RE: Putting asterisks around text
[http://www.emofaces.com/en/emoticons/t/thumbs-up-emoticon.gif]
-Original Message-
From: D'Arcy J.M. Cain [mailto:da...@druid.net]
Sent: Monday, February 09, 2009 20:21
To: todp...@hotmail.com
Cc: python-list@python.org
Subject: Re: Putting asterisks around text
On Mon, 9 Feb 2009 10:09:26 -0800
"todp...@hotmail.com" wrote:
> I'm trying to write a program that puts asterisks around the input text using
> while loop.
> I can do this without using while loop, but how can you do that using
> while loop?Example:Enter a string: Hello world***Hello
> world***
while understand_problem is False:
study("textbook")
complete("homework")
if want_help is True:
study("http://www.catb.org/~esr/faqs/smart-questions.html";)
--
D'Arcy J.M. Cain | Democracy is three wolves
http://www.druid.net/darcy/| and a sheep voting on
+1 416 425 1212 (DoD#0082)(eNTP) | what's for dinner.
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Re: getopt
On Feb 11, 5:46 pm, Matthew Sacks wrote: > I didn't realize that the no-value arguments, -b, -h, etc are required? required sense 1: the 2nd arg of the function is required; if there are to be no short options, the 2nd arg should be an empty string. required sense 2: you are required to specify *all* short options that you will accept, whether they are no-value or value options; otherwise you would have to do your own checking for unacceptable options > This seems to make things a bit more difficult considering unless I > use the GNU style getopt all arguments are required to be passed? What does "all arguments are required to be passed" mean? The user is not required to supply an arg corresponding to any option. Options are optional! GNU? Change getopt.getopt to getopt.gnu_getopt and you still get an exception like "GetoptError: option -b not recognized" if -b is not defined in the 2nd arg of [gnu_]getopt. AFAICT the GNU difference is only the documented different treatment of an arg string like "-a1 -b bvalue stray -c -d" ... non-Gnu treats -c and -d the same as stray. > I will have a look at what you have posted here and report my results. Just bear in mind that it was written under the assumption that you weren't plannning to use short options at all; your examples left lack for want. Cheers, John -- http://mail.python.org/mailman/listinfo/python-list
Re: Escaping my own chroot...
Dennis Lee Bieber schrieb: > That's the whole purpose of chroot()... As far as the process is > concerned, the chroot() path is now the top of the file system, so there > is no where above it you can get to... Yes, you can get with some hacks. > chroot() is meant for cases where one may be running a server or such > that should not permit any outside hacks from reaching above its level. > Typically one creates a minimal environment of just those commands and > programs needed by users of the server -- you remove anything that > offers privileged ability. > > chdir() would be used to change the current directory of the process, so > any spawned commands would operate in the new directory by default chroot() must not be understood as a security mechanism like BSD's jail. A process can still access resources outside the chroot. Unless the process drops it's root privileges with setuid() ASAP the process can escape the chroot'ed environment, too. chroot() can help with increasing security but it's not bullet proof. By the way it's a bad idea to mount proc and sys inside a chroot ... Christian -- http://mail.python.org/mailman/listinfo/python-list
Re: Avoiding argument checking in recursive calls
On Feb 10, 7:58 pm, Steven D'Aprano wrote: > I sometimes write recursive functions like this simple factorial: > > def fact(n): > if n < 0: raise ValueError > if n = 0: return 1 > return fact(n-1)*n > > At the risk of premature optimization, I wonder if there is an idiom for > avoiding the unnecessary test for n <= 0 in the subsequent recursive > calls? For the sake of the argument, let's pretend the test is expensive > and I have a good reason for wanting to avoid it on subsequent calls :) > > I've done this: > > def _fact(n): > if n = 0: return 1 > return _fact(n-1)*n > > def fact(n): > if n < 0: raise ValueError > return _fact(n) > > but that's ugly. What else can I do? > > -- > Steven Build a list of function calls, and just replace the base case with a terminating call. >>> def f( n ): ... def rec( i ): ... return i* funcs[ i- 1 ]( i- 1 ) ... def base( i ): ... return 1 ... funcs= [ rec ]* n ... funcs[ 0 ]= base ... return rec( n ) ... >>> f( 5 ) 120 >>> f( 6 ) 720 >>> f( 1 ) 1 -- http://mail.python.org/mailman/listinfo/python-list
Re: python3 tutorial for newbie
"Gabriel Genellina" wrote in message
news:mailman.9312.1234332608.3487.python-l...@python.org...
> En Tue, 10 Feb 2009 16:22:36 -0200, Gary Wood
> escribió:
>
>> Can someone recommend a good tutorial for Python 3, ideally that has
>> tasks or assignments at the end of each chapter.
>
> I don't know of any specifically targetted to Python 3, except the
> official one at http://www.python.org/doc/3.0/
>
> For the most part, any Python tutorial should be fine. Perhaps the only
> visible change (at the tutorial level) is that "print" became a function:
>
> # 2.x syntax:
> print "Hello", "world!"
>
> # 3.x syntax:
> print("Hello", "world!")
>
> That said, Python 3.0 is so recent that isn't widely used yet, and many
> third party libraries aren't available for 3.0 at this moment. This
> certainly will change in the future, but in the meantime, perhaps you
> should stick to Python 2.6 for a while.
>
> --
> Gabriel Genellina
Several links here:
http://wiki.python.org/moin/Python3.0Tutorials
>
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Re: import wx works interactive but not from script
ok, sorry for the long wait. I tried this on both my work (XP) and home PC (Vista64) and they are both consistent. I had both Python2.6 and Python 3.0 installed. wxPython didn't like that. As soon as I uninstalled Python3.0, my wxPython started running again. Must be some kind of registry thing. Thanks for the suggestion. -- http://mail.python.org/mailman/listinfo/python-list
Re: Avoiding argument checking in recursive calls
Steven D'Aprano writes: def fact(n): if n < 0: raise ValueError if n = 0: return 1 return fact(n-1)*n At the risk of premature optimization, I wonder if there is an idiom for avoiding the unnecessary test for n <= 0 in the subsequent recursive calls? Reverse the test order def fact(n): if n > 0: return fact(n-1)*n if n == 0: return 1 raise ValueError You must test recursive versus terminal case every call in any case. Nearly always, the first test passes and second is not done. You only test n==0 once, either to terminate or raise exception. This works for any integral value and catches non-integral values. (There is some delay for that, but only bad calls are penalized.) Terry Jan Reedy -- http://mail.python.org/mailman/listinfo/python-list
Re: Avoiding argument checking in recursive calls
> You've merely replaced the 'test n<0' with 'not check' at the expense > of an additional parameter that has to be passed each time (and the > additional test 'n<0' for the first iteration). > -- > http://mail.python.org/mailman/listinfo/python-list > I think you have missed the point. The OP stated that n<0 could stand for an expensive operation, this replaces an expensive check every time with a cheaper one every time. I like the idea of the interface that was in the original post. Cheers, -- http://mail.python.org/mailman/listinfo/python-list
Re: Avoiding argument checking in recursive calls
> > You've merely replaced the 'test n<0' with 'not check' at the expense > of an additional parameter that has to be passed each time (and the > additional test 'n<0' for the first iteration). > -- > http://mail.python.org/mailman/listinfo/python-list > I think you have missed the point. The OP stated that n<0 could stand for an expensive operation, this replaces an expensive check every time with a cheaper one every time. I like the idea of the interface that was in the original post. Cheers, -- http://mail.python.org/mailman/listinfo/python-list
Re: zlib interface semi-broken
Travis wrote: On Tue, Feb 10, 2009 at 01:36:21PM -0800, Scott David Daniels wrote: I personally would like it and bz2 to get closer to each other... Well, I like this idea; perhaps this is a good time to discuss the equivalent of some "abstract base classes", or "interfaces", for compression. As I see it, the fundamental abstractions are the stream-oriented de/compression routines. Given those, one should easily be able to implement one-shot de/compression of strings. In fact, that is the way that zlib is implemented; the base functions are the stream-oriented ones and there is a layer on top of convenience functions that do one-shot compression and decompression. There are a couple of things here to think about. I've wanted to do some low-level (C-coded) search w/o bothering to create strings until a match. I've no idea how to push this down in, but I may be looking for a nice low-level spot to fit. Characteristics for that could be read-only access to small expansion parts w/o copying them out. Also, in case of a match, a (relatively quick) way to mark points as we proceed and a (possibly slower) way to resrore from one or more marked points. Also, another programmer wants to parallelize _large_ bzip file expansion by expanding independent blocks in separate threads (we know how to find safe start points). To get such code to work, we need to find big chunks of computation, and (at least optionally) surround them with GIL release points. So what I suggest is a common framework of three APIs; a sequential compression/decompression API for streams, a layer (potentially generic) on top of those for strings/buffers, and a third API for file-like access. Presumably the file-like access can be implemented on top of the sequential API as well. If we have to be able to start from arbitrary points in bzip files, they have one nasty characteristic: they are bit-serial, and we'll need to start them at arbitrary _bit_ points (not simply byte boundaries). One structure I have used for searching is a result iterator fed by a source iterator, so rather than a read w/ inconvenient boundaries the input side of the thing calls the 'next' method of the provided source. ... I would rather see a pythonic interface to the libraries than a > simple-as-can-be wrapper around the C functions I'm on board with you here. My further suggestion is that we start with the sequential de/compression, since it seems like a fundamental primitive. De/compressing strings will be trivial, and the file-like interface is already described by Python. Well, to be explicit, are we talking about Decompresion and Compression simultaneously or do we want to start with one of them first? 2) The de/compression object has routines for reading de/compressed data and states such as end-of-stream or resynchronization points as exceptions, much like the file class can throw EOFError. My problem with this is that client code has to be cognizant of the possible exceptions that might be thrown, and so one cannot easily add new exceptions should the need arise. For example, if we add an exception to indicate a possible resynchronization point, client code may not be capable of handling it as a non-fatal exception. Seems like we may want to say things like, "synchronization points are too be silently ignored." --Scott David Daniels scott.dani...@acm.org -- http://mail.python.org/mailman/listinfo/python-list
best way to serve wsgi with multiple processes
Hi, I am building some computational web services using soaplib. This creates a WSGI application. However, since some of these services are computationally intensive, and may be long running, I was looking for a way to use multiple processes. I thought about using multiprocessing.Process manually in the service, but I was a bit worried about how that might interact with a threaded server (I was hoping the thread serving that request could just wait until the child is finished). Also it would be good to keep the services as simple as possible so it's easier for people to write them. I have at the moment the following WSGI structure: TransLogger(URLMap(URLParser(soaplib objects))) although presumably, due to the beauty of WSGI, this shouldn't matter. As I've found with all web-related Python stuff, I'm overwhelmed by the choice and number of alternatives. I've so far been using cherrypy and ajp-wsgi for my testing, but am aware of Spawning, twisted etc. What would be the simplest [quickest to setup and fewest details of the server required - ideally with a simple example] and most reliable [this will eventually be 'in production' as part of a large scientific project] way to host this sort of WSGI with a process-per-request style? Thanks! Robin -- http://mail.python.org/mailman/listinfo/python-list
Re: Avoiding argument checking in recursive calls
Terry Reedy wrote: > Reverse the test order > > def fact(n): > if n > 0: return fact(n-1)*n > if n == 0: return 1 > raise ValueError sweet! but is this generally possible? ie: did you think this up for this question or is it an idiom that you find yourself using often? andrew -- http://mail.python.org/mailman/listinfo/python-list
Re: ANN: Python 2.6 Quick Reference available
* Richard Gruet (Tue, 10 Feb 2009 20:38:24 +0100) > The Python 2.6 Quick Reference is available in HTML and PDF formats at > http://rgruet.free.fr/#QuickRef. THANK YOU! Thorsten -- http://mail.python.org/mailman/listinfo/python-list
urllib2.Request:: http Request sending successfully, but Response contains in valid data.
Hi
I am trying to send Data to a website through "http" using
"urllib.request" library using the bellow code.
Response status code contains. 200 (OK) but Response contains
nothing...
With same data When I test using C# it working fine.. Response
having.. some data in xml format.
But I am using below python code i am getting response only "".
Is there any in my code..
req = urllib2.Request(url) // url is valid url
req.add_header('Authorization','AuthSub token="x"')
req.add_header('Content-Type','application/atom+xml')
req.data=data // data is having valid xml data
r = urllib2.urlopen(req)
print(r.code) // output 200
print(r.msg) // output OK
print(r.read()) //
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Re: Distributing simple tasks
Noam Aigerman wrote: > Hi, > > Suppose I have an array of functions which I execute in threads (each > thread get a slice of the array, iterates over it and executes each > function in it’s slice one after the other). Now I want to distribute > these tasks between two machines, i.e give each machine half of the > slices and let it run them in threads as described above. Is there an > easy way, or an article on this matter you can point me to? Have a look at MapReduce (google for MapReduce Python). -- Piet van Oostrum URL: http://pietvanoostrum.com [PGP 8DAE142BE17999C4] Private email: p...@vanoostrum.org -- http://mail.python.org/mailman/listinfo/python-list
Re: zlib interface semi-broken
Scott David Daniels writes: > Seems like we may want to say things like, "synchronization points are > too be silently ignored." That would completely break some useful possible applications, so should be avoided. -- http://mail.python.org/mailman/listinfo/python-list
Re: generator object or 'send' method?
