Front Range Pythoneers Monthly Meeting: Wed, Mar 21, in Boulder, Colorad
== Meeting: Wednesday, March 21, 2007 == * Time: 6-8 PM * Location: bivio Software, Inc., 28th and Iris, Boulder, CO. Above Hair Elite in Suite S. There is abundant parking. This Wednesday (March 21) we have a great lineup of PyCon 2007 talks from local presenters: * Matt Boersma will present Write Less Code with XRC for wxPython: an easier way to do GUI layout using wxWidget's XML-based resource system. * Sean Reifschneider will present Python and vim: Two great tastes that go great together. The vim editor includes extensive abilities for customization and scripting. In addition to its own simple macro language, vim also supports calling Python code. This Python code has access back into vim for manipulating the edit buffer as well as running normal vim commands. Examples demonstrated in this talk will include automatically detecting indentation style (tabs/N spaces), automatic update of DNS serial numbers when editing DNS zone files, mail alias tab-expansion, and a time tracking application using a domain specific vim as the user interface. Other items to talk about: * BoulderSprint. The next sprint will be April 28 on the IPython1 Beta. This would be an excellent opportunity to learn about decorators, Twisted, and other advanced Python concepts while helping getting this amazing shell to beta status. * Google Summer of Code. The Python Software Foundation's application to join GSoC was just approved. It's not too late to be a mentor. But the student application deadline is March 24! We will have food drink available as usual. Hope to see you there! More info: http://wiki.python.org/moin/FrontRangePythoneers -- http://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations.html
First version of qooxdoo json-rpc module has been released
First release of JSON-RPC module for qooxdoo has been released.
qxjsonrpc is a new JSON-RPC backend for the qooxdoo JavaScript UI framework
( http://www.qooxdoo.org ). This module can be used to build server side
backends in python with very little effort.
Features:
- HTTP transport (GET and POST, including ScriptTransport)
- Build-in qooxdoo test server implementation for RPC_* tests
- Very fast JSON serialization through python-cjson-1.0.3x
Download and more information:
http://cx.hu/qxjsonrpc/
Simply running the module provides a qooxdoo test backend at: 127.0.0.1:8000
Example:
import qxjsonrpc
class MyService(object):
def getPi(self, *args):
print 'Called: getPi%r'%(args,)
return 3.14159265365
server=qxjsonrpc.HTTPServer()
server.setService('myservice', MyService())
server.serve_forever()
NOTE: qxjsonrpc uses an enhanced version of the very fast
python-cjson 1.0.3 JSON library called python-cjson-1.0.3x.
You must install python-cjson-1.0.3x before using qxjsonrpc.
You can download it from: http://cx.hu/python-cjson
NOTE: I haven't tested this backend with real qooxdoo components,
so it may not work properly in such situations. Please drop me a mail
about your success or failure. Thanx.
You can send bug reports to: [EMAIL PROTECTED]
(This is only a temporary solution for bug reporting, of course.)
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Enhanced python-cjson 1.0.3 version: 1.0.3x
Enhanced version of python-cjson 1.0.3 has been released.
It's numbered 1.0.3x, where x stands for eXtension.
The main improvement is the ability to extend the JSON encoder and decoder
with extensions functions to serialize/unserialize objects not in the
original JSON specification. This is achieved without sacrificing the speed
and stability of the original implementation. Please send bug reports to
[EMAIL PROTECTED] and do not contact the original author (Dan Pascu) about this
version.
Download and more information:
http://cx.hu/python-cjson/
Example to encode/decode python date and datetime objects as JavaScript Date
objects:
import re
import cjson
import datetime
# Encoding Date objects:
def dateEncoder(d):
assert isinstance(d, datetime.date)
return 'new Date(Date.UTC(%d,%d,%d))'%(d.year, d.month, d.day)
json=cjson.encode([1,datetime.date(2007,1,2),2], extension=dateEncoder)
assert json=='[1, new Date(Date.UTC(2007,1,2)), 2]'
# Decoding Date objects:
re_date=re.compile('^new\sDate\(Date\.UTC\(.*?\)\)')
def dateDecoder(json,idx):
json=json[idx:]
m=re_date.match(json)
if not m: raise 'cannot parse JSON string as Date object: %s'%json[idx:]
args=cjson.decode('[%s]'%json[18:m.end()-2])
dt=datetime.date(*args)
return (dt,m.end()) # must return (object, character_count) tuple
data=cjson.decode('[1, new Date(Date.UTC(2007,1,2)), 2]',
extension=dateDecoder)
assert data==[1,datetime.date(2007,1,2),2]
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[ANN] GCC 4.1.2 installer for Python distutils compilation
Hello, This page: http://www.develer.com/oss/GccWinBinaries contains a friendly Windows installer for GCC 4.1.2 (MinGW binary version), with full support for integrating it with Python installations so that it is used by distutils to compile Python extensions. Direct download link: http://www.develer.com/~rasky/gcc-4.1.2-mingw-setup.exe Who needs this package? * People who wants to use FLOSS tools to develop Python extensions. * People who wants to use the recent GCC 4.1.2 to develop Python extensions, given that it easily outperforms the 4-years-old Visual Studio .NET 2003. What's special about this? * mingw.org still has GCC 3.4.2, so go figure. Also, you need to compose other packages together. This is a single installer with everything inside. * By default, MinGW GCC links with MSVCRT.DLL, and not MSVCR71.DLL (used by Python 2.4 and 2.5). Fixing this is pretty complicate, and there's much confusion (Google turns up red herrings). This package handles everything for you, and it just works. -- Giovanni Bajo Develer S.r.l. http://www.develer.com -- http://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations.html
Generating HTML containing XML in an INPUT tag
Hi there, Using Python, I'm auto-generating an HTML file that contains: input type=hidden value=XXX /, where XXX is XML data (encoded somehow). Articles regarding unicode are making my head spin! Is there a way to encode XML file contents to a hexadecimal string that could be decoded on a PHP server? I have an XML file that is generated based on user entries (GUI from PythonCard). After the XML file is created, I want the user to see an HTML preview, and then click an Upload button on the page. Hidden in the page is the tag I showed above. I decided not to generate input type=file / because from a usability standpoint, I want the user to create this file and upload it to my PHP server in as few steps as possible. Also, I tried setting the value to the XML file path...my browser security settings don't like it and I'm sure other browsers won't like it either. Any ideas? -- http://mail.python.org/mailman/listinfo/python-list
Re: Mastering Python
Alex Martelli wrote: Dennis Lee Bieber [EMAIL PROTECTED] wrote: need to catch up quickly and master Python programming.How do you Mastery and quickly are opposing terms G Took me 15 years on a job using FORTRAN 77 and I still wouldn't have called myself a master. (I'm more of a JoAT) My favorite Stars! PRT, mind you -- but when some language interests me enough, I do tend to master it... guess it's correlated with what Brooks saw as the ideal language lawyer in his surgical team approach, an intrinsic fascination with bunches of interconnected rules. Python just isn't that complicated. The syntax is straightforward, and the semantics are similar to most other dynamic object-oriented languages. If you know Perl or Smalltalk or LISP or JavaScript, Python does about what you'd expect. Execution model: dynamic stack-type interpreter. Memory model: reference counting with backup garbage collector. Syntax: roughly C-like, with indentation for structure. Typing model: dynamic only Object model: class definitions with multiple inheritance. Object structure: dictionary hash. Exception model: explicit throw/try/catch Theading model: multiprogramming in interpreter. Safe memory model: Yes. Closures: Yes. Design by contract: No. That's Python. Biggest headache is finding out what doesn't work in the libraries. John Nagle -- http://mail.python.org/mailman/listinfo/python-list
Re: Mastering Python
John Nagle [EMAIL PROTECTED] writes: Execution model: dynamic stack-type interpreter. Erm, the iterator protocol makes the above a little more complicated. Biggest headache is finding out what doesn't work in the libraries. Good observation. -- http://mail.python.org/mailman/listinfo/python-list
Re: Weekly Python Patch/Bug Summary
May I ask a dumb question here? It isn't clear to me what to do with these patches. For most of them there is something like, Committed as r54386 and r54387. I'm familiar with updating the editor Ulipad to the latest revision, using software such as TortoiseSVN and RapidSVN. Is that what is meant? And if so, what's the URL of the trunk? Thanks, Dick Moores -- http://mail.python.org/mailman/listinfo/python-list
Re: Weekly Python Patch/Bug Summary
Dick Moores [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] | May I ask a dumb question here? It isn't clear to me what to do with these patches. For most of them there is something like, Committed as r54386 and r54387. I'm familiar with updating the editor Ulipad to the latest revision, using software such as TortoiseSVN and RapidSVN. Is that what is meant? And if so, what's the URL of the trunk? - Yes, those are svn revision numbers. Start at svn.python.org. Most people ignore the patches. Some look at them to know what to expect in the next releases. A few download to a local svn repository either to work on the code or build a bleeding edge python to test with their code. Good luck. tjr -- http://mail.python.org/mailman/listinfo/python-list
Re: distributing python software in jar like fashion
In article [EMAIL PROTECTED], John Nagle [EMAIL PROTECTED] wrote: Were Python eggs a flop, or what? We need to have one packager that everyone agrees on. Otherwise, installs become a mess, and then you have to have installers that handle multiple packagers. I think the point about Squisher is that you don't have to install it. You can either import it or run it directly. I'm mostly interested in it as a way to package a script with a few Python and C modules, dump it in the field, and run python myscript.pyc to execute it, with no need for anything but the base Python to be installed on the remote site, and just one file to copy. Gary Duzan Motorola CHS -- http://mail.python.org/mailman/listinfo/python-list
Re: Odd error
On Mar 17, 4:34 pm, [EMAIL PROTECTED]
[EMAIL PROTECTED] wrote:
I'm trying to use a script that I originally wrote on a Mac Classic
machine and have moved to a Windows XP machine.
I can open the script and edit the thing, but when I try to run it in
I get:
Exception in Tkinter callback
Traceback (most recent call last):
File C:\Python25\lib\lib-tk\Tkinter.py, line 1403, in __call__
return self.func(*args)
File C:\Python25\lib\idlelib\MultiCall.py, line 151, in handler
r = l[i](event)
File C:\Python25\lib\idlelib\ScriptBinding.py, line 151, in
run_module_event
dirname = os.path.dirname(filename)
File C:\Python25\lib\ntpath.py, line 207, in dirname
return split(p)[0]
File C:\Python25\lib\ntpath.py, line 172, in split
while head2 and head2[-1] in '/\\':
TypeError: 'int' object is not iterable
I've converted the text to windows format, and the other scripts that
I transferred at the same time work.
What's going on here?
