Re: [OT] Awesome bug of the week

Haha! On 14 August 2014 14:54, Steven D'Aprano wrote: > Nothing to do with Python, but awesome: "OpenOffice won't print on > Tuesdays". > > https://bugs.launchpad.net/ubuntu/+source/cupsys/+bug/255161/comments/28 > > > > -- > Steven > -- > https://mail.python.org/mailman/listinfo/python-list >

Re: Functional vs. Object oriented API

Hi Max, In Python, we prefer readability over anything else. The simpler you can write it, the better it can be understood. That said, I've never considered using (i, j, k) as a vector component before. I've always done something akin to: >>> vector = Vector(2, 4, 6) >>> print (vector.normaliz

Re: how do you make a loop run in reverse?

There is a built-in function that reverses an iterable. Have a look at the documentation. xav On 27 March 2013 10:59, wrote: > So i have a set of for loops that create this : > > *** > *** *** *** *** *** *** *** > *** *** *** *** ***

Re: Recording live video stream from IP camera issue

Hi Sam, Did you compile your OpenCV with gstreamer? That's where I'd look first. Cheers, Xav On 18 February 2013 01:15, Sam Berry wrote: > Hi Xav, > > Iv been looking into OpenCV, i can easily stream my laptops webcam using > this code. > > import cv2 > > cv2.namedWindow("preview") > > vc =

Re: Recording live video stream from IP camera issue

On 7 February 2013 00:12, Sam Berry wrote: > Hi, > > This is for a university project. > > My issue is that i have built an App using pythons Kivy module, and i need > to be able to stream and record from an IP camera upon request. > > I have just used the VLC.exe to stream the video feed. But it

Fwd: Recording live video stream from IP camera issue

On 6 February 2013 23:12, Sam Berry wrote: > I have no vast knowledge of python, but i came across this code to capture > video from my IP camera > > This code works, however when i try to playback the .avi file in VLC > player... I've been working with several IP cameras with Python and OpenCV

Python 2 multiprocessing examples in docs.python.org

Hey all, I ran the example code on multiprocessing. On the "Pool example", an assertion failed with "testing garbage collection". Traceback (most recent call last): File "test.py", line 314, in test() File "test.py", line 295, in test assert not worker.is_alive() AssertionError The

Re: Help with Python/ArcPy

You can always try http://stackoverflow.com/search?q=ArcPY, or post your question there. Cheers, Xav On 13 December 2012 08:07, Michelle Couden wrote: > Does anyone know of a website or forum where there is help for ArcPY > (Python) programmers? ESRI’s (GIS) resource center Forums are very b

Re: Upgrading from 2.7 to 3.x

What operating system are you running? Cheers, Xav On 26 April 2012 13:08, deuteros wrote: > I'm fairly new to Python I have version 2.7 installed on my computer. > However > my professor wants us all to use the latest version of Python. How do I go > about upgrading? Do I just install the ne

Re: Comparing None and ints

Good to see Python3 got rid of that confusion :] Cheers, Xav On 17 January 2012 16:50, Chris Angelico wrote: > On Tue, Jan 17, 2012 at 5:47 PM, Xavier Ho wrote: > > What was the rationale behind this design? Specifically, (None < 0) == > True > > and

Comparing None and ints

Hello, I discovered this strange property by accident: Python 2.7.2 (default, Nov 21 2011, 17:25:27) [GCC 4.6.2] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> None < 0 True >>> None == 0 False >>> None > 0 False >>> int(None) Traceback (most recent call last

Re: Execute a command on remote machine in python

It sounds like Fabric is what you're after. We use it at work and it's the best thing since ssh. ;] http://docs.fabfile.org/en/1.3.2/index.html (Actually, it uses ssh internally and allows you to do remote shell-like programming in a pythonic fashion.) Cheers, Xav On 15 November 2011 22:04, R

Re: Fun python 3.2 one-liner

http://www.ideone.com/infch ^ Result of the below code On 29 March 2011 19:50, Raymond Hettinger wrote: > from collections import Counter > from itertools import product > > print('\n'.join('*'*(c//2000) for _,c in sorted(Counter(map(sum, > product(range(6), repeat=8))).items( > > > almost-n

Re: How do I get the email address of the person who clicked the link in the email?

