ANN: Python Ireland Meeting and Presentations
The Python Ireland group will be meeting on Thursday, 19th October at Trinity College Arts Block, room 2041B from 19:00 - 20:00. The following presentations are lined up: * What's new in python 2.5 * Introduction to web.py This will be followed by a drink or two in the nearest pub. For more information and directions see http://wiki.python.ie/moin.cgi/PythonMeetup/October2006 For more information on the Python Ireland group see http://python.ie/ cheers, Michael -- http://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations.html
OSDC 2006's fabulous keynotes
Book before 31st October to save $50 and get a free conference t-shirt! Registrations are open for the Open Source Developers' Conference 2006: http://www.osdc.com.au/registration/index.html The conference is running in Melbourne from the 6th - 8th December, with a day of tutorials on the 5th. Keynote talks this year include: Anthony Baxter: futurepython import __future__ What does the future hold for the Python language? In this talk, we'll look at Microsoft's (Open Sourced!) IronPython and show some of the massive fun coming down the track for scripting languages thanks to .Net and Mono. We'll also cover Python 3.0 (now under development) and the PyPy (Python, in Python) project. Damian Conway: The Da Vinci Codebase When a dying operating system scrawls his name across its corrupted boot volume, Dr. Damian Conway, an unassuming college professor, is plunged into a deadly race against time to solve a series of impossible riddles. What is the mysterious Priory of Bios? And who are their deadly nemeses Opus Arai? On the run from the law and stalked by a ghostly pale killer, will he unravel the subtle clues hidden in Leonardo's most famous source code and reveal to the world the incredible secret encrypted in...the Da Vinci Codebase? Randal L. Schwartz: Free software - A look back, a look ahead A twenty year history of the free/open software movement, from my perspective of how to contribute (in many ways!) and how to make money as well. Richard Farnsworth: Open Source Synchrotron What is a Synchrotron anyway? What software needs does it has? How can Open Source help solve these? The Australian Synchrotron achieved first light in July 2005 almost exclusively filling its software needs through open source. The code base has been refined to suit local conditions, and shared with the rest of the Synchrotron open source community. By sharing information, experience and software freely between scientists and engineers, great design efficiencies have been made further aiding the development of experimental beamlines. Be a part of this fantastic conference and help it be the best developers' conference this year! If your business would like to benefit from exposure to many of Australia's best open source developers then perhaps you should consider sponsorship. We have a wide range of sponsorship options, to find out more information please visit: http://www.osdc.com.au/sponsors/index.html We look forward to sharing this great conference with you! Don't forget to register before 31st October to get a free conference t-shirt. http://www.osdc.com.au/registration/index.html -- Richard Jones, OSDC 2006 Programme Chair http://www.osdc.com.au/ -- http://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations.html
Re: A friendlier, sugarier lambda -- a proposal for Ruby-like blocksin python
Bruno Desthuilliers [EMAIL PROTECTED] wrote: Kay Schluehr wrote: Bruno Desthuilliers wrote: Just for the record : Ruby's code-blocks (closures, really) come from Smalltalk, which is still the OneTrueObjectLanguage(tm). IsTheOneTrueObjectLanguage(tm)ReallyCamelCased? ThatsAGoodQuestion. DoYouMeanIsTheIdentifierTheOneTrueObjectLanguage(tm)CamelCasedOrIsTheObjectObjec tBoundToIdentifierTheOneTrueObjectLanguage(tm)CamelCasedOrYetSomethingElse? IAmGladToSeeThisSterlingAttemptAtMinimisingTheEncodingSpaceAsTheSpaceCharacterNe verImpartedAnyInformationAnywayHendrik -- http://mail.python.org/mailman/listinfo/python-list
Re: COM Error -- Urgent help
Hi! .func( is not defined... @-salutations -- Michel Claveau -- http://mail.python.org/mailman/listinfo/python-list
a question about s[i:j] when i is negative
s[i:j] slice of s from i to j (3), (4) (3) If i or j is negative, the index is relative to the end of the string: len(s) + i or len(s) + j is substituted. But note that -0 is still 0. (4) The slice of s from i to j is defined as the sequence of items with index k such that i = k j. If i or j is greater than len(s), use len(s). If i is omitted or None, use 0. If j is omitted or None, use len(s). If i is greater than or equal to j, the slice is empty. i can't follow (3) very well. for example:k = [1,2,3,4,5] k[-1:2]=[] k[-5:2]=[1,2] but k[-6:2] = [1,2] why k[-6:2] is [1,2]not [].i do follow (3),to make i positive by plusing len(k) twice.But the result is not what i expect.why,or did i misunderstand the rule of (3). -- http://mail.python.org/mailman/listinfo/python-list
Re: a question about s[i:j] when i is negative
dracula571 wrote: but k[-6:2] = [1,2] why k[-6:2] is [1,2]not [].i do follow (3),to make i positive by plusing len(k) twice. twice? /F -- http://mail.python.org/mailman/listinfo/python-list
Re: Python component model
Terry Reedy wrote: Ilias Lazaridis [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] I share the infrastructure which I use: http://dev.lazaridis.com/base But not quite yet, it appears. A public release is planned shortly Thank you for you comment. You are right. I've not yet selected the license yet (this case is quite complex): http://case.lazaridis.com/wiki/License But I've placed a BSD2 license to the existent files: http://dev.lazaridis.com/base/browser/infra . -- http://mail.python.org/mailman/listinfo/python-list
Scope of decorator argument
Hi, this: class base(object): @adecorator(xy) def edit(self): print edit class child(base): xy = 3 obviously fails because xy is not bound at class creation time of the base object. One solution could be delegation: class base(object): @classmethod def edit(self): print do the real work here class child(object): xy = 3 mybase = base @adecorator(xy) def edit(self, *args, **kwargs): self.mybase.edit(*args, **kwargs) But then I have the ugly boiler plate delegation code in child. Is there any other solution, probably with metaclasses ? -- Servus, Gregor -- http://mail.python.org/mailman/listinfo/python-list
Re: Python component model
Peter Wang wrote: Ilias Lazaridis wrote: looks interesting. Thanks! what about persistency? Um... what about it? As far as I can see, there's no persistency binding available. Is one planned? http://groups.google.com/group/comp.lang.python/msg/dbdaedc68eee653a . -- http://lazaridis.com -- http://mail.python.org/mailman/listinfo/python-list
Re: a question about s[i:j] when i is negative
dracula571 wrote: s[i:j] slice of s from i to j (3), (4) (3) If i or j is negative, the index is relative to the end of the string: len(s) + i or len(s) + j is substituted. But note that -0 is still 0. (4) The slice of s from i to j is defined as the sequence of items with index k such that i = k j. If i or j is greater than len(s), use len(s). If i is omitted or None, use 0. If j is omitted or None, use len(s). If i is greater than or equal to j, the slice is empty. i can't follow (3) very well. for example:k = [1,2,3,4,5] k[-1:2]=[] k[-5:2]=[1,2] but k[-6:2] = [1,2] why k[-6:2] is [1,2]not []. Because 6 is greater then len(k), so when you ask for i=-6, you get i=-5 instead. And relative -5 is actually absolute 0 which is less than 2, so you do not get an empty slice. i do follow (3),to make i positive by plusing len(k) twice.But the result is not what i expect.why,or did i misunderstand the rule of (3). See (4). -- http://mail.python.org/mailman/listinfo/python-list
Re: Best IDE?
On 10/14/06, Fulvio [EMAIL PROTECTED] wrote: *** Your mail has been scanned by InterScan MSS. *** On Friday 13 October 2006 23:17, limodou wrote: hope you try it. If you'll manage for macro recording, playing back and from file then I'll be yours :) F I'll add this funcationality at 3.6 version. And I want to release 3.5 as soon as I can. -- I like python! UliPad The Python Editor: http://wiki.woodpecker.org.cn/moin/UliPad My Blog: http://www.donews.net/limodou -- http://mail.python.org/mailman/listinfo/python-list
RE: Thread termination
Hello
you are using the module variable ie inside the Generic
Function, but you have to use "d" since this is the Python object
which is allowed to access the COM object in the
separate thread.
Stefan
From: Tejovathi P
[mailto:[EMAIL PROTECTED] Sent: Monday, October 16, 2006 9:47
AMTo: Stefan SchukatSubject: Re: Thread
termination
HI all,
I have a problem in accesing COM objects in threads. To be precise, lets
assume that I have a class GenericFunctions which is defined as follows:
import win32com.client, pythoncom, thread
ie=win32com.client.Dispatch('internetexplorer.application')
ie.Visible=1
class GenericFunctions:
def
__init__(self):
print "In Constructor of Generic
Functions"
def
MyNavigate(self,dest):
ie.Navigate(dest)
Now there is another file Main.py which is defined as
follows:
import win32com.client, pythoncom, thread from GenericFunctions import
*obj = GenericFunctions()
class Mainclass: def
__init__(self);
print "In Constructor of Main class"
def
threadFunction(self,dest):
pythoncom.CoInitialize()
d=pythoncom.CoGetInterfaceAndReleaseStream(s,
pythoncom.IID_IDispatch)
my_ie=win32com.client.Dispatch(d)
obj.func(dest) # this is
gving an
error.
pythoncom.CoUninitialize()
if __name__ == "__main__":
s=pythoncom.CoMarshalInterThreadInterfaceInStream(pythoncom.IID_IDispatch,ie)
thread.start_new_thread(self.nav, (s,'www.google.com ')
Basically, I want to access object of GenericFunctions class inside
threadFunction(). However I was able to execute my_ie.Navigate("google.com"). But that was not I wanted. I am not
knowing where the error is Please let me know the solution ASAP...
