Re: easy question, how to double a variable
def twice(parameter = 2) return 4 2009/9/20 daggerdvm dagger...@yahoo.com: Write the definition of a function twice , that receives an int parameter and returns an int that is twice the value of the parameter. how can i do this -- http://mail.python.org/mailman/listinfo/python-list -- http://www.kiloday.com http://www.fourstopspast.com -- http://mail.python.org/mailman/listinfo/python-list
Re: easy question, how to double a variable
In article fa454992-d61a-4fb7-b684-c8535bce5...@e18g2000vbe.googlegroups.com, daggerdvm dagger...@yahoo.com wrote: you brain needs error checking! Whose brain? At least I know this: Your brain is beyond repair. Go for a brain transplant. Groetjes Albert -- -- Albert van der Horst, UTRECHT,THE NETHERLANDS Economic growth -- being exponential -- ultimately falters. alb...@spearc.xs4all.nl =n http://home.hccnet.nl/a.w.m.van.der.horst -- http://mail.python.org/mailman/listinfo/python-list
Re: easy question, how to double a variable
I come from a scientific background, so my approach to the solution of this problem is a little different. It makes use of some numerical approximations, but that's not necessarily a bad thing, because it helps avoid singularities. So it could be a little more robust than other solutions presented here. It also has a little more functionality: Say you wanted to return three times a variable, you wouldnt want to write another function to do that for you, so now you just pass in how many times you want the variable repeated as the first parameter. Hope this helps! Cheers! import math def repeat(how_many_times, x): def f(n): return 1./(2**n) def summation(func, howmany): if howmany == 1: return func(1) else: return func(howmany) + summation(func, howmany-1) def eulerify(num): return abs(math.cos(math.pi) + 1j*(math.sin(math.pi))) * num def get_coefficient(multiplier): return eulerify(multiplier * summation(f, 100)) return int(eulerify(get_coefficient(how_many_times) * x)) On Fri, Oct 2, 2009 at 2:08 PM, Albert van der Horst alb...@spenarnc.xs4all.nl wrote: In article fa454992-d61a-4fb7-b684-c8535bce5...@e18g2000vbe.googlegroups.com, daggerdvm dagger...@yahoo.com wrote: you brain needs error checking! Whose brain? At least I know this: Your brain is beyond repair. Go for a brain transplant. Groetjes Albert -- -- Albert van der Horst, UTRECHT,THE NETHERLANDS Economic growth -- being exponential -- ultimately falters. alb...@spearc.xs4all.nl =n http://home.hccnet.nl/a.w.m.van.der.horst -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: easy question, how to double a variable
On Sep 23, 7:36 pm, David C Ullrich dullr...@sprynet.com wrote: On Tue, 22 Sep 2009 02:34:53 +, Steven D'Aprano wrote: On Mon, 21 Sep 2009 13:50:23 -0500, David C Ullrich wrote: But you actually want to return twice the value. I don't see how to do that. What? Seriously? You're saying it _can_ be done in Python? They must have added something to the standard library again. I mean how can you return twice a value without a twice function to start with? I've tried. You'd think def twice(n): return twice(n) would work, but I get this really long error message. You're not just yanking the OP's chain??? That would be cruel. I mean the guy has enough problems already... Sorry, there is no 'twice' builtin. I think what you are looking for is: def twice(n): return return n Iain -- http://mail.python.org/mailman/listinfo/python-list
Re: easy question, how to double a variable
On Sep 24, 5:51 am, Iain King iaink...@gmail.com wrote: On Sep 23, 7:36 pm, David C Ullrich dullr...@sprynet.com wrote: On Tue, 22 Sep 2009 02:34:53 +, Steven D'Aprano wrote: On Mon, 21 Sep 2009 13:50:23 -0500, David C Ullrich wrote: But you actually want to return twice the value. I don't see how to do that. What? Seriously? You're saying it _can_ be done in Python? They must have added something to the standard library again. I mean how can you return twice a value without a twice function to start with? I've tried. You'd think def twice(n): return twice(n) would work, but I get this really long error message. You're not just yanking the OP's chain??? That would be cruel. I mean the guy has enough problems already... Sorry, there is no 'twice' builtin. I think what you are looking for is: def twice(n): return return n Iain Actually, what he wants is: (def twice (x) (+ (once x) (once x))) -- http://mail.python.org/mailman/listinfo/python-list
Re: easy question, how to double a variable
On 9月22日, 上午4时49分, daggerdvm dagger...@yahoo.com wrote: you brain needs error checking! this kid knows error checking...may be he know exceptions as well -- http://mail.python.org/mailman/listinfo/python-list
Re: easy question, how to double a variable
On Mon, 21 Sep 2009 21:49:50 +0100, daggerdvm dagger...@yahoo.com wrote: you brain needs error checking! Your post, by contrast, needs grammar checking. -- Rhodri James *-* Wildebeest Herder to the Masses -- http://mail.python.org/mailman/listinfo/python-list
Re: easy question, how to double a variable