As a suggestion, you can auto-format your email link so that the email of the user is sent as part of the URL GET argument. Cheers, Xav On 5 December 2010 08:15, Zeynel wrote: > Hello, > > I am working with Google App Engine python version. The app sends an > email to the user with a link to a

Re: Python OGL package

Also try Pyglet, in combination of PyOpenGL. Cheers, Xav On 17 November 2010 04:36, Marc-Andre Belzile < marc-andre.belz...@autodesk.com> wrote: > Hi list, > > > > could someone recommend a good python ogl package (open source is > preferred) ? I found these ones so far: > > > > http://pyopengl

C++ comment in Javadoc style -> reStructuredText compiler?

Hey all, Apologies if I am posting this in the wrong list. Does anyone know of a good compiler for javadoc comment style into reStructuredText, for Sphinx to chew? Cheers, Xavier -- http://mail.python.org/mailman/listinfo/python-list

Re: What people are using to access this mailing list

Gmail. -Xav On 3 November 2010 18:02, John Bond wrote: > Hope this isn't too O/T - I was just wondering how people read/send to this > mailing list, eg. normal email client, gmane, some other software or online > service? > > My normal inbox is getting unmanageable, and I think I need to find

Re: Pythonic way of saying 'at least one of a, b, or c is in some_list'

Not sure why you use the for-else syntax without a break or continue. And I'm also not sure on the readability. -Xav on his Froyo On 29/10/2010 6:21 PM, "HEK" wrote: > On Oct 28, 6:16 pm, "cbr...@cbrownsystems.com" > wrote: >> It's clear but tedious to write: >> >> if 'monday" in days_off or "tu

Re: Pythonic way of saying 'at least one of a, b, or c is in some_list'

On 29 October 2010 15:50, Paul Rubin wrote: > John Nagle writes: > >d1 = set('monday','tuesday') > >days_off = set('saturday','sunday') > >if not d1.isdisjoint(days_off) :... > >This is cheaper than intersection, since it doesn't have to > > allocate and construct a set. It just

Re: factorial of negative one (-1)

On 29 October 2010 14:41, Bj Raz wrote: > > Since Python can't call functions, I would like to know if there is a work > around. > Python can't call functions? I'm sorry, but I may have misunderstood what you are trying to say. I'm not familiar with the mathematical definition of factorial, but

Re: How on Factorial

On 29 October 2010 00:13, Dave Angel wrote: > From the help: > > "The unary ~ (invert) operator yields the bitwise inversion of its plain or > long integer argument. The bitwise inversion of x is defined as -(x+1). It > only applies to integral numbers" > > Inverting the bits of a floating point

Re: How on Factorial

On 28 October 2010 23:52, Dave Angel wrote: > The ~- trick only works on two's complement numbers. I've worked on > machines in the past that used one's complement, and this wouldn't work > there. > > DaveA > I imagine this wouldn't work on floating point numbers either. Cheers, Xav -- http:/

Re: 'NoneType' object has no attribute 'bind'

On 28 October 2010 20:24, Alex wrote: > hi there, I keep getting the message in the Topic field above. > > Here's my code: > > self.click2=Button(root,text="Click Me").grid(column=4,row=10) > self.click2.bind("",self.pop2pop) > what am I doing wrong? > Try self.click2=Button(root,text="Click Me

Re: How on Factorial

On 27 October 2010 18:27, Arnaud Delobelle wrote: > True. It's far too verbose. I'd go for something like: > >f=lambda n:n<=0 or n*f(~-n) > > I've saved a few precious keystrokes and used the very handy ~- idiom! > Huh, I've never seen that one before. Seems to work on both positive and ne

Re: programming

On 20 September 2010 17:29, Xavier Ho wrote: > Secondly, that doesn't even compile. Nor does > > xDistance=eval(input("Distance to the stop sign (in feet): ")) > Just correcting myself here. It compiles, but generates an error when you give it a number, which still f

Re: programming

Okay, it looks like you're doing well. I'm just going through your second email now, and it seems many of my comments in the first email is irrelavent to you anymore, because you already knew how to do it. =] Let's have a look. Again, my reply is in Blue. . *And what I've attempted to do so far.