Teja.P
On 10/13/06, Stefan
Schukat [EMAIL PROTECTED]
wrote:
Reading
from your last posts you are using COM objects. Therefore youshould not
"kill" the thread since this would lead to reference leaks. So there are
only two ways left:1. Program a specific interpreter and not use
python.exe whichimplements an access to PyThreadState_SetAsyncExc2.
Check in the separate thread at specific times a variable which is set
in the main thread.Both need the try finally construct in the
threadfunction to release COMobjects in the right way.I.e., (taking
the source from Roger):def ThreadFunction(istream, dest):
pythoncom.CoInitialize() // Initialize COM
Runtime for this thread
try:
d=pythoncom.CoGetInterfaceAndReleaseStream(istream,pythoncom.IID_IDispatch)
my_ie=win32com.client.Dispatch
(d)
my_ie.Navigate(dest)
finally:
my_ie = None// Release COM
object
pythoncom.CoUninitialize() // Release COM Runtime for
thisthread Stefan
--
http://mail.python.org/mailman/listinfo/python-list
Re: Max-plus library
Robert Kern wrote: Martin Manns wrote: Hello, Is there any library that allows employing max-plus dioids in python (e.g. based on numpy/scipy)? Google says no and I haven't heard of any, so I imagine that there aren't. There might be something buried in some of the control theory packages, but as I neither know what max-plus dioids are, nor have I any current interest in them, I can't give you any better pointers. See http://cermics.enpc.fr/~cohen-g//SED/index-e.html for a two-page introduction to the field and its applications. Definitely worth a look IMHO. The second software you refer to (http://www-rocq.inria.fr/MaxplusOrg/soft.html) is a Scilab package but essentially made of C and Fortran files. Getting a working binding for Python may not be that hard ... Cheers, SB -- 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
How to paras such echo string effection?
Hi everyone, When i decide to paras a string,which return from running a CVS command,it's amaze that i want to get some file of the echo string ,how to make paras process more effect? the problem detail as follow that: run command:cvs status -r it will return all the file list in as follow? ===File: file01.xlsStatus: Up-to-date Working revision:1.1 Repository revision:1.1/msg/file01.xls,v Sticky Tag:(none) Sticky Date:(none) Sticky Options:-kb cvs status: Examining 20060815===File: file02.xlsStatus: Up-to-date Working revision:1.1 Repository revision:/msg/file02.xls ,v Sticky Tag:(none) Sticky Date:(none) Sticky Options:-kb cvs status: Examining 20060816=== Now ,i just what to know the file of Status,if paras all should be coast expenses,is there any effect way? PS:is there any python lib for CVS ? Thanks Best regards Kevin Lee -- http://mail.python.org/mailman/listinfo/python-list
Re: COM Error -- Urgent help
Méta-MCI wrote: Hi! .func( is not defined... @-salutations -- Michel Claveau I am sorry. By func(dest) I meant MyNavigate(dest). Can u please help me out... Thnks, Teja.P -- http://mail.python.org/mailman/listinfo/python-list
Re: Scope of decorator argument
Gregor Horvath schrieb: Is there any other solution, probably with metaclasses ? I've found this one: class mymeta(type): def __new__(meta, class_name, bases, new_attrs): new_attrs[edit] = adecorator(new_attrs['xy'])(bases[0].edit)) return type.__new__(meta, class_name, bases, new_attrs) class base(object): def edit(self): print %s edit % self class child(base): __metaclass__ = mymeta xy = 3 Don't know if it's the best solution but it seems to work. -- Servus, Gregor -- http://mail.python.org/mailman/listinfo/python-list
Re: How to paras such echo string effection?
On 10/17/06, Kevien Lee [EMAIL PROTECTED] wrote: Hi everyone, When i decide to paras a string,which return from running a CVS command,it's amaze that i want to get some file of the echo string ,how to make paras process more effect? the problem detail as follow that: run command:cvs status -r it will return all the file list in as follow? === File: file01.xls Status: Up-to-date Working revision: 1.1 Repository revision: 1.1 /msg/file01.xls,v Sticky Tag: (none) Sticky Date: (none) Sticky Options: -kb cvs status: Examining 20060815 === File: file02.xls Status: Up-to-date Working revision: 1.1 Repository revision:/msg/file02.xls ,v Sticky Tag: (none) Sticky Date: (none) Sticky Options: -kb cvs status: Examining 20060816 === Now ,i just what to know the file of Status,if paras all should be coast expenses,is there any effect way? PS:is there any python lib for CVS ? I think you can use regular expression to match the Status. Or simple find 'File' and 'Status' substring, and get the result. -- I like python! UliPad The Python Editor: http://wiki.woodpecker.org.cn/moin/UliPad My Blog: http://www.donews.net/limodou -- http://mail.python.org/mailman/listinfo/python-list
Re: How to paras such echo string effection?
On 10/17/06, Kevien Lee [EMAIL PROTECTED] wrote: PS:is there any python lib for CVS ? Doubt it, but there is a Python library for Subversion (SVN CVS anyway). -- Theerasak -- http://mail.python.org/mailman/listinfo/python-list
Re: COM Error -- Urgent help
Teja wrote: I am sorry. By func(dest) I meant MyNavigate(dest). Can u please help me out... nobody here can read your mind. please post the code you're actually using, *and* the error you're getting. /F -- http://mail.python.org/mailman/listinfo/python-list
Re: How to paras such echo string effection?
Kevien Lee wrote: PS:is there any python lib for CVS ? there's some stuff in Demo/pdist in the Python source distribution, including a module called cvslib. /F -- http://mail.python.org/mailman/listinfo/python-list
Re: How to paras such echo string effection?
On 10/17/06, Fredrik Lundh [EMAIL PROTECTED] wrote: Kevien Lee wrote: PS:is there any python lib for CVS ? there's some stuff in Demo/pdist in the Python source distribution, including a module called cvslib. then I stand corrected... -- Theerasak -- http://mail.python.org/mailman/listinfo/python-list
Re: A friendlier, sugarier lambda -- a proposal for Ruby-like blocksin python
On 10/17/06, Hendrik van Rooyen [EMAIL PROTECTED] wrote: Bruno Desthuilliers [EMAIL PROTECTED] wrote: Kay Schluehr wrote: Bruno Desthuilliers wrote: Just for the record : Ruby's code-blocks (closures, really) come from Smalltalk, which is still the OneTrueObjectLanguage(tm). IsTheOneTrueObjectLanguage(tm)ReallyCamelCased? ThatsAGoodQuestion. DoYouMeanIsTheIdentifierTheOneTrueObjectLanguage(tm)CamelCasedOrIsTheObjectObjec tBoundToIdentifierTheOneTrueObjectLanguage(tm)CamelCasedOrYetSomethingElse? IAmGladToSeeThisSterlingAttemptAtMinimisingTheEncodingSpaceAsTheSpaceCharacterNe verImpartedAnyInformationAnywayHendrik BurnMeIfThisIsntTurningIntoCeeTwoWiki -- http://www.c2.com/cgi/wiki?TheerasakPhotha -- http://mail.python.org/mailman/listinfo/python-list
Re: COM Error -- Urgent help
Fredrik Lundh wrote:
Teja wrote:
I am sorry. By func(dest) I meant MyNavigate(dest). Can u please help
me out...
nobody here can read your mind. please post the code you're actually
using, *and* the error you're getting.
/F
Thnks for your immediate reply.
Here is the code:
I have a class GenericFunctions which is defined as
follows:
import win32com.client, pythoncom, thread
ie=win32com.client.Dispatch('internetexplorer.application')
ie.Visible=1
class GenericFunctions:
def __init__(self):
print In Constructor of Generic Functions
def MyNavigate(self,dest):
ie.Navigate(dest)
Now there is another file Main.py which is defined as follows:
import win32com.client, pythoncom, thread
from GenericFunctions import *
obj = GenericFunctions()
def threadFunction(self,dest):
pythoncom.CoInitialize()
d=pythoncom.CoGetInterfaceAndReleaseStream(s,
pythoncom.IID_IDispatch)
my_ie=win32com.client.Dispatch(d)
obj.MyNavigate(dest) # this is gving an error.
pythoncom.CoUninitialize()
if __name__ == __main__:
s=pythoncom.CoMarshalInterThreadInterfaceInStream(pythoncom.IID_IDispatch,ie)
thread.start_new_thread(self.nav, (s,'www.google.com')
I am getting an attribute error
--
http://mail.python.org/mailman/listinfo/python-list
Re: A friendlier, sugarier lambda -- a proposal for Ruby-like blocks in python
On 14 Oct 2006 09:25:00 -0700, Paul Boddie [EMAIL PROTECTED] wrote: Unlike Java, Python's first class functions and methods are already highly useful for callback-based systems Curious: how well does the use of returning inner functions work as a strategy for providing effectively 'anonymous' callbacks? e.g. def outer(x): def inner(y): ... return inner -- Theerasak -- http://mail.python.org/mailman/listinfo/python-list
Any idea how to do this in Python?