On Tue, 22 Sep 2009 07:41:11 -0700, Hyuga wrote: Forget ethical. We can do his homework for him, we can perhaps pass exams for him, maybe graduate for him, and then with our luck, he'll get a job in our office and we get to do his work for him. No, no, no. The plan is to do his homework for him so that he's incompetent when he graduates and won't be competition for the rest of us who did do our homework. Well, while they may not be as much competition come promotion time, I think Mr. Finney had it right that these people *do* still somehow get hired ... It was Mel Wilson, not Ben Finney, who write the paragraph starting with Forget ethical. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: easy question, how to double a variable
On Sep 22, 9:57 am, Grant Edwards inva...@invalid.invalid wrote: No, no, no. The plan is to do his homework for him so that he's incompetent when he graduates and won't be competition for the rest of us who did do our homework. Don't forget the Peter principal --- we might end up working for him! Btw, I can't believe nobody provided the simplest literal solution: def twice(i): return i, i -- http://mail.python.org/mailman/listinfo/python-list
Re: easy question, how to double a variable
On Sep 23, 2009, at 8:15 , Casey Webster wrote: Btw, I can't believe nobody provided the simplest literal solution: def twice(i): return i, i -- or this one, which is possibly even more literal: def twice(p): return an int that is twice the value of the parameter twice(an int parameter) -- Brian Blais bbl...@bryant.edu http://web.bryant.edu/~bblais -- http://mail.python.org/mailman/listinfo/python-list
Re: easy question, how to double a variable
On Tue, 22 Sep 2009 02:34:53 +, Steven D'Aprano wrote: On Mon, 21 Sep 2009 13:50:23 -0500, David C Ullrich wrote: But you actually want to return twice the value. I don't see how to do that. What? Seriously? You're saying it _can_ be done in Python? They must have added something to the standard library again. I mean how can you return twice a value without a twice function to start with? I've tried. You'd think def twice(n): return twice(n) would work, but I get this really long error message. You're not just yanking the OP's chain??? That would be cruel. I mean the guy has enough problems already... -- http://mail.python.org/mailman/listinfo/python-list
Re: easy question, how to double a variable
On Sep 20, 10:27 pm, daggerdvm dagger...@yahoo.com wrote: Write the definition of a function twice , that receives an int parameter and returns an int that is twice the value of the parameter. how can i do this I will stop this theatre... as you should know, you want your function to make arithmetic operation n*2. Everything you have to do is to define some function with parameter n and make this function to return n*2. If you are not jerk, you can make the whole code you need from the previous sentence :))) -- http://mail.python.org/mailman/listinfo/python-list
Re: easy question, how to double a variable
On Monday, 21 September 2009 22:50:31 daggerdvm wrote: carl banks.you are a dork No mister_do_my_homework, he is not. He is actually a respected member of this little community. You, however, are beginning to look like one. Why do you not come clean - tell us what you are doing, show us what you have tried, and maybe, just maybe, some kind soul will help you, instead of mocking you. Although that is now less likely as you have started calling people derogatory names. And if you do not at least do what I have suggested, there is about a snowball's hope in hell of anybody helping you, as you come across as a parasite who wants other people to do his work. Prove you are not, or go away. - Hendrik -- http://mail.python.org/mailman/listinfo/python-list
Re: easy question, how to double a variable
daggerdvm wrote: what are you retarded? this is not a test you moron, i can ask all the questions i want about it. You seem to have forgotten to CC the list. Let me help show the world your mad skillz -- at replying, at programming, at orthography, at interpersonal communication... Sure you can ask all the questions you want...and the newsgroup can give all the answers it sees fit. In all likelihood, your professor wanted *you* to solve the problem, not have comp.lang.python solve the problem for you. You got at least two answers that solve the problem, but were designed to clearly indicated to the professor that you didn't author them yourself. From my experience teaching students to program, that's the sort of problem that 4th or 5th graders (who have been paying attention in class) should be able to do with no need to ask for help. Given that you made *no* effort (your post had *zero* code to show you had even attempted the problem), you got back far more than you put in. -tkc -- http://mail.python.org/mailman/listinfo/python-list
Re: easy question, how to double a variable
you brain needs error checking! -- http://mail.python.org/mailman/listinfo/python-list
Re: easy question, how to double a variable