Re: programming

Thanks Jordan. My reply will be in Blue. I apologise if this ever gets hard to read, but it's beginning to. On 20 September 2010 16:51, Jordan Blanton wrote: > "And so he started on a module that estimated the length of a sine wave. > Here is what he wrote: " > ok. what is a module? A Python

Re: programming

On 20 September 2010 16:38, Jordan Blanton wrote: > Honestly, if I knew what was being said, then yes. I posted the directions > to the project and what I've done so far but I have no idea if what I'm > doing is right at all. > > Jordan, correct me if I'm mistaken, but you didn't post the directi

Re: programming

On 20 September 2010 16:25, Jordan Blanton wrote: > its not specific terms that i dont understand. its general directions. but > when i dont understand one or two key points in a sentence, its hard to > understand what the directions are telling me to do. Is it possible for you to share the sen

Re: programming

On 20 September 2010 15:46, Jordan Blanton wrote: > I am in a computer science class in which I am supposed to be creating a > program involving a sine wave and some other functions. I understand the > concept of the problem, but I don't understand any of the "lingo" being > used. The directions

Re: Down with tinyurl! (was Re: importing excel data into a python matrix?)

On 20 September 2010 07:59, Ken Watford > wrote: > > Not that I disagree with you, but you might find this helpful: > http://tinyurl.com/preview.php > -- > http://mail.python.org/mailman/listinfo/python-list > I don't think the OP wants a preview feature. The fact that you still have to go throu

Re: Very stupid question about a % symbol

On 17 September 2010 12:48, Terry Reedy wrote: > Doubling an escape char, whatever it is, is a common convention: > >>> print("Print a {{}} format string line this: {{{}}}".format(2)) > Print a {} format string line this: {2} > Wow. That's convoluted. Took me a minute to process. Cheers, Xav --

Re: Very stupid question about a % symbol

On 17 September 2010 01:25, J wrote: > Is there a better way to print a '%' in the string when also using > formating? > I believe %% will escape the % and prints it straight out. Cheers, Xav -- http://mail.python.org/mailman/listinfo/python-list

Re: Current install methodolgy eggs?

On 13 September 2010 08:40, Ben Finney > wrote: > Paul Watson writes: > > > What is the currently favored installation process for Python > > applications? > > ‘python ./setup.py install’, using the standard library's Distutils > library. > I thought it was python setup.py install or ./setup

Re: mutate dictionary or list

On 7 September 2010 22:05, Baba wrote: > > It would be great if someone could give me a brief explanantion of the > mutation concept. > In this case, to mutate is to change. If you must not mutate the list, you must not change it. In another words, reading from the list is fine. Writing to it i

Re: Minimum and Maximum of a list containing floating point numbers

On 7 September 2010 10:56, MRAB wrote: > > > Incidentally, there's a builtin function called 'input' so using it as > a variable name is a discouraged! :-) Right-o! Cheers, Xav -- http://mail.python.org/mailman/listinfo/python-list

Re: Minimum and Maximum of a list containing floating point numbers

On 7 September 2010 10:37, ceycey wrote: > I have a list like ['1.1881', '1.1881', '1.1881', '1.1881', '1.1881', > '1.1881', '1.1881', '1.1881', '1.1881', '1.1881', '1.7689', '1.7689', > '3.4225', '7.7284', '10.24', '9.0601', '9.0601', '9.0601', '9.0601', > '9.0601']. > How can I convert the

Re: Dumb Stupid Question About List and String

2010/9/2 Alban Nona > Hello Xavier, working great ! thank you very much ! :p > Do you know by any chance if dictionnary can be sorted asthis: > Look at the sorted() global function in the Python API. ;] Cheers, Xav -- http://mail.python.org/mailman/listinfo/python-list

Re: Dumb Stupid Question About List and String

On 2 September 2010 02:49, Alban Nona wrote: > Well what Iam trying to generate is that kind of result: > > listn1=['ELM001_DIF', 'ELM001_SPC', 'ELM001_RFL', 'ELM001_SSS', > 'ELM001_REFR', 'ELM001_ALB', 'ELM001_AMB', 'ELM001_NRM', 'ELM001_MVE', > 'ELM001_DPF', 'ELM001_SDW', 'ELM001_MAT', 'ELM001_