Aaron Brady wrote: It would receive the 'send' from a different point in control flow than its usual 'next'. Should it repeat a value if it receives a 'send'? No. This requirement clearly indicates that send() is the wrong tool for the job. I would use a class with a generator as a method, e.g. class Multiples: m = 1 def set_multiplier(self, m): self.m = m def generate(self, limit): for i in xrange(limit): yield i * self.m g = Multiples() for x in g.generate(10): print x if x == 3: g.set_multiplier(42) produces 0 1 2 3 168 210 252 294 336 378 -- Greg -- http://mail.python.org/mailman/listinfo/python-list
Unexpected string behaviour: txt = 'this' ' works'
I did a double take when debugging an error the other day. My
problem was missing out a comma when building a list of strings.
Much to my surprise the offending code still executed to cause
problems later on:
>>> txt = 'this', 'works'
>>> print txt
('this', 'works')
# As expected
>>> txt = 'this' 'works'
>>> print txt
thisworks
# Eh?
I have never seen this behaviour before, but it works in Python 2.2.1
and 2.5.4 so I guess it's meant to be there. I assume it is a feature
of the compiler.
Any thoughts?
Regards
Chris
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ANN: SuPy for Python 2.5 on Windows
SuPy 1.0 - Windows -- A Windows build for Python 2.5 is now available. http://www.cosc.canterbury.ac.nz/greg.ewing/SuPy/ What is SuPy? - SuPy is a plugin for the Sketchup 3D modelling application that lets you script it in Python. This is a first version and is highly experimental. Let me know if it works for you and whether you have any problems. -- Greg Ewing greg.ew...@canterbury.ac.nz -- http://mail.python.org/mailman/listinfo/python-list
Re: Unexpected string behaviour: txt = 'this' ' works'
*Literal* string concatenation has always been a part of Python :
http://docs.python.org/reference/lexical_analysis.html#string-literal-concatenation
On Wed, Feb 11, 2009 at 12:06 PM, c d saunter <
christopher.saun...@durham.ac.uk> wrote:
> I did a double take when debugging an error the other day. My
> problem was missing out a comma when building a list of strings.
>
> Much to my surprise the offending code still executed to cause
> problems later on:
>
> >>> txt = 'this', 'works'
> >>> print txt
> ('this', 'works')
> # As expected
> >>> txt = 'this' 'works'
> >>> print txt
> thisworks
> # Eh?
>
> I have never seen this behaviour before, but it works in Python 2.2.1
> and 2.5.4 so I guess it's meant to be there. I assume it is a feature
> of the compiler.
>
> Any thoughts?
> Regards
> Chris
>
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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Re: python is great
python is great. No. Python is VERY GREAT !!! All right now, everyone... Every Python's sacred, every Python's great, If any Python's wasted, Guido gets irate! -- Greg -- http://mail.python.org/mailman/listinfo/python-list
Re: Unexpected string behaviour: txt = 'this' ' works'
c d saunter a écrit :
I did a double take when debugging an error the other day. My
problem was missing out a comma when building a list of strings.
Much to my surprise the offending code still executed to cause
problems later on:
txt = 'this', 'works'
print txt
('this', 'works')
# As expected
txt = 'this' 'works'
print txt
thisworks
# Eh?
I have never seen this behaviour before, but it works in Python 2.2.1
and 2.5.4 so I guess it's meant to be there. I assume it is a feature
of the compiler.
Any thoughts?
http://docs.python.org/reference/lexical_analysis.html#string-literal-concatenation
--
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Re: Unexpected string behaviour: txt = 'this' ' works'
Bruno Desthuilliers (bruno.42.desthuilli...@websiteburo.invalid) wrote:
: c d saunter a écrit :
: > I did a double take when debugging an error the other day. My
: > problem was missing out a comma when building a list of strings.
: >
: > Much to my surprise the offending code still executed to cause
: > problems later on:
: >
: txt = 'this', 'works'
: print txt
: > ('this', 'works')
: > # As expected
: txt = 'this' 'works'
: print txt
: > thisworks
: > # Eh?
: >
: > I have never seen this behaviour before, but it works in Python 2.2.1
: > and 2.5.4 so I guess it's meant to be there. I assume it is a feature
: > of the compiler.
: >
: > Any thoughts?
:
http://docs.python.org/reference/lexical_analysis.html#string-literal-concatenation
Ahh. Thanks.
Chris
--
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Re: best way to serve wsgi with multiple processes
Robin wrote: Hi, I am building some computational web services using soaplib. This creates a WSGI application. However, since some of these services are computationally intensive, and may be long running, I was looking for a way to use multiple processes. I thought about using multiprocessing.Process manually in the service, but I was a bit worried about how that might interact with a threaded server (I was hoping the thread serving that request could just wait until the child is finished). Also it would be good to keep the services as simple as possible so it's easier for people to write them. I have at the moment the following WSGI structure: TransLogger(URLMap(URLParser(soaplib objects))) although presumably, due to the beauty of WSGI, this shouldn't matter. As I've found with all web-related Python stuff, I'm overwhelmed by the choice and number of alternatives. I've so far been using cherrypy and ajp-wsgi for my testing, but am aware of Spawning, twisted etc. What would be the simplest [quickest to setup and fewest details of the server required - ideally with a simple example] and most reliable [this will eventually be 'in production' as part of a large scientific project] way to host this sort of WSGI with a process-per-request style? .. We've used forked fastcgi (flup) with success as that decouples the wsgi process (in our case django) from the main server (in our case apache). Our reasons for doing that were to allow the backend to use modern pythons without having to upgrade the server (which is required if using say mod_python). The wsgi process runs as an ordinary user which eases some tasks. A disadvantage of our scheme is that long running processes may cause problems eg timeouts. In practice since there are no guarantees for how long an http connection will hold up (because of proxies etc etc) we decided to work around this problem. Basically long running jobs go into a task queue on the server and the response is used to reconnect to the long running job peridically for status querying/results etc etc. -- Robin Becker -- http://mail.python.org/mailman/listinfo/python-list
Re: Unexpected string behaviour: txt = 'this' ' works'
christopher.saun...@durham.ac.uk (c d saunter): >I assume it is a feature of the compiler.< Yes it's a bug-prone antifeature that's probably a relic from C that doesn't have a concatenation operator among strings as Python does (+). So in Python it saves you to use + at the cost of possible bugs. Bye, bearophile -- http://mail.python.org/mailman/listinfo/python-list
Re: cannot install
2009/2/11 administrator > I tried as admin with Python-3.0 in my home directory but no success yet. > Is there another help? > > Macintosh:~ admin$ export > PATH=/opt/local/bin:/opt/local/sbin:/Developer/usr/bin:$PATH > Macintosh:~ admin$ echo $PATH > > /opt/local/bin:/opt/local/sbin:/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Users/admin:/usr/local/bin:/usr/X11/bin > Macintosh:~ admin$ cd ~/Python-3.0 > Macintosh:Python-3.0 admin$ pwd > /Users/admin/Python-3.0 > Macintosh:Python-3.0 admin$ sudo ./configure --enable-framework > checking for --with-universal-archs... 32-bit > checking MACHDEP... darwin > checking machine type as reported by uname -m... i386 > checking for --without-gcc... no > checking for gcc... gcc > checking for C compiler default output file name... > *configure: error: C compiler cannot create executables* > See `config.log' for more details. > Macintosh:Python-3.0 admin$ > What does config.log say? > > > Regards, Vladimir Zupka > > On 10.2.2009, at 14:35, Benjamin Kaplan wrote: > > > > On Tue, Feb 10, 2009 at 4:07 AM, Vladimír Župka wrote: > >> I tried this: >> PATH=$PATH:/Developer/usr/bin >> echo $PATH >> cd /Python-3.0 >> ./configure --enable-framework >> make >> sudo make install >> >> and the result is: >> >> Macintosh:~ vzupka$ /Users/vzupka/Desktop/Python.sh ; exit; >> >> /Library/Frameworks/Python.framework/Versions/Current/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/X11/bin:/Developer/usr/bin >> checking for --with-universal-archs... 32-bit >> checking MACHDEP... darwin >> checking machine type as reported by uname -m... i386 >> checking for --without-gcc... no >> checking for gcc... gcc >> checking for C compiler default output file name... >> *configure: error: C compiler cannot create executables* >> *See `config.log' for more details.* >> make: *** No targets specified and no makefile found. Stop. >> >> WARNING: Improper use of the sudo command could lead to data loss >> or the deletion of important system files. Please double-check your >> typing when using sudo. Type "man sudo" for more information. >> >> To proceed, enter your password, or type Ctrl-C to abort. >> >> Password: >> logout >> >> [Process completed] >> >> What is wrong with C compiler? Where do I find the 'config.log'? >> > > > config.log should be in Python-3.0. I believe that you have a permissions > problem. ./configure needs to generate the makefiles that tell the compiler > what to do and then the make command will create the executables. Since > you're not in your home directory, you (as a standard user) don't have > permission to write to that directory. Either move Python-3.0 to somewhere > that you have write permissions or use sudo for the whole script. > > > > Vladimir Zupka >> >> On 9.2.2009, at 16:56, Benjamin Kaplan wrote: >> >> >> >> On Mon, Feb 9, 2009 at 9:05 AM, Vladimír Župka wrote: >> >>> I have Mac OS X Leopard 10.5.6 and I downloaded and unpacked Python 3.0 >>> into a folder (/Library/Frameworks/Python.framework) and ran commands: >>> >>> cd /Library/Frameworks/Python.framework/Python-3.0 >>> python setup.py install >>> >>> and got the message reporting a syntax error: >>> >>> Macintosh:~ vzupka$ /bin/csh >>> [Macintosh:~] vzupka% cd /Library/Frameworks/Python.framework/Python-3.0 >>> [Macintosh:Frameworks/Python.framework/Python-3.0] vzupka% python >>> setup.py install >>> File "setup.py", line 232 >>> except (CCompilerError, DistutilsError) as why: >>> ^ >>> SyntaxError: invalid syntax >>> [Macintosh:Frameworks/Python.framework/Python-3.0] vzupka% >>> >>> >>> >> >> You can't use setup.py because the python 2.5 on your system (or 2.6 if >> you installed it) is incompatible with Python 3 modules. You need to compile >> Python 3 yourself. It will then automatically call setup.py to create all >> the extension modules. >> >> Just unpack the tarball anywhere and use the following commands Python 3 >> is automatically installed as python3.0, so you don't need to worry about >> overwriting the default python on the system. >> >> ./configure --enable-framework >> make >> sudo make install >> >> more complete instructions are in the Mac/README file, except substitute >> "Python 3.0" everywhere it says "MacPython 2.6". You will probably need to >> install a whole bunch of packages to compile it. configure will tell you >> about them. MacPorts (www.macports.org) and fink (www.finkproject.org) >> provide an easy way to get them. >> >> >>> Regards, >>> Vladimír Župka >>> vzu...@volny.cz >>> >>> >>> >>> >>> >>> >>> -- >>> http://mail.python.org/mailman/listinfo/python-list >>> >>> >> >> Vladimír Župka >> vzu...@volny.cz >> >> >> >> >> >> > > -- http://mail.python.org/mailman/listinfo/python-list
Re: best way to serve wsgi with multiple processes
On Feb 11, 12:10 pm, Robin Becker wrote: > We've used forked fastcgi (flup) with success as that decouples the wsgi > process > (in our case django) from the main server (in our case apache). Our reasons > for > doing that were to allow the backend to use modern pythons without having to > upgrade the server (which is required if using say mod_python). The wsgi > process > runs as an ordinary user which eases some tasks. Yes - I've done something very similar with ajp-wsgi (from the author of flup; and which incidently performs very well works really nicely) to go from apache -> wsgi. But the issue I'm asking about here is to have multiple WSGI processes - ie to allow concurrent execution of more than one web service at the time (since these are long running computational soap web services). ajp-wsgi embeds a single python interpreter so multiple running services would be effected by the GIL - I imagine flup is similar (a single process on the python side). So I'm not worried about decoupling from the web server - I'm happy to use pure python server (which I guess is easier to setup) - but I want the web server to dispatch requests to different processes running the wsgi app. I've looked at Spawning, but couldn't get it to work and it seems a little bit 'beta' for my taste (doesn't exit cleanly, leaves worker processes running etc.) Cheers Robin -- http://mail.python.org/mailman/listinfo/python-list
Re: optparse versus getopt
Robert Kern writes: >> is there some way i can force the import based on the the absolute >> path to the module? > > Better would be for you to copy the optparse.py module onto your > Jython's import path. I'm not particularly familiar with the details > of Jython, so you will need to consult with the Jython documentation > unless if a Jython expert can jump in here. Here is one message > describing this procedure: > > http://osdir.com/ml/lang.jython.user/2004-01/msg00086.html Here are notes from some of my code which can run on Jython. You might also like to check out Jython 2.5 which is in beta. Jython 2.2 needs optparse.py and textwrap.py. These can be copied from Python 2.3 or Optik 1.4.1 or later. May also need gettext.py and locale.py. -- Pete Forman-./\.- Disclaimer: This post is originated WesternGeco -./\.- by myself and does not represent pete.for...@westerngeco.com-./\.- the opinion of Schlumberger or http://petef.22web.net -./\.- WesternGeco. -- http://mail.python.org/mailman/listinfo/python-list
Re: getopt index out of range
Matthew Sacks wrote: > Hi List, > I am getting an index out of range error when trying to parse with getopt. > Probably something simple. Any suggestions are appreciated > > optlist, args = getopt.getopt(sys.argv[1:], 'h', ['connectPassword=', > 'adminServerURL=', 'action=', 'targets=', 'appDir=']) > > > #Assign Opts > connectPassword = optlist[0][1] > adminServerURL = optlist[1][1] > action = optlist[2][1] > targets = optlist[3][1] > appDir = optlist[4][1] > > #this statement never gets executed > print "Args: " + connectPassword + " " + adminServerURL + " " + action > + " " + targets + " " + appDir > > File "/home/msacks/untitled4.py", line 23, in ? > IndexError: index out of range: 0 > It might help a little if you made it more obvious which was line 23 ... The real problem, though, is a misunderstanding of what getopt.getopt() returns. The (option, value) pairs are only returned for options found in the command line, so you can't guarantee there'll be four. Set your values to defaults, then adjust for those for which an option is found in the list, as in the "typical usage" example in the Fine Manual. 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: Functional schmunctional...
