Re: Python becoming less Lisp-like
Op 2005-03-18, Jeff Shannon schreef [EMAIL PROTECTED]: Antoon Pardon wrote: Op 2005-03-16, Jeff Shannon schreef [EMAIL PROTECTED]: Bruno Desthuilliers wrote: - if x is a class attribute of class A and a is an instance of A, a.x=anyvalue create a new instance attribute x instead of modifying A.x This is very consistent with the way that binding a name in any scope will shadow any bindings of that name in higher scopes. It is the same principle by which one is able to use the same name for a function-local variable that is used for a global variable, without destroying that global variable. [...] Not entirely. The equivallent is imposible in function scope. If function scope would work exactly equivallent as the above the following should work a = 42 def f(): a = a + 1 print a print a And the result should be: 43 42 I'd still say that the name binding rules are very consistent. The name lookup rules are a little different (as they *should* be for class/instance attributes), Why should they? and that's why there's a different net effect (UnboundLocalError) as shown in your example. I'd say, however, that if there's a special case here it's with the function-local variables, not the class/instance attributes. Which is the special case and which is the normal case is not that important here. The fact is that they behave different, so you can't claim it is very consistent. I'm getting the impression that 'consistent' just means: that is how python works, on this newsgroup. It's the optimizations to the function-local namespace which prevent transparent re-binding of global names. And given that the function-local namespace is by far the most heavily used, and the relative utility (and wisdom) of using globals in this way, this is a case where the benefit of the special case is well worth the cost of its slight inconsistency. I find it odd that you start by saying you still find them very consistent and here state there is a slight inconsistency. It seems we mean different things with very consistent -- Antoon Pardon -- http://mail.python.org/mailman/listinfo/python-list
Re: Text-to-speech
Hello Charles, Does anyone know of a cross-platform (OSX and Windows at least) library for text-to-speech? I know there's an OSX API, and probably also for Windows. I know PyTTS exists, but it seems to talk only to the Windows engine. I'd like to write a single Python module to handle this on both platforms, but I guess I'm asking too much -- it's too hardware dependent, I suppose. Any hints? Maybe you can bind Festival (http://www.cstr.ed.ac.uk/projects/festival/download.html) with SWIG. HTH. -- Miki Tebeka [EMAIL PROTECTED] http://tebeka.bizhat.com The only difference between children and adults is the price of the toys pgpPzYcyektit.pgp Description: PGP signature -- http://mail.python.org/mailman/listinfo/python-list
missing? dictionary methods
Well at least I find them missing. For the moment I frequently come across the following cases. 1) Two files, each with key-value pairs for the same dictionary. However it is an error if the second file contains a key that was not in the first file. In treating the second file I miss a 'set' method. dct.set(key, value) would be equivallent to dct[key] = value, except that it would raise a KeyError if the key wasn't already in the dictionary. 2) One file with key-value pairs. However it is an error if a key is duplicated in the file. In treating such files I miss a 'make' method. dct.make(key, value) would be equivallent to dct[key] = value. except that it would raise a KeyError if the key was already in the dictionary. What do other people think about this? -- Antoon Pardon -- http://mail.python.org/mailman/listinfo/python-list
Re: simultaneous copy to multiple media
Try this: http://mastermind.com.pl/multicopy/ This is small tool I've wrote, that does use large memory buffers with asynchronous I/O to copy file. Thank you! This (with a drawback of blocking the entire system) does it! ( dzieñ dobry i dziêkujê za t± konstruktywn± odpowied¼ na moje pytanie ) At least I know, that it works and you explain how it works, so I am now quite sure, that it will be also possible to have a Python tool which does the same thing. This way the discussion going towards driver hacking for the USB access was in my case just the wrong way, but anyway, thanks also for that to the contributors, because it sharpened my understanding of USB. Here my current test results on my Windows 2000 system with a 2.8 GHz P4 CPU and two 5 1/4 IDE-USB 2.0 casings (I have got from http://www.computeruniverse.net/ a German online shop, article no.: 90052509) by the way: does someone know an IDE-USB case able to perform data transfer faster than the max. 20 MByte/s I experience with one of my another IDE-USB 5 1/4 casings? ? ) : Single file copy: USB-1 to USB-2 = 11 MB/s, max. 70% CPU USB-2 to USB-1 = 11 MB/s, max. 70% CPU E-IDE to USB-1 = 12 MB/s, max. 70% CPU (first time) E-IDE to USB-1 = 13 MB/s, max. 70% CPU (second time same file) E-IDE to E-IDE = max. 45 MB/s (two physical drives) Simultaneous file copy: USB-1 to USB-2 = 5 MB/s USB-2 to USB-1 = 7 MB/s --- 12 MB/s, max. 80% CPU Simultaneous file copy using http://mastermind.com.pl/multicopy/release/1.0.0/multicopy.exe : E-IDE to USB-1 = 10 MB/s E-IDE to USB-2 = 10 MB/s --- 20 MB/s, unknown CPU load (1) (1) work with the PC during copying not possible, system hangs from 5 to 15 seconds between e.g. displaying current system time (with Windows clock). From my point of view this thread has reached its end (I have a solution I can live with), except if someone would like to contribute or point to a better multicopy.exe which does not block the system or best to contribute or point to a _Python_ script or module which is able to find out the optimal buffer size for copying on the current system (and the best way of copying files), so that after this information is saved in an .INI file the tool is best adopted to the system it works on. I am quite sure, that there is a perfect ready-to-use solution out there (up to now I just only failed to find one by Googling, e.g. the tee.exe provided by http://unxutils.sourceforge.net/ doesn't work with large files at all), so please don't hesitate to provide it, so, that I don't need to reinvent the wheel. Claudio Jacek Trzmiel [EMAIL PROTECTED] schrieb im Newsbeitrag news:[EMAIL PROTECTED] Claudio Grondi wrote: I am on a Widows 2000 box using the NTFS file system. Both up to now suggested approaches as - tee.exe (where I used the http://david.tribble.com/dos/tee.exe DOS-port with redirecting stdout to NULL) and - parallel copy (hoping caching does the job) are by far slower than the consecutive copy: single copy speed 12-15 MByte/s which gives effectively 6-7 MByte/s, tee.exe or twice copy in parallel 1-3 MByte/s. Any other suggestions except writing an own optimised version of tee.exe Try this: http://mastermind.com.pl/multicopy/ This is small tool I've wrote, that does use large memory buffers with asynchronous I/O to copy file. Following command: multicopy c:\testfile d:\testfile e:\testfile f:\testfile will copy c:\testfile to d, e and f disks. With four separate IDE disks I can copy file at about 30MB/s, which means 120MB/s total I/O. You can give it a try, but I don't know if it will work fast with USB drives. HTH, sc0rp. -- http://mail.python.org/mailman/listinfo/python-list
Re: Python becoming less Lisp-like
Op 2005-03-18, Bengt Richter schreef [EMAIL PROTECTED]:
[ ... ]
BTW, I would like a re-assign or find-and-rebind operation spelled := which
would
make x := 123 mean look for x as if to read its value in a right hand side
expression,
(except do not look into __builtins__) and wherever found, rebind to 123 --
and if not found,
raise an exception.
I think var := 'something' would be a useful substitute for the idiom of
var[0] = 'something' and be unambiguous.
:= as an operator could combine like op= if desired, so we could write
var +:= some.long.expression[that].you('do')**not.want.to.type.twice
instead of
_ = some.long.expression[that].you('do')**not.want.to.type.twice
var +:= _ # meaning var := var + _
or such.
Well you have my support for this. But I have the impression this
differs from the previous time you came up with a similar idea.
If IRC your previous proposal limited the search to the local
scope, making a := b equivallent to something like a; a = b.
I must say I like your current idea better.
--
Antoon Pardon
--
http://mail.python.org/mailman/listinfo/python-list
Re: missing? dictionary methods
Antoon Pardon [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Well at least I find them missing. For the moment I frequently come across the following cases. 1) Two files, each with key-value pairs for the same dictionary. However it is an error if the second file contains a key that was not in the first file. In treating the second file I miss a 'set' method. dct.set(key, value) would be equivallent to dct[key] = value, except that it would raise a KeyError if the key wasn't already in the dictionary. 2) One file with key-value pairs. However it is an error if a key is duplicated in the file. In treating such files I miss a 'make' method. dct.make(key, value) would be equivallent to dct[key] = value. except that it would raise a KeyError if the key was already in the dictionary. What do other people think about this? -- Antoon Pardon +1 I'm sure I've needed and implemented this functionality in the past, but it was simple enough to even think of extracting them into functions/methods. In contrast to the recent pre-PEP about dict accumulating methods, set() and make() (or whatever they might be called) are meaningful for all dicts, so they're good candidates for being added to the base dict class. As for naming, I would suggest reset() instead of set(), to emphasize that the key must be there. make() is ok; other candidates could be add() or put(). George -- http://mail.python.org/mailman/listinfo/python-list
Please help for Python programming
I don't know why i entered the below code and it will miss some
records.
Anyone can help me???
users = {}
users1 = {}
while 1:
user, serviceType, msgType, inOut, date, time, numBytes =
aLog.GetNextMessage()
fullmsg = serviceType + | + msgType + | + inOut
bytemsg = user + + serviceType + + msgType + + inOut +
+ numBytes
user1 = user
msgDict = {}
byteDict = {}
print bytemsg # 53 records in source file
msgDict = users[user] # get the cum statistics for this user
byteDict = users1[user1]
print bytemsg # 50 records in source file
--
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Re: how can I put a 1Gb file in a zipfile??
On Sun, 20 Mar 2005 14:17:20 -0600, Jeff Epler [EMAIL PROTECTED] wrote:
--liOOAslEiF7prFVr
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable
The limits of ZIP files according to the folks who make info-zip:
http://www.info-zip.org/pub/infozip/FAQ.html#limits
statistic limit
number of files65,536
uncompressed size of a single file 4 GB
compressed size of a single file 4 GB
total size of archive 256 TB
maximum path/filename length64 KB=20
I had no trouble creating a zip file from a 4GB file filled with '\0'
bytes:
$ python bennie.py
$ ls -ls test.zip big
12 -rw-rw-r-- 1 jepler jepler 4294967296 Mar 20 14:11 big
4084 -rw-rw-r-- 1 jepler jepler4174545 Mar 20 14:14 test.zip
I'm using Python 2.3.3 on Fedora Core 2.
#
# bennie.py
def make_4gb_file(f):
f =3D open(f, w)
f.seek ( 4 * 1024 * 1024 * 1024 - 1)
f.write(\0)
f.close()
Not quite OT[?]:
This makes me think there ought to be a way of making at least python's builtin
open see virtual file system objects,
analogous to StringIO creating file objects.
If we had a mountvfs('/some/unix/and/or/maybe/win/style/path/vfs',
vfsclass(some, args, if_desired))
which would result in that
open(/some/unix/and/or/maybe/win/style/path/vfs/morepath/filename.ext', mode)
(where vfsclass(some, args, if_desired) = vsfclass_intance) would call
vfsclass_instance.open('morepath.filename.ext', mode) which could then return
an object that could support
file operations like returning 4gb of virtually read-by-read-method data, or
otherwise acting like an open file
object of a real file system that python programs and library function using
open and file would find
if given the mounted path. Subdirectories could be fixed for starters, but
virtualizing subdirectory creation
etc would be possible if you intercepted the right interface calls and
implemented it in the vfs.
This would let you define a virtual file in place of the real file above, and
also would allow a lot of transparent
testing of file-using software that takes paths and file names, not open file
objects.
