RE: help how to sort a list in order of 'n' in python without using inbuilt functions??
> Date: Fri, 24 May 2013 23:05:17 -0700 > Subject: Re: help how to sort a list in order of 'n' in python without using > inbuilt functions?? > From: lokeshkopp...@gmail.com > To: python-list@python.org [...] > ya steven i had done the similar logic but thats not satisfying my professor > he had given the following constrains > 1. No in-built functions should be used > 2. we are expecting a O(n) solution > 3. Don't use count method That's trivial! # l is a list of numbers: 0,1,2 def order_n(l): r = [] count = [0]*3 count[2] = len(l) for i in range(len(l)): count[1] += abs((l[i]>0)-1) r.insert(count[l[i]], l[i]) return r 'count' is a list I've defined to count the quantity of the elements in the argument, not the method. I don't think it needs any explanations, but if you have any doubts just ask. ;) Good luck! -- http://mail.python.org/mailman/listinfo/python-list
Re: help how to sort a list in order of 'n' in python without using inbuilt functions??
On Sat, May 25, 2013 at 5:53 PM, Carlos Nepomuceno wrote: > >> Date: Fri, 24 May 2013 23:05:17 -0700 >> 1. No in-built functions should be used > count[2] = len(l) Fail! :) ChrisA -- http://mail.python.org/mailman/listinfo/python-list
RE: help how to sort a list in order of 'n' in python without using inbuilt functions??
> Date: Sat, 25 May 2013 18:28:32 +1000 > Subject: Re: help how to sort a list in order of 'n' in python without using > inbuilt functions?? > From: ros...@gmail.com > To: python-list@python.org > > On Sat, May 25, 2013 at 5:53 PM, Carlos Nepomuceno > wrote: >> >>> Date: Fri, 24 May 2013 23:05:17 -0700 >>> 1. No in-built functions should be used >> count[2] = len(l) > > Fail! :) > > ChrisA > -- > http://mail.python.org/mailman/listinfo/python-list lol I forgot to include this monkey patch! ;) def length(l): x=0 y=l[:] while y: x+=1 y.pop() return x -- http://mail.python.org/mailman/listinfo/python-list
Re: help how to sort a list in order of 'n' in python without using inbuilt functions??
On Sat, May 25, 2013 at 6:43 PM, Carlos Nepomuceno wrote: > > lol I forgot to include this monkey patch! ;) > > def length(l): > x=0 > y=l[:] > while y: > x+=1 > y.pop() > return x Nice. Now eliminate abs (easy) and range. :) ChrisA -- http://mail.python.org/mailman/listinfo/python-list
RE: help how to sort a list in order of 'n' in python without using inbuilt functions??
lol def absolute(x): return x if x>0 else -x def reach(x): y=[] z=0 while z Date: Sat, 25 May 2013 18:47:24 +1000 > Subject: Re: help how to sort a list in order of 'n' in python without using > inbuilt functions?? > From: ros...@gmail.com > To: python-list@python.org > > On Sat, May 25, 2013 at 6:43 PM, Carlos Nepomuceno > wrote: >> >> lol I forgot to include this monkey patch! ;) >> >> def length(l): >> x=0 >> y=l[:] >> while y: >> x+=1 >> y.pop() >> return x > > Nice. Now eliminate abs (easy) and range. :) > > ChrisA > -- > http://mail.python.org/mailman/listinfo/python-list > -- http://mail.python.org/mailman/listinfo/python-list
Re: help how to sort a list in order of 'n' in python without using inbuilt functions??
On Sat, May 25, 2013 at 6:54 PM, Carlos Nepomuceno wrote: > lol > > def absolute(x): > return x if x>0 else -x > > def reach(x): > y=[] > z=0 > while z y.append(z) > z+=1 > return y Very good. You are now in a position to get past the limitations of a restricted-environment eval/exec. Avoiding builtins is actually a fun skill to hone. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
RE: help how to sort a list in order of 'n' in python without using inbuilt functions??