In a web application users can post some information. I would like to link each posting with a weight of importance for a user, depending on a keywords in the posting. For example, I know that a user A is interested in Nokia mobiles while user B in Siemens mobiles. So, if a user A is signed, he would see postings with more Nokia information FIRST, while B user will see FIRST information about Siemens mobiles How can be that done in Python? Thank you for any idea. L. -- http://mail.python.org/mailman/listinfo/python-list
Re: a question about s[i:j] when i is negative
Fredrik Lundh 写道： dracula571 wrote: but k[-6:2] = [1,2] why k[-6:2] is [1,2]not [].i do follow (3),to make i positive by plusing len(k) twice. twice? /F that is -6 + len(k) + len(k) =4 -- http://mail.python.org/mailman/listinfo/python-list
Numpy-f2py troubles
Hello NG, I am using the latest Numpy release 1.0rc2 which includes F2PY. I have switched to Python 2.5 so this is the only alternative I have (IIUC). With Python 2.4, I was able to build a very simple fortran extension without problems. My extension contains 4 subroutines that scan a file and do simple operations. Now, attempting to run the second subroutine as: dprops, dwgnames, dunits = readsmspec.readsmspec(smspec, dimens) Prompt a ValueError from Python: File D:\MyProjects\Carolina\MainPanel.py, line 894, in ReadSMSPECFile dprops, dwgnames, dunits = readsmspec.readsmspec(smspec, dimens) ValueError: data type must provide an itemsize ?!? I have never seen anything like that and googling around didn't give me any answer. The function accepts two inputs: - smspec: a filename, maximum 1000 characters long - dimens: an integer and returns 3 array of chars, each of them with size (8, dimens). Does anyone know what I may be doing wrong? Thank you very much for every pointer. -- Andrea. Imagination Is The Only Weapon In The War Against Reality. http://xoomer.virgilio.it/infinity77/ -- http://mail.python.org/mailman/listinfo/python-list
Re: a question about s[i:j] when i is negative
[EMAIL PROTECTED] 写道： dracula571 wrote: s[i:j] slice of s from i to j (3), (4) (3) If i or j is negative, the index is relative to the end of the string: len(s) + i or len(s) + j is substituted. But note that -0 is still 0. (4) The slice of s from i to j is defined as the sequence of items with index k such that i = k j. If i or j is greater than len(s), use len(s). If i is omitted or None, use 0. If j is omitted or None, use len(s). If i is greater than or equal to j, the slice is empty. i can't follow (3) very well. for example:k = [1,2,3,4,5] k[-1:2]=[] k[-5:2]=[1,2] but k[-6:2] = [1,2] why k[-6:2] is [1,2]not []. Because 6 is greater then len(k), so when you ask for i=-6, you get i=-5 instead. And relative -5 is actually absolute 0 which is less than 2, so you do not get an empty slice. i do follow (3),to make i positive by plusing len(k) twice.But the result is not what i expect.why,or did i misunderstand the rule of (3). See (4). when compared with len(k), the value of i is a absolute value? in this example,i used -6 to compare with len(k). I misunstood the rule (4),and used (3) wrong by plusing len(k) twice to make it positive ,that is -6 + len(k) + len(k) = 4. Thanks -- http://mail.python.org/mailman/listinfo/python-list
Re: A Universe Set
On Mon, 16 Oct 2006 09:21:11 -0500, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: [me] - the wildcard object, which compares equal to everything else [Paul] Paul class MatchAny(object): Paul def __cmp__(self,other): Paul return 0 Paul wild = MatchAny() FWIW, I define __eq__ in the one I (infrequently) use. ... You're at the mercy of the comparison machinery implemented by individual classes. Executing this script (using any of Python 2.3 through what's currently in the SVN repository): ... Oh. /Is/ there a way of making it work, then? If we ignore the problems with having such objects in the first place, that is. /Jorgen -- // Jorgen Grahn grahn@Ph'nglui mglw'nafh Cthulhu \X/ snipabacken.dyndns.org R'lyeh wgah'nagl fhtagn! -- http://mail.python.org/mailman/listinfo/python-list
Re: a question about s[i:j] when i is negative
dracula571 wrote: dracula571 wrote: but k[-6:2] = [1,2] why k[-6:2] is [1,2]not [].i do follow (3),to make i positive by plusing len(k) twice. twice? that is -6 + len(k) + len(k) =4 sure, but what makes you think you should add the length twice? /F -- http://mail.python.org/mailman/listinfo/python-list
Re: COM Error -- Urgent help
Dennis Lee Bieber wrote: On 17 Oct 2006 00:58:59 -0700, Teja [EMAIL PROTECTED] declaimed the following in comp.lang.python: thread.start_new_thread(self.nav, (s,'www.google.com') I am getting an attribute error That can not be the REAL code... I'd expect a syntax error... You have mismatched parens on that line! -- WulfraedDennis Lee Bieber KD6MOG [EMAIL PROTECTED] [EMAIL PROTECTED] HTTP://wlfraed.home.netcom.com/ (Bestiaria Support Staff: [EMAIL PROTECTED]) HTTP://www.bestiaria.com/ Hi, Ya its a copy paste error... But can u please let me know what is the reason for attribute error and how to rectify it?? Thnks, Regards Teja.P -- http://mail.python.org/mailman/listinfo/python-list
Re: COM Error -- Urgent help
Teja wrote: s=pythoncom.CoMarshalInterThreadInterfaceInStream(pythoncom.IID_IDispatch,ie) thread.start_new_thread(self.nav, (s,'www.google.com') I am getting an attribute error the traceback tells you what attribute Python was looking for, and may also provide additional clues. can you post the traceback too? make sure you include all of it. /F -- http://mail.python.org/mailman/listinfo/python-list
Re: COM Error -- Urgent help
Teja wrote: Dennis Lee Bieber wrote: On 17 Oct 2006 00:58:59 -0700, Teja [EMAIL PROTECTED] declaimed the following in comp.lang.python: thread.start_new_thread(self.nav, (s,'www.google.com') I am getting an attribute error That can not be the REAL code... I'd expect a syntax error... You have mismatched parens on that line! -- Wulfraed Dennis Lee Bieber KD6MOG [EMAIL PROTECTED][EMAIL PROTECTED] HTTP://wlfraed.home.netcom.com/ (Bestiaria Support Staff:[EMAIL PROTECTED]) HTTP://www.bestiaria.com/ Hi, Ya its a copy paste error... But can u please let me know what is the reason for attribute error and how to rectify it?? How many times need you a beating with a clue-stick? Post the _actual_ code, not something that closely resembles it - in _your_ opinion Post the error message And before you do all this, read: http://www.catb.org/~esr/faqs/smart-questions.html Diez -- http://mail.python.org/mailman/listinfo/python-list
Re: COM Error -- Urgent help
Diez B. Roggisch wrote:
Teja wrote:
Dennis Lee Bieber wrote:
On 17 Oct 2006 00:58:59 -0700, Teja [EMAIL PROTECTED] declaimed
the following in comp.lang.python:
thread.start_new_thread(self.nav, (s,'www.google.com')
I am getting an attribute error
That can not be the REAL code... I'd expect a syntax error... You
have mismatched parens on that line!
--
Wulfraed Dennis Lee Bieber KD6MOG
[EMAIL PROTECTED][EMAIL PROTECTED]
HTTP://wlfraed.home.netcom.com/
(Bestiaria Support Staff:[EMAIL PROTECTED])
HTTP://www.bestiaria.com/
Hi,
Ya its a copy paste error... But can u please let me know what is the
reason for attribute error and how to rectify it??
How many times need you a beating with a clue-stick?
Post the _actual_ code, not something that closely resembles it - in _your_
opinion
Post the error message
And before you do all this, read:
http://www.catb.org/~esr/faqs/smart-questions.html
Diez
OK Ok .. Here is the final code thats giving an error:
GenericFunctions.py
--
import win32com.client, pythoncom, thread
ie=win32com.client.Dispatch('internetexplorer.application')
ie.Visible=1
class GenericFunctions:
def __init__(self):
print In Constructor of Generic Functions
def MyNavigate(self,dest):
ie.Navigate(dest)
---
MainThread.py
--
import win32com.client, pythoncom, thread
from GenericFunctions import *
obj = GenericFunctions()
import sys,traceback
def threadFunction(s,dest):
pythoncom.CoInitialize()
try:
d=pythoncom.CoGetInterfaceAndReleaseStream(s,
pythoncom.IID_IDispatch)
my_ie=win32com.client.Dispatch(d)
#d.MyNavigate(dest)
obj.MyNavigate(dest) # this is gving an error.
except:
my_ie = None
print traceback.print_exc(file= sys.stdout)
pythoncom.CoUninitialize()
if __name__ == __main__:
s=pythoncom.CoMarshalInterThreadInterfaceInStream(pythoncom.IID_IDispatch,ie)
thread.start_new_thread(threadFunction, (s,'www.google.com'))
-
And here is the error:
Traceback (most recent call last):
File C:\Documents and Settings\dzxbrn\Desktop\Stop Test\13
Oct\MainThread.py, line 13, in threadFunction
obj.MyNavigate(dest) # this is gving an error.
File C:\Documents and Settings\dzxbrn\Desktop\Stop Test\13
Oct\GenericFunctions.py, line 9, in MyNavigate
ie.Navigate(dest)
File C:\Python24\Lib\site-packages\win32com\client\dynamic.py, line
489, in __getattr__
raise AttributeError, %s.%s % (self._username_, attr)
AttributeError: internetexplorer.application.Navigate
None
This is highly urgent and important... Please help me out
Thnks Regards,
Tejovathi.P
--
http://mail.python.org/mailman/listinfo/python-list
Re: python's OOP question
neoedmund wrote:
(snip)
So I can reuse a method freely only if it's worth reusing.
For the word inheritance, in some aspect, meanings reuse the super
class, with the condition: must reuse everything from super class.
Not really. In fact, inheritance *is* a special case of
composition/delegation. A 'child' class is a class that has references
to other classes - it's 'parents' -, and then attributes that are not
found in the instance or child class are looked up in the parents
(according to mro rules in case of multiple inheritance). And that's all
there is.
It's lack of a option to select which methods are to be reused.
Methods not redefined in the 'child' class or it's instance are
'reusable'. Now they are only effectively 'reused' if and when called by
client code. So the 'option to select which methods are to be reused' is
mostly up to both the 'child' class and code using it.
this is something should be improved for general OOP i think.
So to answer What is your problem with having the other extra methods
too ?,
in real life, a class is not defined so well that any method is needed
by sub-class.
Then perhaps is it time to refactor. A class should be a highly cohesive
unit. If you find yourself needing only a specific subset of a class, it
may be time to extract this subset in it's own class. Given Python's
support for both multiple inheritance and composition/delegation, it's
usually a trivial task (unless you already mixed up too many orthogonal
concerns in your base class...).