Of course you can't affect what the underlying os sees without getting into its
file system machinery, but
being able to mount virtual file systems into what os.open sees would cover a
lot of ground ISTM. One
could argue pro and con about supporting virtual mounts into both unix and
windows-style paths.
import zipfile
z =3D zipfile.ZipFile(/tmp/test.zip, w, zipfile.ZIP_DEFLATED)
make_4gb_file(/tmp/big)
z.write(/tmp/big)
z.close()
#
Regards,
Bengt Richter
--
http://mail.python.org/mailman/listinfo/python-list
Re: generating audio signals
On Sun, 20 Mar 2005 12:25:22 +0200, nicke [EMAIL PROTECTED] wrote: I'm running linux and would like to generate specific frequencies and play them(in OSS) or alternatively save them as wav files, how should I accomplish this? Using python to play and generate is not strictly necessary, as long as I can invoke the command from python. I know for example xmms can do this, but I want a command-line only solution. Perhaps http://docs.python.org/lib/module-wave.html will help. I used it to create an echo effect toy for my grandson by reading existing .wav sound effect files and adding delayed reduced-aplitude feeback to itself and writing another file. Parameters were distance in feet to a reflecting wall (assuming 1000 ft/sec sound speed ;-) and relection volume factor. Not hard. Maybe make yourself a little utility first that will show you the specs for any .wav file (i.e., sampling frequency, bytes per sample, channels, etc.) I don't recall at the moment whether you have to deal with signed or offset amplitude values, but it won't be hard. This won't play the sounds though. Regards, Bengt Richter -- http://mail.python.org/mailman/listinfo/python-list
Re: HTML editor component?
skol wrote: Is there any HTML WYSIWYG editor component available for Python/wxPython? Thanks. I can reccomend Kupu as a javascript one. http://kupu.oscom.org A WYSIWYG HTML editor is a full blown application - so I'd be surprised (pleasantly) to see one available as a component. Regards, Fuzzyman http://www.voidspace.org.uk/python/index.shtml -- http://mail.python.org/mailman/listinfo/python-list
(,) Do You Want To Know For Sure You Are Going To Heaven?
http://www.want-to-be-sure.blogspot.com Click On Link -- http://mail.python.org/mailman/listinfo/python-list
Re: IconvCodec, UTF-32 P4 ?
Do Re Mi chel La Si Do wrote: Hi ! Iconvcodec was good, for to work with UTF-32, with Python 2.3 But, which tool, for the same use, with Python 2.4 ? Thanks for suggestions. Do you mean it's impossible to build iconvcodec anymore? Serge. -- http://mail.python.org/mailman/listinfo/python-list
Re: Please help for Python programming
[EMAIL PROTECTED] wrote: I don't know why i entered the below code and it will miss some records. Anyone can help me??? Sorry, my mindreading brain extension is at the service right now, so I can't guess what that piece of syntactically incorrect code is supposed to do and what error message it produces. Until you come up with a more detailed error description, I'll have a good read at http://www.catb.org/~esr/faqs/smart-questions.html Which I suggest you read too. -- Regards, Diez B. Roggisch -- http://mail.python.org/mailman/listinfo/python-list
Re: beeping portably
On 20 Mar 2005 09:03:25 -0800, Jim [EMAIL PROTECTED] wrote: Hello, I'd like to emit beeps. The twists are that (1) I hope to have control over the frequency of the beeps and their duration and (2) I'd like the solution to be portable across Linux, Windows, and OS X. I've done some searching of this group and the solutions that people have offered in the past seem not to satisfy both points. For instance, that I can tell, \a or curses.beep() doesn't give you control over the frequency or duration. I also looked at wxWindows but there were warnings about the MMedia module (status is unclear) that made me leery. for windows, I think it's http://docs.python.org/lib/module-winsound.html but I don't know if there's a corresponding *nix module. Or maybe you can make one just writing to some /dev/somethingorother, and conditionally set up the appropriate thing for limited platform-appropriateness if not independence. Regards, Bengt Richter -- http://mail.python.org/mailman/listinfo/python-list
Re: beeping portably
Jim wrote: Hello, I'd like to emit beeps. The twists are that (1) I hope to have control over the frequency of the beeps and their duration and (2) I'd like the solution to be portable across Linux, Windows, and OS X. I've done some searching of this group and the solutions that people have offered in the past seem not to satisfy both points. For instance, that I can tell, \a or curses.beep() doesn't give you control over the frequency or duration. I also looked at wxWindows but there were warnings about the MMedia module (status is unclear) that made me leery. Maybe pygame helps? You can play sound with it, and the sdl abstracts from directx and whatever linux uses. -- Regards, Diez B. Roggisch -- http://mail.python.org/mailman/listinfo/python-list
Re: Pre-PEP: Dictionary accumulator methods
Raymond, I am +1 for both suggestions, tally and appendlist. Extended: Also, in all of my code base, I've not run across a single opportunity to use something like unionset(). This is surprising because I'm the set() author and frequently use set based algorithms.Your example was a good one and I can also image a graph represented as a dictionary of sets. Still, I don't mind writing out the plain Python for this one if it only comes up once in a blue moon. I am more than sure you are right about this. But, please keep in mind that you and we all have come very, very accustomed to using lists for everything and the kitchen sink in Python. Lists where there from the beginning of Python, and even before the birth of Python; very powerfull, well implemented and theoretically well founded datastructures - I heared there is a whole language based on list processing. *pun intended* sets on the other hand --- I know, in mathematics they have a deep, long history. But in programming? Yeah, in SQL and ABAP/4 basically you are doing set operations on every join. But its rather uncommon to call it set. With 2.3 Python grew a set module. And, in ONLY ONE revision it got promoted to a buildin type - a honour only those who read c.l.p.d. regualary can value correctly. And sets are SO NATURALLY for a lot of problems ... I never thought of replacing my list in dict constructs with sets before, BUT there are 90% of problem domains where order is not important, AND fast membership testing is a unique sales point. So please for best impressions: let us have a look at our code, where we use the dict.setdefault(key,[]).append() idiom, where it could be replaced to a better effectivity with dict.setdefault(key,set()).add() If it is less than 60%, forget it. If it is more Harald -- http://mail.python.org/mailman/listinfo/python-list
Re: IconvCodec, UTF-32 P4 ?
re-Hi When I look http://cjkpython.i18n.org I found only binaries for P2.1, P2.2 P2.3 (I am on windows) If I run the P2.3's version, on my Python 2.4 config, the package said that he don't found Python2.3. And, I don't have compiler for work with source. If benefactor of humanity has do a binary for windows/Python 2.4, they would be fabulous. Thanks Michel Claveau -- http://mail.python.org/mailman/listinfo/python-list
Re: missing? dictionary methods
Antoon Pardon wrote:
Well at least I find them missing.
For the moment I frequently come across the following cases.
1) Two files, each with key-value pairs for the same dictionary.
However it is an error if the second file contains a key that
was not in the first file.
In treating the second file I miss a 'set' method.
dct.set(key, value) would be equivallent to dct[key] = value,
except that it would raise a KeyError if the key wasn't
already in the dictionary.
2) One file with key-value pairs. However it is an error
if a key is duplicated in the file.
In treating such files I miss a 'make' method.
dct.make(key, value) would be equivallent to dct[key] = value.
except that it would raise a KeyError if the key was
already in the dictionary.
What do other people think about this?
def safeset(dct, key, value):
if key not in dct:
raise KeyError(key)
else:
dct[key] = value
def make(dct, key, value):
if key in dct:
raise KeyError('%r already in dict' % key)
else:
dct[key] = value
I don't see a good reason to make these built in to dict type.
--
Robert Kern
[EMAIL PROTECTED]
In the fields of hell where the grass grows high
Are the graves of dreams allowed to die.
-- Richard Harter
--
http://mail.python.org/mailman/listinfo/python-list
Re: How to create an object instance from a string??
Hi ! Finally, it's the best solution. Michel Claveau -- http://mail.python.org/mailman/listinfo/python-list
Re: Python scope is too complicated
Dan Bishop wrote: x = 17 sum(x for x in xrange(101)) 5050 x 17 Your example with generator expressions is interesting. Even more interesting is: def foo(x): y= (i for i in x) return y From the disassembly it seems that the generator is a code object but 'x' is not a cell variable. WTF? How do I disassemble the generator? Must look into this [ list comprehensions are different because they expand to inlined bytecode ] jf -- http://mail.python.org/mailman/listinfo/python-list
UTF Questions
I have a couple of questions about the UTF encodings. The codecs module has constants definded for the UTF32 encoding, yet this encoding isn't supported as a standard encoding. Why isn't it supported ? It possibly has something to do with my next question. I know that unicode has (recently?) been expanded to include new character sets. This means that the latest unicode standard can't be fully supported with 2 bytes per character. As far as I know though, Python doesn't (yet) support the extended version of unicode anyway ? Am I correct ? Best Reagrds, Fuzzyman http://www.voidspace.org.uk/python/index.shtml -- http://mail.python.org/mailman/listinfo/python-list
Re: Question about string.printable and non-printable characters
Michael Hoffman schrieb: string.printable is a least-common denominator ASCII set. You can certainly make it string.printable + aeioun (replacing the ASCII letters with their accented versions in your codeset of course). There is something I don't understand about string.printable: on the one hand the library reference says This is a combination of digits, letters, punctuation, and whitespace. The value of string.letters is locale-dependent, so string.printable should change as well after calling locale.setlocale(). But it doesn't. But you could always call locale.setlocale() and afterwards combine your printable string yourself. -- Dr. Sibylle Koczian Universitaetsbibliothek, Abt. Naturwiss. D-86135 Augsburg Tel.: (0821) 598-2400, Fax : (0821) 598-2410 e-mail : [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
Re: missing? dictionary methods
Op 2005-03-21, Robert Kern schreef [EMAIL PROTECTED]:
Antoon Pardon wrote:
Well at least I find them missing.
For the moment I frequently come across the following cases.
1) Two files, each with key-value pairs for the same dictionary.
However it is an error if the second file contains a key that
was not in the first file.
In treating the second file I miss a 'set' method.
dct.set(key, value) would be equivallent to dct[key] = value,
except that it would raise a KeyError if the key wasn't
already in the dictionary.
2) One file with key-value pairs. However it is an error
if a key is duplicated in the file.
In treating such files I miss a 'make' method.
dct.make(key, value) would be equivallent to dct[key] = value.
except that it would raise a KeyError if the key was
already in the dictionary.
What do other people think about this?
def safeset(dct, key, value):
if key not in dct:
raise KeyError(key)
else:
dct[key] = value
def make(dct, key, value):
if key in dct:
raise KeyError('%r already in dict' % key)
else:
dct[key] = value
I don't see a good reason to make these built in to dict type.
I would say the same reason that we have get. There is no
reason to have a builtin get it is easily implemented
like this:
def get(dct, key, default):
try:
return dct[key]
except KeyError:
return default
I would go even so far that there is more reason to have a built-in
safeset and make, than there is a reason to have a built-in get.
The reason is that a python implementation of safeset and make,
will mean two accesses in the dictionary, once for the test and
once for the assignment. This double access could be eliminated
with a built-in. The get on the other hand does only one dictionary
access, so having it implemeted in python is a lesser burden.
--
Antoon Pardon
--
http://mail.python.org/mailman/listinfo/python-list
Re: Text-to-speech
Maybe you can bind Festival (http://www.cstr.ed.ac.uk/projects/festival/download.html) with SWIG. Presumably somebody could; at this point it's well beyond me. But thank you for the suggestion. Charles Hartman http://cherry.conncoll.edu/cohar -- http://mail.python.org/mailman/listinfo/python-list
Re: Text-to-speech
Charles Hartman wrote: Maybe you can bind Festival (http://www.cstr.ed.ac.uk/projects/festival/download.html) with SWIG. Presumably somebody could; at this point it's well beyond me. But thank you for the suggestion. Charles Hartman http://cherry.conncoll.edu/cohar There is tkfestival http://ludios.org/programs/tkfestival that uses expect to control festival, I assume it has a very easy to use CLI and would be simple to make use of pexpect to control festival from python in the same way. Martin -- http://mail.python.org/mailman/listinfo/python-list
Constructor class problem
Hi,
I am a newbie and have to modify some python moduls.
I get the followin error:
TypeError: __init__() takes exactly 3 arguments (2 given)
Here the code snippet:
class gXconv:
def __init__(self, pathValue):
self.pathValue=pathValue
self.__sections = {}
self.__spalten = {}
self.labelfiles=[]
etc.
call:
try:
gx=gXconv.gXconv(gXconfPath)
except gXconv.gXconvertError, msg:
print msg
sys.exit(1)
Hoping for hints.