> Date: Sat, 25 May 2013 19:01:09 +1000 > Subject: Re: help how to sort a list in order of 'n' in python without using > inbuilt functions?? > From: ros...@gmail.com > To: python-list@python.org [...] > Very good. You are now in a position to get past the limitations of a > restricted-environment eval/exec. Avoiding builtins is actually a fun > skill to hone. > > ChrisA I'm glad he didn't ask for a Pseudo-RNG without built-ins! ;) -- http://mail.python.org/mailman/listinfo/python-list
Re: help how to sort a list in order of 'n' in python without using inbuilt functions??
On Sat, May 25, 2013 at 7:10 PM, Carlos Nepomuceno wrote: > >> Date: Sat, 25 May 2013 19:01:09 +1000 >> Subject: Re: help how to sort a list in order of 'n' in python without using >> inbuilt functions?? >> From: ros...@gmail.com >> To: python-list@python.org > [...] >> Very good. You are now in a position to get past the limitations of a >> restricted-environment eval/exec. Avoiding builtins is actually a fun >> skill to hone. >> >> ChrisA > > > I'm glad he didn't ask for a Pseudo-RNG without built-ins! ;) def random_number(): return 7 ChrisA -- http://mail.python.org/mailman/listinfo/python-list
RE: help how to sort a list in order of 'n' in python without using inbuilt functions??
lol http://search.dilbert.com/comic/Random%20Nine > Date: Sat, 25 May 2013 19:14:57 +1000 > Subject: Re: help how to sort a list in order of 'n' in python without using > inbuilt functions?? > From: ros...@gmail.com > To: python-list@python.org > > On Sat, May 25, 2013 at 7:10 PM, Carlos Nepomuceno > wrote: >> >>> Date: Sat, 25 May 2013 19:01:09 +1000 >>> Subject: Re: help how to sort a list in order of 'n' in python without >>> using inbuilt functions?? >>> From: ros...@gmail.com >>> To: python-list@python.org >> [...] >>> Very good. You are now in a position to get past the limitations of a >>> restricted-environment eval/exec. Avoiding builtins is actually a fun >>> skill to hone. >>> >>> ChrisA >> >> >> I'm glad he didn't ask for a Pseudo-RNG without built-ins! ;) > > def random_number(): > return 7 > > ChrisA > -- > http://mail.python.org/mailman/listinfo/python-list > -- http://mail.python.org/mailman/listinfo/python-list
Py_Initialize and Py_Finalize and MatPlotlib
This is a known problem, but I want to ask the experts for the best way to solve it for me. I have a project (Euler Math Toolbox), which runs Python as a script language. For this, a library module "python.dll" is loaded at run time, which is linked against "python27.lib". Then Py_Initialize is called. This all works well. But Euler can be restarted by the user with a new session and notebook. Then I want Python to clear all variables and imports. For this, I call Py_Finalize and unload "python.dll". When Python is needed, loading and initializing starts Python again. This works. But Python crashes at the first call, if MatPlotlib is imported in the previous session. It seems that Py_Finalize does not completely clear Python, nor does unloading my "python.dll". I tried unloading "python27.dll" (the Python DLL), but this does not help. Most likey, another DLL remains active, but corrupts during Py_Finalize. To solve this, it would suffice to clear all variables and imports. I could live with not calling Py_Finalize. But how? PS: You may wonder, why I do not directly link euler.exe to Python. The reason is that this prevents Euler form starting, if Python is not installed, even if it is never needed. Thanks for any answers! You duplicate your answer to renegrothmann at gmail, if you like. That would help me. -- http://mail.python.org/mailman/listinfo/python-list
Total Beginner - Extracting Data from a Database Online (Screenshot)
If you are talking about accessing a web page, rather than an image, then you want to do what is known as screen scraping. One of the best tools for this is called BeautifulSoup. http://www.crummy.com/software/BeautifulSoup/ -- http://mail.python.org/mailman/listinfo/python-list
Total Beginner - Extracting Data from a Database Online (Screenshot)
If you are talking about accessing a web page, rather than an image, then what you want to do is known as 'screen scraping'. One of the best tools for this is called BeautifulSoup. http://www.crummy.com/software/BeautifulSoup/ -- http://mail.python.org/mailman/listinfo/python-list
Text-to-Sound or Vice Versa (Method NOT the source code)
Always wondered how sound is generated from text. Googling couldn't help. Devs having knowledge about this could provide, the information, Links, URLs or anything that could help. -- http://mail.python.org/mailman/listinfo/python-list
Re: help how to sort a list in order of 'n' in python without using inbuilt functions??