Re: Dumb Stupid Question About List and String

On 2 September 2010 01:11, Alban Nona wrote: > Hello, > > seems to have the same error with python. > In fact I was coding within nuke, a 2d compositing software (not the best) > unfortunately, I dont see how I can use dictionnary to do what I would like > to do. > Hello Alban, The reason it's

Re: Dumb Stupid Question About List and String

On 2 September 2010 00:47, Alban Nona wrote: > Hello, > > So I figure out this night how to create automatically varibales via > vars(), the script seems to work, exept that where it should give me a list > like : > [ELM004_DIF,ELM004_SPC,ELM004_RFL,ELM004_SSS, ELM004_REFR, ELM004_ALB, > etc...]

Re: Dumb Stupid Question About List and String

On 1 September 2010 12:00, Alban Nona wrote: > @Xavier: ShaDoW, WorldPositionPoint (which is the same thing as > WordPointCloud passe) :) > Aha! That's what I was missing. Cheers, Xav -- http://mail.python.org/mailman/listinfo/python-list

Re: Dumb Stupid Question About List and String

On 1 September 2010 07:57, Alban Nona wrote: > listPass = ["DIF","SPC", "RFL", "SSS", "REFR", "ALB", "AMB", "NRM", "MVE", > "DPF", "SDW", "MAT", "WPP"] > Out of curiosity, could you briefly mention what "SDW" and "WPP" passes are? I've worked out the rest, and these two are riddling my brain. (

Re: meta-class troubles

Actually, scrape what I said. I think you need to have metaclass in the class statement, not just meta. -Xav On 31 August 2010 00:16, Xavier Ho wrote: > Ethan, are you trying to write the constructor in the class statement? > > Cheers, > Xav > > > On 31 August 2010 00:10

Re: meta-class troubles

Ethan, are you trying to write the constructor in the class statement? Cheers, Xav On 31 August 2010 00:10, Ethan Furman wrote: > Good Day! > > I am stuck... hopefully a few fresh pairs of eyes will spot what I am > missing. > > I have a metaclass, Traits, and two different testing files, test_

Re: palindrome iteration

One possible reason I can think of - "- exiting this loop means all compared chars were identical hence it is a palindrome and i return True" is probably incorrect reasoning. Think again. Also, you may consider posting your code in a way that preserves the whitespace characters. Cheers, Xav On

Re: Simple list problem that's defeating me!

On 23 June 2010 00:06, Neil Webster wrote: > Hi all, > > I've got a simple problem but it's defeated me and I was wondering if > somebody could point out where I'm going wrong or offer an alternative > solution to the problem? > > I have a list of lists such as [[a,2,3,4],[b,10,11,12], [a,2,3,4]]

Re: pythonize this!

On 15 June 2010 22:55, superpollo wrote: > Peter Otten ha scritto: > > superpollo wrote: >> >> goal (from e.c.m.): evaluate >>> 1^2+2^2+3^2-4^2-5^2+6^2+7^2+8^2-9^2-10^2+...-2010^2, where each three >>> consecutive + must be followed by two - (^ meaning ** in this context) >>> >> >> from iterto

Re: pythonize this!

On 15 June 2010 21:49, superpollo wrote: > goal (from e.c.m.): evaluate > 1^2+2^2+3^2-4^2-5^2+6^2+7^2+8^2-9^2-10^2+...-2010^2, where each three > consecutive + must be followed by two - (^ meaning ** in this context) > Obligatory one-liner: >>> sum((1, 1, 1, -1, -1)[(x-1) % 5] * x**2 for x in x

Re: a +b ?

2010/6/12 yanhua > hi,all！ > it's a simple question: > input two integers A and B in a line,output A+B? > > this is my program: > s = input() > t = s.split() > a = int(t[0]) > b = int(t[1]) > print(a+b) > > but i think it's too complex,can anybody tell to slove it with less code. > -- > The reas

Re: What does this PyChecker warning mean?