--
bruno desthuilliers
python -c print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in '[EMAIL PROTECTED]'.split('@')])
--
http://mail.python.org/mailman/listinfo/python-list
Re: A Universe Set
Jorgen Grahn [EMAIL PROTECTED] wrote: - the wildcard object, which compares equal to everything else [Paul] Paul class MatchAny(object): Paul def __cmp__(self,other): Paul return 0 Paul wild = MatchAny() FWIW, I define __eq__ in the one I (infrequently) use. The advantage to using __eq__ is that it fails to work correctly less often than __cmp__. Compare skip's example where comparison against datetime give the wrong answer 100% of the time with __cmp__ and 50% of the time with __eq__/__ne__: import datetime class MatchAny(object): def __cmp__(self,other): return 0 wild = MatchAny() print wild == datetime.datetime.now() False print datetime.datetime.now() == wild False print wild != datetime.datetime.now() True print datetime.datetime.now() != wild True class MatchAny(object): def __eq__(self,other): return True def __ne__(self,other): return False wild = MatchAny() print wild == datetime.datetime.now() True print datetime.datetime.now() == wild False print wild != datetime.datetime.now() False print datetime.datetime.now() != wild True ... You're at the mercy of the comparison machinery implemented by individual classes. Executing this script (using any of Python 2.3 through what's currently in the SVN repository): ... Oh. /Is/ there a way of making it work, then? If we ignore the problems with having such objects in the first place, that is. In a contained environment, it can be made to work 'well enough'. So if you are writing unit tests and want a wildcard element to include inside data structures, AND you can guarantee that you always assert in the order expected,actual, then you can probably get away with it. That's assuming you remembered to use __eq__/__ne__ rather than __cmp__. For an object safe to let out in the wild though there isn't any way to implement it. -- http://mail.python.org/mailman/listinfo/python-list
Re: Cannot import a module from a variable
On 16/10/06, Bruno Desthuilliers [EMAIL PROTECTED] wrote: Jia Lu wrote: Hi all: I try to do things below: import sys for i in sys.modules.keys(): import i Traceback (most recent call last): File pyshell#67, line 2, in module import i ImportError: No module named i But it seems that import donot know what is i ? The import statement expects a name (a symbol), not a string. eval( 'import %s' % modname) and eval( 'reload(%s)' % modname) Usual warnings about eval apply, but in this case it is usable. HTH :) -- http://mail.python.org/mailman/listinfo/python-list
Re: Any idea how to do this in Python?
Dennis, Thank you for your reply You say: Pretend you are the computer/application/etc. How would YOU perform such a ranking? That is what I do not know , how to perform such ranking. Do you have any idea? Regards, Lad. -- http://mail.python.org/mailman/listinfo/python-list
Re: Book about database application development?
Wolfgang Keller wrote:
Developping quality SQLDBMS-based applications requires more than a
bit of SQL knowledge.
No doubt. :-) But my bit is enough to get me going and to know where to
look for further information if I hit a wall. Especially the people on the
Postgres mailinglists (as well as the excellent documentation of Postgres)
tend to be very helpful here. :-)
Well, this was intended as a general observation !-)
What I'm interested in is rather how to connect a GUI to a database, with
quite a bit of application logic in between. And how to do it well.
This is more a general design question than a database-related (or even
Python-related) one.
The question is specific to database applications in so far as these are
typically client-server aplications (multiple users working with the same
data with all the resulting concurrency nightmares), and as the volumes and
the complexity of the data to be handled are non-trivial.
This can be true for non database-applications (well... non SQL DBMS
based applications would be better here I think) as well.
The answer starts with forgetting about connect(ing) a GUI to a database
IMHO
Well, _somehow_ the GUI _has_ to be connected to the database. ;-)
The GUI has to be connected to the application, which uses the database.
There's no need for the GUI code itself to know anything about the SQL DBMS.
I didn't say that this would be through a spaghetti-heap of SQL queries
hard-coded into the GUI event handlers.
Hopefully not !-)
and experience. Might be time to google for MVC...
I know about the existence of MVC. But what I'm actually missing is a nice
textbook that teaches how to actually implement it
Yes, this can be another problem. But FWIW, most modern GUI toolkits
already do a big part of the job.
(and other design patterns
which are useful for database applications) in a real-world application in a
way that leads to non-ridiculous behaviour of the resulting application when
it gets actually used.
There are some known anti-patterns at least. Like selecting a whole
table (preferably with all attributes) then looping thru the result set
just to count the number of records in the table (don't laugh, I've
actually seens this (and even worse) in production code).
But given your concerns, I don't think you'd do such a thing anyway !-)
--
bruno desthuilliers
python -c print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in '[EMAIL PROTECTED]'.split('@')])
--
http://mail.python.org/mailman/listinfo/python-list
Re: Python 2.4 online certification - new items available for Beta testing
[EMAIL PROTECTED] wrote: Randy There is a free Beta test of a Python 2.4 Certification test Randy available at Brainbench.com. They are a provider of skills-based Randy certification exams. Go to the link below to find the test. It Randy is free to take the test. Randy http://www.brainbench.com/xml/bb/common/testcenter/betatests.xml I've given up on Brainbench. Ignoring the possibility that their certification tests may not be all that useful, they never stopped spamming me, so I refuse to help them with anything. Skip I went through their first test module (although using a mailinator address after this testimonial from Skip) and I think Beta is generous. Try pre-alpha - i marked nearly half (maybe more than half) of the 20 questions as no correct answer, and a number of the others included sample code that stank to high heaven. I also pointed out that what does this code do? type questions are pretty pointless for a language that comes with an interactive interpreter (I would actually be somewhat disappointed with any Python programmer whose automatic reaction to such a question involving deliberately obfuscated code *wasn't* to try it out on the nearest interpreter prompt). -- http://mail.python.org/mailman/listinfo/python-list
Re: Any idea how to do this in Python?
Lad wrote: Dennis, Thank you for your reply You say: Pretend you are the computer/application/etc. How would YOU perform such a ranking? That is what I do not know , how to perform such ranking. Do you have any idea? Regards, Lad. take a piece of paper to *play* the use-case you wrote about. Do things one step at a time, and figure what is needed, Example: 1- a user is on a web page # ok I need a web page 2- a user sends info to the server # ok the web page needs a input widget of sorts AND I need a server app 3- analyse (or decide ) what type of info the user may send (selected choices, free text, etc) 4- the user must be identified in some way (so to discriminate him from others), so the also must be that type of input... etc, etc At the end you will have a better picture of things required - then you build them ;-) Jean-Marc -- http://mail.python.org/mailman/listinfo/python-list
Re: Any idea how to do this in Python?
On 17 Oct 2006 02:56:45 -0700, Lad [EMAIL PROTECTED] wrote: Dennis, Thank you for your reply You say: Pretend you are the computer/application/etc. How would YOU perform such a ranking? That is what I do not know , how to perform such ranking. Do you have any idea? The details are very sketchy, but if it's just one item in particular that's being favored, you could just have something like 'Google sponsored ads', where there's a small box with links to everything related to Siemens Mobile at the top. (keke, he said 'Siemens', lol) -- Theerasak -- http://mail.python.org/mailman/listinfo/python-list
Re: Cannot import a module from a variable
Tim Williams wrote: eval( 'reload(%s)' % modname) reload takes a module object, not a module name. since you need to have the object, you might as well pass it to the reload() function. /F -- http://mail.python.org/mailman/listinfo/python-list
Re: Output from subprocess.Popen()
Fredrik Lundh wrote: Clodoaldo Pinto Neto wrote: But I still don't understand what is happening. The manual says that when shell=True the executable argument specifies which shell to use: no, it says that when shell=True, it runs the command through the default shell. that is, it hands it over to the shell for execution, pretty much as if you'd typed it in yourself. If shell=True, the executable argument specifies which shell to use. Taken from 6.8.1 v2.4: The executable argument specifies the program to execute. It is very seldom needed: Usually, the program to execute is defined by the args argument. If shell=True, the executable argument specifies which shell to use. On Unix, the default shell is /bin/sh. On Windows, the default shell is specified by the COMSPEC environment variable. -- http://mail.python.org/mailman/listinfo/python-list
Re: Cannot import a module from a variable
Tim Williams [EMAIL PROTECTED] wrote: The import statement expects a name (a symbol), not a string. eval( 'import %s' % modname) and eval( 'reload(%s)' % modname) Usual warnings about eval apply, but in this case it is usable. Did you actually try your suggestion before posting? modname = 'os' eval( 'import %s' % modname) Traceback (most recent call last): File pyshell#4, line 1, in module eval( 'import %s' % modname) File string, line 1 import os ^ SyntaxError: invalid syntax Also, it is pretty pointless to import the module and not know which arbitrary variable name it will have created. It is much simpler just to use the __import__ builtin: module = __import__(modname) module module 'os' from 'C:\Python25\lib\os.pyc' -- http://mail.python.org/mailman/listinfo/python-list
Re: A friendlier, sugarier lambda -- a proposal for Ruby-like blocks in python
Theerasak Photha skrev: On 14 Oct 2006 09:25:00 -0700, Paul Boddie [EMAIL PROTECTED] wrote: Unlike Java, Python's first class functions and methods are already highly useful for callback-based systems Curious: how well does the use of returning inner functions work as a strategy for providing effectively 'anonymous' callbacks? e.g. def outer(x): def inner(y): ... return inner Well enough, I'd imagine. There may be people who resent having to use a statement to create a block of code, especially one which defines a local name (the horror!), but as the lambda replacement discussions showed, a sub-statement code block doesn't necessarily have an acceptable formulation in non-Lisp-like languages. Or, at least, people struggled to find such a formulation in Python which didn't severely affect readability, and there are people who regard even uncontroversial but related things as list comprehensions as being much less readable than most other constructs in the language. Paul -- http://mail.python.org/mailman/listinfo/python-list
We're recruiting Python programmers
I'll keep this brief. Please see the web site for details Thanks. -- Dale Strickland-Clark We are recruiting Python programmers. Please see the web site. Riverhall Systems www.riverhall.co.uk -- http://mail.python.org/mailman/listinfo/python-list
Re: Alphabetical sorts
On 2006-10-17, Ron Adam [EMAIL PROTECTED] wrote: Neil Cerutti wrote: On 2006-10-16, Ron Adam [EMAIL PROTECTED] wrote: I have several applications where I want to sort lists in alphabetical order. Most examples of sorting usually sort on the ord() order of the character set as an approximation. But that is not always what you want. Check out strxfrm in the locale module. It looks to me this would be a good candidate for a configurable class. Something preferably in the string module where it could be found easier. Is there anyway to change the behavior of strxfrm or strcoll? For example have caps before lowercase, instead of after? You can probably get away with writing a strxfrm function that spits out numbers that fit your definition of sorting. -- Neil Cerutti Whenever I see a homeless guy, I always run back and give him money, because I think: Oh my God, what if that was Jesus? --Pamela Anderson -- http://mail.python.org/mailman/listinfo/python-list
Re: OT: What's up with the starship?