Wolfgang
--
http://mail.python.org/mailman/listinfo/python-list
Re: Lowest hassle Python web server?
snip - Does threading cause any more of a hassle in Python than Java? snip Hello, From the python docs, it states that the threading design is loosely based upon the java module. Certainly, coming from Java I had little trouble getting used to python threading. However heres some gotchyas : - The thing to beware of there is something in Python called the GIL. Read up about that before you start threading stuff - this will explain to you why there is no volatile keyword - this got me confused at first. - There is no synchronize keyword, instead you have to use locks which can be obtained from the threading module - There are no methods such as wait on an object (there is an event object you can get to call wait upon - again threading) - The handy concurrent stuff which has been introduced in J2SE5.0 mainly isn't in python - through you do get Queues in Python (maybe more, I dunno?) The GIL thing makes it easier to do threading with Python (there are disadvantages to the GIL but I won't get into that here - if you're interested read through the history on this group) but it's still threading so beware! Cheers, Neil -- Neil Benn Senior Automation Engineer Cenix BioScience BioInnovations Zentrum Tatzberg 46 D-01307 Dresden Germany Tel : +49 (0)351 4173 154 e-mail : [EMAIL PROTECTED] Cenix Website : http://www.cenix-bioscience.com -- http://mail.python.org/mailman/listinfo/python-list
xmlrpc with Python and large datases
Hi all, I helped one of my co-workers put together an XMLRPC Python script that allowed him to get database data from remote machines. This was done because the source of the data could be Oracle on a Sun/Solaris machine, and MySQL on our linux machines. Doing the script in Python allowed him to gather the date with a general purpose API and just send over some SQL queries. Since then he's run into a problem. If he sends a query that gets a very large recordset from the database the script fails and it vaguely reports about a broken pipe, which I'm guessing is a problem with the network connection. Has anyone else seen this use XMLRPC and Python and large amounts of data being returned via XMLRPC? And if so, is there a solution? Thanks, Doug -- http://mail.python.org/mailman/listinfo/python-list
Re: getting text from WinXP console
Lucas Raab wrote: Chris Maloof wrote: Hello, Does anyone know how I can read the ASCII text from a console window (from another application) in WinXP? It doesn't sound like a major operation, but although I can find the window via pywin32, I haven't been able to do anything with it. I'd really just like to get the window text into a string. By console window, I mean the sort of thing that comes up when you run command (although this particular one is for the game NetHack). Thanks, Chris If you're looking to do this from Python then do python appname.py output.txt only without the quotes. AFAIK, this only works on Windows. Correct me if it works from Linux or another OS. It works on Unix. :) -- http://mail.python.org/mailman/listinfo/python-list
Re: Constructor class problem
Wolfgang wrote:
Hi,
I am a newbie and have to modify some python moduls.
I get the followin error:
TypeError: __init__() takes exactly 3 arguments (2 given)
Here the code snippet:
class gXconv:
def __init__(self, pathValue):
self.pathValue=pathValue
self.__sections = {}
self.__spalten = {}
self.labelfiles=[]
etc.
call:
try:
gx=gXconv.gXconv(gXconfPath)
except gXconv.gXconvertError, msg:
print msg
sys.exit(1)
That error can't appear in the above code - is the line in the stacktrace
amongst the shown ones? I doubt it.
The error means that you tried to call a function with less arguments than
it expected. As in __init__ the first argument is implicit on creation of
an object, the above errormessage indicates that there is an __init__
of the form
class Foo:
def __init__(self, arg1, arg2)
pass
called like this
Foo(bar)
But as the only constructor you show _has_ only one additional argument
besides self and line
gx=gXconv.gXconv(gXconfPath)
shows that you called it properly, the error must come from somewhere else.
--
Regards,
Diez B. Roggisch
--
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Re: xmlrpc with Python and large datases
writeson wrote: Since then he's run into a problem. If he sends a query that gets a very large recordset from the database the script fails and it vaguely reports about a broken pipe, which I'm guessing is a problem with the network connection. Has anyone else seen this use XMLRPC and Python and large amounts of data being returned via XMLRPC? And if so, is there a solution? Most web servers have a configurable limit on the size of data sent to the server for a single request. It sounds as though you may be exceeding this. Check what setting has been used on your web server. If it is Apache then look at the limitrequestbody parameter, it is unlimited by default, but advisable to set a limit to deter certain types of DoS attack. -- http://mail.python.org/mailman/listinfo/python-list
Re: getting text from WinXP console
Chris Maloof wrote: Hello, Does anyone know how I can read the ASCII text from a console window (from another application) in WinXP? It doesn't sound like a major operation, but although I can find the window via pywin32, I haven't been able to do anything with it. I'd really just like to get the window text into a string. By console window, I mean the sort of thing that comes up when you run command (although this particular one is for the game NetHack). Thanks, Chris If you're looking to do this from Python then do python appname.py output.txt only without the quotes. AFAIK, this only works on Windows. Correct me if it works from Linux or another OS. -- -- Lucas Raab lvraab located at earthlink.net dotpyFE located at gmail.com AIM:Phoenix11890 MSN:[EMAIL PROTECTED] IRC:lvraab ICQ:324767918 Yahoo: Phoenix11890 -- http://mail.python.org/mailman/listinfo/python-list
Re: missing? dictionary methods
Antoon Pardon wrote: I would say the same reason that we have get. There is no reason to have a builtin get it is easily implemented like this: def get(dct, key, default): try: return dct[key] except KeyError: return default I would go even so far that there is more reason to have a built-in safeset and make, than there is a reason to have a built-in get. The reason is that a python implementation of safeset and make, will mean two accesses in the dictionary, once for the test and once for the assignment. This double access could be eliminated with a built-in. The get on the other hand does only one dictionary access, so having it implemeted in python is a lesser burden. That's not true; they're on more or less the same level computation-wise. try:...except... doesn't relieve the burden; it's expensive. For me, the issue boils down to how often such constructs are used. I don't think that I've ever run into use cases for safeset() and make(). dct.get(key, default) comes up *a lot*, and in places where speed can matter. Searching through the standard library can give you an idea how often. -- Robert Kern [EMAIL PROTECTED] In the fields of hell where the grass grows high Are the graves of dreams allowed to die. -- Richard Harter -- http://mail.python.org/mailman/listinfo/python-list
Re: FAQ 1.7.3 : How can I have modules that mutually import each other
Needs??? Sorry to be blunt, but this is an intrinsically ludicrous concept, in *any* language. The whole idea of modules is (wait for it) modularity. A imports B which imports A is an utter nonsense. There is such a thing called 'recursion'. Self-recursion is when function x calls itself to execute the same action on a partial result of its previous invocation. This technique is a natural expression of what such ugly constructs as for and while are for in some programming languages. Indirect recusion is when function x calls y, and function y calls x. It is often happens in state automata. A static equivalent of indirect recursion is dependencies between declarations, when declaration x depends on y, and declaration y depends on x. Imagine a design of a literate programming environment, where both documentation and text are structured, and either can contain the other. A natural design for that is to have two modules, one implementing the parser for documentation, the other implementing the parser for code, each referencing the other so that both parsers can call each other when they need to switch context. In a well-designed programming language, circular intermodule dependencies are normal, because this is a natural high-level abstraction to express such relations. Because of primitive implementation of modular system in Python, circular dependencies are not possible, and things which are normally done automatically in a higher-level language, need to be coded manually in Python. In particular, to bypass this deficiency of Python for a problem similar to one described above, one has to define base classes for each of the two parsers, and make the implementations depend on the other implementation's base class, not on itself, thus splitting the interface and the implementation where it is not only unnecessary but outright wrong if clean design is taken into consideration. I'd wish a cleaner and more consistent implementation of packages existed in Python; but unfortunately too many things in current Python are far from being on the level a modern programming language (such as Common Lisp, for example) demands. David Tolpin http://davidashen.net/ -- http://mail.python.org/mailman/listinfo/python-list
Problem installing Python in Win98se
Hi, I want to install Python on my Windows 98se system, but although I followed the instructions carefully, it won't run. Here's a copy of the Web instructions I followed, from Python.org: Starting with the Python 2.4 releases the Windows Python installer is being distributed as a Microsoft Installer (.msi) file. To use this, the Windows system must support Microsoft Installer 2.0. Just save the installer file python-2.4.msi to your local machine, then double-click python-2.4.msi to find out if your machine supports MSI. If it doesn't, you'll need to install Microsoft Installer first. Many other packages (such as Word and Office) also include MSI, so you may already have it on your system. If not, you can download it freely from Microsoft for Windows 95, 98 and Me The installer I downloaded from Microsoft and ran is called InstMsiA.exe. That seemed to install fine, but the .msi file still won't run. Any ideas what I'm doing wrong? Thanks in advance, Andy winmail.dat-- http://mail.python.org/mailman/listinfo/python-list
webGobbler update
The beta 10 of webGobbler is available for download. http://sebsauvage.net/python/webgobbler/ Amongst the changes, the Windows screensaver now works, although it still misses a configuration GUI. I also created a non-technical page for webGobbler, the gallery: http://sebsauvage.net/webgobbler/ I will continue to fuel this gallery with new pictures on occasions. Enjoy. :-) -- Sébastien SAUVAGE ''.join([chr(ord(c)+4) for c in 'oa^o]qr]caoa^o]qr]ca*jap']) -- http://mail.python.org/mailman/listinfo/python-list
Re: missing? dictionary methods
Op 2005-03-21, Robert Kern schreef [EMAIL PROTECTED]: Antoon Pardon wrote: I would say the same reason that we have get. There is no reason to have a builtin get it is easily implemented like this: def get(dct, key, default): try: return dct[key] except KeyError: return default I would go even so far that there is more reason to have a built-in safeset and make, than there is a reason to have a built-in get. The reason is that a python implementation of safeset and make, will mean two accesses in the dictionary, once for the test and once for the assignment. This double access could be eliminated with a built-in. The get on the other hand does only one dictionary access, so having it implemeted in python is a lesser burden. That's not true; they're on more or less the same level computation-wise. try:...except... doesn't relieve the burden; it's expensive. I have always heard that try: ... except is relatively inexpensive in python. Particularly if there is no exception raised. For me, the issue boils down to how often such constructs are used. I don't think that I've ever run into use cases for safeset() and make(). dct.get(key, default) comes up *a lot*, and in places where speed can matter. Searching through the standard library can give you an idea how often. It is always hard to compare the popularity/usefullness of two things when one is already implemented and the other is not. IME it is not that uncommon to know in some part of the code that the keys you use should already be in the dictionary or contrary that you know the key should not already be in the dictionary. -- Antoon Pardon -- http://mail.python.org/mailman/listinfo/python-list
Re: For loop extended syntax
On Sun, 20 Mar 2005 13:16:37 -0500, George Sakkis [EMAIL PROTECTED] wrote: I'm sure there must have been a past thread about this topic but I don't know how to find it: How about extending the for X in syntax so that X can include default arguments ? This would be very useful for list/generator comprehensions, for example being able to write something like: [x*y-z for (x,y,z=0) in (1,2,3), (4,5), (6,7,8)] instead of the less elegant explicit loop version that has to check for the length of each sequence. What do you think ? George How would this examples work? for x=5,y,z in (123),(4,5),(6,7,8,9) Would the x default over ride the first value? Should, the 4 element in the third tuple be dropped without an error? A general reusable function might be something like this: def formatlistofargs(arglist, nargs=1, defvalue=0): returnvalues = [] for i in arglist: ii = list(i) while len(ii)nargs: ii.append(defvalue) ii=ii[:nargs] returnvalues.append(ii) return returnvalues for x,y,z in formatlistofargs(((1,2,3),(3,4),(5,6,7,8)),3): print x,y,z Ron -- http://mail.python.org/mailman/listinfo/python-list
Re: how can I put a 1Gb file in a zipfile??