On 1 June 2010 21:48, Leo Breebaart wrote: > > When fed the following code: > > def Foo(): > >class A(object): >def __init__(self): >pass > >class B(object): >def __init__(self): >pass > > PyChecker 0.8.18 warns: > > foo.py:9: Redefining attribute

Re: Question about permutations (itertools)

> >>> list(combinations_with_replacement('01',3)) > ('0', '0', '0') > ('0', '0', '1') > ('0', '1', '1') > ('1', '1', '1') > > Is it possible to get combinations_with_replacement to return numbers > rather than strings? (see above) > >>> list(combinations_with_replacement(range(0,2), 3)) [(0, 0, 0)

Re: reading help() - newbie question

On 31 May 2010 20:19, Payal wrote: > Hi, > I am trying to learn Python (again) and have some basic doubts which I > hope someone in the list can address. (English is not my first language and > I > have no CS background except I can write decent shell scripts) > > Welcome (back) to the Python-Lis

Re: Creating a single list

> # Insert into the list with slicing syntax. >column_title_list[2:3} = getproduct() > Sorry, that should have been [2:3]. Typing a bit too fast. -Xav -- http://mail.python.org/mailman/listinfo/python-list

Re: Creating a single list

On 29 May 2010 23:24, Astley Le Jasper wrote: > def createlist(): >column_title_list = ( >("id",20,"integer"), >("companyname",50,"text"), >getproducts(), >

Re: A Friday Python Programming Pearl: random sampling

On 29 May 2010 06:44, Mark Dickinson wrote: > But I was struck by its beauty and > simplicity, and thought it deserved to be better known. > Wow, that took me at least 2 minutes to see its beauty as well. Nice find, Mark. Thanks for sharing. (Also, it's nice to see another SOer on Python-List a

Re: if, continuation and indentation

On 27 May 2010 23:26, Xavier Ho wrote: > Oh, one minor optimisation. You can put the last condition first > I take that back. You really can't, without using more parans or ifs. Apologies. -Xav -- http://mail.python.org/mailman/listinfo/python-list

Re: if, continuation and indentation

On 27 May 2010 22:57, Jean-Michel Pichavant wrote: > One possible solution >> >> if ( >> width == 0 and >> height == 0 and >> color == 'red' and >> emphasis == 'strong' or >> highlight > 100 >> ): >> raise ValueError("sorry, you lose

Re: if, continuation and indentation

On 27 May 2010 22:57, Jean-Michel Pichavant wrote: > One possible solution > > if ( > width == 0 and > height == 0 and > color == 'red' and > emphasis == 'strong' or > highlight > 100 > ): > raise ValueError("sorry, you lose") > > But

Re: if, continuation and indentation

On 27 May 2010 22:22, HH wrote: >if (width == 0 and >height == 0 and >color == 'red' and >emphasis == 'strong' or >highlight > 100): >raise ValueError("sorry, you lose") > I've gotta say - I've bumped into this problem before, and I'm sure many other h

Re: where are the program that are written in python?

On Sun, May 23, 2010 at 3:35 PM, sturlamolden wrote: > Yes I know about PyOpenGL, but then there is the speed argument: From > C I can make epeated calls to functions like glVertex4f with minial > loss of efficacy. Calling glVertex4f from Python (e.g. PyOpenGL) would > give me the Python (and pos

Re: where are the program that are written in python?

On Fri, May 21, 2010 at 9:12 PM, Deep_Feelings wrote: > thankx for reply. > > from that list i have a feeling that python is acting only as "quick > and dirty work" nothing more ! > You might have just offended a lot of people on the list here Cheers, Xav -- http://mail.python.org/mailman

Re: __str__ for each function in a class

On 5/19/2010 1:14 AM, Vincent Davis wrote: > class C(object): >> def __init__(self, new): >> self.letter = dict(a=1,b=2,c=3, amin=np.amin) >> self.new = new >> self._x = None >> self._Y = None >> >> @property >> def x(self): >> """I'm the 'x' property.""