On Mon, 16 Oct 2006 14:50:03 -0500, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: suggests that it was sufficiently obscure that either a) nobody who knew about it found a way to take advantage of it, or b) it was only recently It might well be difficult to exploit to run arbitrary code because your exploit code needs to have no unprintable bytes in it; repr() turns unprintable characters into \xNN, after all, and isn't doing a straightforward string copy. (But hackers can be very clever...) --amk -- http://mail.python.org/mailman/listinfo/python-list
Re: Alphabetical sorts
On Mon, 16 Oct 2006 22:22:47 -0500, Ron Adam [EMAIL PROTECTED] wrote: ... I see this is actually a very complex subject. ... It looks to me this would be a good candidate for a configurable class. Something preferably in the string module where it could be found easier. /And/ choosing a locale shouldn't mean changing a process-global state. Sometimes you want to perform something locale-depending in locale A, followed by doing it in locale B. Switching locales today takes time and has the same problems as global variables (unless there is another interface I am not aware of). But I suspect that is already a well-known problem. /Jorgen -- // Jorgen Grahn grahn@Ph'nglui mglw'nafh Cthulhu \X/ snipabacken.dyndns.org R'lyeh wgah'nagl fhtagn! -- http://mail.python.org/mailman/listinfo/python-list
Newbie: datetime conversion question
Hi, I'm trying to convert some code from Ruby to Python, specifically.. timestamp = %08x % Time.now.to_i Make a hex version of the current timestamp. Any ideas how best to do this in python gratefully received.. -- http://mail.python.org/mailman/listinfo/python-list
Re: Newbie: datetime conversion question
kevin evans wrote: I'm trying to convert some code from Ruby to Python, specifically.. timestamp = %08x % Time.now.to_i Make a hex version of the current timestamp. Any ideas how best to do this in python gratefully received.. that's perfectly valid Python code, provided Time is an object that has a now property which in turn has a to_i property. but assuming that you don't have such an object, you can do something like: timestamp = %02x % time.time() /F -- http://mail.python.org/mailman/listinfo/python-list
Re: Newbie: datetime conversion question
On Tue, 2006-10-17 at 08:43, kevin evans wrote: Hi, I'm trying to convert some code from Ruby to Python, specifically.. timestamp = %08x % Time.now.to_i Make a hex version of the current timestamp. Any ideas how best to do this in python gratefully received.. import time timestamp = %08x % int(time.time()) -Carsten -- http://mail.python.org/mailman/listinfo/python-list
Re: Newbie: datetime conversion question
kevin evans wrote: Hi, I'm trying to convert some code from Ruby to Python, specifically.. timestamp = %08x % Time.now.to_i Make a hex version of the current timestamp. Any ideas how best to do this in python gratefully received.. how about import time %08X% (int)(time.mktime(time.localtime())) hg -- http://mail.python.org/mailman/listinfo/python-list
Re: Newbie: datetime conversion question
kevin I'm trying to convert some code from Ruby to Python, kevin specifically.. kevin timestamp = %08x % Time.now.to_i kevin Make a hex version of the current timestamp. Any ideas how best kevin to do this in python gratefully received.. Try import time timestamp = hex(int(time.time())) Skip -- http://mail.python.org/mailman/listinfo/python-list
Re: Newbie: datetime conversion question
On Tue, 2006-10-17 at 08:49, hg wrote: import time %08X% (int)(time.mktime(time.localtime())) Have you not had your coffee yet or are you trying to win an obfuscated python programming competition? ;) -Carsten -- http://mail.python.org/mailman/listinfo/python-list
Re: COM Error -- Urgent help
Teja:
ie=win32com.client.Dispatch('internetexplorer.application')
ie.Visible=1
class GenericFunctions:
def __init__(self):
print In Constructor of Generic Functions
def MyNavigate(self,dest):
ie.Navigate(dest)
You are using an interface created on the main thread here.
...
d=pythoncom.CoGetInterfaceAndReleaseStream(s,
pythoncom.IID_IDispatch)
my_ie=win32com.client.Dispatch(d)
#d.MyNavigate(dest)
obj.MyNavigate(dest) # this is gving an error.
After all the trouble of marshalling the interface into this thread
you aren't using it. Pass my_ie to MyNavigate. I also had some errors
before changing from thread to threading.
Neil
--
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RE: Any idea how to do this in Python?
On 17 Oct 2006 02:56:45 -0700, Lad [EMAIL PROTECTED] wrote: Dennis, Thank you for your reply You say: Pretend you are the computer/application/etc. How would YOU perform such a ranking? That is what I do not know , how to perform such ranking. Do you have any idea? Maybe something like, As you capture the input from the web form in your python app on the server, pull out the keywords you are interested in and store those together with logon/user information in a database. Alongside that, store the text for all your adverts in a database along with a list of keywords for each advert. Then, when it comes to displaying the targeted adverts on a webpage, grab the user keywords from the database, use them to match against adverts that have the same keywords stored in the database, then choose from those adverts and include the output into your webpage. Something like that should at least ensure the relevant ad's turn up on the page. As to a more sophisticated 'weighting' scheme, you could start doing things like associating values with keywords, matching up which keywords a user has used against the keywords stored against different ads, sum up the total score for each ad, the ads with the highest scores based on the user keywords given should be displayed first.. I havent a clue if there are 'official' ways of doing it, but that's the kind of thing I'd start looking at, anyhoo Matt. To the list: apologies for appended text, I cant get to google groups to post today :/ This email is confidential and may be privileged. If you are not the intended recipient please notify the sender immediately and delete the email from your computer. You should not copy the email, use it for any purpose or disclose its contents to any other person. Please note that any views or opinions presented in this email may be personal to the author and do not necessarily represent the views or opinions of Digica. It is the responsibility of the recipient to check this email for the presence of viruses. Digica accepts no liability for any damage caused by any virus transmitted by this email. UK: Phoenix House, Colliers Way, Nottingham, NG8 6AT UK Reception Tel: + 44 (0) 115 977 1177 Support Centre: 0845 607 7070 Fax: + 44 (0) 115 977 7000 http://www.digica.com SOUTH AFRICA: Building 3, Parc du Cap, Mispel Road, Bellville, 7535, South Africa Tel: + 27 (0) 21 957 4900 Fax: + 27 (0) 21 948 3135 http://www.digica.com -- http://mail.python.org/mailman/listinfo/python-list
Re: Newbie: datetime conversion question
Carsten Haese wrote: On Tue, 2006-10-17 at 08:49, hg wrote: import time %08X% (int)(time.mktime(time.localtime())) Have you not had your coffee yet or are you trying to win an obfuscated python programming competition? ;) -Carsten Just one cup hg -- http://mail.python.org/mailman/listinfo/python-list
Tertiary Operation
x = None result = (x is None and or str(x)) print result, type(result) --- OUTPUT --- None type 'str' y = 5 result = (y is 5 and it's five or it's not five) print result - OUTPUT - it's five ...what's wrong with the first operation I did with x? I was expecting result to be an empty string, not the str value of None. -- http://mail.python.org/mailman/listinfo/python-list
Re: COM Error -- Urgent help
This is the trae back ,can you help me please. Traceback (most recent call last): File C:\Documents and Settings\dzxbrn\Desktop\Stop Test\13 Oct\MainThread.py, line 13, in threadFunction obj.MyNavigate(dest) # this is gving an error. File C:\Documents and Settings\dzxbrn\Desktop\Stop Test\13 Oct\GenericFunctions.py, line 9, in MyNavigate ie.Navigate(dest) File C:\Python24\Lib\site-packages\win32com\client\dynamic.py, line 489, in __getattr__ raise AttributeError, %s.%s % (self._username_, attr) AttributeError: internetexplorer.application.Navigate None Fredrik Lundh wrote: Teja wrote: s=pythoncom.CoMarshalInterThreadInterfaceInStream(pythoncom.IID_IDispatch,ie) thread.start_new_thread(self.nav, (s,'www.google.com') I am getting an attribute error the traceback tells you what attribute Python was looking for, and may also provide additional clues. can you post the traceback too? make sure you include all of it. /F -- http://mail.python.org/mailman/listinfo/python-list
Re: Book about database application development?