Terry Reedy wrote:
> r0g wrote:
>
>>
>> def inet2ip(n):
>> p = (n/16777216)
>> q = ((n-(p*16777216))/65536)
>> r = ((n-((p*16777216)+(q*65536)))/256)
>> s = ((n-((p*16777216)+(q*65536)+(r*256
>> return str(p)+"."+str(q)+"."+str(r)+"."+str(s)
>
> Beyond what other wrote:
> To future-proof code, use // instead of / for integer division.
> To get both quotient and remainder, use divmod(num,den)
> For future reading (and generalization) documenting magic constants helps.
>
> In 3.0:
>
> def inet2ip(n):
> p = (n//16777216)
> q = ((n-(p*16777216))//65536)
> r = ((n-((p*16777216)+(q*65536)))//256)
> s = ((n-((p*16777216)+(q*65536)+(r*256
> return str(p)+"."+str(q)+"."+str(r)+"."+str(s)
>
> def inet2ip2(n):
> p,n=divmod(n,16777216) # 1<<24
> q,n=divmod(n,65536) # 1<<16
> r,s=divmod(n,256) # 1<<8
> return str(p)+"."+str(q)+"."+str(r)+"."+str(s)
>
> print(inet2ip(10), inet2ip2(10))
>
> 59.154.202.0 59.154.202.0
>
Jeez, doesn't anyone read the fine manual any more? I hope this was just
an academic exercise.
>>> socket.inet_ntoa(struct.pack("!l", 10))
'59.154.202.0'
>>>
Holden's rule: when it looks simple enough to be worth including in the
standard library it may well already *be* in the standard library.
regards
Steve
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Holden Web LLC http://www.holdenweb.com/
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Re: getopt index out of range
Steve Holden wrote: Matthew Sacks wrote: Hi List, I am getting an index out of range error when trying to parse with getopt. Probably something simple. Any suggestions are appreciated optlist, args = getopt.getopt(sys.argv[1:], 'h', ['connectPassword=', 'adminServerURL=', 'action=', 'targets=', 'appDir=']) #Assign Opts connectPassword = optlist[0][1] adminServerURL = optlist[1][1] action = optlist[2][1] targets = optlist[3][1] appDir = optlist[4][1] #this statement never gets executed print "Args: " + connectPassword + " " + adminServerURL + " " + action + " " + targets + " " + appDir File "/home/msacks/untitled4.py", line 23, in ? IndexError: index out of range: 0 It might help a little if you made it more obvious which was line 23 ... It a guess I'd say it was: connectPassword = optlist[0][1] because the traceback says the index is 0 and there's only one line with a 0 in it! The real problem, though, is a misunderstanding of what getopt.getopt() returns. The (option, value) pairs are only returned for options found in the command line, so you can't guarantee there'll be four. Set your values to defaults, then adjust for those for which an option is found in the list, as in the "typical usage" example in the Fine Manual. -- http://mail.python.org/mailman/listinfo/python-list
Re: best way to serve wsgi with multiple processes
On Feb 11, 1:28 pm, Robin wrote: > On Feb 11, 12:10 pm, Robin Becker wrote: > > > We've used forked fastcgi (flup) with success as that decouples the wsgi > > process > > (in our case django) from the main server (in our case apache). Our reasons > > for > > doing that were to allow the backend to use modern pythons without having to > > upgrade the server (which is required if using say mod_python). The wsgi > > process > > runs as an ordinary user which eases some tasks. I'm sorry - I originally missed the worked 'forked' and hence the whole point of your message I think. I looked at flup before but had forgotten about the forked version. Having revisited it I think the forked version does keep a process pool so each request is processed by a seperate process, which is exactly what I wanted. Cheers Robin -- http://mail.python.org/mailman/listinfo/python-list
Pycon 2009 Hotel?
I'm attending Pycon this year and for the first time I have to pay for myself. (All training/conference budgets have been zeroed out at my company.) I would like to take the cheaper option by staying at the Crowne Plaza but as I understand it, the part of the conference I'll be attending will be held at the Hyatt Regency. I don't mind the walk but I also don't want to miss out on the open spaces in the evening. Is anyone else similarly on the fence? I'd like to save $130 ((153 - 100) * 3) but since I'm not staying for the sprints and alot of my enjoyment of the conference is the open spaces. -- http://mail.python.org/mailman/listinfo/python-list
Re: best way to serve wsgi with multiple processes
Robin wrote: > On Feb 11, 1:28 pm, Robin wrote: >> On Feb 11, 12:10 pm, Robin Becker wrote: >> >> > We've used forked fastcgi (flup) with success as that decouples the >> > wsgi process (in our case django) from the main server (in our case >> > apache). Our reasons for doing that were to allow the backend to use >> > modern pythons without having to upgrade the server (which is required >> > if using say mod_python). The wsgi process runs as an ordinary user >> > which eases some tasks. > > I'm sorry - I originally missed the worked 'forked' and hence the > whole point of your message I think. > > I looked at flup before but had forgotten about the forked version. > Having revisited it I think the forked version does keep a process > pool so each request is processed by a seperate process, which is > exactly what I wanted. You can have that with mod_wsgi & daemon mode as well, with presumably less setup hassle. Diez -- http://mail.python.org/mailman/listinfo/python-list
Re: Pycon 2009 Hotel?
On Feb 11, 9:13 am, jay graves wrote: > I'm attending Pycon this year and for the first time I have to pay for > myself. (All training/conference budgets have been zeroed out at my > company.) > > I would like to take the cheaper option by staying at the Crowne Plaza > but as I understand it, the part of the conference I'll be attending > will be held at the Hyatt Regency. I don't mind the walk but I also > don't want to miss out on the open spaces in the evening. > > Is anyone else similarly on the fence? I'd like to save $130 ((153 - > 100) * 3) but since I'm not staying for the sprints and alot of my > enjoyment of the conference is the open spaces. (Sorry. i hit 'Send' too quickly.) I'm wondering if I'm being 'penny-wise and pound-foolish'? I'd hate to spend all that money to get there and then not enjoy it because I was at the 'other' hotel. ... Jay Graves -- http://mail.python.org/mailman/listinfo/python-list
Re: Functional schmunctional...
On Feb 10, 9:28 pm, r0g wrote:
> def ip2inet(a):
> li = a.split('.')
> assert len(li) == 4 or len(li) == 6
> return reduce(add,[int(li[e])*(256**((len(li)-1)-e)) for e in
> xrange(0,len(li))])
Aagh! Notice that functional programming is not about filter, map,
reduce and other unreadable constructs: it is much more about avoiding
mutation.
Your problem has been already solved by using the standard library;
however, if you want to know more about functional programming, I
could as well advertise my own series of "Adventures of a Pythonista
in Schemeland" which is facing exactly that topic right now:
http://www.artima.com/weblogs/viewpost.jsp?thread=248953
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Re: Escaping my own chroot...
r0g wrote: > I'm writing a linux remastering script in python where I need to chroot > into a folder, run some system commands and then come out and do some > tidying up, un-mounting proc & sys etc. > > I got in there with os.chroot() and I tried using that to get back out > but that didn't work so... is my script trapped in there forever now or > is there an un-hacky way to escape? No! > If it is an OS restriction rather than my ignorance of python is there a > canonical way of dealing with it? Should I maybe fork a process, have it > do the chroot and wait for it to terminate before continuing? That is the only way... However this is a solved problem if you use schroot (which works very well in my experience) http://packages.debian.org/sid/schroot http://www.debian-administration.org/articles/566 There are definitely debian, ubuntu and centos packages for it if you look! -- Nick Craig-Wood -- http://www.craig-wood.com/nick -- http://mail.python.org/mailman/listinfo/python-list
SOAP client
Hi, I'm trying to consume a SOAP web service using Python. So far I have found two libraries: SOAPpy and ZSI. Both of them rely on PyXML which is no longer maintained (and there is no build for 64bit Windows and the setup.py doesn't seem to know how to build it on Windows). Is there a live SOAP library for Python? I'm sort of surprised that a common standard like SOAP is not more actively supported in Python. I'm probably missing something? Thanks, m -- http://mail.python.org/mailman/listinfo/python-list
[no subject]
-- http://mail.python.org/mailman/listinfo/python-list
Re: best way to serve wsgi with multiple processes
Robin wrote: .. Yes - I've done something very similar with ajp-wsgi (from the author of flup; and which incidently performs very well works really nicely) to go from apache -> wsgi. But the issue I'm asking about here is to have multiple WSGI processes - ie to allow concurrent execution of more than one web service at the time (since these are long running computational soap web services). ajp-wsgi embeds a single python interpreter so multiple running services would be effected by the GIL - I imagine flup is similar (a single process on the python side). So I'm not worried about decoupling from the web server - I'm happy to use pure python server (which I guess is easier to setup) - but I want the web server to dispatch requests to different processes running the wsgi app. I've looked at Spawning, but couldn't get it to work and it seems a little bit 'beta' for my taste (doesn't exit cleanly, leaves worker processes running etc.) well the flup server for fast cgi supports forking if the server is declared as an external process in apache. Then the top level of the flup process handles each request and passes it off to a forked worker. I cannot recall exactly, but I believe that apache mod_fastcgi does the right thing when it comes to internally declared fastcgi handlers. For apache at least I think the threading issues are handled properly. I think the preforkserver.py code handles all the threading issues for you (assuming it's not win32). -- Robin Becker -- http://mail.python.org/mailman/listinfo/python-list
Re: urllib2.Request:: http Request sending successfully, but Response contains in valid data.
Hi,
nRk wrote:
Hi
I am trying to send Data to a website through "http" using
"urllib.request" library using the bellow code.
Response status code contains. 200 (OK) but Response contains
nothing...
With same data When I test using C# it working fine.. Response
having.. some data in xml format.
But I am using below python code i am getting response only "".
This does not mean you are doing it identical to C# here, doesn't it?
Also you might be looking at the defaults in the calls within C#
and some weird expectations on server side.
Also you are requesting XML by sending a payload of XML data,
so you need to make sure you actually use POST and not GET.
I'd start by watching your working application with
strace or wireshark and compare with the data to and fro
from your python application.
Also I believe there should be example code for reading
RSS feeds from python.
Is there any in my code..
req = urllib2.Request(url) // url is valid url
req.add_header('Authorization','AuthSub token="x"')
req.add_header('Content-Type','application/atom+xml')
req.data=data // data is having valid xml data
r = urllib2.urlopen(req)
print(r.code) // output 200
print(r.msg) // output OK
print(r.read()) //
Regards
Tino
smime.p7s
Description: S/MIME Cryptographic Signature
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Re: best way to serve wsgi with multiple processes
On 2009-02-11 16:16, Diez B. Roggisch wrote: > Robin wrote: > >> On Feb 11, 1:28 pm, Robin wrote: >>> On Feb 11, 12:10 pm, Robin Becker wrote: >>> We've used forked fastcgi (flup) with success as that decouples the wsgi process (in our case django) from the main server (in our case apache). Our reasons for doing that were to allow the backend to use modern pythons without having to upgrade the server (which is required if using say mod_python). The wsgi process runs as an ordinary user which eases some tasks. >> I'm sorry - I originally missed the worked 'forked' and hence the >> whole point of your message I think. >> >> I looked at flup before but had forgotten about the forked version. >> Having revisited it I think the forked version does keep a process >> pool so each request is processed by a seperate process, which is >> exactly what I wanted. > > You can have that with mod_wsgi & daemon mode as well, with presumably less > setup hassle. Another option that works well on Unix and even Windows is SCGI which deals with the forking and piping of data for you: http://www.mems-exchange.org/software/scgi/ http://python.ca/scgi/ Lighttpd even ships with a mod_scgi module built-in. More on the protocol used by SCGI (basically net-strings): http://python.ca/scgi/protocol.txt Unlike FastCGI, it's very easy to setup. Since SCGI provides standard CGI on the Python side, it's easy to wrap this up as WSGI interface (using e.g. the code from PEP 333). -- Marc-Andre Lemburg eGenix.com Professional Python Services directly from the Source (#1, Feb 11 2009) >>> 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 our new mxODBC.Connect Python Database Interface 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://www.egenix.com/company/contact/ -- http://mail.python.org/mailman/listinfo/python-list
access to MS Access password-protected database?
Can anyone direct me towards a code snippet showing how to use Python to insert data into a password-protected MS Access database? My google searches have been uninformative for dbs that are password-protected. Thanks, Ken -- http://mail.python.org/mailman/listinfo/python-list
Re: access to MS Access password-protected database?