On Mon, 21 Sep 2009 13:46:31 -0700 (PDT) daggerdvm dagger...@yahoo.com wrote: u don't want to answerthen why post?...get lost. You're not doing yourself a favor with this attitude, much less displaying it. You asked a question that you could have solved with 1 hour's worth of reading at most (much less if you're actually attending some sort of class for this). I'm not saying you deserve to be mocked, but it is a fact of life that you get these responses when it is apparent that you put almost no effort into this problem. Here's a tip: post to the group your code that you came up with yourself and explain what gives you trouble. I assure you, the responses will be more helpful that way. /W -- INVALID? DE! -- http://mail.python.org/mailman/listinfo/python-list
Re: easy question, how to double a variable
On Monday 21 September 2009 22:49:50 daggerdvm wrote: you brain needs error checking! try: return response() except Troll,e: raise dontFeed(anymore=True) \d -- home: http://otherwise.relics.co.za/ 2D vector animation : https://savannah.nongnu.org/projects/things/ Font manager : https://savannah.nongnu.org/projects/fontypython/ -- http://mail.python.org/mailman/listinfo/python-list
Re: easy question, how to double a variable
On Sep 21, 1:27 am, daggerdvm dagger...@yahoo.com wrote: Write the definition of a function twice , that receives an int parameter and returns an int that is twice the value of the parameter. how can i do this Please note that most mails here are humorous - as should be expected for a language named after Monty Python. So, please do not get angry and do take it the way it was intended. The main problem that everybody sees is that the code you asked is extremely simple. This causes others to think that you have not invested any time in getting a solution yourself. Most of us here are 30 years old, and we know from experience that if one does not invest time and energy in solving issues when we are young, it eventually leads us to a very unrewarding and unhappy life in the end. So, even though it looks to you that people are mocking you, it is not exactly the case. If you do try to get a solution and is unable to do so, then I am 100% sure that many many people would have provided you the answer or the way to do so. Also, since you are young (presumably), it would be good to understand that if you get it into a flamewar (email or in life), it tends to end bad for you in the end. Esp, MRAB, Carl Banks, Steven D'Aprano, Tim Chase etc , whom you flamed, are amongst the most respected people in this group. -- http://mail.python.org/mailman/listinfo/python-list
Re: easy question, how to double a variable
Tim Roberts wrote: daggerdvm dagger...@yahoo.com wrote: carl banks.you are a dork What are you, eleven years old? Look, you asked us to answer for you what is CLEARLY a homework question. It is unethical for you to ask that, and it is unethical for us to answer it. Forget ethical. We can do his homework for him, we can perhaps pass exams for him, maybe graduate for him, and then with our luck, he'll get a job in our office and we get to do his work for him. Mel. -- http://mail.python.org/mailman/listinfo/python-list
Re: easy question, how to double a variable
Mel mwil...@the-wire.com writes: Tim Roberts wrote: Look, you asked us to answer for you what is CLEARLY a homework question. It is unethical for you to ask that, and it is unethical for us to answer it. Forget ethical. We can do his homework for him, we can perhaps pass exams for him, maybe graduate for him, and then with our luck, he'll get a job in our office and we get to do his work for him. +1 QOTW -- \ “Special today: no ice cream.” —mountain inn, Switzerland | `\ | _o__) | Ben Finney -- http://mail.python.org/mailman/listinfo/python-list
Re: easy question, how to double a variable
http://codingforums.com/showthread.php?s=e26b8b0aabc69745ef24a855b1a0fc83t=177529 It seems that this dude really is looking for how to double a variable... hi looking for help catching up in a class and overall to get me better than i am now. I can pay you by the week or per hour. everything can be done by email i will ask you questions and send you simple questions like: how to double a variables value i.e: def double(x): return (x * 2) ect. you can post here or send me an email at ***...@aol.com On Tue, Sep 22, 2009 at 9:01 AM, Mel mwil...@the-wire.com wrote: Tim Roberts wrote: daggerdvm dagger...@yahoo.com wrote: carl banks.you are a dork What are you, eleven years old? Look, you asked us to answer for you what is CLEARLY a homework question. It is unethical for you to ask that, and it is unethical for us to answer it. Forget ethical. We can do his homework for him, we can perhaps pass exams for him, maybe graduate for him, and then with our luck, he'll get a job in our office and we get to do his work for him. Mel. -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: easy question, how to double a variable