Wolfgang Keller wrote: I know about the existence of MVC. But what I'm actually missing is a nice textbook that teaches how to actually implement it (and other design patterns which are useful for database applications) in a real-world application in a way that leads to non-ridiculous behaviour of the resulting application when it gets actually used. Maybe you would like Martin Fowler's Patterns of Enterprise Application Architecture http://martinfowler.com/books.html#eaa Preferrably using a language for the examples that's readable for someone who has learned programming ages ago with Pascal and is now using Python because he _hates_ everything that remotely ressembles to any mutation of C(++/#/Java). Examples are mostly Java and C#, sorry! Kent -- http://mail.python.org/mailman/listinfo/python-list
pylab package dependencies (was: Plotting histograms)
In article [EMAIL PROTECTED], Robert Kern [EMAIL PROTECTED] wrote: I presume what you did was something like this: from matplotlib import pylab [N,x] = hist(eig, 10) What you actually want is this: from matplotlib import pylab [N,x] = pylab.hist(eig, 10) Or, if you're at the interactive prompt (but remember that it is inadvisable to do so in modules): from matplotlib.pylab import * [N,x] = hist(eig, 10) You will probably want to review the section of the tutorial on importing modules if you don't understand the differences. Is pylab part of matplotlib? I always thought it was the other way around. I have a similar view of numpy as part of scipy. Maybe I'm confused on the dependencies. I find it confusing in the examples sometimes when the bigger package is imported (e.g. scipy) and then a subpackage is also imported. Like this: from scipi import * from scipi import numpy I know I've seen stuff like that, but I don't get it. The dependencies are confusing to me. I did a search of the tutorial on 'import' but didn't find the answer. -- Lou Pecora (my views are my own) REMOVE THIS to email me. -- http://mail.python.org/mailman/listinfo/python-list
Re: Tertiary Operation
abcd [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] x = None result = (x is None and or str(x)) ...what's wrong with the first operation I did with x? I was expecting result to be an empty string, not the str value of None. Your evil tertiary hack has failed you because the empty string counts as false in a boolean context. Please learn to love the new conditional expression syntax: http://docs.python.org/whatsnew/pep-308.html -- http://mail.python.org/mailman/listinfo/python-list
Re: Tertiary Operation
x = None
result = (x is None and or str(x))
print result, type(result)
---
OUTPUT
---
None type 'str'
y = 5
result = (y is 5 and it's five or it's not five)
print result
-
OUTPUT
-
it's five
...what's wrong with the first operation I did with x? I was expecting
result to be an empty string, not the str value of None.
An empty string evaluates to False, so it then continues to the
other branch. Either of the following should suffice:
# return a non-empty string
x is None and None or str(x)
# invert the logic and return
# something in the and portion
x is not None and str(x) or
There are more baroque ways of writing the terniary operator in
python (although I understand 2.5 or maybe python 3k should have
a true way of doing this). My understanding is that one common
solution is something like
{True: , False: str(x)}[x is None]
-tkc
--
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Re: Tertiary Operation
On Tue, 2006-10-17 at 09:30, abcd wrote: x = None result = (x is None and or str(x)) print result, type(result) --- OUTPUT --- None type 'str' The condition and result1 or result2 trick only works if result1 is an expression with a True boolean value. The empty string has a false boolean value. You could force result1 to have a true boolean value by sticking it into a list thusly: result = (x is None and [] or [str(x)])[0] But that's ugly. Use Python 2.5 where there is a true conditional expression or find another way to solve your problem. -Carsten -- http://mail.python.org/mailman/listinfo/python-list
Re: Max-plus library
Sébastien Boisgérault wrote: Robert Kern wrote: Martin Manns wrote: Hello, Is there any library that allows employing max-plus dioids in python (e.g. based on numpy/scipy)? Google says no and I haven't heard of any, so I imagine that there aren't. There might be something buried in some of the control theory packages, but as I neither know what max-plus dioids are, nor have I any current interest in them, I can't give you any better pointers. See http://cermics.enpc.fr/~cohen-g//SED/index-e.html for a two-page introduction to the field and its applications. Definitely worth a look IMHO. The second software you refer to (http://www-rocq.inria.fr/MaxplusOrg/soft.html) is a Scilab package but essentially made of C and Fortran files. Getting a working binding for Python may not be that hard ... Thank you for the fast replies. Since I currently have not the time to write bindings, I will probably have to stick to the Matlab implementation. Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: Newbie: datetime conversion question
Great stuff - many thanks hg wrote: Carsten Haese wrote: On Tue, 2006-10-17 at 08:49, hg wrote: import time %08X% (int)(time.mktime(time.localtime())) Have you not had your coffee yet or are you trying to win an obfuscated python programming competition? ;) -Carsten Just one cup hg -- http://mail.python.org/mailman/listinfo/python-list
Looking for assignement operator
Hello, is there a assignement operator, that i can overwrite? class MyInt: def __init__(self, val): assert(isinstance(val, int)) self._val = val a = MyInt(10) # Here i need to overwrite the assignement operator a = 12 Thanks Alexander -- http://mail.python.org/mailman/listinfo/python-list
How to invoke ipython in Mac OS X?
I installed the SciPy superpackage and have pylab, matplotlib, scipy, and numpy apparently running well. But I want to use matplotlib/pylab interactively. The instructions suggest doing this in IPython. But using ipython on the command line gives me an error. The system doesn't know the command. Apparently there is no ipython executable in one of the bin directories. I thought the superpackage would add that automatically, but I guess not. Can anyone tell me how to get ipython running on my MacOSX 10.4 system? Thanks for any help. (Yes, I asked on the SciPy email list, but never got an answer.) -- Lou Pecora (my views are my own) REMOVE THIS to email me. -- http://mail.python.org/mailman/listinfo/python-list
Re: Tertiary Operation
Carsten Haese wrote: Use Python 2.5 where there is a true conditional expression or find another way to solve your problem. python 2.5 once we upgrade (hopefully soon), anyways...an earlier post suggested the inverse... x = None result = (x is not None and str(x) or ) which works just fine. thanks. -- http://mail.python.org/mailman/listinfo/python-list
Re: Looking for assignement operator
On 10/17/06, Alexander Eisenhuth [EMAIL PROTECTED] wrote: Hello, is there a assignement operator, that i can overwrite? Soirry, no, assignment is a statement, not an operator, and can't be overridden. -- Cheers, Simon B [EMAIL PROTECTED] http://www.brunningonline.net/simon/blog/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Tertiary Operation
Tim Chase wrote:
{True: , False: str(x)}[x is None]
first the localtime/mktime roundtrip with a simulated cast, and now this? in
less
than one hour? solar flares?
/F
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Re: Looking for assignement operator
Alexander Eisenhuth wrote: is there a assignement operator, that i can overwrite? no. /F -- http://mail.python.org/mailman/listinfo/python-list
Re: Problem creating animated gif
abcd [EMAIL PROTECTED] wrote: Any ideas? Basically I want to make an animated GIF out of a bunch of images taken using the ImageGrab module. the screen is an RGB device, but the gifmaker wants palette images (mode P). to fix this, insert im = im.convert(P) after the grab (or before the call to makedelta). /F -- http://mail.python.org/mailman/listinfo/python-list
Problem creating animated gif
I am using gifmaker.py from PIL v1.1.5 on python 2.4.1. CODE import ImageGrab, gifmaker seq = [] while keepOnGoing: im = ImageGrab.grab() seq.append(im) fp = open(out.gif, wb) gifmaker.makedelta(fp, seq) fp.close() --- however I am getting this error: Exception in thread Thread-3: Traceback (most recent call last): File c:\Python24\lib\threading.py, line 442, in __bootstrap self.run() File c:\foo.py, line 10, in run gifmaker.makedelta(fp, seq) File c:\gifmaker.py, line 79, in makedelta for s in getheader(im) + getdata(im): File c:\Python24\Lib\site-packages\PIL\GifImagePlugin.py, line 383, in getdata ImageFile._save(im, fp, [(gif, (0,0)+im.size, 0, RAWMODE[im.mode])]) KeyError: 'RGB' Any ideas? Basically I want to make an animated GIF out of a bunch of images taken using the ImageGrab module. -- http://mail.python.org/mailman/listinfo/python-list
Return returns nothing in recursive function
Hallo people,
I have the following code that implements a simple recursive tree like
structure.
The trouble is with the GetTreeBranch function, the print statement
prints a valid value but the return immediatley afterward doesn't return
anything.
Can anyone help me with why?
Thanks,
Matt.
Code and output follow;
'''
dirtree
A simple implementation of a filesystem-like tree
datastructure.
'''
def MakeNewTree(rootname='root'):
'''MakeNewTree
Creates an empty tree with a 'root' node.
If the parameter rootname is not given, it
defaults to 'root'.
'''
return [{rootname:[]}]
def DoThingsToTree(path,value,tree,delete=False):
'''_DoThingsToTree
You should not use this function.
'''
if type(path)==type(''):
path=path.lstrip('/').rstrip('/').split('/')
for item in tree:
if type(item)==type({}) and item.has_key(path[0]):
if len(path)==1:
if not delete:
try:
item[path[0]].append(value)
except KeyError:
item[path[0]]=value
else:
if value is not None:
del(item[path[0]][value])
else:
del(tree[tree.index(item)])
break
else:
_DoThingsToTree(path[1:],value,item[path[0]],delete)
def GetTreeBranch(path,tree):
if type(path)==type(''):
path=path.lstrip('/').rstrip('/').split('/')
for item in tree:
if type(item)==type({}) and item.has_key(path[0]):
if len(path)==1:
print 'returning',tree[tree.index(item)]
return tree[tree.index(item)]
else:
GetTreeBranch(path[1:],item[path[0]])
def AddItemToTree(path,value,tree):
'''AddITemToTree
Add an item onto a 'branch' of the tree.
pathshould be a '/' separated string that
defines a path to the branch required.
value an object to put onto the branch
treethe tree to operate on.