The following demonstrate the correct behaviour of ntpath.split():
Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit
(Intel)] on win32
Type help, copyright, credits or license for more information.
import ntpath
ntpath.split('foo')
('foo', '')
ntpath.split('foobar')
('foobar', '')
ntpath.split('foobar')
('foo', 'bar')
ntpath.split('foo\\bar')
('foo', 'bar')
ntpath.split('bar')
('', 'bar')
I can't see how this error could arise from the line:
while head2 and head2[-1] in '/\\':
The only possible iterable is the constant '/\\' ...
You may have a corrupt Python 2.5 installation; try the above tests;
if one fails, delete any ntpath.pyc and/or ntpath.pyo and try again.
I'm suspicious of the 'lib' directory name; standard Python
installations on Windows call the directory 'Lib' AFAIK; how did you
install Python?
HTH,
John
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Re:
Milton,
This isn't terribly elegant, but it gets the job done:
dirs = ['C:\Images', 'C:\Images\2006', 'C:\Images\2007', 'C:\Music',
'C:\Files', 'C:\Software', 'C:\Software\Python', 'C:\Software\iTunes']
exclude_list =
['Software','Images']
def foo(d):
retval = d
for item in exclude_list:
if item in d:
retval = False
return retval
dirs = map(foo, dirs)
dirs = filter(bool, dirs) # removes the Falses
print dirs
Milton Segura wrote:
Hello, I'm trying to exclude files from a list using the following code:
for item in dirs:
if item.find('Software') -1:
dirs.remove(item)
elif item.find('Images') -1:
dirs.remove(item)
let's supose dirs = ['C:\Images', 'C:\Images\2006', 'C:\Images\2007',
'C:\Music', 'C:\Files', 'C:\Software', 'C:\Software\Python',
'C:\Software\iTunes']
For some reason.. it just won't exclude them.
I'd like to know why and how to fix it.
Thanks in advance.
Milton
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National Council on Economic Education
[EMAIL PROTECTED] | 402-438-8958 | http://www.ncee.net
Leading the Campaign for Economic and Financial Literacy
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Re: (unknown)
En Sat, 17 Mar 2007 03:54:22 -0300, Milton Segura [EMAIL PROTECTED]
escribió:
Hello, I'm trying to exclude files from a list using the following code:
for item in dirs:if item.find('Software') -1:
dirs.remove(item)elif item.find('Images') -1:
dirs.remove(item)
For some reason.. it just won't exclude them.
I'd like to know why and how to fix it.
Don't iterate over the list and alter it at the same time; the iterator
gets confused.
Iterate over a copy:
for item in dirs[:]:
if item.find(...)
or backwards:
for item in reversed(dirs):
if item.find(...)
--
Gabriel Genellina
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Re: TypeError: 'module' object is not callable
En Fri, 16 Mar 2007 14:42:49 -0300, [EMAIL PROTECTED] escribió:
and i tried to call profile('t.printworld()')
but i received the following error:
Traceback (most recent call last):
File stdin, line 1, in ?
TypeError: 'module' object is not callable
It's always better to post the *whole* code.
I assume you wrote:
import profile
profile('...')
But profile is the module name; you want to call the `run` function inside
the profile module instead:
import profile
profile.run('t.printworld()')
Look at the docs for the profile module at
http://docs.python.org/lib/lib.html or typing help(profile) at the
interpreter prompt.
--
Gabriel Genellina
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Re: import error
En Fri, 16 Mar 2007 23:49:43 -0300, Nick Burns [EMAIL PROTECTED] escribió: Quick question. I am running python on windows xp. i want to import my own module mymod. However, when I try to import it i get the error message ImportError: no module named mymod. mymod is located in a directory that is part of the computer's path env variable. Imports fine if 'mymod' is in the current working directory, but not otherwise. i had thought that by saving 'mymod'within my normal path that it would import successfully, but this is not the case. Python does not use the system PATH environment variable. Doing this: import sys print sys.path you will see the list of directories that Python would try. Try saving your module inside site-packages. -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list
Re: Finding the insertion point in a list
7stud schrieb How about: --- x = [0, 100, 200, 1000] y = -1 inserted = False for i in range(len(x)): if(y = x[i]): x.insert(i, y) inserted = True break if(not inserted): x.append(y) print x You can get rid of the sentinel inserted using the else clause of the for loop: for i in range(len(x)): if (y = x[i]): x.insert(i, y) break else: x.append(y) Python is cool :-) IMHO. HTH. Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: lock problem
En Fri, 16 Mar 2007 04:40:27 -0300, Ritesh Raj Sarraf [EMAIL PROTECTED] escribió: Leo Kislov wrote: You're changing environmental variable __kabc_ldap that is shared between your threads. Environment is not designed for that kind of usage, it was designed for settings. Either use an option to set output file or just redirect stdout. If the interface of ldapsearch is so lame that it requires environmental variable use env to set the variable: env __kabc_ldap=/tmp/wrjhdsf ldapsearch ... The environment variable is set with temp_file_name which gets the name from tempfile.mkstemp(), which is run in every thread. So I don't think the environment variable is going to be the same. But the environment is global for all threads. I don't know how ldapsearch works, but can't you pass it an additional argument, instead of setting an environment variable? From the long commandline you're building, I bet it has a suitable option. Or, instead of os.system, use subprocess.Popen, wich lets you specify the new environment of the child process. -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list
Re: File extension
En Fri, 16 Mar 2007 19:59:09 -0300, Anil Kumar [EMAIL PROTECTED] escribió: But when I try a python script with extension .sh in windows, the file is not getting recognized by the Python interpreter. Is this supported? Or is there any way we can achieve the same? C:\TEMPtype test.sh print Hello! C:\TEMPpython test.sh Hello! For a *script* that you run explicitely, Python doesn't care of the extension. But a *module* (used with the import statement) must be a .py/.pyc/.pyo Also, if you run the script with: python scriptname.sh, it's ok; but if you run it just using: scriptname.sh, won't work; Windows uses the file extension to determine the program to run, instead of the !# line. The reason I am trying to change the extension is, it reduces lot of porting changes. No need to go to each of our file which were referencing .sh file before and change it to .py. I assume you're not using Cygwin - you can create a stub version of each script, so that foo.sh contains: python foo.py, and associate .sh extension with cmd.exe -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list
Re: Weekly Python Patch/Bug Summary
At 01:32 AM 3/17/2007, Terry Reedy wrote: Dick Moores [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] | May I ask a dumb question here? It isn't clear to me what to do with these patches. For most of them there is something like, Committed as r54386 and r54387. I'm familiar with updating the editor Ulipad to the latest revision, using software such as TortoiseSVN and RapidSVN. Is that what is meant? And if so, what's the URL of the trunk? - Yes, those are svn revision numbers. Start at svn.python.org. I thought I'd give http://svn.python.org/projects/python/branches/release25-maint/ (the latest release (plus bug fixes) of Python) a try. I first backed up my Python25 folder (I'm using Win XP). Then with Python 25 open I opened the Explorer context menu for the folder and then the TortoiseSVN sub-menu. There doesn't seem to have a menu item that will enable me to update. I tried Export... and entered http://svn.python.org/projects/python/branches/release25-maint/ as URL of repository, but that choice seems to expect the Python25 folder to be empty. Can you tell me what to do to just update? Dick -- http://mail.python.org/mailman/listinfo/python-list
ECCOMAS VipIMAGE 2007 - Abstracts Submission Period Extended in TWO WEEKS
International ECCOMAS Thematic Conference VipIMAGE 2007 - I ECCOMAS THEMATIC CONFERENCE ON COMPUTATIONAL VISION AND MEDICAL IMAGE PROCESSING 17-19th October 2007, FEUP, Porto, Portugal http://www.fe.up.pt/VIPIMAGE We would appreciate if you could distribute this information by your colleagues and co-workers. Dear Colleague, The Organizing Committee of VipMAGE has decided to extend the submission period in two weeks (March 31, 2007). More details regarding VipIMAGE can be found in the conference website: http://www.fe.up.pt/VIPIMAGE We are looking forward to see you in Porto next October. Important dates Submission of extended abstracts: March 31, 2007; Authors Notification: April 15, 2007; Lectures and Final Papers: May 15, 2007; Early registration fee: May 31, 2007. Invited Lectures - Automatic Generation of Computer Models from Multi-modal Bio- medical Imaging - Chandrajit Bajaj, USA - Computational Bioimaging and Visualization - Chris Johnson, USA - From Geometrical Models to Physiological Models of the Human Body - Hervé Delingette, France - Latest advances in Cardiovascular Informatics - Ioannis A. Kakadiaris, USA - Robust Algorithms for Deformable Contours - Jorge S. Marques, Portugal - Image Sequence Evaluation - Juan J. Villanueva, Spain - Fast Surface Segmentation and remeshing by finding geodesics - Laurent Cohen, France - Processing of Simultaneous acquisition of EEG and fMRI - Mario Forjaz Secca, Portugal - Automatic Construction of Statistical Shape Models using Non-Rigid Registration - Tim Cootes, UK - Theory of Digital Manifolds and its Applications to Medical Imaging - Valentin Brimkov, USA Reinhard Klette, NZ Kind regards, João Manuel R. S. Tavares Renato Natal Jorge (conference co-chairs) -- http://mail.python.org/mailman/listinfo/python-list
Re: urlopen not thread safe
En Thu, 15 Mar 2007 21:12:46 -0300, John Nagle [EMAIL PROTECTED] escribió: I was looking at the code for urllib, and there's some undocumented FTP cacheing code in there that's not thread safe. The documentation for urllib Is there any good reason to keep that code in urllib? Unless something critical uses that undocumented feature, that code probably ought to come out. Comments? Maybe the default should be None, like tempcache; anyone interested could assign to the ftpcache instance attribute. -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list
Re: Finding the insertion point in a list
On Mar 17, 5:42 pm, Paul Rubin http://[EMAIL PROTECTED] wrote: Steven D'Aprano [EMAIL PROTECTED] writes: or even len(filter(lambda t, y=y: yt, x)) How about min(i for i,t in enumerate(x) if t = y) or max(i for i,t in enumerate(x) if t = y) Those are actually pretty direct. I'd hate to see indirect. Worse, the min-using gizmoid crashes when y x[-1] -- all your ifs are belong to False. x [0, 100, 200, 1000] tests = [0, 1, 100, 150, 1000, 2000] [(y, max(i for i,t in enumerate(x) if t = y)) for y in tests] [(0, 0), (1, 0), (100, 1), (150, 1), (1000, 3), (2000, 3)] Looks OK, iff one is happy with the OP's strange usage of insert point. xc = x[:] xc.insert(1, 150) xc [0, 150, 100, 200, 1000] Whoops. Try this for size: [(y, sum(t = y for t in x)) for y in tests] [(0, 1), (1, 1), (100, 2), (150, 2), (1000, 4), (2000, 4)] Cheers, John -- http://mail.python.org/mailman/listinfo/python-list