Ken McDonald wrote: Can anyone direct me towards a code snippet showing how to use Python to insert data into a password-protected MS Access database? My google searches have been uninformative for dbs that are password-protected. Caveat: I've never done it and I have no Access db to hand, but in a spirit of being helpful... According to this snippet: http://www.vb-helper.com/howto_ado_use_access_password.html it can be done via ADO. You can either roll your own, or you can use the adodbapi module from the pywin32 extensions. TJG -- http://mail.python.org/mailman/listinfo/python-list
Re: Process crash with no reason
On Feb 8, 5:31 pm, Stephen Hansen wrote: > > Thanks a lot and sorry for the late response. My main suspect is the > > CherryPy. > > I'm still investigating it. > > You're asking for advice but not listening to what people are saying > here -- why is CherryPy on the top of your list? > > What version of CherryPy is it? 1 or 2? > > If its 2, then its pure python and there's a really, really low chance > that its provoking a hard crash w/o a traceback printing before it > dies out. A hard crash which isn't printing an error message is > possible in pure Python I suppose, but I've never seen it. A "Bus > error" for example will kill the interpreter before it can do any > error handling. But I've only ever seen that when interfacing with > third party libraries. > > If its 1, there is some C so you can bump it up ... and for that I'd > probably attempt to run the application in a console or with stdout > manually redirected instead of relying on the logging alone, to see if > anything useful gets put out.. like "Bus error", at the time it exits. > > But why do you keep discarding the Sybase module? > > Its most definitely *not* written in python. What Philip and Tim were > trying to tell you is you are *not* using "python's functions to run > sybase sql commands" > > The Sybase module is a python wrapper around code written in C module > which is interfacing with a third party library to talk to Sybase. Are > you at the latest version of Sybase(0.39 if its the same module I'm > aware of?) How about the library underneath it? FreeTDS or Sybase ASE > (whatever that is) or whatever else is being used? A bug in /any/ of > those C layers (notice its *multiple* layers) could propagate up and > provoke a hard crash that Python doesn't catch. So if you look into > those versions perhaps one has a new release that fixes bugs. > > --S Hi, After farther investigation and some help from other developers, we got to the conclusion that the python process does not crash but the program exits because cherrypy freezes and the python program has nothing to do when the web service is not responding. My cherrypy version is 3.0.1 Can any of you help me with cherrypy or should I ask in cherrypy group? Thanks Gil -- http://mail.python.org/mailman/listinfo/python-list
Re: best way to serve wsgi with multiple processes
On Feb 11, 3:46 pm, Robin Becker wrote: > well the flup server for fast cgi supports forking if the server is declared > as > an external process in apache. Then the top level of the flup process handles > each request and passes it off to a forked worker. I cannot recall exactly, > but > I believe that apache mod_fastcgi does the right thing when it comes to > internally declared fastcgi handlers. For apache at least I think the > threading > issues are handled properly. > > I think the preforkserver.py code handles all the threading issues for you > (assuming it's not win32). Thanks - I think if I go the flup route I would use AJP though - since its very easy to setup with apache (1 proxy line) and mod_ajp comes as standard. And then everything is very much seperated from the apache process. -- http://mail.python.org/mailman/listinfo/python-list
Re: SOAP client
On Feb 11, 3:33 pm, mk wrote: > Hi, > > I'm trying to consume a SOAP web service using Python. So far I have > found two libraries: SOAPpy and ZSI. Both of them rely on PyXML which > is no longer maintained (and there is no build for 64bit Windows and > the setup.py doesn't seem to know how to build it on Windows). Is > there a live SOAP library for Python? I'm sort of surprised that a > common standard like SOAP is not more actively supported in Python. > I'm probably missing something? > > Thanks, > m For consuming services, I've found suds to be the best client: https://fedorahosted.org/suds/ For creating them, I've been using soaplib: http://trac.optio.webfactional.com/ HTH, Robin -- http://mail.python.org/mailman/listinfo/python-list
Re: Pycon 2009 Hotel?
On Feb 11, 9:17 am, jay graves wrote: > On Feb 11, 9:13 am, jay graves wrote: > > > I'm attending Pycon this year and for the first time I have to pay for > > myself. (All training/conference budgets have been zeroed out at my > > company.) > > > I would like to take the cheaper option by staying at the Crowne Plaza > > but as I understand it, the part of the conference I'll be attending > > will be held at the Hyatt Regency. I don't mind the walk but I also > > don't want to miss out on the open spaces in the evening. > > > Is anyone else similarly on the fence? I'd like to save $130 ((153 - > > 100) * 3) but since I'm not staying for the sprints and alot of my > > enjoyment of the conference is the open spaces. > > (Sorry. i hit 'Send' too quickly.) > > I'm wondering if I'm being 'penny-wise and pound-foolish'? I'd hate > to spend all that money to get there and then not enjoy it because I > was at the 'other' hotel. > > ... > Jay Graves As I understand it, the hotels are connected via a skywalk, so I don't think it will be a big deal either way. It just means a little extra walking. Mike -- http://mail.python.org/mailman/listinfo/python-list
Who's on First, IDLE or pythonWin? Dialog Problem?
My program in IDLE bombed with:
==
Exception in Tkinter callback
Traceback (most recent call last):
File "C:\Python25\lib\lib-tk\Tkinter.py", line 1403, in __call__
return self.func(*args)
File
"C:\Sandia_Meteors\New_Sentinel_Development\Sentuser_Utilities_Related\sentuser\sentuserNC25-Dev4.py",
line 552, in OperationalSettings
dialog = OperationalSettingsDialog( self.master, set_loc_dict )
File
"C:\Sandia_Meteors\New_Sentinel_Development\Sentuser_Utilities_Related\sentuser\sentuserNC25-Dev4.py",
line 81, in __init__
tkSimpleDialog.Dialog.__init__(self, parent)
File "C:\Python25\lib\lib-tk\tkSimpleDialog.py", line 69, in __init__
self.wait_visibility() # window needs to be visible for the grab
File "C:\Python25\lib\lib-tk\Tkinter.py", line 415, in wait_visibility
self.tk.call('tkwait', 'visibility', window._w)
TclError: window ".34672232" was deleted before its visibility changed
===
It runs fine in pythonWin performing the same entry operation. Open a menu,
select an item to open a dialog, select a select button in the dialog,
press OK to leave the dialog. Boom, as above.
(This does not mean pythonWin doesn't have problems of its own. ) If I just
execute the code (double click on the py file, the console shows no
problems. IDLE is unhappy.
Another side to this is that I use WinMerge to find differences between my
last saved copy and the current copy. I found the current copy had two lines
where a abc.get() was changed to abc.get. This was undoubtedly from briefly
using the pyWin editor, when I mis-hit some keys. Yet pyWin had no trouble
executing the program. My guess is that while briefly editing there, I hit
some odd combination of keys that produced, perhaps, an invisible character
that pyWin ignores.
Not the 34672232 window is a dialog that I closed by pressing OK. I would
again guess, that, if there is a problem, it occurs in the code that
destroys the dialog.
--
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(121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
Obz Site: 39° 15' 7" N, 121° 2' 32" W, 2700 feet
Web Page:
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Re: best way to serve wsgi with multiple processes
Robin wrote: On Feb 11, 3:46 pm, Robin Becker wrote: well the flup server for fast cgi supports forking if the server is declared as an external process in apache. Then the top level of the flup process handles each request and passes it off to a forked worker. I cannot recall exactly, but I believe that apache mod_fastcgi does the right thing when it comes to internally declared fastcgi handlers. For apache at least I think the threading issues are handled properly. I think the preforkserver.py code handles all the threading issues for you (assuming it's not win32). Thanks - I think if I go the flup route I would use AJP though - since its very easy to setup with apache (1 proxy line) and mod_ajp comes as standard. And then everything is very much seperated from the apache process. ... that's right and very easy to control. The only problem I recall is that the socket needs to be made readable by www. You can do that with a sudo chown or by setting up the mask at the ajp server start. -- Robin Becker -- http://mail.python.org/mailman/listinfo/python-list
Re: Escaping my own chroot...
On Wed, 11 Feb 2009 09:31:56 -0600, Nick Craig-Wood wrote: r0g wrote: I'm writing a linux remastering script in python where I need to chroot into a folder, run some system commands and then come out and do some tidying up, un-mounting proc & sys etc. I got in there with os.chroot() and I tried using that to get back out but that didn't work so... is my script trapped in there forever now or is there an un-hacky way to escape? No! If you still have root in the chroot (and you need root to get in there, so it's not implausible that you will), then you can get out. Googling for "escape chroot" turns up lots of hits. This page contains a fairly simple, explicit description of how to get out of a chroot: http://www.bpfh.net/simes/computing/chroot-break.html See the bulleted list in the "Breaking chroot()" section. Since you also control the process before the chroot happens, breaking out is even simpler in your case (just open / before you chroot in the first place). forking before doing the chroot may still be a good idea, but it's not the only solution. Jean-Paul -- http://mail.python.org/mailman/listinfo/python-list
Re: Who's on First, IDLE or pythonWin? Dialog Problem?
On Feb 11, 10:28 am, "W. eWatson" wrote:
> My program in IDLE bombed with:
> ==
> Exception in Tkinter callback
> Traceback (most recent call last):
> File "C:\Python25\lib\lib-tk\Tkinter.py", line 1403, in __call__
> return self.func(*args)
> File
> "C:\Sandia_Meteors\New_Sentinel_Development\Sentuser_Utilities_Related\sentuser\sentuserNC25-Dev4.py",
> line 552, in OperationalSettings
> dialog = OperationalSettingsDialog( self.master, set_loc_dict )
> File
> "C:\Sandia_Meteors\New_Sentinel_Development\Sentuser_Utilities_Related\sentuser\sentuserNC25-Dev4.py",
> line 81, in __init__
> tkSimpleDialog.Dialog.__init__(self, parent)
> File "C:\Python25\lib\lib-tk\tkSimpleDialog.py", line 69, in __init__
> self.wait_visibility() # window needs to be visible for the grab
> File "C:\Python25\lib\lib-tk\Tkinter.py", line 415, in wait_visibility
> self.tk.call('tkwait', 'visibility', window._w)
> TclError: window ".34672232" was deleted before its visibility changed
> ===
> It runs fine in pythonWin performing the same entry operation. Open a menu,
> select an item to open a dialog, select a select button in the dialog,
> press OK to leave the dialog. Boom, as above.
>
> (This does not mean pythonWin doesn't have problems of its own. ) If I just
> execute the code (double click on the py file, the console shows no
> problems. IDLE is unhappy.
>
> Another side to this is that I use WinMerge to find differences between my
> last saved copy and the current copy. I found the current copy had two lines
> where a abc.get() was changed to abc.get. This was undoubtedly from briefly
> using the pyWin editor, when I mis-hit some keys. Yet pyWin had no trouble
> executing the program. My guess is that while briefly editing there, I hit
> some odd combination of keys that produced, perhaps, an invisible character
> that pyWin ignores.
>
> Not the 34672232 window is a dialog that I closed by pressing OK. I would
> again guess, that, if there is a problem, it occurs in the code that
> destroys the dialog.
>
> --
> W. eWatson
>
> (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
> Obz Site: 39° 15' 7" N, 121° 2' 32" W, 2700 feet
>
> Web Page:
You don't really say what your code does or if it uses a GUI toolkit
and if so, which one. But my guess is that you are using some kind of
GUI and its GUI and IDLE's are clashing somehow. I see this sort of
thing with some of my wxPython programs from time to time, although
IDLE usually just crashes with no error message.
I would recommend using the command line or something that can open it
in a completely separate process, such as Wingware's IDE.
Mike
--
http://mail.python.org/mailman/listinfo/python-list
Re: Who's on First, IDLE or pythonWin? Dialog Problem?
W. eWatson wrote:
> My program in IDLE bombed with:
> ==
> Exception in Tkinter callback
> Traceback (most recent call last):
> File "C:\Python25\lib\lib-tk\Tkinter.py", line 1403, in __call__
> return self.func(*args)
> File
> "C:\Sandia_Meteors\New_Sentinel_Development\Sentuser_Utilities_Related\sentuser\sentuserNC25-Dev4.py",
> line 552, in OperationalSettings
> dialog = OperationalSettingsDialog( self.master, set_loc_dict )
> File
> "C:\Sandia_Meteors\New_Sentinel_Development\Sentuser_Utilities_Related\sentuser\sentuserNC25-Dev4.py",
> line 81, in __init__
> tkSimpleDialog.Dialog.__init__(self, parent)
> File "C:\Python25\lib\lib-tk\tkSimpleDialog.py", line 69, in __init__
> self.wait_visibility() # window needs to be visible for the grab
> File "C:\Python25\lib\lib-tk\Tkinter.py", line 415, in wait_visibility
> self.tk.call('tkwait', 'visibility', window._w)
> TclError: window ".34672232" was deleted before its visibility changed
> ===
> It runs fine in pythonWin performing the same entry operation. Open a
> menu, select an item to open a dialog, select a select button in the
> dialog, press OK to leave the dialog. Boom, as above.
>
> (This does not mean pythonWin doesn't have problems of its own. ) If I
> just execute the code (double click on the py file, the console shows no
> problems. IDLE is unhappy.
>
> Another side to this is that I use WinMerge to find differences between
> my last saved copy and the current copy. I found the current copy had
> two lines where a abc.get() was changed to abc.get. This was undoubtedly
> from briefly using the pyWin editor, when I mis-hit some keys. Yet pyWin
> had no trouble executing the program. My guess is that while briefly
> editing there, I hit some odd combination of keys that produced,
> perhaps, an invisible character that pyWin ignores.
>
> Not the 34672232 window is a dialog that I closed by pressing OK. I
> would again guess, that, if there is a problem, it occurs in the code
> that destroys the dialog.
>
>
Well you have to remember that you are trying to run a windowed GUI
under the control of another windows GUI, so it isn't surprising that
you hit trouble.
With IDLE the issue will be that IDLE already created a main window
before your program started running. With PythonWin you are using two
different toolkits, so it isn't really surprising that breaks down -
there will be two entirely separate main loops competing with each other.
regards
Steve
--
Steve Holden+1 571 484 6266 +1 800 494 3119
Holden Web LLC http://www.holdenweb.com/
--
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Could you recommend job schedulling solution?