'''
DoThingsToTree(path,value,tree)
def AddBranchToTree(path,branch,tree):
'''AddBranchToTree
Add a new branch to the tree.
pathshould be a '/' separated string that
defines a path to the branch required.
branch an object used as the branch identifier
(usually a string)
treethe tree to operate on
'''
DoThingsToTree(path,{branch:[]},tree)
def DelItemFromTree(path,index,tree):
'''DelItemFromTree
Remove an item from the tree.
pathshould be a '/' separated string that
defines a path to the branch required.
index the numeric index of the item to delete
on the branch to delete. items are indexed
in the order they are added, from 0
'''
DoThingsToTree(path,index,tree,delete=True)
def DelBranchFromTree(path,tree):
'''DelBranchFromTree
Remove a branch and all items and subbranches.
pathshould be a '/' separated string that
defines a path to the branch required.
treeThe tree to delete the branch from.
'''
DoThingsToTree(path,None,tree,delete=True)
OUTPUT;
from dirtree import *
MyTree=MakeNewTree('Matt')
AddBranchToTree('Matt','Good',MyTree)
AddBranchToTree('Matt','Bad',MyTree)
AddItemToTree('Matt/Good','Computers',MyTree)
AddItemToTree('Matt/Bad','Drinking',MyTree)
a=GetTreeBranch('Matt/Bad',MyTree)
returning {'Bad': ['Drinking']}
a
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Re: Tertiary Operation
On Tue, 2006-10-17 at 09:48, Tim Chase wrote:
[...]
Either of the following should suffice:
# return a non-empty string
x is None and None or str(x)
This one can be optimized to just str(x) since str(None)==None.
[...]
There are more baroque ways of writing the terniary operator in
python (although I understand 2.5 or maybe python 3k should have
a true way of doing this).
Python 2.5 does already.
My understanding is that one common
solution is something like
{True: , False: str(x)}[x is None]
As Fredrik pointed out in not so many words, this is not a good
solution. Besides being ugly, the major problem with this solution is
that both branches are evaluated regardless of the outcome of the
condition. This is not good if the expression is unsafe to calculate
under the wrong condition, or if the expressions are expensive to
calculate, or if the expressions have side effects.
The condition and result1 or result2 hack at least prevents the
evaluation of the non-applicable expression due to the short-circuiting
nature of the and and or operators.
-Carsten
--
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Re: Tertiary Operation
On Tue, 17 Oct 2006 06:30:32 -0700, abcd wrote: x = None result = (x is None and or str(x)) Boolean operators and and or stop as soon as a result is known. So: X and Y evaluates as X if X is false; otherwise it evaluates as Y. X or Y evaluates as X if X is true; otherwise it evaluates as Y. (x is None) evaluates as true, so (x is None and ) evaluates as . () evaluates as false, so ( or str(None)) evaluates as str(None). The important factor you missed is, I think, that the empty string is false in a boolean context. if '': ... print empty string evaluates as true ... else: ... print empty string evaluates as false ... empty string evaluates as false y = 5 result = (y is 5 and it's five or it's not five) (y is 5) evaluates as true, so (y is 5 and it's five) evaluates as it's five. it's five evaluates as true, so (it's five or it's not five) evaluates as it's five. Your basic logic is okay, but you shouldn't test equality with is. == tests for equality; is tests for object identity. In the case of None, it is a singleton; every reference to None refers to the same object. But integers like 5 aren't guaranteed to be singletons. In your case, you were lucky that, by a fluke of implementation, y is 5 was true. But watch: 1+4 is 5 True 10001 + 10004 == 10005 True 10001 + 10004 is 10005 False Always use == to test for equality, and (is) only to test for actual object identity (is this object the same as this one, not just two objects with the same value?). -- Steven. -- http://mail.python.org/mailman/listinfo/python-list
Re: Looking for assignement operator
Alexander Eisenhuth wrote: Hello, is there a assignement operator, that i can overwrite? You can't overwrite assignment operator, but you can overwrite methods of numeric objects: http://docs.python.org/ref/numeric-types.html HTH, Rob -- http://mail.python.org/mailman/listinfo/python-list
Re: Tertiary Operation
In article [EMAIL PROTECTED], abcd [EMAIL PROTECTED] wrote: Carsten Haese wrote: Use Python 2.5 where there is a true conditional expression or find another way to solve your problem. python 2.5 once we upgrade (hopefully soon), anyways...an earlier post suggested the inverse... x = None result = (x is not None and str(x) or ) which works just fine. thanks. Why not just: if x is None: result = str(x) else: result = It's a couple more lines of code, but it's obvious what it means. I know about boolean short-circuit evaluation, and the and/or trick, but I still look at result = (x is not None and str(x) or ) and have to puzzle through exactly what's going on there. You are going to write your code once. It's going to be read many many times by different people. It's worth a few more keystrokes on your part to save all those future maintenance programmers headaches later. You won't really understand just how important readability is until you're maintaining a million lines of old code, most of it written by people who are no longer on the project. I spend a lot of time staring at code somebody else wrote and muttering things like, What the does this do? That's just money down the toilet. If I have to reach for a reference manual to look up operator binding rules to understand a piece of code, that's bad. If I have to start making notes on a piece of scrap paper, Let's see, if x is this, then that's true, so blah, blah, that's bad. If I look at something subtle, don't realize it's subtle, and come to an incorrect conclusion about what it does, then base some other decisions on that incorrect conclusion, that's really, really bad. -- http://mail.python.org/mailman/listinfo/python-list
Re: Looking for assignement operator
Alexander Eisenhuth a écrit : Hello, is there a assignement operator, that i can overwrite? Adding to Simon Brunning reply (assignment is a statement). class MyInt: def __init__(self, val): assert(isinstance(val, int)) self._val = val a = MyInt(10) # Here i need to overwrite the assignement operator a = 12 Here you bind the 12 (Python int value) to name 'a', then 'a' has the int type, not your MyInt (which value has been lost). You may define a 'set' method, and write: a = MyInt(10) a.set(12) And, if a is a member of another class, you may define an accessor for that 'a' member in that class, which automatically call your set method when giving an int value. b.a = MyInt(10) b.a = 12--- b.a.set(12) A+ Laurent. -- http://mail.python.org/mailman/listinfo/python-list
Re: Format a number as currency! I can't find any help on this simple problem.
Hi, Bernard. Just tried the first 2 commands on win XP, Python 2.5 under Idle. An Error is raised: unsupported locale setting (lib/locale.py in setlocale, line 476). Actually I get the error also under Python 2.4.3 Any idea what I'm missing? Thanks in advance. Jürgen Bernard wrote: import locale locale.setlocale(locale.LC_ALL, 'English_United States.1252') 'English_United States.1252' conv = locale.localeconv() x = 1234567.8 locale.format(%d, x, grouping=True) '1,234,567' locale.format(%s%.*f, (conv['currency_symbol'], conv['int_frac_digits'], x), grouping=True) '$1,234,567.80' Hi Richards, This works for me. I agree it's a bit complicated compared to C# but it works. I'd put it in a function if I had to use it. Richard Kessler wrote: I am relatively new to Python. Love it, but I find things that I can do easily in .NET and cannot find a way to do in Python. I need to format a number as currency, for example 12343.56 to $12,343.56. In C# all I need to do is decimal x = 12343.56 then x.ToString($###,###.00); I cannot find a way to do this in Python. I must be missing something very simple here. I have tried the locale module but it will not put in the commas. I hope I do not have to write my own formatting routine...surely one is out there and I just can't find it. Running on XP Pro. Python 2.4.3. Thanks much in advance, Richard -- http://mail.python.org/mailman/listinfo/python-list
Re: Looking for assignement operator
On Tue, 17 Oct 2006 15:50:47 +0200, Alexander Eisenhuth wrote: Hello, is there a assignement operator, that i can overwrite? No. We were just discussing the reasons why Python will not and can not have an assignment operator just a few days ago. Check the archives for more details. class MyInt: def __init__(self, val): assert(isinstance(val, int)) isinstance() considered harmful: http://www.canonical.org/~kragen/isinstance/ self._val = val Seems kind of pointless. What does MyInt do that ordinary ints don't? Apart from slow your program down and require extra programming effort. a = MyInt(10) # Here i need to overwrite the assignement operator a = 12 Can't happen. a is just a name, not an object with methods that can be called. a can be bound to anything, not just MyInt instances. Objects like MyInt(10) can have no name, one name or many names: mylist = [0, MyInt(10), 20, 30] # MyInt instance has no name x = MyInt(10) # MyInt instance has one name x = y = z = MyInt(10) # MyInt instance has many names -- Steven. -- http://mail.python.org/mailman/listinfo/python-list
Re: Looking for assignement operator
On Oct 17, 8:50 am, Alexander Eisenhuth [EMAIL PROTECTED] wrote: Hello, is there a assignement operator, that i can overwrite? class MyInt: def __init__(self, val): assert(isinstance(val, int)) self._val = val a = MyInt(10) # Here i need to overwrite the assignement operator a = 12 Thanks Alexander I believe the property function is what you are looking for. e.g. class MyClass: def __init__(self, val): self.setval(val) def getval(self): return self._val def setval(self, val): assert(isinstance(val, int)) self._val = val _val = property(self.getval, self.setval) -- Jerry -- http://mail.python.org/mailman/listinfo/python-list
Re: Format a number as currency! I can't find any help on this simple problem.
Replace the conv function call with locale.localeconv. -- Jerry -- http://mail.python.org/mailman/listinfo/python-list
Re: Looking for assignement operator
Steven D'Aprano wrote:
On Tue, 17 Oct 2006 15:50:47 +0200, Alexander Eisenhuth wrote:
Hello,
is there a assignement operator, that i can overwrite?
No.