Re: help need to write a python spell checker

Yeah, most unis here commence in March, and the first semester usually finish in June, when the exams are. - Xav on his 'droid On 19/05/2010 2:21 PM, "Patrick Maupin" wrote: On May 14, 3:19 am, "harry k" wrote: > Write a spell checking tool that wil... Well, this has been educational. Both m

Re: Human word reader

On Sat, May 15, 2010 at 9:32 PM, timo verbeek wrote: > On May 15, 1:02 pm, timo verbeek wrote: > Place starts always with for > Okay, much better. Given that constraint, it looks like regular expression can do the job. I'm not very experienced with regex, though. \w* matches a whole word compo

Re: Human word reader

On Sat, May 15, 2010 at 9:12 PM, Xavier Ho wrote: > You need to have a very, very good set of heruistics and deterministic > functions to do that. > > "How do I get the position of a known word in a string if the length if > unknown?" > And this is what I get f

Re: Human word reader

On Sat, May 15, 2010 at 9:02 PM, timo verbeek wrote: > I'm planning to create a human word program > > > I need help with getting the useful information how do I get the place > if I don't now how long the string is? > > Boy, that is a very hard problem. Are the inputs restricted to anything? E

Re: help need to write a python spell checker

1) Welcome to Python-List! 2) Python-list doesn't like to do other people's homework. 3) What have you tried? Cheers, Xav On Fri, May 14, 2010 at 6:19 PM, harry k wrote: > Write a spell checking tool that will identify all misspelled word in a > text file using a provided dictionary. > > > Th

Re: Extract all words that begin with x

Have I missed something, or wouldn't this work just as well: >>> list_of_strings = ['2', 'awes', '3465sdg', 'dbsdf', 'asdgas'] >>> [word for word in list_of_strings if word[0] == 'a'] ['awes', 'asdgas'] Cheers, Xav On Mon, May 10, 2010 at 6:40 PM, Jimbo wrote: > Hello > > I am trying to find

Re: solve a newspaper quiz

On Sun, May 9, 2010 at 7:20 PM, superpollo wrote: > "if a b c are digits, solve ab:c=a*c+b" > Sorry, what does the notation ab:c mean? Cheers, Xav -- http://mail.python.org/mailman/listinfo/python-list

Re: can we change the variables with function

On Sun, May 9, 2010 at 6:19 PM, gopi krishna wrote: > Hi >can I change the variable in a function using the function > suppose > >>>def a(): > x=20 > can we change the variable using the function > Can you give us an example of how you'd like to "change the variable", in code, and show us wha

Re: Why list comprehension faster than for loop?

On Sun, May 9, 2010 at 6:20 PM, gopi krishna wrote: > Why list comprehension faster than for loop? > > Because Python optimises for certain special cases, when the number of iterations is predicable in a list comprehension. Cheers, Xav -- http://mail.python.org/mailman/listinfo/python-list

Re: [Python-ideas] division oddness

On Fri, May 7, 2010 at 12:14 PM, Chris Rebert wrote: > Personally, I find the following the most unintuitive: > divmod(-11, 3) == (-4, 1) > > So, we overshoot -11 and then add 1 to go back to the right place? > That violates my intuitive thought that abs((n//d)*d) <= abs(n) ought to > hold. > Ha

Re: [Python-ideas] division oddness

On Fri, May 7, 2010 at 11:13 AM, Chris Rebert wrote: > On Thu, May 6, 2010 at 5:43 PM, Mathias Panzenböck > wrote: > > Shouldn't by mathematical definition -x // y be the same as -(x // y)? > > I think this rather odd. Is there any deeper reason to this behaviour? I > > guess changing this will

Re: column selection

You need to ignore empty lines. for line in open('1.txt'): if len(line.strip()) == 0: continue columns = line.split() print columns[0], columns[2] Cheers, Xav On Thu, May 6, 2010 at 6:22 PM, mannu jha wrote: > Hi, > > I have few files like this: > > 24 ALA helix (helix_alph

Re: dynamic function add to an instance of a class

On Thu, Apr 29, 2010 at 5:55 PM, Richard Lamboj wrote: > > Hello, > > i want to add functions to an instance of a class at runtime. The added > function should contain a default parameter value. The function name and > function default paramter values should be set dynamical. > > Kind Regards, > >