From what I understand, Winzip uses their own proprietary version of a Zip format. That means that you will only be able open those archives with Winzip. (IOW, you are locked in) I think someone mentioned having developed a Python module for the 7zip fomat, but I may be wrong. In any case, you could simply write a wrapper over the command line version of 7zip and your problem would be solved. There is a Linux version as well. (http://p7zip.sourceforge.net/) bennie wrote: Christos TZOTZIOY Georgiou wrote: AFAIR there is a 4GiB (or 2GiB) size limit applying both to files added to zip and to the total size of the zip file. This limit comes from the zip file specification (32 bit offsets). Can it be that you are creating a zip file that its total size exceeds the limit? That is possible. But with Winzip program it can. How come that is with ZipFile not works -- http://mail.python.org/mailman/listinfo/python-list
Re: PyPI errors?
On Mon, 21 Mar 2005 04:24:16 + (UTC), Daniel Yoo [EMAIL PROTECTED] wrote: Does anyone know why PyPI's doesn't like my PKG-INFO file? Here's what I have: The PyPI code is being modified at the PyCon sprints; clearly this is a bug that was introduced yesterday. I expect it'll get fixed today. --amk -- http://mail.python.org/mailman/listinfo/python-list
Re: Getting directory size
francisl wrote:
How can we get a full directory size (sum of all his data)?
like when we type `du -sh mydir`
Because os.path.getsize('mydir') only give the size of the directory
physical representation on the disk.
os.popen('du -sh mydir') would be one approach.
The harder way is to use os.walk('mydir') to scan all
files in all subdirectories, and use os.stat() or
os.path.getsize() to add up the sizes of each file.
-Peter
--
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Re: missing? dictionary methods
On 21 Mar 2005 08:21:40 GMT, Antoon Pardon [EMAIL PROTECTED]
wrote:
Well at least I find them missing.
For the moment I frequently come across the following cases.
1) Two files, each with key-value pairs for the same dictionary.
However it is an error if the second file contains a key that
was not in the first file.
In treating the second file I miss a 'set' method.
dct.set(key, value) would be equivallent to dct[key] = value,
except that it would raise a KeyError if the key wasn't
already in the dictionary.
2) One file with key-value pairs. However it is an error
if a key is duplicated in the file.
In treating such files I miss a 'make' method.
dct.make(key, value) would be equivallent to dct[key] = value.
except that it would raise a KeyError if the key was
already in the dictionary.
What do other people think about this?
There is a has_key(k) method that helps with these.
Adding these wouldn't be that hard and it can apply to all
dictionaries with any data.
class newdict(dict):
def new_key( self, key, value):
if self.has_key(key):
raise KeyError, 'key already exists'
else:
self[key]=value
def set_key( self, key, value):
if self.has_key(key):
self[key]=value
else:
raise KeyError, 'key does not exist'
d = newdict()
for x in list('abc'):
d[x]=x
print d
d.new_key('z', 'z')
d.set_key('a', 'b')
print d
Which is faster? (has_key()) or (key in keys())?
--
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Re: Pre-PEP: Dictionary accumulator methods
Raymond Hettinger wrote: I would like to get everyone's thoughts on two new dictionary methods: def count(self, value, qty=1): try: self[key] += qty except KeyError: self[key] = qty def appendlist(self, key, *values): try: self[key].extend(values) except KeyError: self[key] = list(values) -0.9 Not impressed, they feel too specific for being builtin dictionary methods and give the impression of just trying to save a few lines here and there. I don't feel the names convey the functionality of the methods either. I know there's the speed argument but I'd rather not have these on the dict at all. +0.1 I sort of feel a slight need for this. But where would you stop? What if people decrement lots? what if next there's a need for division? How would you determine how you add the item to the key if it already exists? In a general way: mydict.set(key, value=None, default=None, how=operator.setitem) This feels slightly better as it's not tied down to what sort of item you're setting. But: for word in words: mydict.set(word, 1, 0, operator.add) I dunno, feels a bit verbose maybe. The setdefault() method would continue to exist but would likely not make it into Py3.0. I agree that setdefault is wart though. And for dict.default = value: (Quoth RON): With a preset default mode, it then becomes possible to inadvertently create default values that will cause problems without knowing it. So then we have to remember to change the setdefault value to None or null to avoid problems. Ouch! Agreed, -1 there then. PROBLEMS BEING SOLVED - The readability issues with the existing constructs are: * They are awkward to teach, create, read, and review. * Their wording tends to hide the real meaning (accumulation). * The meaning of setdefault() 's method name is not self-evident. I feel this only really applies for setdefault (which I wouldn't be sorry to see the back of). And your examples: d[key] = d.get(key, 0) + qty d.setdefault(key, []).extend(values) Would better be written in a long-handed fashion anyway as per the implementations were suggested: try: d[key] += qty except KeyError: d[key] = 0 Yeah, yeah, I know, speed. But not like this. Sorry. -- http://mail.python.org/mailman/listinfo/python-list
Re: UTF Questions
Fuzzyman wrote: I have a couple of questions about the UTF encodings. The codecs module has constants definded for the UTF32 encoding, yet this encoding isn't supported as a standard encoding. Why isn't it supported ? Probably because there is little demand for it. The most widespread unicode encodings are utf-8 and utf-16 It possibly has something to do with my next question. I know that unicode has (recently?) been expanded to include new character sets. This means that the latest unicode standard can't be fully supported with 2 bytes per character. As far as I know though, Python doesn't (yet) support the extended version of unicode anyway ? Am I correct ? Python does support them. PEP 261 has the answers for your questions. Serge. -- http://mail.python.org/mailman/listinfo/python-list
Re: IconvCodec, UTF-32 P4 ?
Hi ! Thanks My e-mail : [EMAIL PROTECTED] @-salutations -- Michel Claveau -- http://mail.python.org/mailman/listinfo/python-list
Save passwords in scripts
Hello, I've a scripts that allows limited manipulation of a database to users. This script of course needs to save a password for the database connection. The users, on the other hand need read permission on the script in order to execute it but should not be able to read out the password. What is the common way to solve this problem? My current way is to allow the users to execute the script with sudo while not having read permission when acting as a ordinary user. But I don't like this solutions and consider it very ugly. Thanks, Florian -- http://mail.python.org/mailman/listinfo/python-list
Re: Pre-PEP: Dictionary accumulator methods
FWIW, here is my take on the defaultdict approach: def defaultdict(defaultfactory, dictclass=dict): class defdict(dictclass): def __getitem__(self, key): try: return super(defdict, self).__getitem__(key) except KeyError: return self.setdefault(key, defaultfactory()) return defdict d = defaultdict(int)() d[x] += 1 d[x] += 1 d[y] += 1 print d d = defaultdict(list)() d[x].append(1) d[x].append(2) d[y].append(1) print d Michele Simionato -- http://mail.python.org/mailman/listinfo/python-list
Re: spaces in re.compile()
d = re.compile(' \d{3}\.\d{3}\.\d{3} ')
d.findall(' 123.345.678 ')
[' 123.345.678 ']
Works for me.
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Re: spaces in re.compile()
AndrewN wrote:
d = re.compile(' \d{3}\.\d{3}\.\d{3} ')
d.findall(' 123.345.678 ')
[' 123.345.678 ']
Works for me.
Yes, you're correct. That works if there is a space at the front and
back. However, place '123.345.678' in a file by itself and it doesn't work.
What I'm trying to avoid is something like this '1234.345.6789' Notice
the 4 chars in the first and last part? findall gets '234.345.678' and
returns positive... I thought that by requiring spaces I could avoid
matches such as this, but I was wrong. How can I get what I'm looking
for w/o getting the other stuff as well?
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(,) Do You Want To Know For Sure You Are Going To Heaven?
http://www.want-to-be-sure.blogspot.com Click On Link -- http://mail.python.org/mailman/listinfo/python-list
Re: Please help for Python programming
[EMAIL PROTECTED] wrote:
I don't know why i entered the below code
And we don't know either !-)
and it will miss some
records.
Anyone can help me???
If you hope to get some useful help, it would be a good idea to follow
Diez's advice (see other post in this thread)
users = {}
users1 = {}
while 1:
Unless there is a break somewhere in the following code (I can't find
one...), this is an endless loop. But you know this, don't you ?
user, serviceType, msgType, inOut, date, time, numBytes =
aLog.GetNextMessage()
fullmsg = serviceType + | + msgType + | + inOut
tip : use string formating instead (string concatenations are to be
avoided in Python), ie:
fullmsg = %s | %s | %s % (serviceType, msgType, inOut)
bytemsg = user + + serviceType + + msgType + + inOut +
+ numBytes
idem
user1 = user
msgDict = {}
byteDict = {}
This re-initialises both dicts on each iteration. Is this really what
you want ?
print bytemsg # 53 records in source file
Here you have an obvious indentation problem. This code *cannot* run.
Take care of not mixing tabs and spaces (tip: configure you editor to
only use spaces)
msgDict = users[user] # get the cum statistics for this user
Given the above binding of 'users' as an empty dict, this should raise a
KeyError. It's also overwriting the previous binding of msgDict.
byteDict = users1[user1]
idem. Also, you don't need to bind 2 different names to the same value
to use this value as key in 2 different dicts. Here you could as well
use user for both dicts, since user and user1 are bound to the same value.
print bytemsg # 50 records in source file
In addition to Diez's reading advice, here are some that are more
specific to code-related questions:
1/ paste code, dont re-type it
... this avoid stupid typos
2/ post running code
... if the code is so obviously broked that it cannot even compile|run,
readers will have to fix it first - which they'll probably won't do.
Even if they do, they may not fix it the right way. Everyone's losing
its time...
3/ post the smallest possible bit of code that exhibit your problem
... no one's going to [read 3000 lines of code | install 30 gigabytes of
third part libs | etc...] just to help you. Moreover, quite often, one
finds the bug while reducing the problematic code to it's smallest possible.
And one last: don't forget to put your bullet-proof jacket on before
reading the answers !-) (well, c.l.py is probably one of the friendliest
groups on usenet, but still, this is usenet).