We were just discussing the reasons why Python will not and can not have
an assignment operator just a few days ago. Check the archives for more
details.
class MyInt:
def __init__(self, val):
assert(isinstance(val, int))
isinstance() considered harmful:
Trying to convert val to an int would probably be better indeed:
class MyInt(object):
def __init__(self, val):
self.val = int(val)
My 2 cents
--
bruno desthuilliers
python -c print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in '[EMAIL PROTECTED]'.split('@')])
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stdout not flushed before os.execvp()
Hi, I noticed, that sys.stout does not get flushed before the process is replaced. The last print statements (before execvp()) disappear. It only happens, if the output is redirected to a file (if sys.stdout is not line buffered). #testexec.py import os print Messsage os.execvp(/bin/true, [/bin/true]) === python tmp/testexec.py Messsage === python tmp/testexec.py out ; cat out Is this a bug or feature? My version: Python 2.4.2 (#1, May 2 2006, 08:28:01) GCC 4.1.0 (SUSE Linux)] on linux2 -- Thomas Güttler, http://www.thomas-guettler.de/ http://www.tbz-pariv.de/ E-Mail: guettli (*) thomas-guettler + de Spam Catcher: [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
Re: How to invoke ipython in Mac OS X?
Did you install it with the --install-scripts command line option? If you did, then there will be a ipython script located in the $INSTALL_SCRIPTS/bin directory. If you didn't, then I think the default location is /usr/lib/python or something like that. -- http://mail.python.org/mailman/listinfo/python-list
Re: Problem: Python search path - module order
aznach wrote: Hello! I have a shared hosting account at GrokThis.net and have a problem with the module order of the Python search path. I'd like to use django's svn trunk instead of the Django-0.95-py2.4.egg provided in site-packages. I use ~/.bash_profile to set: export PYTHONPATH=$HOME/local/lib/python:$HOME/django_src you can use sys.path.insert(0, ...) in the python code. -- Thomas Güttler, http://www.thomas-guettler.de/ http://www.tbz-pariv.de/ E-Mail: guettli (*) thomas-guettler + de Spam Catcher: [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
Re: How to invoke ipython in Mac OS X?
Lou Pecora wrote: I installed the SciPy superpackage and have pylab, matplotlib, scipy, and numpy apparently running well. But I want to use matplotlib/pylab interactively. The instructions suggest doing this in IPython. But using ipython on the command line gives me an error. The system doesn't know the command. Apparently there is no ipython executable in one of the bin directories. I thought the superpackage would add that automatically, but I guess not. Can anyone tell me how to get ipython running on my MacOSX 10.4 system? This is just a guess - but did you check your /Library/Frameworks/Python.framework/Versions/Current/bin (out of my head, but should be precise enough to get you there) directory for the ipython-binary? Usually, that will be the prefix of anything compiled/installed to framework-builds. So either you add that to your path, or create links to e.g. /usr/local/bin Diez -- http://mail.python.org/mailman/listinfo/python-list
Re: Looking for assignement operator
Jerry wrote:
(snip)
I believe the property function is what you are looking for.
It is not.
e.g.
class MyClass:
Descriptors don't work fine with old-style classes. Should be:
class MyClass(object):
def __init__(self, val):
self.setval(val)
def getval(self):
return self._val
def setval(self, val):
assert(isinstance(val, int))
self._val = val
_val = property(self.getval, self.setval)
NameError : self is not defined.
Should be :
_val = property(getval, setval)
but then - since setval() now calls _vals.__set__(), which itself calls
setval(), you have a nice infinite recursion (well, almost infinite -
hopefully, Python takes care of it).
May I kindly suggest that you learn more about properties and test your
code before posting ?-)
Anyway, even with the following correct code, this won't solve the OP's
question:
class MyClass(object):
def __init__(self, val):
self.val = val
def _getval(self):
return self._val
def _setval(self, val):
self._val = int(val)
val = property(_getval, _setval)
m = MyClass(42)
m
= __main__.MyClass object at 0x2ae5eaa00410
m.val
= 42
m = 42
m
= 42
type(m)
= type 'int'
--
bruno desthuilliers
python -c print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in '[EMAIL PROTECTED]'.split('@')])
--
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Re: urllib.urlopen: Errno socket error
Dennis,
I tried a ProxyHandler with the following code ...
proxy_support = urllib2.ProxyHandler({})
opener = urllib2.build_opener(proxy_support)
urllib2.install_opener(opener)
... but it's giving me the same result.
Then I tried to tunnel using code from ...
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/213238
... but it too gave me an error ...
Traceback (most recent call last):
File pyshell#7, line 1, in module
tunnel.run(tunnel_this)
File C:/Python25/My Python/PyTunnel.py, line 124, in run
Threads.append( thread_it(tid=0,proxy=self.get_proxy(),\
File C:/Python25/My Python/PyTunnel.py, line 81, in get_proxy
proxy.connect((self._phost,self._pport))
File string, line 1, in connect
gaierror: (11001, 'getaddrinfo failed')
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Re: Tertiary Operation
abcd a écrit : x = None result = (x is None and or str(x)) print result, type(result) --- OUTPUT --- None type 'str' y = 5 result = (y is 5 and it's five or it's not five) print result - OUTPUT - it's five ...what's wrong with the first operation I did with x? I was expecting result to be an empty string, not the str value of None. the condition and if_true or if_false is NOT a ternary operator but an ugly hack that breaks in some situations. It just happens that you stumbled on one of those situations : if_true must never evaluate as False. Please, do not use that ugly hack anymore and do a proper if block. Or use Python 2.5 with the official ternary operator ;) -- http://mail.python.org/mailman/listinfo/python-list
Re: Looking for assignement operator
Wow, thanks a lot for your quick answers. That assignement is no operator, but a statemant is a pity, but indeed I came foward with overwritten methods for numeric types Regards Alexander -- http://mail.python.org/mailman/listinfo/python-list
Re: Format a number as currency! I can't find any help on this simple problem.
jr wrote: import locale locale.setlocale(locale.LC_ALL, 'English_United States.1252') 'English_United States.1252' Just tried the first 2 commands on win XP, Python 2.5 under Idle. An Error is raised: unsupported locale setting (lib/locale.py in setlocale, line 476). Actually I get the error also under Python 2.4.3 Any idea what I'm missing? Let your machine decide locale.setlocale(locale.LC_ALL, ) 'de_DE.UTF-8' or try something less specific: locale.setlocale(locale.LC_ALL, en_US) 'en_US' Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: Tertiary Operation
abcd wrote:
x = None
result = (x is None and or str(x))
You don't need the parenthesis.
print result, type(result)
---
OUTPUT
---
None type 'str'
y = 5
result = (y is 5 and it's five or it's not five)
By all means *don't* use identity tests in such a context. Try with
10 instead of 5:
x = 10
x is 10
False
print result
-
OUTPUT
-
it's five
...what's wrong with the first operation I did with x? I was expecting
result to be an empty string, not the str value of None.
As other already pointed, an empty string (as well as an empty list,
tuple, dict, set IIRC, and zero int or float) evals to False in a
boolean context.
Python 2.5 has a ternary operator. If you need to deal with older Python
versions, another possible 'ternary op hack' is :
x = None
(str(x), )[x is None]
=
x = 42
(str(x), )[x is None]
= 42
This relies on the fact that False == 0 and True == 1.
NB : if you don't want to eval both terms before (which is how it should
be with a real ternanry operator), you can rewrite it like this:
result = (str, lambda obj:)[x is None)(x)
But this begins to be unreadable enough to be replaced by a good old
if/else...
--
bruno desthuilliers
python -c print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in '[EMAIL PROTECTED]'.split('@')])
--
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Re: How to invoke ipython in Mac OS X?
In article [EMAIL PROTECTED], Diez B. Roggisch [EMAIL PROTECTED] wrote: Lou Pecora wrote: I installed the SciPy superpackage and have pylab, matplotlib, scipy, and numpy apparently running well. But I want to use matplotlib/pylab interactively. The instructions suggest doing this in IPython. But using ipython on the command line gives me an error. The system doesn't know the command. Apparently there is no ipython executable in one of the bin directories. I thought the superpackage would add that automatically, but I guess not. Can anyone tell me how to get ipython running on my MacOSX 10.4 system? This is just a guess - but did you check your /Library/Frameworks/Python.framework/Versions/Current/bin Just checked it. Nothing there for IPython. directory for the ipython-binary? Usually, that will be the prefix of anything compiled/installed to framework-builds. So either you add that to your path, or create links to e.g. /usr/local/bin I'm not quite following this last suggestion. Can you explain more. Sorry. -- Lou Pecora (my views are my own) REMOVE THIS to email me. -- http://mail.python.org/mailman/listinfo/python-list
Re: OT: What's up with the starship?
[EMAIL PROTECTED] wrote: [EMAIL PROTECTED] wrote: [EMAIL PROTECTED] wrote: I don't think that would help in the case of Pywin32 since the Sourceforge dates for build 210 are 9/22. I emailed Mark Hammond but have not heard anything back yet. In the case of pywin32, are you at all sure that you actually downloaded anything from starship.python.net? AFAICT all the files are now hosted on sf, and there doesn't seem to be any vaguely new files in the backup of /home/www. The files I downloaded were from sourceforge. I don't know if starship.python.net hosts the source files or plays any role in building the disrtribution package. It may be that is all done elsewhere. But given starship.python.net's historical association with Pywin32, I am not going to just assume that. In email, Mark Hammond said that that the Pywin32 code is not hosted at starship.python.net, nor are the distributions built there. (I assume this does not apply to the very old win32all stuff that *is* at python.net but I doubt anyone uses those anymore.) -- http://mail.python.org/mailman/listinfo/python-list
Re: Tertiary Operation
abcd wrote: x = None result = (x is None and or str(x)) print result, type(result) --- OUTPUT --- None type 'str' [snip] ...what's wrong with the first operation I did with x? You weren't using Python 2.5: 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. x = None '' if x is None else str(x) '' Time to upgrade. ;-) Steve -- http://mail.python.org/mailman/listinfo/python-list
