, text='Quit', command=self.quit)
widget.pack(side=LEFT)
def quit(self):
ans = askokcancel('Verify exit', Really quit?)
if ans: Frame.quit(self)
if __name__ == '__main__': Quitter().mainloop()
In the above program, why the error comes ??
What error?
--
http://mail.python.org/mailman/listinfo/python-list
Re: Querying a complex website
On Feb 19, 4:04 pm, 7stud [EMAIL PROTECTED] wrote:
schweet1 wrote:
Greetings,
I am attempting to use python to submit a query to the following URL:
https://ramps.uspto.gov/eram/patentMaintFees.do
The page looks simple enough - it requires submitting a number into 2
form boxes and then selecting from the pull down.
However, my test scripts have been hung up, apparently due to the
several buttons on the page having the same name. Ideally, I would
have the script use the Get Bibligraphic Data link.
Any assistance would be appreciated.
~Jon
This is the section you are interested in:
-
tr
td colspan=3input type=submit name=maintFeeAction
value=Retrieve Fees to Pay /td
/tr
tr
td colspan=3input type=submit name=maintFeeAction value=Get
Bibliographic Data /td
/tr
tr
td colspan=3input type=submit name=maintFeeAction value=View
Payment Windows /td
/tr
tr
1) When you click on a submit button on a web page, a request is sent
out for the web page listed in the action attribute of the form tag,
which in this case is:
form name=mfInputForm method=post action=/eram/
getMaintFeesInfo.do;jsessionid=-MCoYNbJsaUCr2VfzZhKILX:11g0uepfb
The url specified in the action attribute is a relative url. The
current url in the address bar of your browser window is:
https://ramps.uspto.gov/eram/patentMaintFees.do
and if you compare that to the url in the action attribute of the
form tag:
-https://ramps.uspto.gov/eram/patentMaintFees.do
/eram/getMaintFeesInfo.do;jsessionid=-MCoYNbJsaUCr2VfzZhKILX:
11g0uepfb
-
you can piece them together and get the absolute url:
https://ramps.uspto.gov/eram/getMaintFeesInfo.do;jsessionid=-MCoY...
2) When you click on a submit button, a request is sent to that url.
The request will contain all the information you entered into the form
as name/value pairs. The name is whatever is specified in the name
attribute of a tag and the value is whatever is entered into the form.
Because the submit buttons in the form have name attributes, the name
and value of the particular submit button that you click will be added
to the request.
3) To programmatically mimic what happens in your browser when you
click on the submit button of a form, you need to send a request
directly to the url listed in the action attribute of the form.
Your request will contain the name/value pairs that would have been
sent to the server if you had actually filled out the form and clicked
on the 'Get Bibliographic Data' submit button. The form contains
these input elements:
input type=text name=patentNum maxlength=7 size=7 value=
input type=text name=applicationNum maxlength=8 size=8
value=
and the submit button you want to click on is this one:
input type=submit name=maintFeeAction value=Get Bibliographic
Data
So the name value pairs you need to include in your request are:
data = {
'patentNum':'1234567',
'applicationNum':'08123456',
'maintFeeAction':'Get Bibliographic Data'
}
Therefore, try something like this:
import urllib
data = {
'patentNum':'1234567',
'applicationNum':'08123456',
'maintFeeAction':'Get Bibliographic Data'
}
enc_data = urllib.urlencode(data)
url = 'https://ramps.uspto.gov/eram/
getMaintFeesInfo.do;jsessionid=-MCoYNbJsaUCr2VfzZhKILX:11g0uepfb'
f = urllib.urlopen(url, enc_data)
print f.read()
f.close()
If that doesn't work, you may need to deal with cookies that the
server requires in order to keep track of you as you navigate from
page to page. In that case, please post a valid patent number and
application number, so that I can do some further tests.- Hide quoted text -
- Show quoted text -
Thanks all - I think there are cookie issues - here's an example data
pair to play with: 6,725,879 (10/102,919). I'll post some of the code
i've tried asap.