--
bruno desthuilliers
python -c print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in '[EMAIL PROTECTED]'.split('@')])
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Wikipedia - conversion of in SQL database stored data to HTML
Is there an already available script/tool able to extract records and generate proper HTML code out of the data stored in the Wikipedia SQL data base? e.g. converting all occurences of [[xxx|yyy]] to a href=xxxyyy/a etc. Or even better a script/tool able to generate and write to the disk all the HTML files if given the MMDDD_cur_table.sql data, so that the Wikipedia content becomes available on local computer without running a server? By the way: has someone succeeded in installation of a local Wikipedia server? As I remember the problem caused me to fail on this was that mySQL server was not able to handle a database larger than 2 GByte (the english part of current data and usually the ..._old_table.sql exceed this size). Claudio -- http://mail.python.org/mailman/listinfo/python-list
python-dev Summary for 2005-03-01 through 2005-03-15
[The HTML version of this Summary is available at http://www.python.org/dev/summary/2005-03-01_2005-03-15.html] = Summary Announcements = - Second to last summary for me - Just a reminder, after this Summary there is only one more left for me to write. After that Tim Lesher, Tony Meyer, and Steven Bethard will be taking over. - See you at PyCon! - PyCon_ is practically upon us! If you are going to be there, great! Please feel free to say hello if you run into me (will be at the sprints and the conference Wednesday and Thursday; skipping Friday to see a friend). Always happy to stop-and-chat. .. _PyCon: http://www.pycon.org/ 2.4.1 should be out soon Python 2.4c2 has now been released. Assuming no major issues come up, 2.4 final will be out March 29; day after PyCon. But in order to make sure no issues come up, we need the code to be tested! Please get the code and run the regression tests. If you are on a UNIX system it is as easy as running ``make test`` (``make testall`` is even better). The tests can also be run on non-UNIX systems; see http://docs.python.org/lib/regrtest.html on how. = Summaries = -- 2.4 should be out soon -- Python 2.4.1c1 was releaseed, but enough bugs were found and subsequently fixed that c2 release will occur before 2.4 final comes out. Contributing threads: - `2.4.1c1 March 10th, 2.4.1 March 17th http://mail.python.org/pipermail/python-dev/2005-March/051832.html`__ - `BRANCH FREEZE for 2.4.1rc1, UTC, 2005-03-10 http://mail.python.org/pipermail/python-dev/2005-March/051929.html`__ - `branch release24-maint is unfrozen, 2.4.1rc2? http://mail.python.org/pipermail/python-dev/2005-March/052017.html`__ - `os.access and Unicode http://mail.python.org/pipermail/python-dev/2005-March/051906.html`__ - `RELEASED Python 2.4.1, release candidate 1 http://mail.python.org/pipermail/python-dev/2005-March/051992.html`__ - `distutils fix for building Zope against Python 2.4.1c1 http://mail.python.org/pipermail/python-dev/2005-March/052068.html`__ - `Python2.4.1c1 and win32com http://mail.python.org/pipermail/python-dev/2005-March/052080.html`__ - `Open issues for 2.4.1 http://mail.python.org/pipermail/python-dev/2005-March/052099.html`__ --- Getting state of all threads in interpreter --- Florent Guillaume wrote some code for Zope that returned the current state of all threads in the interpreter, regardless of whether they were hung or not. Tim Peters suggested someone write up some code so that this could be made available in Python itself. Fazal Majid has volunteered to implement this. Contributing threads: - `Useful thread project for 2.5? http://mail.python.org/pipermail/python-dev/2005-March/051856.html`__ - No new features in micro releases - A bug in os.access() not allowing Unicode strings triggered the discussion of whether it was a bugfix to repair the issue or a new feature. In the end it was decided it was a bugfix. But the point was specified that micro releases should never have any new feature, no matter how small. Contributing threads: - `[Python-checkins] python/dist/src/Modules ossaudiodev.c, 1.35, 1.36 http://mail.python.org/pipermail/python-dev/2005-March/051889.html`__ - `No new features http://mail.python.org/pipermail/python-dev/2005-March/051919.html`__ - `os.access and Unicode http://mail.python.org/pipermail/python-dev/2005-March/051906.html`__ - `rationale for the no-new-features approach http://mail.python.org/pipermail/python-dev/2005-March/051930.html`__ - Python wins Jolt Productivity Award - Python was runner-up in the `15th annual Jolt Awards`_ in the category of Languages and Development Environments, being given the Productivity Award. Python is now award-winning. =) .. _15th annual Jolt Awards: http://www.sdmagazine.com/jolts/15th_jolt_finalists.html Contributing threads: - `FWD: SD MAgazine.com - Jolt Awards Winners http://mail.python.org/pipermail/python-dev/2005-March/052008.html`__ - `Python 2.4 won the Jolt productivity award last night http://mail.python.org/pipermail/python-dev/2005-March/052246.html`__ -- New built-ins: any() and all() -- Python 2.5 gains two new built-ins: any(), which returns True if the iterable passed to it contains any true items, and all(), which returns True if all the items in the iterable passed to it are true. Contributing threads: - `Adding any() and all() http://mail.python.org/pipermail/python-dev/2005-March/052010.html`__
Re: spaces in re.compile()
Maybe you want r'\b'. From 'pydoc sre': \b Matches the empty string, but only at the start or end of a word. import re r = re.compile( r'\btest\b' ) print r.findall(testy) print r.findall( testy ) print r.findall( test ) print r.findall(test) pgps8PNW4uDgh.pgp Description: PGP signature -- http://mail.python.org/mailman/listinfo/python-list
spaces in re.compile()
Is it possible to use spaces in a re.compile()?
For example, I want to make sure one space exists right before this
string and right after it:
re.compile ('\d{3,3}\.\d{3,3}\.\d{3,3}\.\d{3,3}')
I've tried this, but it didn't work:
re.compile (' \d{3,3}\.\d{3,3}\.\d{3,3}\.\d{3,3} ')
Any ideas?
--
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Re: exec src in {}, {} strangeness
Do Re Mi chel La Si Do wrote: Hi ! Try : exec f in globals(),locals() or exec(f,globals(),locals()) or exec f in globals(),globals() or exec(f,globals(),globals()) Indeed, using 'globals()' and 'locals()' works. However, both report the same underlaying object, which is a bit confusing. (Under what circumstances does 'locals()' return not the same object as 'globals()' ?) The problem appears to be that exec f in a, b where a and b are distinct dictionaries, does not look up symbols in 'a' when in local scope. I filed a bug report (#1167300). Regards, Stefan -- http://mail.python.org/mailman/listinfo/python-list
Re: Software for Poets (Was: Re: Text-to-speech)
This is about poetry. I think the next reply should be done privately unless someone else is interested in it. Hi, Le dimanche 20 Mars 2005 23:04, Paul Rubin a écrit : Francis Girard [EMAIL PROTECTED] writes: 4- Propose a synonym that will fit in a verse, i.e. with the right amount of syllabs 5- Suggest a missing word or expression in a verse by applying the Shannon text generation principle ... First, do you think it may be a useful tool ? What other features you think can make it usefull for a poet ? I'm skeptical of this notion. You can think of writing a poem as building up a tree structure where there's a root idea you're trying to express, branches in the choices of images/comparisons/etc. that you use to express the idea, and leaves that are the actual words in the poem. Rhyme means that a left-to-right traversal of the leaves (i.e. reading the words) results in a pattern with a certain structure. You're proposing a tool that helps explore the search space in the nodes near the bottom level of the tree, to find words with the right characteristics. I think the constraint of rhyme and meter is best served by widening the search space at the upper levels of the tree and not the lower levels. That is, if you've got an image and you don't find rhyming words for it with easy natural diction, a computerized search for more and more obscure words to express that image in rhyme is the last thing you want. Absolutly right. Rather, you want to discard the image and choose a different one to express the idea. That means seeking more images by mentally revisiting and staying inside the emotion at the center of poem, a much more difficult thing to do than solving the mere math problem of finding a string of rhyming words with similar semantics to a non-rhyming sequence that you already have. Again, right. Your description comes very close to my own experience of writing poems and I never read something as clear as what I'm reading here. Poetry practice is described most of the time in poetic terms just like religion is described in religious terms. And one has to impregnate himself with these words to, little by little, gain some understanding of it. Your description proves that it is possible to describe it otherwise. I am truly marvelled. The question is : how do you discard the image to choose another one ? How this process takes place ? I observed myself while writing a poem (I, myself, may not be good example since I am certainly not a good poet) and discovered that it is while playing with the words, trying to find the right one, with the right number of syllabs, that I discover a new image, and re-write the whole verse, even re-arranging the whole strophe or poem. My goal with the two last tasks (4 and 5) was to help the poor guy struggling with the words, not to produce the correct final verse, but only to help him in one of the phase of his writing. But when you find the right image, the words and rhythm fall into place without additional effort. I don't believe much in this. Poetry and writing in general is work, work, work and more work. This is why writing good poems is hard, and is also why the results of doing it well is powerful. I don't think it can be programmed into a computer using any current notions. Again right. My goal, of course, is not to substitute the poet by a computer. Only help him in some of his mechanical tasks. Regards Francis Girard -- http://mail.python.org/mailman/listinfo/python-list
Re: exec src in {}, {} strangeness
Stefan Seefeld wrote: Indeed, using 'globals()' and 'locals()' works. However, both report the same underlaying object, which is a bit confusing. (Under what circumstances does 'locals()' return not the same object as 'globals()' ?) When you aren't at the interactive prompt... there are no locals there, so locals() just maps through to globals(). (Probably this applies to all code at the module level, as oppsed to code inside any callable, but I haven't verified... you can easily enough.) Does this information invalidate your bug report? -Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: simultaneous copy to multiple media
This is small tool I've wrote, that does use large memory buffers with asynchronous I/O to copy file. Claudio Grondi wrote: Thank you! This (with a drawback of blocking the entire system) does it! ( dzie dobry i dzikuj za t konstruktywn odpowied na moje pytanie ) :) From my point of view this thread has reached its end (I have a solution I can live with), except if someone would like to contribute or point to a better multicopy.exe which does not block the system Symptoms (high cpu usage, unresponsive system) look similar to situation when you try to read/write as fast as possible from/to IDE drive running in PIO mode. I think that it's either USB driver problem, or inherent design flaw in USB (anyone?). Anyway, I've added buffersize and sleeptime options to multicopy, so you may try to throttle it down. Download it here: http://mastermind.com.pl/multicopy/ HTH, sc0rp. -- http://mail.python.org/mailman/listinfo/python-list
Re: Save passwords in scripts
Florian Lindner wrote: I've a scripts that allows limited manipulation of a database to users. This script of course needs to save a password for the database connection. The users, on the other hand need read permission on the script in order to execute it but should not be able to read out the password. What is the common way to solve this problem? The common way is to do something ill-conceived and insecure. The correct approach is to use a secure technique that does not involve storing the passwords themselves, but instead storing a hash version of them (e.g. MD5 or SHA), or by requiring the users to enter their passwords at the time the information is required. My current way is to allow the users to execute the script with sudo while not having read permission when acting as a ordinary user. But I don't like this solutions and consider it very ugly. Storing passwords in the clear is always ugly and insecure. Think about the situation where a user (unwisely) picks a password that he also uses for, say, his online banking. If the password is stored in the clear, then anyone with root access can see it and even if you trust all your administrators, or are the only admin yourself, it's still not a good idea to let an admin see a user's password. -Peter -- http://mail.python.org/mailman/listinfo/python-list
pyopengl and py2exe
Hello All! My program in python uses PyOpenGL and I need to convert it to a standalone windows executable file. Following to these instructions (http://pyopengl.sourceforge.net/documentation/py2exe.html) I've put PyOpenGL package to a directory where my program was placed. and run the script: setup.py py2exe --excludes=OpenGL but it prints such error messages: ... *** copy extensions *** copying C:\Python23\DLLs\_sre.pyd - C:\cg\dist *** copy dlls *** copying C:\Python23\w9xpopen.exe - C:\cg\dist copying C:\WINNT\system32\python23.dll - C:\cg\dist setting sys.winver for 'C:\cg\dist\python23.dll' to 'py2exe samples' copying C:\Python23\lib\site-packages\py2exe\run.exe - C:\cg\dist\hello.exe The following modules appear to be missing ['OpenGL.GL', 'OpenGL.GLE', 'OpenGL.GLUT'] ? -- Kirill -- http://mail.python.org/mailman/listinfo/python-list
Re: Text-to-speech