I've sinlge 8-way node dedicated for executing long running tasks. To be able to execute multiple tasks on this node it shoud spawn each task in another process. At the same time it should accept network connection with new tasks without blocking of client and put it on job queue. What is "task" ? Executing just ordinary python function will be enough. If solution contain some client library which allow easy task submit it will be great. -- http://mail.python.org/mailman/listinfo/python-list
Re: Iterable Ctypes Struct
On Feb 10, 9:52 pm, "Gabriel Genellina"
wrote:
> En Wed, 11 Feb 2009 00:31:26 -0200, escribió:
>
> > I like the ability to access elements of a struct such as with ctypes
> > Structure:
> myStruct.elementName1
> > 4
>
> > What I like about it is there are no quotes needed.
>
> > What I don't like about it is that it's not iterable:
> for n in myStruct: <== gives error
> print n
>
> > I don't want to force the end user to have preknowledge of the element
> > names.
>
> Note that those names are available as the _fields_ class attribute
>
> > Has anyone subclassed ctypes Structure based class to be iterable?
> > Before a noob starts trying to do this, is it possible? How to
> > approach it?
>
> The easiest way would be to define __getitem__ accepting index 0, 1, 2...
> until the last defined field.
> Seehttp://docs.python.org/reference/datamodel.html#object.__getitem__
>
>
> from ctypes import Structure
>
> class IterableStructure(Structure):
> def __getitem__(self, i):
> if not isinstance(i, int):
> raise TypeError('subindices must be integers: %r' % i)
> return getattr(self, self._fields_[i][0])
>
>
>
> This was tested as much as you see here:
>
> py> from ctypes import c_int
> py>
> py> class POINT(IterableStructure):
> ... _fields_ = [("x", c_int),
> ... ("y", c_int)]
> ...
> py> point = POINT(10, 20)
> py> print point.x, point.y
> 10 20
> py> for field in point:
> ... print field
> ...
> 10
> 20
> py> print list(point)
> [10, 20]
>
> --
> Gabriel Genellina
Thanks very much, Gabriel. This is very good start for me.
This works for predefined class. How about a situation where the
fields are added dynamically (as from reading in from an xml file).
For example, if I were to now add another element:
>>> point.z = 30
>>> print list(point)
[10, 20]
>>> dir(point)
['__class__', '__ctypes_from_outparam__', '__delattr__', '__
dict__', '__doc__', '__getattribute__', '__getitem__', '__ha
sh__', '__init__', '__module__', '__new__', '__reduce__', '_
_reduce_ex__', '__repr__', '__setattr__', '__str__', '__weak
ref__', '_b_base_', '_b_needsfree_', '_fields_', '_objects',
'x', 'y', 'z']
I don't know why the iterator (where ever it is) didn't get
incremented. Thanks for any insight.
Mark
--
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Re: generator object or 'send' method?
On Feb 11, 4:41 am, greg wrote: > Aaron Brady wrote: > > It would receive the 'send' from a different point in control > > flow than its usual 'next'. Should it repeat a value if it receives a > > 'send'? > > No. This requirement clearly indicates that send() is > the wrong tool for the job. > > I would use a class with a generator as a method, e.g. > > class Multiples: > > m = 1 > > def set_multiplier(self, m): > self.m = m > > def generate(self, limit): > for i in xrange(limit): > yield i * self.m > > g = Multiples() > for x in g.generate(10): > print x > if x == 3: > g.set_multiplier(42) > > produces > > 0 > 1 > 2 > 3 > 168 > 210 > 252 > 294 > 336 > 378 > > -- > Greg Alright, but you don't have to go so far as to create an entire class. It's alright to use a formula. Here's a way to add a dictionary to a generator instance. def gen_dict( fun ): def inner( *ar, **kw ): self.gen= fun( self, *ar, **kw ) return self class GenWrapper: def __iter__( self ): return self def __next__( self, *ar, **kw ): return self.gen.__next__ ( *ar, **kw ) self= GenWrapper() return inner It's a shame that you can't set 'self.__next__= self.gen.__next__'. It costs an entire level of call depth. On the other hand, I'm not sure a pure delegate class is possible. The decorator just puts the generator object in a 'gen' attribute, and adds itself to the '__init__' argument list. So the generator has a 'self' argument, which is of type 'instance', and allows dynamic attributes. @gen_dict def jumper( self, N= 1, K= 1 ): self.N, self.K= N, K while 1: yield self.N self.N+= self.K j= jumper() print( next( j ) ) j.K= 4 print( next( j ) ) It might need some touch-ups to run in Python 2. Neat mix. It's a cool hybrid between Terry's and Greg's idea, and a bare generator. Unfortunately, if you want 'self' to have any methods, you'll probably need a class... though maybe it could inherit from 'GenWrapper'. What do you think? P.S. Here's a slightly simpler version. def gen_dict( fun ): class GenWrapper: def __init__( self, *ar, **kw ): self.gen= fun( self, *ar, **kw ) def __iter__( self ): return self def __next__( self, *ar, **kw ): return self.gen.__next__ ( *ar, **kw ) return GenWrapper P.P.S. Simpler, but a line longer. class GenWrapper: def __init__( self, fun ): self.fun= fun def __call__( self, *ar, **kw ): self.gen= self.fun( self, *ar, **kw ) return self def __iter__( self ): return self def __next__( self, *ar, **kw ): return self.gen.__next__( *ar, **kw ) -- http://mail.python.org/mailman/listinfo/python-list
RE: Could you recommend job schedulling solution?
hi... not sure exactly what you're looking for, but "condor" has a robust job scheduling architecture for dealing with grid/distributed setups over multiple systems.. give us more information, and there might be other suggestions! -Original Message- From: python-list-bounces+bedouglas=earthlink@python.org [mailto:python-list-bounces+bedouglas=earthlink@python.org]on Behalf Of redbaron Sent: Wednesday, February 11, 2009 9:01 AM To: python-list@python.org Subject: Could you recommend job schedulling solution? I've sinlge 8-way node dedicated for executing long running tasks. To be able to execute multiple tasks on this node it shoud spawn each task in another process. At the same time it should accept network connection with new tasks without blocking of client and put it on job queue. What is "task" ? Executing just ordinary python function will be enough. If solution contain some client library which allow easy task submit it will be great. -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: access to MS Access password-protected database?
On Feb 11, 10:43 am, Ken McDonald
wrote:
> Can anyone direct me towards a code snippet showing how to use Python
> to insert data into a password-protected MS Access database? My google
> searches have been uninformative for dbs that are password-protected.
>
> Thanks,
> Ken
You post is a little vague on specifics
- do you actually have access to the db ?
- can you open it with access ?
- can you currently read records using python ?
I am assuming you don't have access to the db through python, once you
do the rest is straight forward.
I use DSN-less connections. This link below is quite helpful
http://www.carlprothman.net/Default.aspx?tabid=90#ODBCDriverForAccess
If you aren't using the adodbapi (part of the pywin32 package), you
need to do something like this, assuming you access db is MS-Access
2000 and above.
import win32com
cnx = win32com.client.Dispatch('ADODB.connection')
parms = {}
parms['driver'] = '{Microsoft Access Driver (*.mdb)}'
parms['dbase'] = path_to_mdb
parms['sys_mdw'] = path_to_workgroup_security
parms['uid'] = userid_defined_in_mdw
parhs['pwd'] = pwd_for_uid_in_mdw
cnxtr = 'Driver=%(driver)s; DBQ=%(dbase)s; SYSTEMDB=%(sys_mdw)s; UID=%
(uid)s; PWD=%(pwd)s; ' % parms
cnx.ConnectionString = cnxstr
cnx.Open()
once you have an ADO Connection, execute SQL directly on the
connection like this
cnx.Execute('INSERT INTO tablename (col1, col2) VALUES ('val1,
val2);')
Or alternatively you should create RecordSets and manipulate these.
IF you need help understanding ADO I would recommend;
http://www.w3schools.com/ado/default.asp
The examples are translateable to Python.
You create recordsets via;
rs = win32com.client.Dispatch('ADO.RecordSet')
If you don't have/weren't given the passwords to the DB, but you do
have access to the workgroup file ('*.MDW') file that stores the uid/
pwds and permission, then there are several third party tools that
will recover these for you. Google is your friend.
If you don't have access to the original .mdw ... well, I can't help
you and I don't think anyone can.
Good luck.
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Re: SOAP client
On Wed, 11 Feb 2009 07:33:29 -0800, mk wrote: > I'm trying to consume a SOAP web service using Python. Suds (ibid) -- accept no substitute! -- http://mail.python.org/mailman/listinfo/python-list
Re: Iterable Ctypes Struct
On Feb 11, 9:01 am, mark.sea...@gmail.com wrote:
> On Feb 10, 9:52 pm, "Gabriel Genellina"
> wrote:
>
>
>
>
>
> > En Wed, 11 Feb 2009 00:31:26 -0200, escribió:
>
> > > I like the ability to access elements of a struct such as with ctypes
> > > Structure:
> > myStruct.elementName1
> > > 4
>
> > > What I like about it is there are no quotes needed.
>
> > > What I don't like about it is that it's not iterable:
> > for n in myStruct: <== gives error
> > print n
>
> > > I don't want to force the end user to have preknowledge of the element
> > > names.
>
> > Note that those names are available as the _fields_ class attribute
>
> > > Has anyone subclassed ctypes Structure based class to be iterable?
> > > Before a noob starts trying to do this, is it possible? How to
> > > approach it?
>
> > The easiest way would be to define __getitem__ accepting index 0, 1, 2...
> > until the last defined field.
> > Seehttp://docs.python.org/reference/datamodel.html#object.__getitem__
>
> >
> > from ctypes import Structure
>
> > class IterableStructure(Structure):
> > def __getitem__(self, i):
> > if not isinstance(i, int):
> > raise TypeError('subindices must be integers: %r' % i)
> > return getattr(self, self._fields_[i][0])
>
> >
>
> > This was tested as much as you see here:
>
> > py> from ctypes import c_int
> > py>
> > py> class POINT(IterableStructure):
> > ... _fields_ = [("x", c_int),
> > ... ("y", c_int)]
> > ...
> > py> point = POINT(10, 20)
> > py> print point.x, point.y
> > 10 20
> > py> for field in point:
> > ... print field
> > ...
> > 10
> > 20
> > py> print list(point)
> > [10, 20]
>
> > --
> > Gabriel Genellina
>
> Thanks very much, Gabriel. This is very good start for me.
> This works for predefined class. How about a situation where the
> fields are added dynamically (as from reading in from an xml file).
> For example, if I were to now add another element:
>
> >>> point.z = 30
> >>> print list(point)
> [10, 20]
> >>> dir(point)
>
> ['__class__', '__ctypes_from_outparam__', '__delattr__', '__
> dict__', '__doc__', '__getattribute__', '__getitem__', '__ha
> sh__', '__init__', '__module__', '__new__', '__reduce__', '_
> _reduce_ex__', '__repr__', '__setattr__', '__str__', '__weak
> ref__', '_b_base_', '_b_needsfree_', '_fields_', '_objects',
> 'x', 'y', 'z']
>
> I don't know why the iterator (where ever it is) didn't get
> incremented. Thanks for any insight.
>
> Mark- Hide quoted text -
>
> - Show quoted text -
I tinkered with it and think I have viable solution.
I need to append a new member to _fields_ before writing it,
then it seems to work.
>>> p._fields_.append(('z', c_int))
>>> point.z = 30
>>> print 'List:', list(p)
List: [10, 20, 30]
Awesome. Thanks!
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Unicode issue on Windows cmd line
Having issue on Windows cmd. > Python.exe >>>a = u'\xf0' >>>print a This gives a unicode error. Works fine in IDLE, PythonWin, and my Macbook but I need to run this from a windows batch. Character should look like this "ð". Please help! -- http://mail.python.org/mailman/listinfo/python-list
Re: Iterable Ctypes Struct
In last post, I mixed code w/ 'p' and 'point'. Should be:
>>> point._fields_.append(('z', c_int))
>>> point.z = 30
>>> print 'List:', list(point)
List: [10, 20, 30]
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Re: Could you recommend job schedulling solution?
On 11 фев, 20:26, "bruce" wrote: > hi... > > not sure exactly what you're looking for, but "condor" has a robust job > scheduling architecture for dealing with grid/distributed setups over > multiple systems.. > > give us more information, and there might be other suggestions! Condor, Globus or any other grid system looks like serious overkill for me. I need some sort of job manager, which accepts jobs from clients as pickled python functions and queues/executes them. Client side should be able to ask status of submitted job, their return value, ask to cancel job etc. -- http://mail.python.org/mailman/listinfo/python-list
Re: getopt index out of range
>because the traceback says the index is 0 and there's only one line with a 0 >in it! Indeed. Thank you. On Wed, Feb 11, 2009 at 7:11 AM, MRAB wrote: > Steve Holden wrote: >> >> Matthew Sacks wrote: >>> >>> Hi List, >>> I am getting an index out of range error when trying to parse with >>> getopt. >>> Probably something simple. Any suggestions are appreciated >>> >>> optlist, args = getopt.getopt(sys.argv[1:], 'h', ['connectPassword=', >>> 'adminServerURL=', 'action=', 'targets=', 'appDir=']) >>> >>> >>> #Assign Opts >>> connectPassword = optlist[0][1] >>> adminServerURL = optlist[1][1] >>> action = optlist[2][1] >>> targets = optlist[3][1] >>> appDir = optlist[4][1] >>> >>> #this statement never gets executed >>> print "Args: " + connectPassword + " " + adminServerURL + " " + action >>> + " " + targets + " " + appDir >>> >>> File "/home/msacks/untitled4.py", line 23, in ? >>> IndexError: index out of range: 0 >>> >> It might help a little if you made it more obvious which was line 23 ... >> > It a guess I'd say it was: > >connectPassword = optlist[0][1] > > because the traceback says the index is 0 and there's only one line with a 0 > in it! > >> The real problem, though, is a misunderstanding of what getopt.getopt() >> returns. The (option, value) pairs are only returned for options found >> in the command line, so you can't guarantee there'll be four. >> >> Set your values to defaults, then adjust for those for which an option >> is found in the list, as in the "typical usage" example in the Fine >> Manual. >> > -- > http://mail.python.org/mailman/listinfo/python-list > -- http://mail.python.org/mailman/listinfo/python-list
Re: Functional schmunctional...