On 2009-09-22, Mel mwil...@the-wire.com wrote: Tim Roberts wrote: daggerdvm dagger...@yahoo.com wrote: carl banks.you are a dork What are you, eleven years old? Look, you asked us to answer for you what is CLEARLY a homework question. It is unethical for you to ask that, and it is unethical for us to answer it. Forget ethical. We can do his homework for him, we can perhaps pass exams for him, maybe graduate for him, and then with our luck, he'll get a job in our office and we get to do his work for him. No, no, no. The plan is to do his homework for him so that he's incompetent when he graduates and won't be competition for the rest of us who did do our homework. -- Grant Edwards grante Yow! ... the HIGHWAY is at made out of LIME JELLO and visi.commy HONDA is a barbequeued OYSTER! Yum! -- http://mail.python.org/mailman/listinfo/python-list
Re: easy question, how to double a variable
On Sep 22, 9:57 am, Grant Edwards inva...@invalid.invalid wrote: On 2009-09-22, Mel mwil...@the-wire.com wrote: Tim Roberts wrote: daggerdvm dagger...@yahoo.com wrote: carl banks.you are a dork What are you, eleven years old? Look, you asked us to answer for you what is CLEARLY a homework question. It is unethical for you to ask that, and it is unethical for us to answer it. Forget ethical. We can do his homework for him, we can perhaps pass exams for him, maybe graduate for him, and then with our luck, he'll get a job in our office and we get to do his work for him. No, no, no. The plan is to do his homework for him so that he's incompetent when he graduates and won't be competition for the rest of us who did do our homework. Well, while they may not be as much competition come promotion time, I think Mr. Finney had it right that these people *do* still somehow get hired, and then the rest of us end up having to do enough work for multiple people. Sometimes spending more time redoing other peoples' shoddy work than it would have taken to do ourselves in the first place. Annoying for the programmer, but really bad for business. -- http://mail.python.org/mailman/listinfo/python-list
Re: easy question, how to double a variable
On Tue, Sep 22, 2009 at 11:58 PM, Mahmoud Abdelkader mabdelka...@gmail.comwrote: hi looking for help catching up in a class and overall to get me better than i am now. I can pay you by the week or per hour. Wow. I'd feel guilty getting paid doing that. Sounds all too easy. I hope he is actually learning, not just thinking that money will solve all his problems. Cheers, Xav -- http://mail.python.org/mailman/listinfo/python-list
Re: easy question, how to double a variable
On Sep 20, 1:27 pm, daggerdvm dagger...@yahoo.com wrote: Write the definition of a function twice , that receives an int parameter and returns an int that is twice the value of the parameter. how can i do this Simple: Once you define the function, copy it using your editor commands, then paste it right below the original. Carl Banks -- http://mail.python.org/mailman/listinfo/python-list
Re: easy question, how to double a variable
Steven D'Aprano wrote: Write the definition of a function twice , that receives an int parameter and returns an int that is twice the value of the parameter. how can i do this Yes, that certainly is an easy question. Here's my solution: class MultiplierFactory(object): [snip a marvel of abstruse code] twice = MultiplierFactory(2)() It needs some error checking, but otherwise should work. Tsk...no docstrings? no unit tests or doctests? no parameter validation? no copyright notice? no revision-tracking nor authorship comments? what sort of bad example are you setting here? You want this kid to fail?! With such poor instruction, it's no wonder the economy is going to shambles, the educational system is falling apart, there's global warming, terrorism, spam, and reality television. Your piteous code make Paris Hilton cry. [shakes head in disappointment] ;-) -tkc -- http://mail.python.org/mailman/listinfo/python-list
Re: easy question, how to double a variable
u don't want to answerthen why post?...get lost. -- http://mail.python.org/mailman/listinfo/python-list
Re: easy question, how to double a variable
carl banks.you are a dork -- http://mail.python.org/mailman/listinfo/python-list
Re: easy question, how to double a variable
daggerdvm wrote: u don't want to answerthen why post?...get lost. On the contrary! We *do* want to answer. Prizes are awarded based on the most outlandish yet correct answer, on the most literal answer, and on the funniest answer! Ridiculous questions like yours are what make the daily checking of the mailing list worth while. Now, if you have a _real_ question, that's not homework, check out http://catb.org/~esr/faqs/smart-questions.html and then try again. Happy Coding! ~Ethan~ -- http://mail.python.org/mailman/listinfo/python-list
Re: easy question, how to double a variable
On Sep 21, 1:46 pm, daggerdvm dagger...@yahoo.com wrote: u don't want to answerthen why post?...get lost. I eat children... -- http://mail.python.org/mailman/listinfo/python-list
Re: easy question, how to double a variable
On Mon, 21 Sep 2009 13:50:23 -0500, David C Ullrich wrote: But you actually want to return twice the value. I don't see how to do that. What? Seriously? You're not just yanking the OP's chain??? -- Steven who normally does quite well detecting sarcasm in writing -- http://mail.python.org/mailman/listinfo/python-list
Re: easy question, how to double a variable
But you actually want to return twice the value. I don't see
how to do that.