Re: How to check what is holding reference to object

Michal, May I ask why do you care about the object's management? Let Python worry about that. What's your use case? -- http://mail.python.org/mailman/listinfo/python-list

Re: Engineering numerical format PEP discussion

On Mon, Apr 26, 2010 at 3:39 PM, Chris Rebert wrote: > "The conversion **exactly follows the rules for conversion to > scientific numeric string** except in the case of finite numbers > **where exponential notation is used.**" > Well, then maybe the conversion doesn't exactly follow the rules, i

Re: Engineering numerical format PEP discussion

On Mon, Apr 26, 2010 at 3:19 PM, Chris Rebert wrote: > Apparently either you and the General Decimal Arithmetic spec differ > on what constitutes engineering notation, there's a bug in the Python > decimal library, or you're hitting some obscure part of the spec's > definition. I don't have the e

Re: Hi, friends. I wanna ask if there is a function which is able to take a list as argument and then return its top-k maximums?

On Fri, Apr 23, 2010 at 12:23 AM, D'Arcy J.M. Cain wrote: > Now try returning the top two or four numbers. > >>> numbers = [1, 4, 5, 3, 7, 8] >>> sorted(numbers)[-2:] [7, 8] >>> sorted(numbers)[-4:] [4, 5, 7, 8] I see what you mean. This is not as intuitive, is it? Cheers, Xav -- http://mail

Re: Hi, friends. I wanna ask if there is a function which is able to take a list as argument and then return its top-k maximums?

On Fri, Apr 23, 2010 at 12:04 AM, Tim Golden wrote: > Assuming top-k doesn't mean something obscurely statistical: > > l = [1,2, 3, 4, 5] > k = 3 > print (sorted (l, reverse=True)[:k]) > You don't really need to reverse sort there: >>> numbers = [1, 4, 5, 3, 7, 8] >>> sorted(numbers)[3:] [5, 7,

Re: Re: Code redundancy

On Wed, Apr 21, 2010 at 7:59 AM, Alan Harris-Reid < aharrisr...@googlemail.com> wrote: > The code is not usually in class.__init__ (otherwise I would have used the > self. prefix) Alan, if your variables are not usually in __init__, what's preventing you from using class variables like this: >>

Re: problems creating and adding class instances to a list:

On Tue, Apr 20, 2010 at 7:38 AM, Chris Rebert wrote: > Additionally, `self.x = int` might not do what you thought it does. It > does *not* create a new instance variable of type 'int'. Instead, it > literally assigns to a new instance variable x the *function*† that > converts values into integer

Re: problems creating and adding class instances to a list:

On Tue, Apr 20, 2010 at 7:21 AM, Robert Somerville < rsomervi...@sjgeophysics.com> wrote: > class ctest(): > x = int > y = [1,2,3] > Variables defined directly under the class are known as "static variables" in many other languages. Here in Python it's called a class variable, but they're sti

Re: Default paranmeter for packed values

On Mon, Apr 19, 2010 at 9:46 AM, Chris Rebert wrote: > It doesn't really make sense to use * in such situations anyway, you > can just do the normal `z = (1,2,3)` But calling function(1.0, (0.0, 1.0, 0.0)) has been a big pet peeve of mine, and it looks extremely ugly and, imo, unpythonic. On M

Default paranmeter for packed values

uot;", line 1 def t(a, *b = (3, 4)): ^ SyntaxError: invalid syntax What was the rationale behind this design? Cheers, Ching-Yun Xavier Ho, Technical Artist Contact Information Mobile: (+61) 04 3335 4748 Skype ID: SpaXe85 Email: cont...@xavierho.com Website: http://xavierho.com/ -

Re: Calling a class method

On Sat, Apr 17, 2010 at 11:09 PM, vsoler wrote: > I have the following script: > > class TTT(object): >def duplica(self): >self.data *= 2 >def __init__(self, data): >self.data = data >TTT.duplica(self.data) > You're calling duplica with the class, and not by its o

Re: curious about python version numbers

Hi Alex, It's because Python 3.x introduced a lot of backwards incompatibilities. Python 2.7 aims to bridge that gap, so many 3rd party libraries that depend on Python 2.x can transit onto Python 3.x better, as I understand. Cheers, Xav On Mon, Apr 12, 2010 at 12:52 PM, Alex Hall wrote: > Hi

Re: Python does not allow a variable named "pass"

On Sun, Apr 11, 2010 at 11:40 PM, BJ Swope wrote: > Other than asking the website owner to change the name of the field > how can I go about passing that field in the form post? > How about: >>> urllib.urlencode({'pass' : 'foo'}) And so on? What is your problem in this context? Cheers, Xav --

Re: pass object or use self.object?