--
http://mail.python.org/mailman/listinfo/python-list
Re: ANN: Phatch = PHoto bATCH processor and renamer based on PIL
Stani [EMAIL PROTECTED] said : Even without python-pyexiv2 Phatch features read-only EXIF support thanks to PIL. So you can name your files or write data stamps (date, aperature, velocity, ...) based on EXIF information. Oh, that's good. I hadn't looked at PIL for a long while and wasn't aware it did that. If you want to save EXIF and IPTC information to files you need python-pyexiv2. From its website: However, the library and all the tools used are cross-platform, so very little tweaking should be needed to get it to work fine on Windows or MacOS X. http://tilloy.net/dev/pyexiv2/developers.htm The exiv2 website says: The Windows package only contains the command line utility exiv2.exe (statically linked), manpage and a sample command file; get the source and doc packages for the library, documentation and other tools. http://www.exiv2.org/download.html So maybe someone can compile it. Thanks for the confirmation Stani : as I suspected, this means exiv2 is (deliberately ?) not end-user-ready for Windows (as in, download, install and configure). I have Googled around a bit but there doesn't seem to be anyone supplying a ready-made binary lib. Too bad. But... Phatch is designed with flexibility in mind. If someone can point me to a free python library for Windows for EXIF and other metadata, I'll be happy to integrate support for it in Phatch. Ideas anyone? That is exactly the problem. EXIF/IPTC were fashionable in python circles some years ago but apart from a long-dead sourceforge project and a couple of read-only modules, nothing really came out of it. In fact, I was coincidentally searching for just such a thing when I came across a pointer to Phatch, a few days before you announced it here... -- http://mail.python.org/mailman/listinfo/python-list
Re: The big shots
On Feb 19, 7:52 pm, Gabriel Genellina [EMAIL PROTECTED] wrote: En Tue, 19 Feb 2008 23:19:29 -0200, [EMAIL PROTECTED] escribió: But 'ext' is actually good. Even if it were, that alone doesn't mean it should be included in the stdlib. Start writting a recipe in the Python Cookbook: http://aspn.activestate.com/ASPN/Cookbook/Python/ Upload the module to the Python Package Index:http://pypi.python.org/pypi Post a notice in the announcement list. Wait for user feedback. Listen. Improve it. Make it so good that everyone would love to have it always available. Commit yourself to maintain the module forever. Suggest inclusion in the stdlib. -- Gabriel Genellina I don't know what everyone would love to have always available. I'm baffled that anyone ever pretends to (know). No, but nobody likes it. What? If cl-py is not the right place for personal exchanges, then get going. I am seeking a rational, informed, constructive evaluation of the merits and demerits of 'ext'. It's also productive to characterize trends of things in the std. lib., and I could even see that discussion arising from this one. It's just up to us whether it's in the same thread or not. -- http://mail.python.org/mailman/listinfo/python-list
syntax error in python
Hi
I am executing following commands.
test = os.path.isfile('c:\\src\\kasjdfl.txt')
print test
True
working fine but for below statement it is giving syntax
error.
if (os.path.isfile('c:\\src\\kasjdfl.txt'))
SyntaxError: invalid syntax
any idea what is incorrect in my syntax
--
http://mail.python.org/mailman/listinfo/python-list
Re: syntax error in python
On Feb 20, 2:03 pm, Lalit [EMAIL PROTECTED] wrote:
Hi
I am executing following commands. test =
os.path.isfile('c:\\src\\kasjdfl.txt')
print test
True
working fine but for below statement it is giving syntax
error.
if (os.path.isfile('c:\\src\\kasjdfl.txt'))
SyntaxError: invalid syntax
any idea what is incorrect in my syntax
oops got the mistake I was nt ending if with :
sorry and thanks
--
http://mail.python.org/mailman/listinfo/python-list
Re: The big shots
On Tue, Feb 19, 2008 at 5:31 PM, Diez B. Roggisch [EMAIL PROTECTED] wrote: May I insist? By the criteria you've mentioned so far, nothing rules out 'ext'. If it's still a bad idea, there's a reason. What is it? You imply that just because something is somehow working and even useful for a *some* people (some being maybe only you) that it would be worth including in the python standard lib. It is not. There are no really formal rules for inclusion, but these are certainly rules of thumb that are being considered: - is it useful for *a lot of people* - will it be mantained and maintainable for ever once it is part of the standard distribution - does it introduce external dependencies? If yes, this must be *very* carful considered. - is the design well-thought and mature - does it make sense tying the release cycle of python the cycle of the new lib And insulting the people who do work on python and do a marvellous job doing so is certainly *not* helping. And of course if ext was a good idea, we'd use Weave from scipy instead, which exists and works. -- http://mail.python.org/mailman/listinfo/python-list
ANN: allmydata.org Tahoe v0.8 -- a secure, decentralized filesystem