Re: Returning other instance from __init__ - I need help
En Fri, 16 Mar 2007 22:05:05 -0300, Paulo da Silva [EMAIL PROTECTED] escribió: When debugging, I found this is wrong!!! Would someone please clarify what do I have to return from __new__? Try this. I used a classmethod for load, it may be easier to subclass. class C(object): def __new__(cls, filename=None, foo=None, bar=None): if filename is not None: return cls.load(filename) inst = super(C, cls).__new__(cls) inst.foo = foo inst.bar = bar return inst @classmethod def load(cls, filename): inst = super(C, cls).__new__(cls) inst.foo = some foo loaded from +filename inst.bar = some bar loaded from +filename return inst class D(C): @classmethod def load(cls, filename): inst = super(D, cls).__new__(cls) inst.foo = D foo loaded from +filename inst.bar = D bar loaded from +filename return inst c1 = C(foo=1, bar=2) print c1=, c1 print c1.foo=, c1.foo print c1.bar=, c1.bar c2 = C(filename=xxx.txt) print c2=, c2 print c2.foo=, c2.foo print c2.bar=, c2.bar d1 = D(foo=10, bar=20) print d1=, d1 print d1.foo=, d1.foo print d1.bar=, d1.bar d2 = D(filename=yyy.txt) print d2=, d2 print d2.foo=, d2.foo print d2.bar=, d2.bar -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list
Re: File extension
Anil Kumar wrote: Hi, Can Python Script can have different extensions like .sh etc Or Is .py is mandatory to be present as the extension for the Python Script. The interpreter itself doesn't really care. The issues you are hotting are due to operating system. and command shell differences. We have an application where the script was initially written in shell script with extension .sh. Now we are migrating this script to be run in both Unix and Windows, so using Python for migration. Good for you! I have created a new Python Script porting all the changes in shell script and it is working fine in Unix/Linux operating system. Later I changed the extension of the file from .py to .sh, even then it worked. The Unix command interpretation mechanism uses PATH as a list of directories to search for the named command file (the first word of the expanded command line). It then looks for the magic string #! at the start of the executable file and, if it finds that string, it passes the file to the interpreter named in the rest of the line for execution as a program. Your Python files probably begin with something like #!/usr/bin/python or #!/usr/bin/env python But when I try a python script with extension .sh in windows, the file is not getting recognized by the Python interpreter. Is this supported? Or is there any way we can achieve the same? In Windows, alas, the mechanism is less versatile. The command interpreter uses an environment variable called PATHEXT to decide which extensions to check when it sees a command that it can't find directly. For example, my PATHEXT variable is currently PATHEXT=.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH (you'll observe I have given up on the PATHEXT mechanism - it's too much of a pain in the butt for me, so I just code explicit calls to the python interpreter). It looks on the PATH for a file with the given name and each extension, and when it finds one it then runs the interpreter registered for that type of file. The reason I am trying to change the extension is, it reduces lot of porting changes. No need to go to each of our file which were referencing .sh file before and change it to .py. Any Help would be greatly Appreciated. You could cheat ... if you register the .SH extension as to be handled by the python interpreter and then add .SH to PATHEXT this should work under Windows. regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC/Ltd http://www.holdenweb.com Skype: holdenweb http://del.icio.us/steve.holden Blog of Note: http://holdenweb.blogspot.com See you at PyCon? http://us.pycon.org/TX2007 -- http://mail.python.org/mailman/listinfo/python-list
Re: Finding the insertion point in a list
Paul Rubin wrote: Steven D'Aprano [EMAIL PROTECTED] writes: or even len(filter(lambda t, y=y: yt, x)) How about min(i for i,t in enumerate(x) if t = y) or max(i for i,t in enumerate(x) if t = y) Those are actually pretty direct. How about a solution (like the bisect one suggested almost as soon as this thread started) that doesn't iterate over the whole list. Having said which, for the promoted use cases I agree that the append() and sort() paradigm wins hands down until it starts to make a real and observable difference to the run time. regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC/Ltd http://www.holdenweb.com Skype: holdenweb http://del.icio.us/steve.holden Recent Ramblings http://holdenweb.blogspot.com -- http://mail.python.org/mailman/listinfo/python-list
Re: import error
Gabriel Genellina wrote: En Fri, 16 Mar 2007 23:49:43 -0300, Nick Burns [EMAIL PROTECTED] escribió: Quick question. I am running python on windows xp. i want to import my own module mymod. However, when I try to import it i get the error message ImportError: no module named mymod. mymod is located in a directory that is part of the computer's path env variable. Imports fine if 'mymod' is in the current working directory, but not otherwise. i had thought that by saving 'mymod'within my normal path that it would import successfully, but this is not the case. Python does not use the system PATH environment variable. Doing this: import sys print sys.path you will see the list of directories that Python would try. Try saving your module inside site-packages. Or investigate appropriate settings of the PYTHONPATH environment variable, whose elements will be added to sys.path at interpreter startup. The path environment variable is for locating executables, not Python libraries. regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC/Ltd http://www.holdenweb.com Skype: holdenweb http://del.icio.us/steve.holden Recent Ramblings http://holdenweb.blogspot.com -- http://mail.python.org/mailman/listinfo/python-list
cannot start IDLE in WinXP
Hi, Enviroment: WinXP sp2, python 2.5 problem: click IDLE using shorcut menu or run phthonw.exe directly, nothing happen! But running python.exe from the command line is fine. I searched this issue on the net and this forum and tried some suggestions but with no luck. Any ideas? Thanks in advance, Xiong -- http://mail.python.org/mailman/listinfo/python-list
[Announce] Scribes 0.3.1 Released
Scribes is python editor for *nix and GNOME that balances simplicity with power. This release features extensibility via Python plugins, auto-completion enhances, snippets improvement, automatic replacement and correction, a new minimalist interface, performance optimizations and more... release note: http://scribes.sourceforge.net/release-note-0-3-1.html Flash Demo: http://scribes.sf.net/demo.htm GIF Demo: http://www.minds.may.ie/~dez/images/blog/scribes.html download: http://scribes.sf.net/download.html templates: http://scribes.sf.net/templates.tar.bz2 website: http://scribes.sf.net/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Finding the insertion point in a list
On Mar 17, 9:46 pm, Steve Holden [EMAIL PROTECTED] wrote: Paul Rubin wrote: Steven D'Aprano [EMAIL PROTECTED] writes: or even len(filter(lambda t, y=y: yt, x)) How about min(i for i,t in enumerate(x) if t = y) or max(i for i,t in enumerate(x) if t = y) Those are actually pretty direct. How about a solution (like the bisect one suggested almost as soon as this thread started) that doesn't iterate over the whole list. Having said which, for the promoted use cases I agree that the append() and sort() paradigm wins hands down until it starts to make a real and observable difference to the run time. Unfortunately for sort/append, the OP wants to find the insertion point -- he hasn't mentioned actually doing the insertion. -- http://mail.python.org/mailman/listinfo/python-list
Re: lock problem
Leo Kislov wrote: But you miss the fact that there is only one environment per process. Oh!! I think I get your point. There'd be only one __kabc_ldap environment variable to which all the threads would be overwriting. Hmmm!! Yes, you're correct. Thanks for pointing it out. Ritesh -- Ritesh Raj Sarraf RESEARCHUT - http://www.researchut.com Necessity is the mother of invention. Stealing logic from one person is plagiarism, stealing from many is research. The great are those who achieve the impossible, the petty are those who cannot - rrs -- http://mail.python.org/mailman/listinfo/python-list
Re: lock problem
Leo Kislov wrote: But you miss the fact that there is only one environment per process. Maybe there's a confusion. The environment variable that I'm setting has noting to do with ldapsearch. I use the environment variable as a filename to which ldapsearch can redirect its output. And that I do is because the output can be huge and useless. Then I do some pattern matching on that file and filter my data and then delete it. If you think I still am missing something important, request you to describe it. Thanks, Ritesh -- Ritesh Raj Sarraf RESEARCHUT - http://www.researchut.com Necessity is the mother of invention. Stealing logic from one person is plagiarism, stealing from many is research. The great are those who achieve the impossible, the petty are those who cannot - rrs -- http://mail.python.org/mailman/listinfo/python-list
Re: Writing python module in C: wchar_t or Py_UNICODE?
Carsten Haese wrote: You should familiarize yourself with the Python/C API documentation. It contains the answers to all the above questions. http://docs.python.org/api/arg-parsing.html says this about the u format character: a pointer to the existing Unicode data is stored into the Py_UNICODE pointer variable whose address you pass. http://docs.python.org/api/unicodeObjects.html says this about Py_UNICODE: On platforms where wchar_t is available and compatible with the chosen Python Unicode build variant, Py_UNICODE is a typedef alias for wchar_t to enhance native platform compatibility. The first quote says that, to be strictly correct, login should be a Py_UNICODE*, but the second quote says that under the right circumstances, Py_UNICODE is the same as wchar_t. It's up to you to determine if your platform provides the right circumstances for this to be the case. Hope this helps, Carsten. Thanks for reply, sorry for asking questions while not checked the manual. Also sorry for my wierd english :) -- http://mail.python.org/mailman/listinfo/python-list
Re: SQLite3, data not found
On Friday 16 March 2007 18:23, Jerry Hill wrote:
On 3/16/07, jim-on-linux [EMAIL PROTECTED]
wrote:
Below, the first select produces results but,
after closing then re-opening the database
the select produces an empty list. Anyone
know the reason ??
When you first open a connection, you
implicitly begin a transaction. You need to
call con.commit() before you close the
connection, or your transaction will be rolled
back when you close() it. If don't want to
bother with transaction handling, you can turn
it off when you open the connection, like this:
con = sqlite3.connect('myData',
isolation_level=None)
See the Python Database API 2.0 PEP for more
details about the behavior required of DB-API
2.0 compliant interfaces:
http://www.python.org/dev/peps/pep-0249/
--
Jerry
Thanks, this saves a lot of con.commit action.