On 25/05/2013 09:54, Carlos Nepomuceno wrote: lol def absolute(x): return x if x>0 else -x def reach(x): y=[] z=0 while z In my book this is another fail as lists are inbuilt (yuck!) and so is the add function that'll be called for z+=1. -- If you're using GoogleCrap™ please read this http://wiki.python.org/moin/GoogleGroupsPython. Mark Lawrence -- http://mail.python.org/mailman/listinfo/python-list
Re: Text-to-Sound or Vice Versa (Method NOT the source code)
Rakshith Nayak wrote: >Always wondered how sound is generated from text. Googling couldn't help. Devs >having knowledge about this could provide, the information, Links, URLs or >anything that could help. Perhaps try 'text to speech' instead of 'text to sound'? Best regards, Günther -- http://mail.python.org/mailman/listinfo/python-list
Learning Python
Hi All , I have started leaning Python through web . Would like to know if I should follow any book so that basics become clear with examples also want to know like in perl i use to invoke perl -d to get a debugged output is there any option in python. THanks, -- http://mail.python.org/mailman/listinfo/python-list
Re: help how to sort a list in order of 'n' in python without using inbuilt functions??
In article <78192328-b31b-49d9-9cd6-ec742c092...@googlegroups.com>, lokeshkopp...@gmail.com wrote: > On Friday, May 24, 2013 1:34:51 PM UTC+5:30, lokesh...@gmail.com wrote: > > i need to write a code which can sort the list in order of 'n' without use > > builtin functions > > > > can anyone help me how to do? > > Note: > the list only contains 0's,1's,2's > need to sort them in order of 'n' What do you mean by "need to sort them in order of 'n'". Are you saying that you need to sort them into numerical order? Or that you need to running time of the algorithm to be O(n)? I'm assuming the later, in which case this is starting to sound like a classic interview question. Assuming you can accept an unstable sort, there's an easy solution. I'm not aware of any solution if you require a stable sort. Perhaps that's enough of a hint? -- http://mail.python.org/mailman/listinfo/python-list
Re: help how to sort a list in order of 'n' in python without using inbuilt functions??
In article <74e33270-a79a-4878-a400-8a6cda663...@googlegroups.com>, lokeshkopp...@gmail.com wrote: > ya steven i had done the similar logic but thats not satisfying my professor > he had given the following constrains > 1. No in-built functions should be used > 2. we are expecting a O(n) solution > 3. Don't use count method A couple of points here: 1) In general, people on mailing lists are not into doing homework problems for other people. 2) If you're going to bring us a homework problem, at least describe the whole problem up front. It really doesn't help to dribble out new requirements one at a time. 3) rustompm...@gmail.com already posted a pointer to the wikipedia article describing the required algorithm in detail. 4) I don't know what "no built-in functions should be used" means. I assume it means, "don't call sort()"? If you can't even call int.__lt__(), it's going to be really hard to do this. -- http://mail.python.org/mailman/listinfo/python-list
Re: help how to sort a list in order of 'n' in python without using inbuilt functions??
On 05/25/2013 10:03 AM, Roy Smith wrote: In article <74e33270-a79a-4878-a400-8a6cda663...@googlegroups.com>, lokeshkopp...@gmail.com wrote: ya steven i had done the similar logic but thats not satisfying my professor he had given the following constrains 1. No in-built functions should be used 2. we are expecting a O(n) solution 3. Don't use count method A couple of points here: 1) In general, people on mailing lists are not into doing homework problems for other people. 2) If you're going to bring us a homework problem, at least describe the whole problem up front. It really doesn't help to dribble out new requirements one at a time. 3) rustompm...@gmail.com already posted a pointer to the wikipedia article describing the required algorithm in detail. 4) I don't know what "no built-in functions should be used" means. I assume it means, "don't call sort()"? If you can't even call int.__lt__(), it's going to be really hard to do this. The OP has already admitted that he didn't want a sort at all. He wants to COUNT the items, not sort them. So nothing in his orginal post relates to the real homework assignment. -- DaveA -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Magazine
On Sat, 25 May 2013 16:41:58 +1000, Chris Angelico wrote: > On Sat, May 25, 2013 at 4:38 PM, zoom wrote: >> But why would anyone want to use IPv6? > > I hope you're not serious :) He's planning to drop off the Internet once the IP address run out. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: help how to sort a list in order of 'n' in python without using inbuilt functions??