Paul McGuire said unto the world upon 2005-03-21 03:10: How about a clerihew instead of a limerick? Guido van Rossum Had an idea most awesome. When he lost track of his braces, Just replaced them with spaces. -- Paul McGuire Hi all, that's pretty good, Paul. However, I must insist that you both cease and desist. Your Allusion to the computational instructional language Python, through the inclusion of 'brace' (and its derivative forms) and 'space' (and its derivative forms) in a rhyming couplet in a comedic verse, while quite amusing, is a clear violation of my Intellectual Property. My Intellectual Property rights are attested to by my extant prior art http://tinyurl.com/4bu3n, the patent application pending before the Patent Office of The Republic of Freedonia covering same, and Darl McBride's say-so. Having drafted a patent application covering the use of 'space' and 'brace' in poetic contexts, I saw no good reason to stop there. Hence, the pending patent application also covers both the use of braces and whitespace as delimiters (block or otherwise) in any language or set of instructions, (natural, computational or otherwise artificial). So, I must also demand that you, and the rest of the Python community immediately cease and desist from producing any instructions, in any language, which employ either of these syntactic constructs to represent either structure or relations of logical dependency. Please do note that I make no claim to 'ENDSUB' and like constructs; insofar as my Intellectual Property rights are concerned, you are free to employ such constructs, in any linguistic expression, including, but not limited to, provision of instruction and poetic expression, regardless of context or language in which they are employed. A formal statement of my position shall be forthcoming from my solicitors, the illustrious firm of Dewey, Cheatem, Howe. I am optimistic that we will be able to arrive at licencing terms both fair and equitable. I remain your most faithful servant, Brian vdB -- http://mail.python.org/mailman/listinfo/python-list
Re: Python becoming less Lisp-like
Antoon Pardon wrote: Op 2005-03-18, Jeff Shannon schreef [EMAIL PROTECTED]: I find it odd that you start by saying you still find them very consistent and here state there is a slight inconsistency. I said that the way that binding a name on a class instance always creates an instance attribute regardless of the presence of a similarly-named class attribute is consistent with the way that name binding works in any scope. This is true. Binding of a name within a function-local scope works the same way -- bindings are always created within the narrowest scope unless something is explicitly done to force other behavior. You pointed out a case in which class/instance attributes behave slightly differently than local/global names do, and I agree with you that there is a difference in behavior there. However, that difference is in the way that bare names are resolved into local/global references, and *not* in the way that name binding works. The name binding rules are consistent; the inconsistency is in name *lookups*, and is a case of strong optimization of the standard case affecting the behavior of an unusual (and strongly discouraged) case. There is a slight inconsistency in something *other* than what the O.P. was complaining about being inconsistent; I'm recognizing that inconsistency at the same time as I'm attempting to point out that the other inconsistency really *is* consistent. (I'm also pointing out that this name-lookup inconsistency is a good example of practicality beats purity, because the value of the optimization is, IMO, much greater than the cost of the inconsistency.) Jeff Shannon -- http://mail.python.org/mailman/listinfo/python-list
Re: Python limericks (was Re: Text-to-speech)
Tim Churches wrote: ... My first attempt (which does not scan properly): A Dutch mathematician most prophetic, Did invent a language, name herpetic. With design quite intelligent, And syntax mostly elegant, Big ideas could be made non-hypothetic. To improve the scan: A mathematician, prophetic, invented a language, herpetic. decidedly brilliant, syntacticly elegant, Made ideas far less hypothetic. --Scott David Daniels [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
Re: exec src in {}, {} strangeness
Peter Hansen wrote: Stefan Seefeld wrote: Indeed, using 'globals()' and 'locals()' works. However, both report the same underlaying object, which is a bit confusing. (Under what circumstances does 'locals()' return not the same object as 'globals()' ?) When you aren't at the interactive prompt... there are no locals there, so locals() just maps through to globals(). (Probably this applies to all code at the module level, as oppsed to code inside any callable, but I haven't verified... you can easily enough.) Does this information invalidate your bug report? No, but that's possibly only because I don't (yet) understand the implications of what you are saying. Is there anything wrong with 'exec source in a, b' where a and b are distinc originally empty dictionaries ? Again, my test code was class Foo: pass class Bar: foo = Foo and it appears as if 'Foo' was added to 'a', but when evaluating 'foo = Foo' the interpreter only looked in 'b', not 'a'. Thanks, Stefan -- http://mail.python.org/mailman/listinfo/python-list
Re: Save passwords in scripts
Peter Hansen wrote: Florian Lindner wrote: I've a scripts that allows limited manipulation of a database to users. This script of course needs to save a password for the database connection. The users, on the other hand need read permission on the script in order to execute it but should not be able to read out the password. What is the common way to solve this problem? The common way is to do something ill-conceived and insecure. The correct approach is to use a secure technique that does not involve storing the passwords themselves, but instead storing a hash version of them (e.g. MD5 or SHA), or by requiring the users to enter their passwords at the time the information is required. Hashes could not work, since I need to give the password to a DB server. My script is the client, not the server. It does not check passwords supplied by the users, just use the hard-coded password to connect to the DB server. My current way is to allow the users to execute the script with sudo while not having read permission when acting as a ordinary user. But I don't like this solutions and consider it very ugly. Storing passwords in the clear is always ugly and insecure. Think about the situation where a user (unwisely) picks a password that he also uses for, say, his online banking. If the password is stored in the clear, then anyone with root access can see it and even if you trust all your administrators, or are the only admin yourself, it's still not a good idea to let an admin see a user's password. It's not a users password. It's a password of a db user which owns several system tables and the users should be able to manipulate them in a constrained manner. I fully agree with you. That's why I'm looking for a better, more secure solution. Florian -- http://mail.python.org/mailman/listinfo/python-list
Re: remove strings from source
I am in debt with you of an answer on my solution in removing literal strings... I apologize not to have followed your suggestions but I am just learning Python, and your approach was too difficult for me! I've already developed the cross reference tool, and for that I identified two types of literals (the standard one which I named in general s~ and the multi-line or triple quoted strins, which I called m~). You can see a step in my appproach to the solution in an answer to Fredrik Lundh http://groups.google.it/groups?q=qwweeeithl=itlr=group=comp.lang.python.*selm=2ab23d7a.0503190647.2c15c281%40posting.google.comrnum=2 After that I have almost completed the application, and better than explanations you can see the result (a small extract). 052 PROGNAME: PROGNAME = sys.argv[0] 053 AUTHOR: AUTHOR = us~.encode(s~) 054 VERSION: VERSION = s~ 056 URL_BASE: URL_BASE = s~ 057 OUTPUT_HTML: OUTPUT_HTML = s~ etc... The cross references are mainly useful for variables, but I use them also for Python reserved words, to learn the language and also classes and functions. For small applications there is no need for my toool, but with a source of almost 1 Mb... (like Pysol). Excuse if I don't go deeper in my solution for removing strings, but it is so standard that there is nothing to learn ... Bye. -- http://mail.python.org/mailman/listinfo/python-list
Re: getting text from WinXP console
Jeff Schwab wrote: Lucas Raab wrote: Chris Maloof wrote: Hello, Does anyone know how I can read the ASCII text from a console window (from another application) in WinXP? It doesn't sound like a major operation, but although I can find the window via pywin32, I haven't been able to do anything with it. I'd really just like to get the window text into a string. By console window, I mean the sort of thing that comes up when you run command (although this particular one is for the game NetHack). Thanks, Chris If you're looking to do this from Python then do python appname.py output.txt only without the quotes. AFAIK, this only works on Windows. Correct me if it works from Linux or another OS. It works on Unix. :) Alright. Thanks, I wasn't sure. -- -- Lucas Raab lvraab located at earthlink.net dotpyFE located at gmail.com AIM:Phoenix11890 MSN:[EMAIL PROTECTED] IRC:lvraab ICQ:324767918 Yahoo: Phoenix11890 -- http://mail.python.org/mailman/listinfo/python-list
Re: Getting directory size
Peter Hansen wrote:
francisl wrote:
How can we get a full directory size (sum of all his data)?
like when we type `du -sh mydir`
Because os.path.getsize('mydir') only give the size of the
directory
physical representation on the disk.
os.popen('du -sh mydir') would be one approach.
The harder way is to use os.walk('mydir') to scan all
files in all subdirectories, and use os.stat() or
os.path.getsize() to add up the sizes of each file.
With Orendorff's path module, this becomes a two-liner:
from path import path
dir_size = sum([f.size for f in path('mydir').walkfiles()])
With Python 2.4 genexps, you don't even need the square brackets...
http://www.jorendorff.com/articles/python/path/
Shoulda-been-added-to-the-standard-library'ly yours,
-- Graham
--
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Re: exec src in {}, {} strangeness
Stefan Seefeld [EMAIL PROTECTED] writes: Is there anything wrong with 'exec source in a, b' where a and b are distinc originally empty dictionaries ? Again, my test code was class Foo: pass class Bar: foo = Foo and it appears as if 'Foo' was added to 'a', but when evaluating 'foo = Foo' the interpreter only looked in 'b', not 'a'. No, it's the other way round. Foo is added in b since bindings are done in the local scope. Your case is a bit more complicated, though. Here's what I think happens: class Foo is bound in b, the locals dictionary, so there is no reference to Foo in the globals dictionary. The body of class B is executed with it's own new locals dictionary. That locals dictionary will effectively be turned into Bar.__dict__ when the class object is created. When foo = Foo is executed, Foo is first looked up in that new locals dictionary. That fails, so it's also looked up in the globals dictionary a. That fails as well because Foo was bound in b. The final lookup in the builtins also fails, and thus you get an exception. Bernhard -- Intevation GmbH http://intevation.de/ Skencil http://skencil.org/ Thuban http://thuban.intevation.org/ -- http://mail.python.org/mailman/listinfo/python-list
Re: exec src in {}, {} strangeness
Bernhard Herzog wrote: Stefan Seefeld [EMAIL PROTECTED] writes: Is there anything wrong with 'exec source in a, b' where a and b are distinc originally empty dictionaries ? Again, my test code was class Foo: pass class Bar: foo = Foo and it appears as if 'Foo' was added to 'a', but when evaluating 'foo = Foo' the interpreter only looked in 'b', not 'a'. No, it's the other way round. Foo is added in b since bindings are done in the local scope. Your case is a bit more complicated, though. Here's what I think happens: class Foo is bound in b, the locals dictionary, so there is no reference to Foo in the globals dictionary. The body of class B is executed with it's own new locals dictionary. That locals dictionary will effectively be turned into Bar.__dict__ when the class object is created. When foo = Foo is executed, Foo is first looked up in that new locals dictionary. That fails, so it's also looked up in the globals dictionary a. That fails as well because Foo was bound in b. The final lookup in the builtins also fails, and thus you get an exception. Thanks for the explanation ! I'm still unable to make a conclusion: What is wrong ? Am I doing something stupid (I did try various things such as inserting __builtin__ into the dictionary, etc.) ? Or is that really a bug ? Thanks, Stefan -- http://mail.python.org/mailman/listinfo/python-list
Re: Wikipedia - conversion of in SQL database stored data to HTML
Claudio Grondi wrote: Is there an already available script/tool able to extract records and generate proper HTML code out of the data stored in the Wikipedia SQL data base? They're not in Python, but there are a couple of tools available here: http://tinyurl.com/692pt. By the way: has someone succeeded in installation of a local Wikipedia server? I loaded all of the Wikipedia data into a local MySQL server a while back without any problems. I haven't attempted to run Mediawiki on top of that, but I don't see why that wouldn't work. -- http://mail.python.org/mailman/listinfo/python-list
Re: [ann] fdups 0.15
Patrick Useldinger wrote: I am happy to announce version 0.15 of fdups. Cool. For reference have a look at: http://www.pixelbeat.org/fslint/ Pádraig. -- http://mail.python.org/mailman/listinfo/python-list
Re: Getting directory size
francisl wrote:
How can we get a full directory size (sum of all his data)?
like when we type `du -sh mydir`
Because os.path.getsize('mydir') only give the size of the directory
physical representation on the disk.
Have a look at:
http://www.pixelbeat.org/scripts/dutop
Pádraig.