And the website is valuable.
jim-on-linux
--
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Re: Mastering Python
John Nagle [EMAIL PROTECTED] wrote: ... Mastery and quickly are opposing terms G Took me 15 years on a job using FORTRAN 77 and I still wouldn't have called myself a master. (I'm ... Python just isn't that complicated. The syntax is straightforward, Neither is/was Fortran 77, net perhaps of a few syntax quirks that were easily avoided; yet few practitioners took the trouble (for example) of learning what manners of data aliasing (e.g. between routine parameters and/or data in COMMON blocks) were legal and which were not -- such a simple rule (if you write data through an alias and read or write the same memory through a different alias, you're breaking the rules of the language and the compiler's free to make dragons fly out of your nose), yet I've lost count of the number of times I've seen it broken during my Fortran days (broken by professional programmers who used Fortran to make a living and yet didn't care enough to know better, mind you -- I'm not talking about accidental mistakes, which of course can easily happen for a rule that the compiler need not enforce, but total ignorance of this simple rule). Alex -- http://mail.python.org/mailman/listinfo/python-list
tkinter grid vs pack
For what is grid better than pack, and otherwise? thanks in advance -- http://mail.python.org/mailman/listinfo/python-list
Re: a better solution for GUI in python
ce wrote: Hi, My company is using python currently for our website. We need to develop a GUI front-end for our ERP that would be portable (Windows and Linux). My question is which solution would be better for the GUI (and easier to implement)? I knew there are something like wxidgets, QT and pyGTK? actually we will need some complicated stuff in the GUI and yet I don't know much about GUI programming. Any recommendation guys? Hallo. Hava a look at http://www.awaretek.com/toolkits.html . Regards, Rainer -- http://mail.python.org/mailman/listinfo/python-list
Private data
http://dustangroups.googlepages.com/privateattributesinpython This is something that I just threw together this morning, after a eureka moment. It's a way of creating private class attributes and static function variables (I'm not 100% sure if that's the correct terminology, but you get what I mean). I haven't tried to create private instance attributes, mainly because it would just be too difficult, and it would be awful syntax. I'm not considering actually using this, but I do have a couple questions about it. 1. Has anyone else ever come up with something like this? I can't imagine I'm the only person who's ever thought of this. 2. Is it possible to hack into something like this? ie, would it be possible to see and change these variables from client code (assuming the data manager has been properly removed from sight, as shown on the last line of class block TestPrivateClassAttributes)? To avoid utter confusion, you may want to look at TestPrivateClassAttributes before looking at the actual implementation of PrivateDataEngine. If you're still confused, feel free to ask what's going on here (and I'm open to suggestions on how to make it clearer). -- http://mail.python.org/mailman/listinfo/python-list
Re: Finding the insertion point in a list
On Mar 17, 4:12 am, Martin Blume [EMAIL PROTECTED] wrote: 7stud schrieb How about: --- x = [0, 100, 200, 1000] y = -1 inserted = False for i in range(len(x)): if(y = x[i]): x.insert(i, y) inserted = True break if(not inserted): x.append(y) print x You can get rid of the sentinel inserted using the else clause of the for loop: for i in range(len(x)): if (y = x[i]): x.insert(i, y) break else: x.append(y) Python is cool :-) IMHO. HTH. Martin for-else? Neat. -- http://mail.python.org/mailman/listinfo/python-list
Re: Python shell on mac os x
7stud wrote: On Mar 16, 2:53 am, [EMAIL PROTECTED] wrote: or go tohttp://pythonmac.org/packages/ and you have python 2.5 or python 2.4.4 with readline support The download instructions seem to steer Mac users to version 2.4.4 because it has more modules available. What is the consensus on that? If you just want binary packages installed, it might make sense to use 2.4.4, but building new packages with 2.5 is easy: either use easy_install or sudo python setup.py. I've had no trouble building the stuff I need with 2.5. -- Kevin Walzer Code by Kevin http://www.codebykevin.com -- http://mail.python.org/mailman/listinfo/python-list
read a web page using python
Hi All, Kindly, could you someone tell me how to read a page(any web site) using Python, what method to be used ? Paris -- http://mail.python.org/mailman/listinfo/python-list
Re: SQLite3, data not found
jim-on-linux wrote:
On Friday 16 March 2007 18:23, Jerry Hill wrote:
On 3/16/07, jim-on-linux [EMAIL PROTECTED]
wrote:
Below, the first select produces results but,
after closing then re-opening the database
the select produces an empty list. Anyone
know the reason ??
When you first open a connection, you
implicitly begin a transaction. You need to
call con.commit() before you close the
connection, or your transaction will be rolled
back when you close() it. If don't want to
bother with transaction handling, you can turn
it off when you open the connection, like this:
con = sqlite3.connect('myData',
isolation_level=None)
See the Python Database API 2.0 PEP for more
details about the behavior required of DB-API
2.0 compliant interfaces:
http://www.python.org/dev/peps/pep-0249/
--
Jerry
Thanks, this saves a lot of con.commit action.
And the website is valuable.
jim-on-linux
Don't turn off atomic transactions, use them.
Otherwise, two copies of your program running at the
same time will probably not do what you want.
Just call commit at the end of each transaction.
John Nagle
--
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Re: To count number of quadruplets with sum = 0
i have no NumPy to test it...
without Psyco Anton's code is the winner: ~48sec vs ~58sec of my code
But with Psyco my runtime is ~28sec; Anton's - ~30sec (PC: 1.6 ghz,
512 mb)
Not so bad.. keeping in mind that 256000 billions quadruplets to
check :)
import psyco, time
psyco.full()
t = time.clock()
def main():
q,w,e,r,sch,h = [],[],[],[],0,{}
f = open(D:/m4000.txt,rt)
for o in range(f.readline()):
row = map(int, f.readline().split())
q.append(row[0])
w.append(row[1])
e.append(row[2])
r.append(row[3])
f.close()
for x in q:
for y in w:
if h.has_key(x+y):
h[x+y] += 1
else:
h[x+y] = 1
for x in e:
for y in r:
if h.has_key(-(x+y)):
sch += h[-(x+y)]
q,w,e,r,h = None,None,None,None,None
print sch
main()
print time.clock() - t
--
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Re: read a web page using python
[EMAIL PROTECTED] schreef in bericht news:[EMAIL PROTECTED] Hi All, Kindly, could you someone tell me how to read a page(any web site) using Python, what method to be used ? Paris http://www.amk.ca/python/howto/sockets/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Phase change material ...
On Sat, 10 Mar 2007 20:23:27 GMT, Dan Bloomquist [EMAIL PROTECTED] wrote: [EMAIL PROTECTED] wrote: On Mar 8, 5:57 pm, martinl [EMAIL PROTECTED] wrote: Hi All, I'm looking for a substance that does a phase change at between 60 and 100 C. I settled for hurricane wax. (IGI-1260). But that, because I felt it would suit my application, domestic heating. I have 3 thousand pounds of the stuff. http://lakeweb.com/boiler/tubes.jpg Best, Dan. I don't know how I could have overlooked this note for several days. It sounds like a wonderfully adventurous design. I have not been keeping up with the literature, but phase change media ought to be the way to go. After all, if four tons of ice could hold a house down with a temp differential of 20 degreesC or so, then 1.5 tons of wax might have a good chance of holding the temperature up with a temp differential of 80-20degC= 60 degrees. Wonder what the latent heat is? Less than 340 kJ/kg I imagine. How much did it cost? Brian Whatcott Altus OK -- http://mail.python.org/mailman/listinfo/python-list
Re: read a web page using python
[EMAIL PROTECTED] wrote: Kindly, could you someone tell me how to read a page(any web site) using Python, what method to be used ? import urllib2 res = urllib2.urlopen(url) page = res.read() See: http://www.voidspace.org.uk/python/articles/urllib2.shtml -- Lawrence, oluyede.org - neropercaso.it It is difficult to get a man to understand something when his salary depends on not understanding it - Upton Sinclair -- http://mail.python.org/mailman/listinfo/python-list
Re: Odd error
I installed it using the regular download form python.org. I went
back and did a lot of testing with the file, commenting out most of
it, seeing what would actually run, and it seems I had a normal
semantic error:
self.data(one).append(item)
and data is in fact a dictionary, not a callable object. What gets me
is the massive red herring this error is. I wasn't doing anything
with ntpath in the script. The script selectively extracts
information from an XML file, that's all.
Thanks,
Josh
On Mar 17, 2:30 am, John Machin [EMAIL PROTECTED] wrote:
The following demonstrate the correct behaviour of ntpath.split():
Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit
(Intel)] on win32
Type help, copyright, credits or license for more information.
import ntpath
ntpath.split('foo')
('foo', '')
ntpath.split('foobar')
('foobar', '')
ntpath.split('foobar')
('foo', 'bar')
ntpath.split('foo\\bar')
('foo', 'bar')
ntpath.split('bar')
('', 'bar')
I can't see how this error could arise from the line:
while head2 and head2[-1] in '/\\':
The only possible iterable is the constant '/\\' ...
You may have a corrupt Python 2.5 installation; try the above tests;
if one fails, delete any ntpath.pyc and/or ntpath.pyo and try again.
I'm suspicious of the 'lib' directory name; standard Python
installations on Windows call the directory 'Lib' AFAIK; how did you
install Python?
HTH,
John
--
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Re: Weekly Python Patch/Bug Summary
Dick Moores [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] | I thought I'd give | http://svn.python.org/projects/python/branches/release25-maint/ | (the latest release (plus bug fixes) of Python) a try. I first backed | up my Python25 folder (I'm using Win XP). Then with Python 25 open I | opened the Explorer context menu for the folder and then the | TortoiseSVN sub-menu. There doesn't seem to have a menu item that | will enable me to update. I tried Export... and entered | http://svn.python.org/projects/python/branches/release25-maint/ as | URL of repository, but that choice seems to expect the Python25 | folder to be empty. Can you tell me what to do to just update? Just to make sure you know, the svn repository is source code that you will have to compile. If TortoiseSVN only copies repositories and reads and does not update, then you need svn itself. But I know almost nothing about it except the name. In any case, to update a local code repository, you would need one to begin with by downloading the whole think initially. tjr -- http://mail.python.org/mailman/listinfo/python-list
Re: To count number of quadruplets with sum = 0
n00m: i have no NumPy to test it... without Psyco Anton's code is the winner: ~48sec vs ~58sec of my code But with Psyco my runtime is ~28sec; Anton's - ~30sec (PC: 1.6 ghz, 512 mb) Not so bad.. keeping in mind that 256000 billions quadruplets to check :) I have oiled it a bit, you can try the speed of this too (for dicts in is always faster than has_key). from collections import defaultdict import time, psyco def main(): sch = 0 q,w,e,r = [],[],[],[] h = defaultdict(int) datafile = file(m1000.txt) datafile.next() xrows = (map(int, line.split()) for line in datafile) q, w, e, r = zip(*xrows) for x in q: for y in w: h[x+y] += 1 for x in e: for y in r: if -x-y in h: sch += h[-x-y] print sch t = time.clock() psyco.full() main() print round(time.clock() - t, 2), secs -- http://mail.python.org/mailman/listinfo/python-list
Re: Odd error
[EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] |I installed it using the regular download form python.org. I went | back and did a lot of testing with the file, commenting out most of | it, seeing what would actually run, and it seems I had a normal | semantic error: | | self.data(one).append(item) | | and data is in fact a dictionary, not a callable object. What gets me | is the massive red herring this error is. I wasn't doing anything | with ntpath in the script. The script selectively extracts | information from an XML file, that's all. When you run a script from IDLE, it saves it to disk, and in the process of saving, IDLE looks at the path. I don't think your script ever ran. At least that is what I gathered from the traceback. I agree with JM: the traceback and error message do not match, so this is indeed an 'odd' error. Terry Jan Reedy -- http://mail.python.org/mailman/listinfo/python-list
Re: To count number of quadruplets with sum = 0
[EMAIL PROTECTED] writes: for x in e: for y in r: if -x-y in h: sch += h[-x-y] I wonder whether g = h.get for x in e: for y in r: if -x-y in h: sch += g(-x-y, 0) might be a little bit faster. Also, -x-y could be saved in a variable. It's unfortunate that array.array objects don't support the .sort() operation. It would be interesting to compare the sorting-based scheme with the hashing-based one under psyco. O(n**2*log(n)) local memory references might be faster than O(n**2) hash operations and random lookups that almost always miss the cache. -- http://mail.python.org/mailman/listinfo/python-list
Re: To count number of quadruplets with sum = 0
Paul Rubin wrote:
n00m [EMAIL PROTECTED] writes:
Two first outputs is of above (your) code; next two - of my code:
Yeah, I see now that we both used the same algorithm. At first glance
I thought you had done something much slower. The 10 second limit
they gave looks like they intended to do it about this way, but with a
compiled language. 68 seconds isn't so bad for 4000 entries in pure
CPython. Next thing to do I think is use psyco or pyrex.