On Wed, Apr 7, 2010 at 1:19 AM, Jean-Michel Pichavant < jeanmic...@sequans.com> wrote: > Usually, when using classes as namespace, functions are declared as static > (or as classmethod if required). > e.g. > > > class Foo: > @classmethod > def process(cls, document): > print 'process of'

Re: pass object or use self.object?

> So my question is whether it's bad practice to set things up so each > method operates on self.document or should I pass document around from > one function to the next? > I think this depends on the use case. If the functions you're calling in between have a chance to be called independently,

Re: sum for sequences?

On Tue, Apr 6, 2010 at 11:39 PM, Albert van der Horst < alb...@spenarnc.xs4all.nl> wrote: > Now for floating point numbers the order of summation is crucial, > not commutative (a+b)+c <> a+(b+c). > Could you shed some light on why is this? Cheers, Xav -- http://mail.python.org/mailman/listinfo

Re: pythonrag

Python caches objects for reuse, but I'm not too certain on how it works, either. Seems a bit odd. I just tested on 2.6.5 and got the same result. This hasn't been a problem for me, though. Cheers, Xav -- http://mail.python.org/mailman/listinfo/python-list

Re: Splitting a string

output[-1]) ... output.append('') ... output[-1] += character ... return tuple(output) ... >>> split_number('si_pos_99_rep_1_0.ita') ('si_pos_', 99, '_rep_', 1, '_', 0, '.ita') Cheers, Xav On Fri, Apr 2, 2010 at 8:26 PM,

Re: Hey Sci.Math, Musatov here. I know I've posted a lot of weird stuff trying to figure things out, but I really think I am onto something here and need some bright minds to have a look at this, co

On Fri, Apr 2, 2010 at 8:14 PM, A Serious Moment wrote: > SPARSE COMPLETE SETS FOR NP: > SOLUTION OF A CONJECTURE > BY MARTIN MICHAEL MUSATOV * > > for llP: > > Sparse Comp1ete Sets > Solution of a Conjecture > Hi, If you're serious about this posting, could you please: 1) Provide a link to a P

Re: Splitting a string

Best I can come up with: >>> def split_number(string): ... output = [string[0]] ... for character in string[1:]: ... if character.isdigit() != output[-1].isdigit(): ... output.append('') ... output[-1] += character ... return tuple(output) ... >>> split_numb

Re: pynotify for python 3.1.. Help Please..

On Fri, Apr 2, 2010 at 8:13 PM, Xavier Ho wrote: > Hi Jebamnana, > Jebagnana* Sorry. -Xav -- http://mail.python.org/mailman/listinfo/python-list

Re: pynotify for python 3.1.. Help Please..

Hi Jebamnana, You'll probably have to copy the pynotify contents to the Python 3.1 folder. (under Libs\site-packages). You should be able to find the folder in the Python 2.6 paths. Once you do that, you can try to use it. But I don't know if pynotify will be able to run with Python 3.1. For inst

Re: PyGame migrating to JavaScript

On Fri, Apr 2, 2010 at 6:19 PM, Gary Herron wrote: > It's a joke -- see > http://en.wikipedia.org/wiki/April_Fools%27_Da D'oh! Can't believe that got me. (It's already 2nd of April... you're not supposed to make that joke now! =p) Cheers, Xav

Re: PyGame migrating to JavaScript

Javascript in recent years has been getting better and better, and > now is a way better language than python. So to keep up with the > times pygame has been rewritten for javascript. > *shudders* Can someone convince me why that is a good idea at all? Any rationales? Cheers, -Xav -- http:/

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