--
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Re: Save passwords in scripts
Florian Lindner wrote: Hello, I've a scripts that allows limited manipulation of a database to users. This script of course needs to save a password for the database connection. The users, on the other hand need read permission on the script in order to execute it but should not be able to read out the password. What is the common way to solve this problem? My current way is to allow the users to execute the script with sudo while not having read permission when acting as a ordinary user. But I don't like this solutions and consider it very ugly. Thanks, Florian Which DB? afaik postgre has user-level authentication which means you don't even need a password. /Esben -- http://mail.python.org/mailman/listinfo/python-list
Re: getting text from WinXP console
If you re-direct the output to a file, then you won't see it on the console at all, unless the program writes to stderr separately. -- http://mail.python.org/mailman/listinfo/python-list
Re: getting text from WinXP console
Are you the one who is launching the Nethack program, or is it already running, and you ar e trying to capture the text after Nethack is launched ? If you are launching it you can try using one of the python popen() calls to redirect the screen output to your python program. I havne't doen this myself, but I've seen this suggested to many people who have asked a similar question. Also- you can try posting a message to the Python Tutor- as well as googling for python popen, to look for examples. Another alternative, is to use the tee.exe unix util (ported to wn32) which will duplicate screen I/O to a file, or some other place. Try googling for unix utilities win32 -or similar combinations of these words. -- http://mail.python.org/mailman/listinfo/python-list
Re: spaces in re.compile()
Jeff Epler wrote: Maybe you want r'\b'. From 'pydoc sre': \b Matches the empty string, but only at the start or end of a word. import re r = re.compile( r'\btest\b' ) print r.findall(testy) print r.findall( testy ) print r.findall( test ) print r.findall(test) That works great. Thanks for the tip! -- http://mail.python.org/mailman/listinfo/python-list
Re: generating audio signals
Maybe make yourself a little utility first that will show you the specs for any .wav file (i.e., sampling frequency, bytes per sample, channels, etc.) You can do this with one function call - wave.Wave_read.getparams() import wave wave.open(filename,b) wave.Wave_read.getparams() -- http://mail.python.org/mailman/listinfo/python-list
Re: missing? dictionary methods
Antoon Pardon [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] For the moment I frequently come across the following cases. 1) Two files, each with key-value pairs for the same dictionary. However it is an error if the second file contains a key that was not in the first file. In treating the second file I miss a 'set' method. dct.set(key, value) would be equivallent to dct[key] = value, except that it would raise a KeyError if the key wasn't already in the dictionary. 2) One file with key-value pairs. However it is an error if a key is duplicated in the file. In treating such files I miss a 'make' method. dct.make(key, value) would be equivallent to dct[key] = value. except that it would raise a KeyError if the key was already in the dictionary. What do other people think about this? To me, one of the major problems with OOP is that there are an unbounded number of functions that we can think of to operate on a date structure and thus a continual pressure to turn functions into methods and thus indefinitely expand a data structure class. And whatever is the least used current method, there will always be candidates which are arguably at least or almost as useful. And the addition of one method will be seen as reason to add another, and another, and another. I was almost opposed to .get for this reason. I think dict has about enough 'basic' methods. So, without suppost from many people, your two examples strike me as fairly specialized usages best written, as easily done, as Python functions. Terry J. Reedy -- http://mail.python.org/mailman/listinfo/python-list
Re: Please help for Python programming
This is what I see (minus the ' '): while 1: user, serviceType, msgType, inOut, date, time, numBytes = aLog.GetNextMessage() [etc] Advice: use spaces, not tabs, to indent posted code (some readers discard tabs). Don't use google groups to post code (it deletes initial spaces and won't, apparently, fix this bug). Use news.gmane.org group gmane.comp.python.genral instead (I believe they also have web interface in addition to newsreader interface). If you really, really must post thru google, prefix lines with char such as '|', even tho this kill cut and pastability. Terry J. Reedy -- http://mail.python.org/mailman/listinfo/python-list
Re: Save passwords in scripts
Florian Lindner [EMAIL PROTECTED] writes: I've a scripts that allows limited manipulation of a database to users. This script of course needs to save a password for the database connection. The users, on the other hand need read permission on the script in order to execute it but should not be able to read out the password. What is the common way to solve this problem? My current way is to allow the users to execute the script with sudo while not having read permission when acting as a ordinary user. But I don't like this solutions and consider it very ugly. There's not a one-size-fits-all answer. A bunch of possibilities: - Just have execute permission on the script, not read permission - If the database server and client are running on the same machine, use a unix-domain socket instead of a tcp socket, and modify the server to check that only a specific uid is running the client (you can do this check with an ancillary message on the socket). Then use sudo to get the client to run as that user. You can then leave read permission enabled on the script. - sort of similar: have a separate process running that knows the password (administrator enters it at startup time). That process listens on a unix socket and checks the ID of the client. It reveals the password to authorized clients, i.e. your readable script running under sudo. This keeps the password from ever being stored on disk. - Modify the script itself to run as a long-running service instead of as something that gets started and restarted all the time. Have an admin start it and type the password into it at startup time. Users then connect to it (maybe with a web browser) and send it commands. - Move the user operations from the script to server side database procedures that do their own validity checking. Then you don't need a password. - Run the script on a machine where users can't run arbitrary programs other than the script. Set up the db server to not accept any connections other than from that machine. Etc. etc., you get the idea. -- http://mail.python.org/mailman/listinfo/python-list
Re: Python limericks (was Re: Text-to-speech)
Scott David Daniels [EMAIL PROTECTED] writes: A mathematician, prophetic, invented a language, herpetic. decidedly brilliant, syntacticly elegant, syntactically elegant, with features intelligent Made ideas far less hypothetic. Made writing new code copasetic. -- http://mail.python.org/mailman/listinfo/python-list
Python 2.4 (Windows) Binaries of SciPy
Hello, I have posted a similar message in SciPy mailing list. I hope it is ok to also post it here. I am looking for Python 2.4 Binaries (Windows)of SciPy. Are there any plans to upload Python 2.4 binaries? Best Regards, /Srijit -- http://mail.python.org/mailman/listinfo/python-list
Re: getting text from WinXP console
Lucas Raab wrote: Chris Maloof wrote: Does anyone know how I can read the ASCII text from a console window (from another application) in WinXP? It doesn't sound like a major operation, but although I can find the window via pywin32, I haven't been able to do anything with it. I'd really just like to get the window text into a string. By console window, I mean the sort of thing that comes up when you run command (although this particular one is for the game NetHack). If you're looking to do this from Python then do python appname.py output.txt only without the quotes. AFAIK, this only works on Windows. Correct me if it works from Linux or another OS. It works in *nix (and probably other OSes as well) to the same extent that it works in Windows. However, it does *not* do what the OP was asking for -- it captures the (console-mode) output of appname.py into a file, but the OP (as I understand it) wanted to have appname.py capture the already-displayed console output of someotherapp.exe. Unless I'm seriously mistaken, the only way that this will be possible is if there's a Win32 API call that will give the correct information. This might be possible to find in the MSDN documentation, if it exists, but I suspect that it probably doesn't. Actually, there's probably a second way -- capture the window image as a bitmap, and then run OCR software on it. I'm not sure how well most OCR software will deal with ASCII graphics, though -- they tend to be optimized for reading real text (i.e. words in an actual language). If it's permissible for the capturing program to start the application whose output is to be captured, then it may be possible to work as a proxy -- the capture app would pass (almost) all input to the child app and then retrieve the child app's output (and probably perform the actual display on-screen). This won't let you capture the text of an arbitrary window, though, and would probably be pretty fragile. Jeff Shannon -- http://mail.python.org/mailman/listinfo/python-list
Re: Python scope is too complicated
jfj [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] def foo(x): y= (i for i in x) return y From the disassembly it seems that the generator is a code object What is type(foo([1,2,3])) ? but 'x' is not a cell variable. WTF? As I understand it, the object 'x' binds to is immediately used to create the generator object. The local name is just a dummy that is not part of the result. I believe that the above is equivalent to def foo(x): def _(z): for i in z: yield i return _(x) although I suspect that the implementation builds the generator more directly. Terry J. Reedy -- http://mail.python.org/mailman/listinfo/python-list
Re: xmlrpc with Python and large datases
Duncan, Thanks for the reply. We are running this on an Apache server on the linux box, and an iPlanet4.1 server on the solaris machines. However, both these servers are strictly 'inside' the firewall. I checked the apache configuration and there is no limitrequestbody parameter in the file at all. So I'm assuming from what you've said that our configuration would be unlimited. However, I will test that by inserting limitrequestbody and setting it to 0 for unlimited to see if that changes things. Thanks, Doug -- http://mail.python.org/mailman/listinfo/python-list
Re: Sending hex number as is
[EMAIL PROTECTED] wrote: This question may be ased before, but I couldn't find the answer searching the archive. Basically, I just want to send a hex number from one machine to the next: for example msg = Length is n = '\x81' msg += n sock.send(msg) The problem is n's value is not fixed. For example, msg = Length is n = len(somestring) msg += n # This won't work of course, since n is int How do I send this msg + n? Thanks, Khoa Just send the number as a string? (and parse it to an int again on the other side) Or investigate the struct and/or pickle modules. Alternatively, depending on the broader scope of what you are doing, investigate a proper IPC library such as Pyro. --Irmen -- http://mail.python.org/mailman/listinfo/python-list
PIGIP Meeting tonight -- Python Interest Group In Princeton
PIGIP will hold it's March meeting tonight at 7pm at the Lawrenceville Public Library. Anyone in Central New Jersey, USA interested in the Python Programming Language is invited to attend. We will be reviewing the Python tutorial (Chapters 6,7,and 8), and open discussion about Python use will be encouraged. Light refreshments will be served at the meeting. For more information visit http://www.pigip.org -- Jon Fox -- http://mail.python.org/mailman/listinfo/python-list
Re: Text-to-speech
Brian, Having reviewed your Cease and Desist petition, I'm afraid I must dispute some or all of your claims: 1. Your citation of prior art has one or more significant defects: a. In your citation, brace is clearly rhymed with whitespace, not space. The broad concept of whitespace is substantially different from the specific term spaces: whitespace encompasses all white-printing characters, including tabs, formfeeds, and carriage returns, as well as space characters. In the more general field of publishing, whitespace also includes page margins, paragraph breaks, and block indentations for embedded quotes or subsections. In my submission, spaces is specifically intended to narrowly refer to the character defined in ISO 8879 as ASCII code 32. Especially, I did *not* intend to include reference to the ISO 8879 ASCII code 9 character, or tab. b. Prior art predates your citation, see Guido van Rossum's post [marketing-python] How About a Slogan or Tagline?, at http://wingware.com/pipermail/marketing-python/2002-March/003851.html, which includes several notable references to derivative forms of brace and space. 2. As the Python language's most salient feature is its usage of spaces for program structuring, as opposed to use of enclosing brace characters in related scripting languages (Tcl, Perl) and compiled languages (C, C++, Java, C#), the juxtaposition of brace and space in any poetic construct is obvious, and this obviousness further erodes your IP claim. 3. I think my poem was funnier - lost track of his braces (humorous allusion to suspenders) is a knee-slapper! (Perl before swine was cute, but it's not new.) Still, I am open to negotiation - would you be interested in cross-licensing my patent pending rhyming of van Rossum and awesome? Regards, -- Paul -- http://mail.python.org/mailman/listinfo/python-list
Re: Sending hex number as is
On 2005-03-21, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: msg = Length is n = '\x81' msg += n sock.send(msg) The problem is n's value is not fixed. For example, msg = Length is n = len(somestring) msg += n # This won't work of course, since n is int How do I send this msg + n? n = 0x81 msg = Length is + chr(n) That only works for hex numbers than can be properly encoded as a character in the default encoding. See the struct module for a more general solution. -- Grant Edwards grante Yow! There's a lot of BIG at MONEY in MISERY if you have visi.coman AGENT!! -- http://mail.python.org/mailman/listinfo/python-list