FWIW, the original program can also be compiled with Shed Skin (http://
mark.dufour.googlepages.com), an experimental (static-)Python-to-C++
compiler, resulting in a speedup of about 8 times for a single test
with 500 tuples. here's a slightly modified version that works with
Shed Skin CVS at least:
import time
t = time.clock()
q,w,e,r,sch,h = [],[],[],[],0,{}
f = open(m33.txt,rt)
n = int(f.readline())
for o in range(n):
row = [int(x) for x in f.readline().split()]
q.append(row[0])
w.append(row[1])
e.append(row[2])
r.append(row[3])
f.close()
for x in q:
for y in w:
if h.has_key(x+y):
h[x+y] += 1
else:
h[x+y] = 1
for x in e:
for y in r:
sch += h.get(-(x+y),0)
print sch
print time.clock() - t
Thanks,
Mark Dufour (Shed Skin author - send me bug reports!)
--
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running python on xp command prompt
Hi, I have a simple question about running python on windows xp command prompt. The file is as follows and is named spam.py: print 2**8 print 'the bright side' + 'of life' print hello world I run this on the command prompt as follows C:\Documents and Settings\Userpython C:\Documents and Settings\User \Desktop\spa m.py python: can't open file 'C:\Documents': [Errno 2] No such file or directory and get the error above. If I surround the second directory in quotes like this C:\Documents and Settings\Userpython C:\Documents and Settings\User \Desktop\spa m.py , there is no error. Does anyone know why this is. Thank you -- http://mail.python.org/mailman/listinfo/python-list
Re: running python on xp command prompt
On Mar 17, 2:15 pm, [EMAIL PROTECTED] wrote: Hi, I have a simple question about running python on windows xp command prompt. The file is as follows and is named spam.py: print 2**8 print 'the bright side' + 'of life' print hello world I run this on the command prompt as follows C:\Documents and Settings\Userpython C:\Documents and Settings\User \Desktop\spa m.py python: can't open file 'C:\Documents': [Errno 2] No such file or directory and get the error above. If I surround the second directory in quotes like this C:\Documents and Settings\Userpython C:\Documents and Settings\User \Desktop\spa m.py , there is no error. Does anyone know why this is. Thank you It is because of the spaces in the path. The command prompt assumes that when it encounters a space that is the end of the attribute. By surrounding it in quotes you are indicating that it is all one attribute. Steve -- http://mail.python.org/mailman/listinfo/python-list
Re: SQLite3, data not found
On Saturday 17 March 2007 13:51, John Nagle wrote:
jim-on-linux wrote:
On Friday 16 March 2007 18:23, Jerry Hill
wrote:
On 3/16/07, jim-on-linux
[EMAIL PROTECTED]
wrote:
Below, the first select produces results
but, after closing then re-opening the
database the select produces an empty list.
Anyone know the reason ??
When you first open a connection, you
implicitly begin a transaction. You need to
call con.commit() before you close the
connection, or your transaction will be
rolled back when you close() it. If don't
want to bother with transaction handling,
you can turn it off when you open the
connection, like this: con =
sqlite3.connect('myData',
isolation_level=None)
See the Python Database API 2.0 PEP for more
details about the behavior required of DB-API
2.0 compliant interfaces:
http://www.python.org/dev/peps/pep-0249/
--
Jerry
Thanks, this saves a lot of con.commit
action. And the website is valuable.
jim-on-linux
Don't turn off atomic transactions, use
them. Otherwise, two copies of your program
running at the same time will probably not do
what you want. Just call commit at the end of
each transaction.
John Nagle
Thanks
I appreciate the help.
jim-on-linux
--
http://mail.python.org/mailman/listinfo/python-list
Pickle and Instance Methods
I have a class that I am trying to pickle. One of the attributes is used to set a callback e.g. self.attribute.setCallback(self.callbackfunction). I understand that this cannot be saved by pickle. My question is, is there another way of setting a callback that would agree with pickle? If not is there some way to make pickle ignore the problem attribute? Thanks, Steve -- http://mail.python.org/mailman/listinfo/python-list
Re: Pickle and Instance Methods
I understand that this cannot be saved by pickle. My question is, is there another way of setting a callback that would agree with pickle? If not is there some way to make pickle ignore the problem attribute? Try adding a __getstate__ method to your class: http://docs.python.org/lib/pickle-inst.html -- http://mail.python.org/mailman/listinfo/python-list
class question
Hello there, i am pretty new to object-oriented programming and i have a question: let's say i have a simple class such as: class father: age=... name= def abcd. class son(father): age= name= def efgh: or any other heirarchic structure of class and subclasses. i would like to list or print the data content of a given instance of the subclass, all the way up (e.g. if sam is jack's son, so i would like to get their names and ages and use the class as a data structure for that matter). how do i do this? thanks, t -- http://mail.python.org/mailman/listinfo/python-list
Re: distributing python software in jar like fashion
ce wrote: On Mar 15, 10:23 am, alf [EMAIL PROTECTED] wrote: Hi, I have a small app which consist of a few .py files. Is there any way to distribute it in jar like fashion as a single file I can just run python on. I obviously look for platform independent solution. Thx in advance, A. You can import from zip achieves as PEP 273, but to execute in the same mechanism as the jar files, recently there is no way afaik. You could treat the collection of files as a Python package. You would then add an __init__.py file to your collection and, in that __init__.py arrange to initiate main.py (or whatever you call your initiator program). Colin W. ce (pain n d'ass) -- http://mail.python.org/mailman/listinfo/python-list
Re: Weekly Python Patch/Bug Summary
Terry Reedy wrote: Dick Moores [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] | I thought I'd give | http://svn.python.org/projects/python/branches/release25-maint/ | (the latest release (plus bug fixes) of Python) a try. I first backed | up my Python25 folder (I'm using Win XP). Then with Python 25 open I | opened the Explorer context menu for the folder and then the | TortoiseSVN sub-menu. There doesn't seem to have a menu item that | will enable me to update. I tried Export... and entered | http://svn.python.org/projects/python/branches/release25-maint/ as | URL of repository, but that choice seems to expect the Python25 | folder to be empty. Can you tell me what to do to just update? Just to make sure you know, the svn repository is source code that you will have to compile. If TortoiseSVN only copies repositories and reads and does not update, then you need svn itself. But I know almost nothing about it except the name. It's a fully-functional SVN client. It can update. -- Robert Kern I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth. -- Umberto Eco -- http://mail.python.org/mailman/listinfo/python-list
Automagically log changes in table
This is more in the context of Turbogears/SQLAlchemy, but if anyone has implemented something similar with other packages it might be useful to know. I'd like to have a way to make a table loggable, meaning it would get, say, two fields last_modified and modified_by, and every write operation on it would automatically record the time and the id of the user who did the addition or change (I'm not sure how to deal with deletions let's leave this for now). Has anyone done something like that or knows where to start from ? George -- http://mail.python.org/mailman/listinfo/python-list
Re: To count number of quadruplets with sum = 0
Mark Dufour:
FWIW, the original program can also be compiled with Shed Skin (http://
mark.dufour.googlepages.com), an experimental (static-)Python-to-C++
compiler, resulting in a speedup of about 8 times for a single test
with 500 tuples.
If we want to play, then this is a literal translation to D (I am not
much good in D yet, so maybe there are ways to improve this code a
bit), as you can see D syntax isn't that bad (I think sometimes D
copies some Python syntax):
// Compile with: dmd -O -release solver.d
import std.stdio, std.stream, std.string;
void main() {
size_t sch;
size_t[size_t] h;
size_t[] q,w,e,r;
int nrow = -1;
auto datafile = new File(m4000.txt, FileMode.In);
foreach(char[] row; datafile) {
if (nrow == -1) {
q.length = row.atoi();
w.length = row.atoi();
e.length = row.atoi();
r.length = row.atoi();
} else {
char[][] srow = row.split();
q[nrow] = srow[0].atoi();
w[nrow] = srow[1].atoi();
e[nrow] = srow[2].atoi();
r[nrow] = srow[3].atoi();
}
nrow++;
}
foreach (x; q)
foreach (y; w)
h[x+y]++;
foreach (x; e)
foreach (y; r) {
size_t* pointer = -x-y in h;
if (pointer)
sch += *pointer;
// simpler but slower:
// if (-x-y in h)
// sch += h[-x-y];
}
writefln(sch);
}
On my PC with the 1000 lines file this is about 2.2 times faster than
my Psyco version and about 4.6 times faster than the same code
without Psyco.
Bye,
bearophile
--
http://mail.python.org/mailman/listinfo/python-list
Re: Returning other instance from __init__ - I need help
Gabriel Genellina escreveu: En Fri, 16 Mar 2007 22:05:05 -0300, Paulo da Silva [EMAIL PROTECTED] escribió: ... class C(object): def __new__(cls, filename=None, foo=None, bar=None): if filename is not None: return cls.load(filename) inst = super(C, cls).__new__(cls) This makes the difference! I didn't know how to build an instance inside __new__. Thank you very much Gabriel. Paulo -- http://mail.python.org/mailman/listinfo/python-list
Still the __new__ hell ...