On 10 Feb., 21:28, r0g wrote: > def inet2ip(n, l=[], c=4): > if c==0: return ".".join(l) > p = 256**( c-1 ) > l.append( str(n/p) ) > return inet2ip( n-(n/p)*p, l, c-1 ) > The results for 1 > iterations of each were as follows... > > 0.113744974136 seconds for old INET->IP method > 27.744112 seconds for new INET->IP method > > :-/ That's probably because your new function is broken: >>> def inet2ip(n, l=[], c=4): if c==0: return ".".join(l) p = 256**( c-1 ) l.append( str(n/p) ) return inet2ip( n-(n/p)*p, l, c-1 ) >>> inet2ip(0) '0.0.0.0' >>> inet2ip(0) '0.0.0.0.0.0.0.0' >>> inet2ip(0) '0.0.0.0.0.0.0.0.0.0.0.0' -- http://mail.python.org/mailman/listinfo/python-list
Re: zlib interface semi-broken
Paul Rubin wrote: Scott David Daniels writes: Seems like we may want to say things like, "synchronization points are too be silently ignored." That would completely break some useful possible applications, so should be avoided. No, I mean that we, _the_users_of_the_interface_, may want to say, That is, I'd like that behavior as an option. -Scott David Daniels scott.dani...@acm.org -- http://mail.python.org/mailman/listinfo/python-list
Re: zlib interface semi-broken
Paul Rubin wrote: Scott David Daniels writes: I suspect that is why such an interface never came up (If you can clone states, then you can say: "compress this, then use the resultant state to compress/decompress others." The zlib C interface supports something like that. It is just not exported to the python application. It should be. Right, we are gathering ideas we'd like to see available to the Python programmer in the new zlib / bz2 agglomeration that we are thinking of building / proposing. --Scott David Daniels scott.dani...@acm.org -- http://mail.python.org/mailman/listinfo/python-list
Re: zlib interface semi-broken
Scott David Daniels wrote: ... I've wanted to do some low-level (C-coded) search w/o bothering to create strings until a match Here's a more common use case: signature gathering on the contents. --Scott David Daniels scott.dani...@acm.org -- http://mail.python.org/mailman/listinfo/python-list
Re: Unicode issue on Windows cmd line
On Wed, 2009-02-11 at 10:35 -0800, jeffg wrote: > Having issue on Windows cmd. > > Python.exe > >>>a = u'\xf0' > >>>print a > > This gives a unicode error. > > Works fine in IDLE, PythonWin, and my Macbook but I need to run this > from a windows batch. > > Character should look like this "ð". > > Please help! You forgot to paste the error. -- http://mail.python.org/mailman/listinfo/python-list
Re: Who's on First, IDLE or pythonWin? Dialog Problem?
Mike Driscoll wrote:
On Feb 11, 10:28 am, "W. eWatson" wrote:
My program in IDLE bombed with:
==
Exception in Tkinter callback
Traceback (most recent call last):
File "C:\Python25\lib\lib-tk\Tkinter.py", line 1403, in __call__
return self.func(*args)
File
"C:\Sandia_Meteors\New_Sentinel_Development\Sentuser_Utilities_Related\sentuser\sentuserNC25-Dev4.py",
line 552, in OperationalSettings
dialog = OperationalSettingsDialog( self.master, set_loc_dict )
File
"C:\Sandia_Meteors\New_Sentinel_Development\Sentuser_Utilities_Related\sentuser\sentuserNC25-Dev4.py",
line 81, in __init__
tkSimpleDialog.Dialog.__init__(self, parent)
File "C:\Python25\lib\lib-tk\tkSimpleDialog.py", line 69, in __init__
self.wait_visibility() # window needs to be visible for the grab
File "C:\Python25\lib\lib-tk\Tkinter.py", line 415, in wait_visibility
self.tk.call('tkwait', 'visibility', window._w)
TclError: window ".34672232" was deleted before its visibility changed
===
It runs fine in pythonWin performing the same entry operation. Open a menu,
select an item to open a dialog, select a select button in the dialog,
press OK to leave the dialog. Boom, as above.
(This does not mean pythonWin doesn't have problems of its own. ) If I just
execute the code (double click on the py file, the console shows no
problems. IDLE is unhappy.
Another side to this is that I use WinMerge to find differences between my
last saved copy and the current copy. I found the current copy had two lines
where a abc.get() was changed to abc.get. This was undoubtedly from briefly
using the pyWin editor, when I mis-hit some keys. Yet pyWin had no trouble
executing the program. My guess is that while briefly editing there, I hit
some odd combination of keys that produced, perhaps, an invisible character
that pyWin ignores.
Note the 34672232 window is a dialog that I closed by pressing OK. I would
again guess, that, if there is a problem, it occurs in the code that
destroys the dialog.
You don't really say what your code does or if it uses a GUI toolkit
and if so, which one. But my guess is that you are using some kind of
GUI and its GUI and IDLE's are clashing somehow. I see this sort of
thing with some of my wxPython programs from time to time, although
IDLE usually just crashes with no error message.
I would recommend using the command line or something that can open it
in a completely separate process, such as Wingware's IDE.
Mike
Tkinter. Isn't just clicking on the py file enough to side step either of
the two? I did it and it worked fine. The code is for a GUI that has five or
so menus on the main window bar, and manipulates video that is downloaded
to it from a video camera. The problem occurs in a dialog in which a user
enters configuration values, like the time to start/stop the camera. As soon
as I press OK on the dialog the program dies as above. It wasn't doing that
at all for days despite some heavy editing. A WinMerge shows its quite
faithful to it's last working predecessor. That's how I found the get problem.
--
W. eWatson
(121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
Obz Site: 39° 15' 7" N, 121° 2' 32" W, 2700 feet
Web Page:
--
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Re: Who's on First, IDLE or pythonWin? Dialog Problem?
Steve Holden wrote:
W. eWatson wrote:
My program in IDLE bombed with:
==
Exception in Tkinter callback
Traceback (most recent call last):
File "C:\Python25\lib\lib-tk\Tkinter.py", line 1403, in __call__
return self.func(*args)
File
"C:\Sandia_Meteors\New_Sentinel_Development\Sentuser_Utilities_Related\sentuser\sentuserNC25-Dev4.py",
line 552, in OperationalSettings
dialog = OperationalSettingsDialog( self.master, set_loc_dict )
File
"C:\Sandia_Meteors\New_Sentinel_Development\Sentuser_Utilities_Related\sentuser\sentuserNC25-Dev4.py",
line 81, in __init__
tkSimpleDialog.Dialog.__init__(self, parent)
File "C:\Python25\lib\lib-tk\tkSimpleDialog.py", line 69, in __init__
self.wait_visibility() # window needs to be visible for the grab
File "C:\Python25\lib\lib-tk\Tkinter.py", line 415, in wait_visibility
self.tk.call('tkwait', 'visibility', window._w)
TclError: window ".34672232" was deleted before its visibility changed
===
It runs fine in pythonWin performing the same entry operation. Open a
menu, select an item to open a dialog, select a select button in the
dialog, press OK to leave the dialog. Boom, as above.
(This does not mean pythonWin doesn't have problems of its own. ) If I
just execute the code (double click on the py file, the console shows no
problems. IDLE is unhappy.
Another side to this is that I use WinMerge to find differences between
my last saved copy and the current copy. I found the current copy had
two lines where a abc.get() was changed to abc.get. This was undoubtedly
from briefly using the pyWin editor, when I mis-hit some keys. Yet pyWin
had no trouble executing the program. My guess is that while briefly
editing there, I hit some odd combination of keys that produced,
perhaps, an invisible character that pyWin ignores.
Not the 34672232 window is a dialog that I closed by pressing OK. I
would again guess, that, if there is a problem, it occurs in the code
that destroys the dialog.
Well you have to remember that you are trying to run a windowed GUI
under the control of another windows GUI, so it isn't surprising that
you hit trouble.
With IDLE the issue will be that IDLE already created a main window
before your program started running. With PythonWin you are using two
different toolkits, so it isn't really surprising that breaks down -
there will be two entirely separate main loops competing with each other.
regards
Steve
Not quite. I take down IDLE when I run pyWin, and vice versa.
--
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(121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
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Re: Replace unknow string varible in file.
Thanks to Vlastimil Brom for his example and r0g for his helpful attitude and hyperlinks I was able to made program do what was needed. Terry the comments in the html are not important I was just saying that if I could cover the undesired strings in html comment tags then they would not should up on a web browser viewing the file, lucky I get then erased also so the comments is not needed. I anyone wants I can post a pastebin the the full code that uses the regex's. -- http://mail.python.org/mailman/listinfo/python-list
openOffic, windows, and Python 2.5
Hi, OpenOffice 3 on windows uses python 2.3.x (I have no idea why). Does anyone know where I can get whatever is needed to get python 2.5 working. I don't want to learn how recompile openoffice because it has a steep learning curve and is just to much when I can just use M$ word. BTW using the openSUSE update to install openOffice3 uses my installed python. Maybe someone has already done the compile and is willing to share? Thanks in advance Johnf -- http://mail.python.org/mailman/listinfo/python-list
Re: Who's on First, IDLE or pythonWin? Dialog Problem?
W. eWatson wrote:
> Steve Holden wrote:
>> W. eWatson wrote:
>>> My program in IDLE bombed with:
>>> ==
>>> Exception in Tkinter callback
>>> Traceback (most recent call last):
>>> File "C:\Python25\lib\lib-tk\Tkinter.py", line 1403, in __call__
>>> return self.func(*args)
>>> File
>>> "C:\Sandia_Meteors\New_Sentinel_Development\Sentuser_Utilities_Related\sentuser\sentuserNC25-Dev4.py",
>>>
>>> line 552, in OperationalSettings
>>> dialog = OperationalSettingsDialog( self.master, set_loc_dict )
>>> File
>>> "C:\Sandia_Meteors\New_Sentinel_Development\Sentuser_Utilities_Related\sentuser\sentuserNC25-Dev4.py",
>>>
>>> line 81, in __init__
>>> tkSimpleDialog.Dialog.__init__(self, parent)
>>> File "C:\Python25\lib\lib-tk\tkSimpleDialog.py", line 69, in __init__
>>> self.wait_visibility() # window needs to be visible for the grab
>>> File "C:\Python25\lib\lib-tk\Tkinter.py", line 415, in wait_visibility
>>> self.tk.call('tkwait', 'visibility', window._w)
>>> TclError: window ".34672232" was deleted before its visibility changed
>>> ===
>>> It runs fine in pythonWin performing the same entry operation. Open a
>>> menu, select an item to open a dialog, select a select button in the
>>> dialog, press OK to leave the dialog. Boom, as above.
>>>
>>> (This does not mean pythonWin doesn't have problems of its own. ) If I
>>> just execute the code (double click on the py file, the console shows no
>>> problems. IDLE is unhappy.
>>>
>>> Another side to this is that I use WinMerge to find differences between
>>> my last saved copy and the current copy. I found the current copy had
>>> two lines where a abc.get() was changed to abc.get. This was undoubtedly
>>> from briefly using the pyWin editor, when I mis-hit some keys. Yet pyWin
>>> had no trouble executing the program. My guess is that while briefly
>>> editing there, I hit some odd combination of keys that produced,
>>> perhaps, an invisible character that pyWin ignores.
>>>
>>> Not the 34672232 window is a dialog that I closed by pressing OK. I
>>> would again guess, that, if there is a problem, it occurs in the code
>>> that destroys the dialog.
>>>
>>>
>> Well you have to remember that you are trying to run a windowed GUI
>> under the control of another windows GUI, so it isn't surprising that
>> you hit trouble.
>>
>> With IDLE the issue will be that IDLE already created a main window
>> before your program started running. With PythonWin you are using two
>> different toolkits, so it isn't really surprising that breaks down -
>> there will be two entirely separate main loops competing with each other.
>>
> Not quite. I take down IDLE when I run pyWin, and vice versa.