Ah, I think I see...returning more than once is done with the
yield keyword:
def f(param):
yield param
yield param
That returns twice the integer parameter... :-D
However, the OP was instructed to Write the definition of a
function twice which means I'd have to copy paste the final
function definition a second time to make sure it was done twice
(as Carl suggested).
Then again as David notices, the subject lines asks how to double
a variable, in which case one might want
import struct
def f(param):
return struct.pack('f', param)
which doubles the parameter... :-S
-tkc
--
http://mail.python.org/mailman/listinfo/python-list
Re: easy question, how to double a variable
On 2009-09-21, David C Ullrich dullr...@sprynet.com wrote: On Sun, 20 Sep 2009 13:27:07 -0700, daggerdvm wrote: Write the definition of a function twice , that receives an int parameter and returns an int that is twice the value of the parameter. how can i do this I don't think this can be done in Python. Looking at the Subject line I thought your problem was going to be easy: There's only one float type in Python, so at least in most implementations simply converting to float will suffice to double a variable. But you actually want to return twice the value. I don't see how to do that. It's easy: def twice(i): return i return i -- Grant -- http://mail.python.org/mailman/listinfo/python-list
Re: easy question, how to double a variable
daggerdvm dagger...@yahoo.com wrote: carl banks.you are a dork What are you, eleven years old? Look, you asked us to answer for you what is CLEARLY a homework question. It is unethical for you to ask that, and it is unethical for us to answer it. As others have said, show us what you TRIED, and we can help you make it work. -- Tim Roberts, t...@probo.com Providenza Boekelheide, Inc. -- http://mail.python.org/mailman/listinfo/python-list
easy question, how to double a variable
Write the definition of a function twice , that receives an int parameter and returns an int that is twice the value of the parameter. how can i do this -- http://mail.python.org/mailman/listinfo/python-list
Re: easy question, how to double a variable
daggerdvm wrote: Write the definition of a function twice , that receives an int parameter and returns an int that is twice the value of the parameter. how can i do this That's a very basic question. Try a tutorial. -- http://mail.python.org/mailman/listinfo/python-list
Re: easy question, how to double a variable
daggerdvm wrote: Write the definition of a function twice , that receives an int parameter and returns an int that is twice the value of the parameter. how can i do this Read over your textbook and the notes you took in class -- I'm sure therein you'll find how to define functions, how to specify parameters, how to return values, and how to do basic arithmetic operations. You can also hit up python.org and diveintopython.org for more reading if you need. I'll give you a hint: If you use twice = lambda x: int(x**2/(0.5*x)) I suspect your professor will flunk you for cheating. -tkc -- http://mail.python.org/mailman/listinfo/python-list
Re: easy question, how to double a variable
On Sun, 20 Sep 2009 13:27:07 -0700, daggerdvm wrote: Write the definition of a function twice , that receives an int parameter and returns an int that is twice the value of the parameter. how can i do this Yes, that certainly is an easy question. Here's my solution: class MultiplierFactory(object): def __init__(self, factor=1): self.__factor = factor @property def factor(self): return getattr(self, '_%s__factor' % self.__class__.__name__) def __call__(self, factor=None): if not factor is not None is True: factor = self.factor class Multiplier(object): def __init__(self, factor=None): self.__factor = factor @property def factor(self): return getattr(self, '_%s__factor' % self.__class__.__name__) def __call__(self, n): return self.factor*n Multiplier.__init__.im_func.func_defaults = (factor,) return Multiplier(factor) twice = MultiplierFactory(2)() It needs some error checking, but otherwise should work. Ever-helpful-ly y'rs, -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: easy question, how to double a variable
On Mon, Sep 21, 2009 at 6:27 AM, daggerdvm dagger...@yahoo.com wrote: Write the definition of a function twice , that receives an int parameter and returns an int that is twice the value of the parameter. how can i do this I thought it was easier to implement this twice function than to find this mailing list. Aren't you being a little lazy? =] Cheers, Xav -- http://mail.python.org/mailman/listinfo/python-list