Sorry to put here too many questions about __init__ __new__ stuff but I always found a new problem when using them. I have searched for simple __new__ docs on how to do the basic things but find none. After trying the solutions people gently posted here (thanks) I run into new trouble when I go with further development. Here is the new situation. As suggested in a previous post, I used __new__ to subclass date class but now cPickle/pickle loads does not work. from datetime import date import cPickle,string class MyDate(date): def __new__(cls,year,month=None,day=None): if type(year) is str: year,month,day=map(int,string.split(year,'-')) if year100: year+=2000 return date.__new__(cls,year,month,day) class C1(object): def __init__(self): self.x=MyDate(2007-3-15) def f(self): print self.x c1=C1() d=cPickle.dumps(c1) c2=cPickle.loads(d) c2.f() 1. year is passed to __new__ as a string but with invalid contents! 2. If I had a __new__ in class C1, cPickle.loads invokes it with only one parameter. This forces to allow __new__ accept only 1 parameter (cls) which I don't want for the normal situation. Thanks for your patience. Paulo -- http://mail.python.org/mailman/listinfo/python-list
Re: Still the __new__ hell ...
On Mar 17, 9:31 pm, Paulo da Silva [EMAIL PROTECTED] wrote: Sorry to put here too many questions about __init__ __new__ stuff but I always found a new problem when using them. I have searched for simple __new__ docs on how to do the basic things but find none. After trying the solutions people gently posted here (thanks) I run into new trouble when I go with further development. Here is the new situation. As suggested in a previous post, I used __new__ to subclass date class but now cPickle/pickle loads does not work. from datetime import date import cPickle,string class MyDate(date): def __new__(cls,year,month=None,day=None): if type(year) is str: year,month,day=map(int,string.split(year,'-')) if year100: year+=2000 return date.__new__(cls,year,month,day) class C1(object): def __init__(self): self.x=MyDate(2007-3-15) def f(self): print self.x c1=C1() d=cPickle.dumps(c1) c2=cPickle.loads(d) c2.f() I haven't tried your code but I think that you may need to define a __reduce__ method in your MyDate class in order to give a clue to the python as to how to pickle its instances. For more details see: http://docs.python.org/lib/node321.html Something like: class MyDate(date): ... def __reduce__(self): return type(self), (self.year, self.month, self.day) might solve your problem. HTH -- Arnaud -- http://mail.python.org/mailman/listinfo/python-list
Re: Still the __new__ hell ...
On Mar 17, 4:31 pm, Paulo da Silva [EMAIL PROTECTED] wrote: Sorry to put here too many questions about __init__ __new__ stuff but I always found a new problem when using them. I have searched for simple __new__ docs on how to do the basic things but find none. After trying the solutions people gently posted here (thanks) I run into new trouble when I go with further development. Here is the new situation. As suggested in a previous post, I used __new__ to subclass date class but now cPickle/pickle loads does not work. from datetime import date import cPickle,string class MyDate(date): def __new__(cls,year,month=None,day=None): if type(year) is str: year,month,day=map(int,string.split(year,'-')) if year100: year+=2000 return date.__new__(cls,year,month,day) class C1(object): def __init__(self): self.x=MyDate(2007-3-15) def f(self): print self.x c1=C1() d=cPickle.dumps(c1) c2=cPickle.loads(d) c2.f() 1. year is passed to __new__ as a string but with invalid contents! 2. If I had a __new__ in class C1, cPickle.loads invokes it with only one parameter. This forces to allow __new__ accept only 1 parameter (cls) which I don't want for the normal situation. Thanks for your patience. Paulo Any special reason you have to use __new__ for this factory method? This version works, without the problems with __new__: def getDate(*args): if isinstance(args[0],basestring): year,month,day = map(int,string.split(args[0],'-')) else: year,month,day = args if year 100: year += 2000 return date(year,month,day) class C1(object): def __init__(self): #self.x=MyDate(2007-3-15) self.x = getDate(2007-3-15) def f(self): print self.x -- Paul -- http://mail.python.org/mailman/listinfo/python-list
Re: class question
[EMAIL PROTECTED] wrote: Hello there, i am pretty new to object-oriented programming and i have a question: let's say i have a simple class such as: class father: age=... name= def abcd. class son(father): age= name= def efgh: or any other heirarchic structure of class and subclasses. i would like to list or print the data content of a given instance of the subclass, all the way up (e.g. if sam is jack's son, so i would like to get their names and ages and use the class as a data structure for that matter). You misunderstand Python's classes. There is little, if any advantage to defining a class inside another class. How about: import weakref # to keep everyone from being immortal. class Person(object): def __init__(self, age, name, dad=None, mom=None): self.name = name self.age = age self.dad = dad self.mom = mom self._kids = weakref.WeakValueDictionary() if dad is not None: dad.add_kid(self) if mom is not None: mom.add_kid(self) def children(self): return self._kids.values() def add_kid(self, child): assert self.age child.age self._kids[id(child)] = child def __repr__(self): return '%s(%s)' % (self.name, self.age) guy = Person(age=28, name='George') gal = Person(age=31, name='Martha') kid = Person(age=1, name='Ellen', dad=guy, mom=gal) print '%s of %s and %s.' % (kid, kid.dad, kid.mom) print %s's kids: %s. % (guy, guy.children()) print %s's kids: %s. % (gal, gal.children()) --Scott David Daniels [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
[ANN] squisher 0.3
http://cheeseshop.python.org/pypi/squisher/0.3 I've posted the third version of my experimental packaging program Squisher. Squisher can take a directory representing a Python package (i.e. a directory with __init__.py) and squish it into a single .pyc file that you can import, or run on the command line, just like any other .py/.pyc file. The hook is that it can be thus imported *without* necessarily having Squisher itself installed. All you do is run Squisher on a directory (or an existing zip file if you wish), and you get a single file you can import with any normal Python installation. It is complementary to Eggs in a way. They're good for having packages globally installed and keeping them up-to-date, but very often you may want the simple convenience of dropping a .pyc in a directory and importing it. Furthermore, since Squished packages are just zip files with a special Python bytecode header (and Eggs are just zipfiles with internal metadata added), you can actually run it on an Egg and get a file that can be used as an Egg *or* a Squished package just by renaming it. Try it out... I've found it useful so far. It is still pretty experimental, so I wouldn't advise using it as a serious packaging mechanism yet, but I hope that with time it will become very stable and complete. Bug reports/patches welcome. -- Changelog for anyone who tried the previous releases: - Added a couple of patches courtesy of Gary Duzan -- a Python 2.3 compatibility fix, and a fix for importing compiled modules when running a .pyc from the command line. - Changed from GPL to BSD license. Also clarified that the generated bytecode is considered public domain. - It now detects if you pass it an already-squished module -- if so, it will simply update the bytecode header if necessary. -- http://mail.python.org/mailman/listinfo/python-list
MIME Magic
Hi, How can I determine the type of a file from magic bytes, similar to what the file command on unix does? I found http://docs.python.org/lib/module-mimetypes.html but this only seems to use the filename (extension) for finding the type. Any hints? -Samuel -- http://mail.python.org/mailman/listinfo/python-list
formatting strings to have the same width
hi, i got random strings and wanna attach a | at the end. now if i print them i want the | to always be underneath each other. example code: foo = [aaa, 1232] for each in foo: print foo[0].center(10, ) + | foo2 = 1232 print foo2.center(10, ) + | even though i define a constant width on the strings the | don't show up underneath each other. any ideas ? -- http://mail.python.org/mailman/listinfo/python-list
Re: formatting strings to have the same width
sorry the code should read: foo = [aaa, 1232] for each in foo: print each.center(10, ) + | -- http://mail.python.org/mailman/listinfo/python-list
Re: MIME Magic
Samuel [EMAIL PROTECTED] writes: Hi, How can I determine the type of a file from magic bytes, similar to what the file command on unix does? I found http://docs.python.org/lib/module-mimetypes.html but this only seems to use the filename (extension) for finding the type. Any hints? I'd start by taking a look at file's code. :-) The thing is being able to identify the signatures of several different types of files. Here's some help for you: http://www.garykessler.net/library/file_sigs.html And here's an example of an authoritative source for that table: http://www.libpng.org/pub/png/spec/1.2/PNG-Structure.html -- Jorge Godoy [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
Report options...
Hello, Right now Im migrating an VB6+Crystal report+Word App to Python+wxPython +Reportlab+??? The VB system work with Word creating some patterns (title, foot prints, etc) and users maybe could insert some Forms fields to personalize the output connecting this fields with an recordset. I dont want to use any external tool for this taks (OpenOffice+pyUno is my last chance) Any suggestion? Thanks! Mi configuracion/My config: Ubuntu Edgy Eft 6.10 Linux Kernel 2.6.17-11-386 Gnome 2.16.1 Python 2.4.4c1 wxPython 2.8.1.1 Unicode Python IDE: Ulipad 3.6 Database: Firebird 2.0 Superserver -- Saludos / Best regards Mario Lacunza Vásquez Desarrollador de Software - Webmaster Linux Registered User #439179 Desarrollador 2 Estrellas VS2005 Website: http://mlacunzav[DOT]cogia[DOT]net Email : mlacunza[AT]gmail.com / mario_lacunza[AT]yahoo.es Blog : http://mlacunza.blogspot.com Lima - Peru -- http://mail.python.org/mailman/listinfo/python-list
Re: formatting strings to have the same width
On Sat, 17 Mar 2007 16:07:44 -0700, spohle wrote: hi, i got random strings and wanna attach a | at the end. now if i print them i want the | to always be underneath each other. example code: foo = [aaa, 1232] for each in foo: print foo[0].center(10, ) + | foo2 = 1232 print foo2.center(10, ) + | even though i define a constant width on the strings the | don't show up underneath each other. any ideas ? Three possibilities: (1) Your code is fine, but whatever you are using to display the strings is wrong because it is using the wrong sort of font. What font are you using? If it is a proportional font, e.g. Times New Roman, then each different character is a different width, and counting characters is not likely to result in equal widths. e.g. compare these two lines: mw mw mw mw mw | il il il il il | If the vertical bars line up, you're (probably) using a fixed-width font like Courier. If they're not, you're (probably) using a proportional font like Ariel or Times. (2) Your code is fine, but your data is bad. You are centering your strings with a width of ten. Is it possible that some of the strings you are passing into the are longer than ten characters? If so, you'll get funny results, because str.center() will never shorten the string you pass it. (3) You code in Python like you write in English: poorly with lots of errors. Wanna isn't a word (unless you're trying to be funny), and capitalization is the difference between: I helped my Uncle Jack off a horse and I helped my uncle jack off a horse. After fixing your indentation error, your example code works perfectly for me. Perhaps your real code is different, and part of the difference causes the problem? For instance, your example code seems to do something unlikely to be useful: foo = [aaa, 1232] for each in foo: print foo[0].center(10, ) + | That prints the FIRST item each time around the loop, instead of each item. Also, you don't need the second argument to center. By default, space is used as a fill character. -- Steven. -- http://mail.python.org/mailman/listinfo/python-list
Re: MIME Magic
On Mar 18, 12:30 am, Jorge Godoy [EMAIL PROTECTED] wrote: I'd start by taking a look at file's code. :-) The thing is being able to identify the signatures of several different types of files. Here's some help for you:http://www.garykessler.net/library/file_sigs.html And here's an example of an authoritative source for that table:http://www.libpng.org/pub/png/spec/1.2/PNG-Structure.html Actually, I am looking for an existing solution because I do not want to write it from scratch... I hope I am not out of options. -Samuel -- http://mail.python.org/mailman/listinfo/python-list
Re: Still the __new__ hell ...