>
The two separate loops being PyWin (which uses MFC) and your program
(which uses Tkinter). You just can't mix GUIs in the same process like
that, sorry.
regards
Stedve
--
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Holden Web LLC http://www.holdenweb.com/
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Re: Unicode issue on Windows cmd line
On Feb 11, 2:35 pm, Albert Hopkins wrote: > On Wed, 2009-02-11 at 10:35 -0800, jeffg wrote: > > Having issue on Windows cmd. > > > Python.exe > > >>>a = u'\xf0' > > >>>print a > > > This gives a unicode error. > > > Works fine in IDLE, PythonWin, and my Macbook but I need to run this > > from a windows batch. > > > Character should look like this "ð". > > > Please help! > > You forgot to paste the error. The error looks like this: File " File "C:\python25\lib\encodings\cp437.py", line 12, in encode return codecs.charmap_encode(input,errors,encoding_map) UnicodeEncodeError: 'charmap' codec can't encode character u'\xf0' in position 0 : character maps to Running Python 2.5.4 on Windows XP -- http://mail.python.org/mailman/listinfo/python-list
Re: re.sub and named groups
> > Book recommendation: _Mastering Regular Expressions_, Jeffrey Friedl > -- > Aahz (a...@pythoncraft.com) <*> http://www.pythoncraft.com/ I wholeheartedly second this! The third edition is out now. -- http://mail.python.org/mailman/listinfo/python-list
hpw to convert a linux python script ?
hello, I've a python script, written for some Linux version, now I want to run it under windows. It complains of not finding files in /usr/share/tinybldLin/ where is the directory where the script is located and started from. As there are a whole lot of these lines, in a whole lot of files, I wonder if there's a simple trick to point /usr/share/tinybldLin/ to my directory ? thanks, Stef -- http://mail.python.org/mailman/listinfo/python-list
Re: zlib interface semi-broken
Scott David Daniels writes: > >> Seems like we may want to say things like, "synchronization points are > >> too be silently ignored." > No, I mean that we, _the_users_of_the_interface_, may want to say, > That is, I'd like that behavior as an option. I don't see any reason to want that (rather than letting the application handle it) but I'll take your word for it. -- http://mail.python.org/mailman/listinfo/python-list
Re: best way to serve wsgi with multiple processes
On Feb 11, 8:50 pm, Robin wrote: > Hi, > > I am building some computational web services using soaplib. This > creates a WSGI application. > > However, since some of these services are computationally intensive, > and may be long running, I was looking for a way to use multiple > processes. I thought about using multiprocessing.Process manually in > the service, but I was a bit worried about how that might interact > with a threaded server (I was hoping the thread serving that request > could just wait until the child is finished). Also it would be good to > keep the services as simple as possible so it's easier for people to > write them. > > I have at the moment the following WSGI structure: > TransLogger(URLMap(URLParser(soaplib objects))) > although presumably, due to the beauty of WSGI, this shouldn't matter. > > As I've found with all web-related Python stuff, I'm overwhelmed by > the choice and number of alternatives. I've so far been using cherrypy > and ajp-wsgi for my testing, but am aware of Spawning, twisted etc. > What would be the simplest [quickest to setup and fewest details of > the server required - ideally with a simple example] and most reliable > [this will eventually be 'in production' as part of a large scientific > project] way to host this sort of WSGI with a process-per-request > style? In this sort of situation one wouldn't normally do the work in the main web server, but have a separarte long running daemon process embedding mini web server that understands XML-RPC. The main web server would then make XML-RPC requests against the backend daemon process, which would use threading and or queueing to handle the requests. If the work is indeed long running, the backend process would normally just acknowledge the request and not wait. The web page would return and it would be up to user to then somehow occassionally poll web server, manually or by AJAX, to see how progres is going. That is, further XML-RPC requests from main server to backend daemon process asking about progress. I do't believe the suggestions about fastcgi/scgi/ajp/flup or mod_wsgi are really appropriate as you don't want this done in web server processes as then you are at mercy of web server processes being killed or dying when part way through something. Some of these systems will do this if requests take too long. Thus better to offload real work to another process. Graham -- http://mail.python.org/mailman/listinfo/python-list
Re: Could you recommend job schedulling solution?
Hi, 2009/2/11 redbaron : > should accept network > connection with new tasks without blocking of client and put it on job > queue. > > What is "task" ? Executing just ordinary python function will be > enough. If solution contain some client library which allow easy task > submit it will be great. I think parallel python will take of that for you (http://www.parallelpython.com/) -- http://soup.alt.delete.co.at http://www.xing.com/profile/Martin_Marcher http://www.linkedin.com/in/martinmarcher You are not free to read this message, by doing so, you have violated my licence and are required to urinate publicly. Thank you. Please avoid sending me Word or PowerPoint attachments. See http://www.gnu.org/philosophy/no-word-attachments.html -- http://mail.python.org/mailman/listinfo/python-list
Re: Unicode issue on Windows cmd line
On Wed, Feb 11, 2009 at 2:50 PM, jeffg wrote: > On Feb 11, 2:35 pm, Albert Hopkins wrote: > > On Wed, 2009-02-11 at 10:35 -0800, jeffg wrote: > > > Having issue on Windows cmd. > > > > Python.exe > > > >>>a = u'\xf0' > > > >>>print a > > > > > This gives a unicode error. > > > > > Works fine in IDLE, PythonWin, and my Macbook but I need to run this > > > from a windows batch. > > > > > Character should look like this "ð". > > > > > Please help! > > > > You forgot to paste the error. > > The error looks like this: >File " >File "C:\python25\lib\encodings\cp437.py", line 12, in encode > return codecs.charmap_encode(input,errors,encoding_map) > UnicodeEncodeError: 'charmap' codec can't encode character u'\xf0' in > position 0 > : character maps to > > > Running Python 2.5.4 on Windows XP That isn't a python problem, it's a Windows problem. For "compatibility reasons", Microsoft never added Unicode support to cmd. When you do print u'', python tries to convert the characters to the console encoding (the really old cp437, not even the Windows standard cp1252), it messes up. AFAIK, you'll have to use the chcp command to switch to an encoding that has the character and then print u'\xf0'.encode(the_encoding) to get it to display. There isn't any way around it- we've tried. > -- > http://mail.python.org/mailman/listinfo/python-list > -- http://mail.python.org/mailman/listinfo/python-list
Re: Unexpected string behaviour: txt = 'this' ' works'
On Feb 11, 5:16 am, bearophileh...@lycos.com wrote:
> christopher.saun...@durham.ac.uk (c d saunter):
>
> >I assume it is a feature of the compiler.<
>
> Yes it's a bug-prone antifeature that's probably a relic from C that
> doesn't have a concatenation operator among strings as Python does
> (+). So in Python it saves you to use + at the cost of possible bugs.
>
> Bye,
> bearophile
I've used this feature in C and Python when I want to wrap strings
without having a newlines in the strings... grouping the whole bunch
with a set of parenthesis to make the concatenation explicit.
Admittedly, I wouldn't be broken up if this feature became deprecated,
as
It does do a minor optimization in Python and most C compilers. The
two string constants are concatenated when the code is parsed, rather
than when the code is executed.
>>> from dis import dis
>>> def f():
... return 'This is ' 'an example.'
...
>>> dis(f)
2 0 LOAD_CONST 1 ('This is an example.')
3 RETURN_VALUE
>>>
It's such a minor optimization, that you probably wouldn't see any
effect on your program.
--Jason
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Re: Unicode issue on Windows cmd line
On Wed, Feb 11, 2009 at 2:50 PM, jeffg wrote: > On Feb 11, 2:35 pm, Albert Hopkins wrote: > > On Wed, 2009-02-11 at 10:35 -0800, jeffg wrote: > > > Having issue on Windows cmd. > > > > Python.exe > > > >>>a = u'\xf0' > > > >>>print a > > > > > This gives a unicode error. > > > > > Works fine in IDLE, PythonWin, and my Macbook but I need to run this > > > from a windows batch. > > > > > Character should look like this "ð". > > > > > Please help! > > > > You forgot to paste the error. > > The error looks like this: >File " >File "C:\python25\lib\encodings\cp437.py", line 12, in encode > return codecs.charmap_encode(input,errors,encoding_map) > UnicodeEncodeError: 'charmap' codec can't encode character u'\xf0' in > position 0 > : character maps to > > > Running Python 2.5.4 on Windows XP > First, you may need to change your command prompt Properties->Font to use Lucida Console rather than raster fonts. Then you'll need to change the code page using chcp to something that has a mapping for the character you want. E.g.: D:\>chcp Active code page: 437 D:\>python Python 2.5.2 (r252:60911, Feb 21 2008, 13:11:45) [MSC v.1310 32 bit (Intel)] on win32 Type "help", "copyright", "credits" or "license" for more information. >>> a = u'\xf0' >>> print a Traceback (most recent call last): File "", line 1, in File "D:\bin\Python2.5.2\lib\encodings\cp437.py", line 12, in encode return codecs.charmap_encode(input,errors,encoding_map) UnicodeEncodeError: 'charmap' codec can't encode character u'\xf0' in position 0: character maps to >>> quit() D:\>chcp 1252 Active code page: 1252 D:\>python Python 2.5.2 (r252:60911, Feb 21 2008, 13:11:45) [MSC v.1310 32 bit (Intel)] on win32 Type "help", "copyright", "credits" or "license" for more information. >>> a = u'\xf0' >>> print a ð >>> quit() D:\> (Just changing the code page works to avoid the UnicodeEncodeError, but with raster fonts that character displays as thee horizontal bars.) Karen -- http://mail.python.org/mailman/listinfo/python-list
Re: access to MS Access password-protected database?
Sorry for the vagueness.
I do have access to the file and can open it using Access. I haven't
yet done anything involving Python and Access (or Python and Win
interfacing, for that matter.)
Thanks,
Ken
On Feb 11, 2009, at 12:01 PM, imageguy wrote:
On Feb 11, 10:43 am, Ken McDonald
wrote:
Can anyone direct me towards a code snippet showing how to use Python
to insert data into a password-protected MS Access database? My
google
searches have been uninformative for dbs that are password-protected.
Thanks,
Ken
You post is a little vague on specifics
- do you actually have access to the db ?
- can you open it with access ?
- can you currently read records using python ?
I am assuming you don't have access to the db through python, once you
do the rest is straight forward.
I use DSN-less connections. This link below is quite helpful
http://www.carlprothman.net/Default.aspx?tabid=90#ODBCDriverForAccess
If you aren't using the adodbapi (part of the pywin32 package), you
need to do something like this, assuming you access db is MS-Access
2000 and above.
import win32com
cnx = win32com.client.Dispatch('ADODB.connection')
parms = {}
parms['driver'] = '{Microsoft Access Driver (*.mdb)}'
parms['dbase'] = path_to_mdb
parms['sys_mdw'] = path_to_workgroup_security
parms['uid'] = userid_defined_in_mdw
parhs['pwd'] = pwd_for_uid_in_mdw
cnxtr = 'Driver=%(driver)s; DBQ=%(dbase)s; SYSTEMDB=%(sys_mdw)s; UID=%
(uid)s; PWD=%(pwd)s; ' % parms
cnx.ConnectionString = cnxstr
cnx.Open()
once you have an ADO Connection, execute SQL directly on the
connection like this
cnx.Execute('INSERT INTO tablename (col1, col2) VALUES ('val1,
val2);')
Or alternatively you should create RecordSets and manipulate these.
IF you need help understanding ADO I would recommend;
http://www.w3schools.com/ado/default.asp
The examples are translateable to Python.
You create recordsets via;
rs = win32com.client.Dispatch('ADO.RecordSet')
If you don't have/weren't given the passwords to the DB, but you do
have access to the workgroup file ('*.MDW') file that stores the uid/
pwds and permission, then there are several third party tools that
will recover these for you. Google is your friend.
If you don't have access to the original .mdw ... well, I can't help
you and I don't think anyone can.
Good luck.
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Clearing the keyboard buffer (wxPython)
Platform: MSW (XP) Python 2.5 wxPython 2.8 Topic: Clear Keyboard buffer Hi, I hope I am not off topic asking a wxpython question. I'm writing a Score counter for Dart games. The software shows graphical output on a Canvas and accepts keyboard input (no buttons, no widgest). A stripped version looks like that: self.Bind(wx.EVT_CHAR,OnKeyEvent) . . #-- def OnKeyEvent(self, event): k =event.GetKeyCode() try: z=chr(k) except: return if (z in ["0","1","2","3","4","5","6","7","8","9",.."\r"..]: self.keystr +=z score=self.CalculateScore(self.keystr) self.DisplayScore(score) . . if z== "\r" #enter self.SayScore(score) self.NextPlayer() #-- def SayScore(self,number): if number > 100: a=os.path.join(self.wavpath,"100.wav") b=os.path.join(self.wavpath,"%i.wav"%(number-100)) else: a=os.path.join(self.wavpath,"%i.wav"%(number)) b="" sound1 = wx.Sound(a) sound2 = wx.Sound(b) sound1.Play(wx.SOUND_SYNC) if b: sound2.HurryupandPlay(wx.SOUND_SYNC) #-- The problem is, that during the voice output all keystrokes are buffered somewhere and are processed when SayScore is finished. So I have to clear the keyboard buffer at the end of SayScore. Something like: evt=MagicFetchPendingKeyEventFunction() while evt: evt=MagicFetchPendingKeyEventFunction() I was thinking about threading (maybe using delayedresults), but this might be a little oversized for my problem. Playing the sound ASYNC doesn't work here. Any ideas? Thanks in advance Marcus -- http://mail.python.org/mailman/listinfo/python-list
Re: best way to serve wsgi with multiple processes
GAE (Google App Engine) uses WSGI for webapps. You don't have to overhead of managing a server and all it's services this way as well. Just manage dns entries. Although, there are limitations depending on your project needs of what libs you need to use. appengine.google.com -Alex Goretoy http://www.goretoy.com On Wed, Feb 11, 2009 at 1:59 PM, Graham Dumpleton < graham.dumple...@gmail.com> wrote: > On Feb 11, 8:50 pm, Robin wrote: > > Hi, > > > > I am building some computational web services using soaplib. This > > creates a WSGI application. > > > > However, since some of these services are computationally intensive, > > and may be long running, I was looking for a way to use multiple > > processes. I thought about using multiprocessing.Process manually in > > the service, but I was a bit worried about how that might interact > > with a threaded server (I was hoping the thread serving that request > > could just wait until the child is finished). Also it would be good to > > keep the services as simple as possible so it's easier for people to > > write them. > > > > I have at the moment the following WSGI structure: > > TransLogger(URLMap(URLParser(soaplib objects))) > > although presumably, due to the beauty of WSGI, this shouldn't matter. > > > > As I've found with all web-related Python stuff, I'm overwhelmed by > > the choice and number of alternatives. I've so far been using cherrypy > > and ajp-wsgi for my testing, but am aware of Spawning, twisted etc. > > What would be the simplest [quickest to setup and fewest details of > > the server required - ideally with a simple example] and most reliable > > [this will eventually be 'in production' as part of a large scientific > > project] way to host this sort of WSGI with a process-per-request > > style? > > In this sort of situation one wouldn't normally do the work in the > main web server, but have a separarte long running daemon process > embedding mini web server that understands XML-RPC. The main web > server would then make XML-RPC requests against the backend daemon > process, which would use threading and or queueing to handle the > requests. > > If the work is indeed long running, the backend process would normally > just acknowledge the request and not wait. The web page would return > and it would be up to user to then somehow occassionally poll web > server, manually or by AJAX, to see how progres is going. That is, > further XML-RPC requests from main server to backend daemon process > asking about progress. > > I do't believe the suggestions about fastcgi/scgi/ajp/flup or mod_wsgi > are really appropriate as you don't want this done in web server > processes as then you are at mercy of web server processes being > killed or dying when part way through something. Some of these systems > will do this if requests take too long. Thus better to offload real > work to another process. > > Graham > -- > http://mail.python.org/mailman/listinfo/python-list > -- http://mail.python.org/mailman/listinfo/python-list
Re: hpw to convert a linux python script ?