ANNOUNCING: Allmydata.org Tahoe version 0.8 We are pleased to announce the release of version 0.8 of allmydata.org Tahoe. Allmydata.org Tahoe is a secure, decentralized, fault-tolerant filesystem. All of the source code is available under a Free Software, Open Source licence (or two). This filesystem is encrypted and distributed over multiple peers in such a way that it continues to work correctlly even when some of the peers are unavailable, malfunctioning, or malicious. This is the successor to Allmydata-Tahoe v0.7, which was released January 8, 2008 [1]. This release improves performance, diagnostics, and packaging. This release of allmydata.org Tahoe will form the basis of the next consumer backup product from Allmydata, Inc. -- http://allmydata.com . Since v0.7 we've made the following changes: * Add a preliminary Microsoft Windows package (ticket #195). * Add a preliminary Macintosh package (ticket #182). * Display information about peers (ticket #32). * Display information about uploads and downloads (ticket #39). * Add unit tests and docs for contrib/fuse (ticket #255). * Add a preliminary FUSE interface for Macintosh. * Update docs, starting with docs/about.html -- http://allmydata.org/source/tahoe/trunk/docs/about.html . * Improve logging, diagnostic tools, statistics, timing measurements during upload, etc.. * Add more measurements of performance: http://allmydata.org/trac/tahoe/wiki/Performance . * Add an upload helper, with resumption of incomplete uploads and short-circuiting of uploads if the file is already present (tickets #116, #258, #218). * Make upload continue even if some servers disappear during the upload process. * Add mtime and ctime timestamps to files (ticket #183). * Make introduction more efficient by allowing nodes to act as clients-only and not publish themselves as servers (ticket #271). * Extend the web API to allow programmatic control of mutable files. * Fix potential problem that could cause corruption of downloaded mutable files if a long series of unlikely coincidences and hacked clients occurred (ticket #312). * Make file and directory names use unicode. * Use SHA-256d instead of SHA-256 for secure hashes. WHAT IS IT GOOD FOR? With Tahoe, you can distribute your filesystem across a set of computers, such that if some of the computers fail or turn out to be malicious, the filesystem continues to work from the remaining computers. You can also share your files with other users, using a strongly encrypted, capability-based access control scheme. This release is targeted at hackers and smart users who are willing to use a web user interface, a command-line user interface, or a FUSE interface. (Or a RESTful API. Just telnet to localhost and type HTTP requests to get started.) Because this software is new, it is not yet recommended for storage of highly confidential data nor for valuable data which is not otherwise backed up. However, it works well in practice, it comes with extensive unit tests [2], and there are no known security flaws which would compromise confidentiality or data integrity. (For a current description of all known security issues and an overview of Tahoe's security properties, please see the Security web page: [3].) This release of Tahoe is suitable for the friendnet use case [4] -- it is easy to create a filesystem spread over the computers of you and your friends so that you can share files and disk space with one another. LICENCE You may use this package under the GNU General Public License, version 2 or, at your option, any later version. See the file COPYING.GPL for the terms of the GNU General Public License, version 2. You may use this package under the Transitive Grace Period Public Licence, version 1.0. The Transitive Grace Period Public Licence says that you may distribute proprietary derived works of Tahoe without releasing the source code of that derived work for up to twelve months, after which time you are obligated to release the source code of the derived work under the Transitive Grace Period Public Licence. See the file COPYING.TGPPL.html for the terms of the Transitive Grace Period Public Licence, version 1.0. (You may choose to use this package under the terms of either licence, at your option.) INSTALLATION Tahoe works on Linux, Mac OS X, Windows, Cygwin, and Solaris. For installation instructions please see docs/install.html [5]. HACKING AND COMMUNITY Please join us on the mailing list [6] to discuss uses of Tahoe. Patches that extend and improve Tahoe are gratefully accepted -- the RoadMap page [7] shows the next improvements that we plan to make and CREDITS [8] lists the names of people who've contributed to the project. The wiki Dev page [9] contains resources for hackers. SPONSORSHIP Tahoe is sponsored by Allmydata, Inc. [10], a provider of consumer backup services. Allmydata, Inc. contributes hardware,
Re: threaded http server
bharath venkatesh wrote: hi, will this twisted,turbo gear etc help me to create a http server that can serve multiple clients concurrently Yes. Google for the projects and do some reading, they are all serving large web sites with sometimes havy demand. and also the http server which i want to create in my project will not be doing any IO (it is not like frontend and backend ).. but it will act as a image_proxy_server i.e when a client wants an image it will do a http request to my http server if the image is present in cache it will fetch it directly from cache and return it to the client as an http reponse otherwise it fetch from www and store it cache and also return it to the client as an http response so basically i want to serve many clients concurrently in fast n efficient manner Sorry: reading from and writing to the network *is* I/O (the data is outside the proess, isn't it?). This might be OK as a learning exercise, but if you just need this in production as quickly as possible I would imagine some combination of Squid and Apache would meet your needs very nicely. On Feb 20, 2008 5:51 AM, Christian Heimes [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] wrote: bharath venkatesh wrote: hi i want to create fast n efficient http server which serve multiple client concurrently .. so i thought of threading the http server using Threads ain't efficient for IO bound problems like a HTTP server. Most OSs have far better ways to deal with IO bound applications like select(), poll(), epoll(), kqueue() or IOCP. Use Twisted :) regards Steve -- Steve Holden+1 571 484 6266 +1 800 494 3119 Holden Web LLC http://www.holdenweb.com/ -- http://mail.python.org/mailman/listinfo/python-list