Arnaud Delobelle escreveu: On Mar 17, 9:31 pm, Paulo da Silva [EMAIL PROTECTED] wrote: ... I used __new__ to subclass date class but now cPickle/pickle loads does not work. from datetime import date import cPickle,string class MyDate(date): def __new__(cls,year,month=None,day=None): if type(year) is str: year,month,day=map(int,string.split(year,'-')) if year100: year+=2000 return date.__new__(cls,year,month,day) class C1(object): def __init__(self): self.x=MyDate(2007-3-15) def f(self): print self.x c1=C1() d=cPickle.dumps(c1) c2=cPickle.loads(d) c2.f() I haven't tried your code but I think that you may need to define a __reduce__ method in your MyDate class in order to give a clue to the python as to how to pickle its instances. For more details see: http://docs.python.org/lib/node321.html Something like: class MyDate(date): ... def __reduce__(self): return type(self), (self.year, self.month, self.day) might solve your problem. HTH -- Arnaud Thanks. This works exactly the way you wrote. Yet I am misunderstanding something. Can't pickle see that being MyDate derived from date it also has to look at variables from date? When do I need to do this? I am using pickle with a lot more complex classes without this problem. Thank you Paulo -- http://mail.python.org/mailman/listinfo/python-list
Re: Automagically log changes in table
Hi You can get this using triggers and stored procedures. These are SQL engine dependent! This is available for long time with postgress and only from version 5 with mysql. This let you write SQL code (Procedure) that will be called when trigged by an event like inserting new row, updating rows, deleting BR On 17 mar, 21:43, George Sakkis [EMAIL PROTECTED] wrote: This is more in the context of Turbogears/SQLAlchemy, but if anyone has implemented something similar with other packages it might be useful to know. I'd like to have a way to make a table loggable, meaning it would get, say, two fields last_modified and modified_by, and every write operation on it would automatically record the time and the id of the user who did the addition or change (I'm not sure how to deal with deletions let's leave this for now). Has anyone done something like that or knows where to start from ? George -- http://mail.python.org/mailman/listinfo/python-list
Re: formatting strings to have the same width
On Mar 18, 10:17 am, spohle [EMAIL PROTECTED] wrote: sorry the code should read: foo = [aaa, 1232] for each in foo: print each.center(10, ) + | Works OK for me on the console: Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit (Intel)] on win 32 Type help, copyright, credits or license for more information. foo = ['123', '1234', '12345'] for each in foo: ... print each.center(10, .) + | ... ...123 | ...1234... | ..12345... | for each in foo: ... print each.center(10, ) + | ... 123 | 1234| 12345| for each in foo: ... guff = each.center(10, ) + | ... print guff + str(len(guff)) ... 123 | 13 1234| 13 12345| 13 Of course if I go into IDLE and change it to use a proportionally spaced font (e.g. Arial), and do this: foo = ['l', 'm'] for each in foo: print each.center(10, ' ') + ' | ' l| m| naturally they don't line up. If something like that isn't the cause of your problem, you'll need to provide more information about your environment. HTH, John -- http://mail.python.org/mailman/listinfo/python-list
Re: tkinter grid vs pack
On 18 mar, 16:49, Gigs_ [EMAIL PROTECTED] wrote: For what is grid better than pack, and otherwise? thanks in advance Grid are useful to align items vertically _AND_ horizontally ! For example to make adialog box with label of different length Firstname: John__ Lastname: Smith__ Contry: Uk__ to align vertically Firstname and John , Lastname and Smith But ALSO horizontaly John, Smith and Uk ! -- http://mail.python.org/mailman/listinfo/python-list
Re: MIME Magic
On 18 mar, 00:54, Samuel [EMAIL PROTECTED] wrote: On Mar 18, 12:30 am, Jorge Godoy [EMAIL PROTECTED] wrote: I'd start by taking a look at file's code. :-) The thing is being able to identify the signatures of several different types of files. Here's some help for you:http://www.garykessler.net/library/file_sigs.html And here's an example of an authoritative source for that table:http://www.libpng.org/pub/png/spec/1.2/PNG-Structure.html Actually, I am looking for an existing solution because I do not want to write it from scratch... I hope I am not out of options. -Samuel python-magic : Python binding for the magic library This Python library can be use to query /etc/magic information for a given file in Python. -- http://mail.python.org/mailman/listinfo/python-list
How to parse the os.system() output in python
Hi, I use os.system() to execute a system command in python. Can you please tell me how can I parse (in python) the output of the os.system() ? Thank you. -- http://mail.python.org/mailman/listinfo/python-list
IDE for wxPython
Hello python-list, Can anyone suggest an IDE for wxPython? Or an IDE for TkInter? Thanks. -- Best regards, Ghirai. -- http://mail.python.org/mailman/listinfo/python-list
Looking for a job?
Free. Find a Job here now-- http://www.jobbankdata.com -- http://mail.python.org/mailman/listinfo/python-list
Re: IDE for wxPython
On Mar 17, 4:12 pm, Ghirai [EMAIL PROTECTED] wrote: Hello python-list, Can anyone suggest an IDE for wxPython? Or an IDE for TkInter? Thanks. -- Best regards, Ghirai. You might want to check out SPE. It's a great Python IDE. http://pythonide.blogspot.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: How to parse the os.system() output in python
On Mar 17, 2007, at 8:28 PM, [EMAIL PROTECTED] wrote: Hi, I use os.system() to execute a system command in python. Can you please tell me how can I parse (in python) the output of the os.system() ? Thank you. Sounds like you want os.popen, not os.system. http://docs.python.org/lib/module-popen2.html Dave -- http://mail.python.org/mailman/listinfo/python-list
Webcams and python
I'm using VideoCapture in windows to obtain images from my webcam. The thing is, if i want to show a live video from my webcam i have to make an infinite loop and request an image everytime: from VideoCapture import Device cam = Device() while 1: img = cam.getImage() Now, by doing this, my processor fires up to 100% load, which obviously makes my pc useless. Is there any way or algorithm to lower the cpu load? Thx. -- http://mail.python.org/mailman/listinfo/python-list
Re: Automagically log changes in table
On Mar 17, 7:59 pm, aspineux [EMAIL PROTECTED] wrote: Hi You can get this using triggers and stored procedures. These are SQL engine dependent! This is available for long time with postgress and only from version 5 with mysql. This let you write SQL code (Procedure) that will be called when trigged by an event like inserting new row, updating rows, deleting I'd rather avoid triggers since I may have to deal with Mysql 4. Apart from that, how can a trigger know the current user ? This information is part of the context (e.g. an http request), not stored persistently somewhere. It should be doable at the framework/orm level but I'm rather green on Turbogears/SQLAlchemy. George -- http://mail.python.org/mailman/listinfo/python-list
Re: IDE for wxPython
On Mar 18, 2:23 am, sleek [EMAIL PROTECTED] wrote: On Mar 17, 4:12 pm, Ghirai [EMAIL PROTECTED] wrote: Hellopython-list, Can anyone suggest an IDE for wxPython? Or an IDE for TkInter? Thanks. -- Best regards, Ghirai. You might want to check outSPE. It's a greatPythonIDE.http://pythonide.blogspot.com/ The latest version SPE 0.8.4 is currently only available through subversion and will hopefully be released on the 1st of april: svn checkout svn://svn.berlios.de/python/spe/trunk/_spe Stani -- http://pythonide.stani.be -- http://mail.python.org/mailman/listinfo/python-list
Re: How to parse the os.system() output in python
On 17 Mar 2007 17:28:56 -0700, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: I use os.system() to execute a system command in python. Can you please tell me how can I parse (in python) the output of the os.system() ? Maybe you mean to parse the output of the program you run using os.system. If this is the case, you should redirect the putput of the program to a file (with ) and then parse that file. Best, SB. -- http://mail.python.org/mailman/listinfo/python-list
Re: To count number of quadruplets with sum = 0
bearophileH!
I gave to your oil svrl runs (z in dict instd of dict.has_key
saved only ~0.4 sec).
The result is (and I'm completely lost in all these
*optimizations* :)):
RESTART ===
0
34.78 secs (bearophileH)
RESTART ===
0
34.77 secs (bearophileH)
RESTART ===
0
34.76 secs (bearophileH)
RESTART ===
0
27.2460938471 secs (n00m)
RESTART ===
0
27.2953596058 secs (n00m)
RESTART ===
0
27.3709929614 secs (n00m)
In the name of exactness this is the tested codes:
++
from collections import defaultdict
import time, psyco
def main():
sch = 0
q,w,e,r = [],[],[],[]
h = defaultdict(int)
datafile = file(D:/m4000.txt)
datafile.next()
xrows = (map(int, line.split()) for line in datafile)
q, w, e, r = zip(*xrows)
for x in q:
for y in w:
h[x+y] += 1
for x in e:
for y in r:
if -x-y in h:
sch += h[-x-y]
print sch
t = time.clock()
psyco.full()
main()
print round(time.clock() - t, 2), secs (bearophileH)
++
++
import psyco, time
def main():
q,w,e,r,sch,h = [],[],[],[],0,{}
f = open(D:/m4000.txt,rt)
for o in range(int(f.readline())):
row = map(int, f.readline().split())
q.append(row[0])
w.append(row[1])
e.append(row[2])
r.append(row[3])
f.close()
for x in q:
for y in w:
if (x+y) in h:
h[x+y] += 1
else:
h[x+y] = 1
for x in e:
for y in r:
if -(x+y) in h:
sch += h[-(x+y)]
q,w,e,r,h = None,None,None,None,None
print sch
t = time.clock()
psyco.full()
main()
print time.clock() - t,secs (n00m)
++
PS Both Python Psyco of 2.5 ver.