On Feb 11, 7:58 pm, Stef Mientki wrote: > As there are a whole lot of these lines, in a whole lot of files, > I wonder if there's a simple trick to point > /usr/share/tinybldLin/ > to my directory ? > > thanks, > Stef Find and replace? -- http://mail.python.org/mailman/listinfo/python-list
Re: hpw to convert a linux python script ?
Alec Schueler wrote: On Feb 11, 7:58 pm, Stef Mientki wrote: As there are a whole lot of these lines, in a whole lot of files, I wonder if there's a simple trick to point /usr/share/tinybldLin/ to my directory ? thanks, Stef Find and replace? well I was thinking of a more elegant way, so the scripts remains, or better become multi-platform. anyway thanks, Stef -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: Clearing the keyboard buffer (wxPython)
On Feb 11, 2:28 pm, "MarcusD" wrote: > Platform: MSW (XP) Python 2.5 wxPython 2.8 > Topic: Clear Keyboard buffer > > Hi, > I hope I am not off topic asking a wxpython question. > I'm writing a Score counter for Dart games. The software > shows graphical output on a Canvas and accepts keyboard > input (no buttons, no widgest). A stripped version looks > like that: > > self.Bind(wx.EVT_CHAR,OnKeyEvent) > . > . > #-- > def OnKeyEvent(self, event): > k =event.GetKeyCode() > try: > z=chr(k) > except: > return > if (z in ["0","1","2","3","4","5","6","7","8","9",.."\r"..]: > self.keystr +=z > score=self.CalculateScore(self.keystr) > self.DisplayScore(score) > . > . > if z== "\r" #enter > self.SayScore(score) > self.NextPlayer() > #-- > def SayScore(self,number): > if number > 100: > a=os.path.join(self.wavpath,"100.wav") > b=os.path.join(self.wavpath,"%i.wav"%(number-100)) > else: > a=os.path.join(self.wavpath,"%i.wav"%(number)) > b="" > sound1 = wx.Sound(a) > sound2 = wx.Sound(b) > sound1.Play(wx.SOUND_SYNC) > if b: > sound2.HurryupandPlay(wx.SOUND_SYNC) > #-- > > The problem is, that during the voice output all keystrokes > are buffered somewhere and are processed when SayScore is > finished. So I have to clear the keyboard buffer at the end > of SayScore. Something like: > > evt=MagicFetchPendingKeyEventFunction() > while evt: > evt=MagicFetchPendingKeyEventFunction() > > I was thinking about threading (maybe using delayedresults), but > this might be a little oversized for my problem. > Playing the sound ASYNC doesn't work here. > > Any ideas? > Thanks in advance > Marcus It's fine to post here with wxPython questions, but I would recommend the official wxPython mailing list in most cases as it has lots of experienced users and developers on it: http://wxpython.org/maillist.php I've never done this sort of thing with wxPython, but you may be able to use wx.Yield somehow. There are various tips and tricks in the wiki about working around long running processes that block the GUI's mainloop here: http://wiki.wxpython.org/LongRunningTasks Other than that, I would recommend doing this with pygame or pyglet as they might be easier to use for this use-case. Here are their sites: http://www.pyglet.org/ http://www.pygame.org/news.html HTH Mike -- http://mail.python.org/mailman/listinfo/python-list
Re: Clearing the keyboard buffer (wxPython)
Whow. Thanks for the fast and comprehensive answer. To be honest I would have posted to wxpython.org but the server seems to be down for the last couple of days. I'll check this wx.Yield thing that I never heard of. And let's see what else we get here. Thanks again marcus -- http://mail.python.org/mailman/listinfo/python-list
Re: Unicode issue on Windows cmd line
> Having issue on Windows cmd. >> Python.exe a = u'\xf0' print a > > This gives a unicode error. > > Works fine in IDLE, PythonWin, and my Macbook but I need to run this > from a windows batch. > > Character should look like this "ð". > > Please help! Well, your terminal just cannot display this character by default; you need to use a different terminal program, or reconfigure your terminal. For example, do chcp 1252 and select Lucida Console as the terminal font, then try again. Of course, this will cause *different* characters to become non-displayable. Regards, Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: Unexpected string behaviour: txt = 'this' ' works'
Jason:
> It's such a minor optimization, that you probably wouldn't see any
> effect on your program.
>>> from dis import dis
>>> def f():
... return 'This is ' + 'an example.'
...
>>> dis(f)
2 0 LOAD_CONST 3 ('This is an example.')
3 RETURN_VALUE
Bye,
bearophile
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Re: hpw to convert a linux python script ?
Stef Mientki wrote: > Alec Schueler wrote: > > On Feb 11, 7:58 pm, Stef Mientki wrote: > > > >> As there are a whole lot of these lines, in a whole lot of files, > >> I wonder if there's a simple trick to point > >> /usr/share/tinybldLin/ > >> to my directory ? > >> > >> thanks, > >> Stef > >> > > > > Find and replace? > > > well I was thinking of a more elegant way, > so the scripts remains, or better become multi-platform. > > anyway thanks, Well, you'll have to rewrite the script so that it doesn't make assumptions about path names, and we can't help you with that without seeing some of the script code. There _might_ be easy fixes, but if the path is hardcoded in many places in the script...then you will just have to go through and un-hard-code it. --RDM -- http://mail.python.org/mailman/listinfo/python-list
Re: hpw to convert a linux python script ?
On Wed, Feb 11, 2009 at 3:48 PM, Stef Mientki wrote: > Alec Schueler wrote: > >> On Feb 11, 7:58 pm, Stef Mientki wrote: >> >> >>> As there are a whole lot of these lines, in a whole lot of files, >>> I wonder if there's a simple trick to point >>> /usr/share/tinybldLin/ >>> to my directory ? >>> >>> thanks, >>> Stef >>> >>> >> >> Find and replace? >> >> > well I was thinking of a more elegant way, > so the scripts remains, or better become multi-platform. That's the problem with using external files- unless you can get to the file by some combination of os and os.path functions, you're pretty much stuck checking os.name and/or sys.platform and choosing filenames based on that. -- http://mail.python.org/mailman/listinfo/python-list
Re: re.sub and named groups
On Feb 4, 10:51 am, "Emanuele D'Arrigo" wrote:
> Hi everybody,
>
> I'm having a ball with the power of regular expression
Don't forget the ball you can have with the power of ordinary Python
strings, string methods, and string interpolation!
originalString = "spam:%(first)s ham:%(second)s"
print originalString % { "first" : "foo" , "second" : "" }
prints
spam:foo ham:
with far fewer surprises and false steps. (Note: Py3K supports this
same feature, but with different interpolation syntax, which I have
not learned yet.)
Book recommendation: Text Processing in Python, by David Mertz (free
online - http://gnosis.cx/TPiP/), in which David advises against
dragging out the RE heavy artillery until you've at least thought
about using ordinary string methods.
-- Paul
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Re: Clearing the keyboard buffer (wxPython)
On Feb 11, 2:54 pm, "MarcusD" wrote: > Whow. Thanks for the fast and comprehensive answer. To be honest I would > have posted to wxpython.org but the server seems to be down for the last > couple of days. > > I'll check this wx.Yield thing that I never heard of. And let's see what > else we get here. > Thanks again > marcus Is it? I wondered why I had suddenly stopped getting emails from them, but my company recently had some email config changes that blocked a ton of stuff and I just figured that was part of the problem. Hopefully Robin Dunn can put the smack down on his web hosts... Mike -- http://mail.python.org/mailman/listinfo/python-list
Re: Unicode issue on Windows cmd line
On Wed, Feb 11, 2009 at 3:57 PM, "Martin v. Löwis" wrote: > > Having issue on Windows cmd. > >> Python.exe > a = u'\xf0' > print a > > > > This gives a unicode error. > > > > Works fine in IDLE, PythonWin, and my Macbook but I need to run this > > from a windows batch. > > > > Character should look like this "ð". > > > > Please help! > > Well, your terminal just cannot display this character by default; you > need to use a different terminal program, or reconfigure your terminal. > > For example, do > > chcp 1252 > > and select Lucida Console as the terminal font, then try again. > > Of course, this will cause *different* characters to become > non-displayable. Well, > > > Regards, > Martin > -- > http://mail.python.org/mailman/listinfo/python-list > -- http://mail.python.org/mailman/listinfo/python-list
Re: Unicode issue on Windows cmd line
On Wed, Feb 11, 2009 at 4:10 PM, Benjamin Kaplan wrote: > > > On Wed, Feb 11, 2009 at 3:57 PM, "Martin v. Löwis" wrote: > >> > Having issue on Windows cmd. >> >> Python.exe >> a = u'\xf0' >> print a >> > >> > This gives a unicode error. >> > >> > Works fine in IDLE, PythonWin, and my Macbook but I need to run this >> > from a windows batch. >> > >> > Character should look like this "ð". >> > >> > Please help! >> >> Well, your terminal just cannot display this character by default; you >> need to use a different terminal program, or reconfigure your terminal. >> >> For example, do >> >> chcp 1252 >> >> and select Lucida Console as the terminal font, then try again. >> >> Of course, this will cause *different* characters to become >> non-displayable. > > > Well, > Whoops. Didn't mean to hit send there. I was going to say, you can't have everything when Microsoft is only willing to break the programs that average people are going to use on a daily basis. I mean, why would they do something nice for the international community at the expense of breaking some 20 year old batch scripts? Those were the only things that still worked when Vista first came out. >> >> Regards, >> Martin >> -- >> http://mail.python.org/mailman/listinfo/python-list >> > > -- http://mail.python.org/mailman/listinfo/python-list
Re: Avoiding argument checking in recursive calls
andrew cooke wrote:
Terry Reedy wrote:
Reverse the test order
def fact(n):
if n > 0: return fact(n-1)*n
if n == 0: return 1
raise ValueError
sweet! but is this generally possible?
I believe so, for some meaning of 'generally'.
> ie: did you think this up for
this question or is it an idiom that you find yourself using often?
It is an idiom I developed for an algorithm book-in-progress that will
include detailed comparisons of 'body' recursive (my term for 'not tail
recursive", such as fact() above), tail recursive, and iterative
versions of algorithms.
Here are written-for-didactic-purposes tail and iterative versions of
fact that are computationally equivalent to the above in that they
compute the same expression, (...((1*1)*2)**n), without commutative
or associative transformation, and raise the same error (expanded).
def fact_tail(n, i=0, res=1):
if i < n: return fact_tail(n, i+1, res*(i+1))
if i == n: return res
raise ValueError("Input negative or non-integral")
def fact_iter(n, i=0, res=1):
while i < n: i,res = i+1, res*(i+1)
if i == n: return res
raise ValueError("Input negative or non-integral")
My original reason for writing the tail recursion in the same reversed
order was to make the conversion to iteration as obvious as possible.
But I them noticed that it also made possible 'test once for bad input
without a separate function."
Terry Jan Reedy
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Re: hpw to convert a linux python script ?
On Feb 12, 7:48 am, Stef Mientki wrote: > Alec Schueler wrote: > > On Feb 11, 7:58 pm, Stef Mientki wrote: > > >> As there are a whole lot of these lines, in a whole lot of files, > >> I wonder if there's a simple trick to point > >> /usr/share/tinybldLin/ > >> to my directory ? > > >> thanks, > >> Stef > > > Find and replace? > > well I was thinking of a more elegant way, > so the scripts remains, or better become multi-platform. Your current setup is not even single-platform portable ... consider the scenario where some Linux admin wants your gear to live in some directory other than /usr/share/tinybldLin/ The standard technique for ensuring that kind of portability involves: 1. Find the directory in which your script lives. Inspect sys.argv[0], use some os.path.some_functionality() to extract the directory, name it (say) home_base. 2. When you want to open a data file in the script's directory, do this: the_path = os.path.join(home_base, 'stef1.dat') f = open(the_path, .) NOTE: Use os.path.join() instead of some DIY technique; it knows better than you what the path separator is on the OS it's being run on. In fact, read the whole of the os.path manual carefully before you jump in to changing your code. If you prefer to have the data files in (say) .../script_locn/data instead of .../script_locn, the adjustment should be obvious. Unfortunately, you are still going to need use find and replace to fix your script. Code in haste, repent at leisure :-) HTH, John -- http://mail.python.org/mailman/listinfo/python-list