Re: Pre-PEP: Dictionary accumulator methods
Michele Simionato [EMAIL PROTECTED] wrote: FWIW, here is my take on the defaultdict approach: def defaultdict(defaultfactory, dictclass=dict): class defdict(dictclass): def __getitem__(self, key): try: return super(defdict, self).__getitem__(key) except KeyError: return self.setdefault(key, defaultfactory()) return defdict d = defaultdict(int)() d[x] += 1 d[x] += 1 d[y] += 1 print d d = defaultdict(list)() d[x].append(1) d[x].append(2) d[y].append(1) print d Michele Simionato Best solution so far. If it wasn't for the really bad decision to add the dict(**kwargs) constructor, I'd love to see something like d = dict(valType=int) d[x] += 1 George -- http://mail.python.org/mailman/listinfo/python-list
Re: wxPython vs. pyQt
since I'm developing in Tkinter, I'm intrigued by your comment that: It allowed me to do things in hours, which literally took weeks with tkinter, please elaborate! Cheers S -- http://mail.python.org/mailman/listinfo/python-list
Re: For loop extended syntax
George Sakkis wrote: A generalization of the 'for .. in' syntax that would handle extra arguments the same way as functions would be: for (x,y,z=0,*rest) in (1,2,3), (3,4), (5,6,7,8): print x, y, z, rest I'd love to see this in python one day; it is pretty obvious what it would do for anyone familiar with function argument tuples. Let's all keep in mind that for...in... is using standard tuple unpacking rules (you're getting the next tuple from a list of tuples, and then unpacking that tuple), so what is really being proposed are extensions to tuple unpacking. (Making this work in the context of a for loop but not work in other tuple-unpacking situations would create inconsistency.) Function arguments are *not* (in general) a case of tuple unpacking, on the other hand, so the parallels between function arguments and for loop control-variable tuples are not so straightforward as is being claimed. There may be valid arguments in favor of enhancing tuple unpacking in this way (indeed, I believe I recall a thread or two on this subject), but it's important to consider the general consequences, not just the single aspect of for-loop usage. Jeff Shannon -- http://mail.python.org/mailman/listinfo/python-list
Re: Text-to-speech
On 21 Mar 2005 12:47:07 -0800, Paul McGuire [EMAIL PROTECTED] wrote: Brian, Having reviewed your Cease and Desist petition, I'm afraid I must dispute some or all of your claims: 1. Your citation of prior art has one or more significant defects: a. In your citation, brace is clearly rhymed with whitespace, not space. The broad concept of whitespace is substantially different from the specific term spaces: whitespace encompasses all white-printing characters, including tabs, formfeeds, and carriage returns, as well as space characters. In the more general field of publishing, whitespace also includes page margins, paragraph breaks, and block indentations for embedded quotes or subsections. In my submission, spaces is specifically intended to narrowly refer to the character defined in ISO 8879 as ASCII code 32. Especially, I did *not* intend to include reference to the ISO 8879 ASCII code 9 character, or tab. b. Prior art predates your citation, see Guido van Rossum's post [marketing-python] How About a Slogan or Tagline?, at http://wingware.com/pipermail/marketing-python/2002-March/003851.html, which includes several notable references to derivative forms of brace and space. 2. As the Python language's most salient feature is its usage of spaces for program structuring, as opposed to use of enclosing brace characters in related scripting languages (Tcl, Perl) and compiled languages (C, C++, Java, C#), the juxtaposition of brace and space in any poetic construct is obvious, and this obviousness further erodes your IP claim. 3. I think my poem was funnier - lost track of his braces (humorous allusion to suspenders) is a knee-slapper! (Perl before swine was cute, but it's not new.) Still, I am open to negotiation - would you be interested in cross-licensing my patent pending rhyming of van Rossum and awesome? T'were two coders in c.l.p Who liked to argue legally About copyright All day and night, Just to prove their inanity -- http://mail.python.org/mailman/listinfo/python-list
Re: Sending hex number as is
[EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Basically, I just want to send a hex number from one machine to the next: 'Hex number' is not completely clear. Do you want to send the number in binary form or in text form. Text form is much easier and more dependable, so should be prefered unless you have a good reason for binary. When sending a text string, you still have a choice between decimal and other representations. Again, decimal is easier and more dependable, and therefore prefered, unless the receiving end really demands otherwise. msg = 'The length is %s' % len(something) Terry J. Reedy -- http://mail.python.org/mailman/listinfo/python-list
Re: Wikipedia - conversion of in SQL database stored data to HTML
http://tinyurl.com/692pt redirects (if not just down) to http://en.wikipedia.org/wiki/Wikipedia:Database_download#Static_HTML_tree_dumps_for_mirroring_or_CD_distribution I see from this page only one tool (not a couple) which is available to download and use: http://www.tommasoconforti.com/ the home of Wiki2static Wiki2static (version 0.61, 02th Aug 2004) http://www.tommasoconforti.com/wiki/wiki2static.tar.gz is a Perl script to convert a Wikipedia SQL dump into an html tree suitable for offline browsing or CD distribution. I failed to find any documentation, so was forced to play directly with the script settings myself: $main_prefix = u:/WikiMedia-Static-HTML/; $wiki_language = pl; and running (in the current directory of the script): \ wiki2static.pl Q:\WikiMedia-MySQL-Dump\pl\20040727_cur_table.sql to test the script on a file with small (112 MByte) size of the SQL dump . The script is running now for over half an hour and has created yet 1.555 folders and generated 527 files with a total size of 6 MBytes consuming only 16 seconds of CPU time. I estimate the time until the script is ready to appr. 6 hours for a 100 MByte file, which gives 120 hours for a 2 GByte file of the english dump ... Any further hints? What am I doing wrong? (There are now 1.627 folders and 1.307 files with a total size of 15.6 MB after one hour runtime and consumption of 20 seconds CPU time even if I increased the priority of the process to high on my W2K box running perl 5.8.3 half an hour ago) Claudio P.S. I loaded all of the Wikipedia data into a local MySQL server a while back without any problems. What was the size of the dump file imported to the MySQL database? Importing only the current version which was a while back smaller than 2 GByte (skipping the history dump) causes no problems with MySQL. Leif K-Brooks [EMAIL PROTECTED] schrieb im Newsbeitrag news:[EMAIL PROTECTED] Claudio Grondi wrote: Is there an already available script/tool able to extract records and generate proper HTML code out of the data stored in the Wikipedia SQL data base? They're not in Python, but there are a couple of tools available here: http://tinyurl.com/692pt. By the way: has someone succeeded in installation of a local Wikipedia server? I loaded all of the Wikipedia data into a local MySQL server a while back without any problems. I haven't attempted to run Mediawiki on top of that, but I don't see why that wouldn't work. -- http://mail.python.org/mailman/listinfo/python-list
Re: PyGTK and pyexe
I succeeded :)))
And the winner is:
from distutils.core import setup
import py2exe
opts = {
py2exe: {
includes: [pango, atk, gobject, gtk,gtk.glade],
dll_excludes: [iconv.dll, intl.dll,
libatk-1.0-0.dll, libgdk_pixbuf-2.0-0.dll,
libgdk-win32-2.0-0.dll, libglib-2.0-0.dll,
libgmodule-2.0-0.dll, libgobject-2.0-0.dll,
libgthread-2.0-0.dll, libgtk-win32-2.0-0.dll,
libpango-1.0-0.dll, libpangowin32-1.0-0.dll,
libxml2, libglade-2.0-0, zlib1]
}
}
setup(
name = PyGTKTest,
description = PyGTK Test Application,
version = 0.1,
windows = [{script: test.py, icon_resources: [(1,
test.ico)]}],
options=opts,
data_files=[(, [test.glade])]
)
...
Py2exe reports an error if I try to use --force (the command doesn't
exist), so I use only:
python setup.py py2exe --exclude
gobject,glib,gtk,glade,pango,atk,libglade,xml2,zlib
After that I make a new directory, say MyApp, copy the entire content
of
the GTK folder (I'm using the GTK Runtime Enviroment from
gladewin32.sourceforge.net) in MyApp, and then copy the content of the
dist folder into MyApp\bin.
Now I can uninstall GTK Runtime Enviroment, and Python, and it works
:).
But it's pretty big, what files can I remove? (OK, I know... locales,
man
pages, examples :), but what more - it's still 20 MB?)
--
http://mail.python.org/mailman/listinfo/python-list
Re: PyGTK and pyexe
I remember removing the locales and all of the documentation. Beyond that
I can't remember. If your app falls under the common case of running on
machines with ample disk space, I wouldn't worry too much about the size.
WinZip does a pretty good job of shrinking my distribution file to a
managable size for network transfer.
Tom
Viktor wrote:
I succeeded :)))
And the winner is:
from distutils.core import setup
import py2exe
opts = {
py2exe: {
includes: [pango, atk, gobject, gtk,gtk.glade],
dll_excludes: [iconv.dll, intl.dll,
libatk-1.0-0.dll, libgdk_pixbuf-2.0-0.dll,
libgdk-win32-2.0-0.dll, libglib-2.0-0.dll,
libgmodule-2.0-0.dll, libgobject-2.0-0.dll,
libgthread-2.0-0.dll, libgtk-win32-2.0-0.dll,
libpango-1.0-0.dll, libpangowin32-1.0-0.dll,
libxml2, libglade-2.0-0, zlib1]
}
}
setup(
name = PyGTKTest,
description = PyGTK Test Application,
version = 0.1,
windows = [{script: test.py, icon_resources: [(1,
test.ico)]}],
options=opts,
data_files=[(, [test.glade])]
)
...
Py2exe reports an error if I try to use --force (the command doesn't
exist), so I use only:
python setup.py py2exe --exclude
gobject,glib,gtk,glade,pango,atk,libglade,xml2,zlib
After that I make a new directory, say MyApp, copy the entire content
of
the GTK folder (I'm using the GTK Runtime Enviroment from
gladewin32.sourceforge.net) in MyApp, and then copy the content of the
dist folder into MyApp\bin.
Now I can uninstall GTK Runtime Enviroment, and Python, and it works
:).
But it's pretty big, what files can I remove? (OK, I know... locales,
man
pages, examples :), but what more - it's still 20 MB?)
--
http://mail.python.org/mailman/listinfo/python-list
Python 2.4 | 7.3 The for statement
Hi My name is Juan Carlos Rodrigo, and I love Python. It is the most impressive and usefull language that I have ever seen. I am studing, at http://www.uoc.edu, an Information Technology Postgraduate. And I have programmed some REXX applications in my past Jobs (So I love python, no more ENDS). ** Reposting from Python-Dev with some more comments. 888888 Python 2.4 | 7.3 The for statement: --- for_stmt ::= for target_list in expression_list : suite [else : suite] New for statement: -- for_stmt ::= for target_list in expression_list [ and expression ] : suite [else : suite] ** If the expression evaluates to False before entering the for, jump else. ** If the expression is evaluated to False after the first iteration, break. So ¿What we can do with this new for?, and ¿It is going to avoid line exceed?: My second remark is that our intellectual powers are rather geared to master static relations and that our powers to visualize processes evolving in time are relatively poorly developed. [1] It is easier if we see it beforehand: - leave = False alist = [1,2,3,3,4,5,6,7,8,9] for item in alist and not leave: if item is 1: leave = True Avoiding code exceed: - a = 1 b = 2 c = 3 alist = [1,2,3,4,5,6,7,8,9] for item in alist and a 2 and b 3 and c 4: if item == 3: a += 1 if item == 2: b += 1 if item == 1: c += 1 print %d %d %d % (a,b,c) # three lines off (25% less on breaks) Other features and the else: alist = [1,2,3] enter = False if list[0] == 4: enter = True for item in alist and enter: print item else: print No account The real problem: - The exercise to translate an arbitrary flow diagram more or less mechanically into a jump-less one, however, is not to be recommended. [1] Ok, it's not recommended, at large, but Python should make it possible, and then the people will choose. [1] Go To Statement Considered Harmful Edsger W. Dijkstra http://www.acm.org/classics/oct95/ PD: Your work is impressive, thanks. 888888 +++ Andrew Koenig wrote: for_stmt ::= for target_list in expression_list [ and expression ] : suite [else : suite] It can't work. The expression_list could be just a variable, as could the expression, in which case you get for target_list in variable and variable : Considering that your for definition is not correct. and, of course variable and variable is already an expression. So it's ambiguous. No my definition has no ambiguity in it and your idea does not work as you think, because is not an expression as you incorrectly wrote out, is an expression_list: leave = True l = [1,2,3,4] form item in l and leave: File stdin, line 1 form item in l and leave: And your example what really does is iterating over the expression_list (BTW: and cannot be used as you point out): leave = True l = [1,2,3,4] for item in l, leave: ... print item ... [1, 2, 3, 4] True +++ Nick Coghlan wrote: Interesting idea, but not really needed given the existence of the break statement: for item in alist: if item is 1: break Well Nick the point here is to have the possibility to leave for loops without using the break statement, and of course use breaks too. +++ Nick Coghlan wrote: All non-sequential control structures are merely constrained ways of using goto (the underlying machine code will devolve into conditional and unconditional branches and jumps - i.e. goto's). No doubt Nick, but were are programming on a very, very high level language. 'break' is a highly constrained form of goto and a fundamental part of structured programming (as is 'continue') Well you are expressing it better than I am. I used to share your sentiment regarding break and continue - experience (especially Python experience) has convinced me otherwise. Python embraces the concept of breaking out of a loop to the point that it even has an 'else' clause on loop structures that is executed only if the loop is exited naturally rather than via a break statement. And It will be better with by for breaking possibilities. Regardless of whether you personally choose to use break and continue, the existence of those statements is the main reason that the addition of a flag condition to for loops is highly unlikely. ¿Why is that C has both break, continue and in for breaking capabilities? Thanks for your comments. -- http://mail.python.org/mailman/listinfo/python-list