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Re: To count number of quadruplets with sum = 0
my dial-up line's too slow for downloading 4mb of shedskin-0.0.20.exe -- http://mail.python.org/mailman/listinfo/python-list
List to string
Hi, I've a list like this.. str1 = ['this is a test string inside list'] I am doing it this way. for s in str1: temp_s = s print temp_s Any better suggestions? Thank you, hj -- http://mail.python.org/mailman/listinfo/python-list
Re: How to parse the os.system() output in python
how to redirect the putput of the program to a file? thanks. Sebastian Bassi [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] On 17 Mar 2007 17:28:56 -0700, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: I use os.system() to execute a system command in python. Can you please tell me how can I parse (in python) the output of the os.system() ? Maybe you mean to parse the output of the program you run using os.system. If this is the case, you should redirect the putput of the program to a file (with ) and then parse that file. Best, SB. -- http://mail.python.org/mailman/listinfo/python-list
Re: List to string
On Mar 18, 12:28 am, Hitesh [EMAIL PROTECTED] wrote: Hi, I've a list like this.. str1 = ['this is a test string inside list'] I am doing it this way. for s in str1: temp_s = s print temp_s Any better suggestions? Thank you, hj I want to cast value of a list into string.. -- http://mail.python.org/mailman/listinfo/python-list
Re: How to parse the os.system() output in python
On 3/18/07, bruce peng [EMAIL PROTECTED] wrote: how to redirect the putput of the program to a file? like this: program_name -parameters outfile.txt -- http://mail.python.org/mailman/listinfo/python-list
Re: List to string
On Sat, 17 Mar 2007 21:28:56 -0700, Hitesh wrote: Hi, I've a list like this.. str1 = ['this is a test string inside list'] That's a bad name for the variable. It's called str1 but it is a list. I am doing it this way. for s in str1: temp_s = s print temp_s That's redundant. Why not just print s? That will work perfectly. You can do any of the following, depending on what you are trying to do. my_list = [first string, second string, third string] # print the entire list as a string print my_list # print each string individually for s in my_list: print s # save the string representation of the entire list as a variable my_str = repr(my_list) another_str = str(my_list) Note that repr() and str() may have different results, depending on the type of object you pass into them. # extract the first string into another variable my_str = my_list[0] # insert the third string into another string my_string = This is the %s here. % my_list[2] Hope that helps. -- Steven. -- http://mail.python.org/mailman/listinfo/python-list
[ANN] GCC 4.1.2 installer for Python distutils compilation
Hello, This page: http://www.develer.com/oss/GccWinBinaries contains a friendly Windows installer for GCC 4.1.2 (MinGW binary version), with full support for integrating it with Python installations so that it is used by distutils to compile Python extensions. Direct download link: http://www.develer.com/~rasky/gcc-4.1.2-mingw-setup.exe Who needs this package? * People who wants to use FLOSS tools to develop Python extensions. * People who wants to use the recent GCC 4.1.2 to develop Python extensions, given that it easily outperforms the 4-years-old Visual Studio .NET 2003. What's special about this? * mingw.org still has GCC 3.4.2, so go figure. Also, you need to compose other packages together. This is a single installer with everything inside. * By default, MinGW GCC links with MSVCRT.DLL, and not MSVCR71.DLL (used by Python 2.4 and 2.5). Fixing this is pretty complicate, and there's much confusion (Google turns up red herrings). This package handles everything for you, and it just works. -- Giovanni Bajo Develer S.r.l. http://www.develer.com -- http://mail.python.org/mailman/listinfo/python-list
Re: To count number of quadruplets with sum = 0
RESTART ===
0
30.4740708665 secs (Anton Vredegoor)
RESTART ===
0
30.4132625795 secs (Anton Vredegoor)
RESTART ===
0
30.4812175849 secs (Anton Vredegoor)
+++
import psyco, time
def freq(L):
D = {}
for x in L:
D[x] = D.get(x,0)+1
return D
def test():
f = file('D:/m4000.txt')
f.readline()
L = []
for line in f:
L.append(map(int,line.split()))
q,w,e,r = map(freq,zip(*L))
sch,h = 0,{}
for xk,xv in q.iteritems():
for yk,yv in w.iteritems():
if h.has_key(xk+yk):
h[xk+yk] += xv*yv
else:
h[xk+yk] = xv*yv
for xk,xv in e.iteritems():
for yk,yv in r.iteritems():
if h.has_key(-(xk+yk)):
sch += h[-(xk+yk)]*xv*yv
print sch
t = time.clock()
psyco.full()
test()
print time.clock() - t,secs (Anton Vredegoor)
+++
PS
The same PC: AMD Sempron +2600 (1.6 GHz); 512 MB RAM.
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[ python-Bugs-1681671 ] Python and Indeterminate Forms (Math)
Bugs item #1681671, was opened at 2007-03-15 12:28 Message generated for change (Comment added) made by josiahcarlson You can respond by visiting: https://sourceforge.net/tracker/?func=detailatid=105470aid=1681671group_id=5470 Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: Python Interpreter Core Group: Python 2.3 Status: Open Resolution: None Priority: 5 Private: No Submitted By: jehahn (jehahn) Assigned to: Nobody/Anonymous (nobody) Summary: Python and Indeterminate Forms (Math) Initial Comment: Primary example: Python 2.3.5 (#1, Mar 20 2005, 20:38:20) [GCC 3.3 20030304 (Apple Computer, Inc. build 1809)] on darwin Type help, copyright, credits or license for more information. 0 ** 0 1 Per http://mathworld.wolfram.com/Indeterminate.html, 0 ** 0 is an indeterminate form. 0 ** 0 should probably return NaN and NOT 1. Other examples include: Python 2.3.5 (#1, Mar 20 2005, 20:38:20) [GCC 3.3 20030304 (Apple Computer, Inc. build 1809)] on darwin Type help, copyright, credits or license for more information. inf = float(infinity) inf ** 0 1.0 1 ** inf 1.0 For a few others, Python provides an arguably correct answer of NaN. Examples: Python 2.3.5 (#1, Mar 20 2005, 20:38:20) [GCC 3.3 20030304 (Apple Computer, Inc. build 1809)] on darwin Type help, copyright, credits or license for more information. inf = float(infinity) inf * 0 nan inf / inf nan inf - inf nan And, of course, for the most obvious indeterminate form (0/0) Python does precisely the right thing: Python 2.3.5 (#1, Mar 20 2005, 20:38:20) [GCC 3.3 20030304 (Apple Computer, Inc. build 1809)] on darwin Type help, copyright, credits or license for more information. 0/0 Traceback (most recent call last): File stdin, line 1, in ? ZeroDivisionError: integer division or modulo by zero It could be argued that the correct thing to do here is to throw an exception - mathematically speaking these forms are about as meaningful as division by zero which Python handles by throwing an exception. (unlike Java and IEEE 754, which do arguably evil things here by returning +/- infinity for the quantity k/0 for all k != 0) Unfortunately, some people doing numerical work may have gotten used to the current Python behavior so the change isn't without risk. And some of the current values are common conventions used to simplify certain common issues. (e.g. 0 ** 0 == 1) Moreover, I don't know if this is dependent on platform (having only tried it on a couple of the boxes I have handy.) However, from a mathematical purist's standpoint, Python is doing the wrong thing on these counts. -- Comment By: Josiah Carlson (josiahcarlson) Date: 2007-03-17 01:20 Message: Logged In: YES user_id=341410 Originator: NO Python's behavior with respect to floating point arithmetic is left to the platform's C floating point libraries. For example, on my Windows machine running Python 2.3.5, float(infinity) raises a ValueError. I would also point out that 0/0 is integer division in Python 2.3.5 . For other examples of platform-specific behavior: Python 2.3.5 (#62, Feb 8 2005, 16:23:02) [MSC v.1200 32 bit (Intel)] on win32 Type help, copyright, credits or license for more information. inf*0 -1.#IND inf**0 1.0 1**inf Traceback (most recent call last): File stdin, line 1, in ? ValueError: (33, 'Domain error') inf*0 -1.#IND inf/inf -1.#IND inf-inf -1.#IND So yeah. If you don't like how Python does math, complain to your vendor (Apple) or compile a version of Python with a C floating point library that works the way you want it to. -- You can respond by visiting: https://sourceforge.net/tracker/?func=detailatid=105470aid=1681671group_id=5470 ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[ python-Bugs-1682729 ] Documentation error (section 3.4.1)
Bugs item #1682729, was opened at 2007-03-17 15:03 Message generated for change (Tracker Item Submitted) made by Item Submitter You can respond by visiting: https://sourceforge.net/tracker/?func=detailatid=105470aid=1682729group_id=5470 Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: Documentation Group: None Status: Open Resolution: None Priority: 5 Private: No Submitted By: emlyn (emlyncorrin) Assigned to: Nobody/Anonymous (nobody) Summary: Documentation error (section 3.4.1) Initial Comment: In the documentation section 3.4.1 Basic customization (url: http://docs.python.org/ref/customization.html) it states: There are no reflected (swapped-argument) versions of these methods (to be used when the left argument does not support the operation but the right argument does); rather, __lt__() and __gt__() are each other's reflection, __le__() and __ge__() are each other's reflection, and __eq__() and __ne__() are their own reflection. Surely that should be __lt__() and __ge__() are each other's reflection, and __le__() and __gt__(). I assume this is just a typo, but I haven't checked that Python itself gets it right. -- You can respond by visiting: https://sourceforge.net/tracker/?func=detailatid=105470aid=1682729group_id=5470 ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[ python-Bugs-1682749 ] next method assignment is ignored in new-style classes
Bugs item #1682749, was opened at 2007-03-17 15:06 Message generated for change (Tracker Item Submitted) made by Item Submitter You can respond by visiting: https://sourceforge.net/tracker/?func=detailatid=105470aid=1682749group_id=5470 Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: Python Interpreter Core Group: Python 2.5 Status: Open Resolution: None Priority: 5 Private: No Submitted By: Albert Weichselbraun (albert2611) Assigned to: Nobody/Anonymous (nobody) Summary: next method assignment is ignored in new-style classes Initial Comment: in old-style classes the next method of an iterator-superclass can be overwritten using self.next = self.new_next_method when new-style classes are used the assignment is ignored and instead of new_next_method the next method of the superclass is called when the class is used as iterator (tested for python2.3-2.5 under debian/linux). - if the next() method is called directly, the assigned method is used (see attached code example). -- You can respond by visiting: https://sourceforge.net/tracker/?func=detailatid=105470aid=1682749group_id=5470 ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