On Sat, 25 May 2013 19:14:57 +1000, Chris Angelico wrote: > def random_number(): > return 7 I call shenanigans! That value isn't generated randomly, you just made it up! I rolled a die *hundreds* of times and not once did it come up seven! -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: help how to sort a list in order of 'n' in python without using inbuilt functions??
On Fri, 24 May 2013 23:05:17 -0700, lokeshkoppaka wrote: > On Saturday, May 25, 2013 11:27:38 AM UTC+5:30, Steven D'Aprano wrote: >> tally = 0 >> for item in list_of_items: >> if item == 0: >> tally = tally + 1 >> >> print "The number of zeroes equals", tally > > > ya steven i had done the similar logic but thats not satisfying my > professor he had given the following constrains > 1. No in-built functions should be used The above does not use any built-in functions. > 2. we are expecting a O(n) solution The above is O(n). > 3. Don't use count method The above does not use the count method. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: Learning Python
On Sat, 25 May 2013 18:11:11 +0530, Asad Hasan wrote: > I have started leaning Python through web . Would like to know > if I should follow any book so that basics become clear with examples Reading books is a good thing to do. > also > want to know like in perl i use to invoke perl -d to get a debugged > output is there any option in python. Yes. Instead of calling your script like this: python myscript.py call it like this: python -m pdb myscript.py -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: help how to sort a list in order of 'n' in python without using inbuilt functions??
On 25 May 2013 15:35, "Steven D'Aprano" < steve+comp.lang.pyt...@pearwood.info> wrote: > > On Sat, 25 May 2013 19:14:57 +1000, Chris Angelico wrote: > > > def random_number(): > > return 7 > > I call shenanigans! That value isn't generated randomly, you just made it > up! I rolled a die *hundreds* of times and not once did it come up seven! > > > > -- > Steven > -- > http://mail.python.org/mailman/listinfo/python-list Try flipping a coin. I flipped one a couple of times and got the seventh face once. -- http://mail.python.org/mailman/listinfo/python-list
Re: help how to sort a list in order of 'n' in python without using inbuilt functions??
Roy Smith writes: > In article <78192328-b31b-49d9-9cd6-ec742c092...@googlegroups.com>, > lokeshkopp...@gmail.com wrote: > > > On Friday, May 24, 2013 1:34:51 PM UTC+5:30, lokesh...@gmail.com wrote: > > > i need to write a code which can sort the list in order of 'n' > > > without use builtin functions > > > > > > can anyone help me how to do? > > > > Note: > > the list only contains 0's,1's,2's > > need to sort them in order of 'n' > > What do you mean by "need to sort them in order of 'n'". Are you > saying that you need to sort them into numerical order? Or that you > need to running time of the algorithm to be O(n)? > > I'm assuming the later, in which case this is starting to sound like > a classic interview question. > > Assuming you can accept an unstable sort, there's an easy solution. > I'm not aware of any solution if you require a stable sort. Perhaps > that's enough of a hint? Surely it's assumed that each element of the input list can be classified as 0, 1, or 2 in O(1) time. If O(n) auxiliary space can be allocated in O(n) time, just put the 0's in their own list in the order they are encountered, 1's in their own list in the order they are encountered, 2's in their own list in the order they are encountered, then put the 0's back into the input list in the order they are encountered in their auxiliary list, followed by the 1's, followed by the 2's. Stable and O(n), no? Even ( [ x for x in input if x.key == 0 ] + [ x for x in input if x.key == 1 ] + [ x for x in input if x.key == 2 ] ). I suppose a list comprehension is not technically a function any more than a loop is. (Neither stability nor O(1) space has been required yet, I think.) -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Magazine
All of the above, plus: - Best Pythonic tools for GUI - notorious projects (in science, education, NGOs, etc) using python Please keep us informed, and best wishes Daniel El 25/05/2013, a las 07:29, Michael Poeltl escribió: > * DRJ Reddy [2013-05-25 05:26]: >> Planning to start a python online chronicle.What you want to see in it. :) > - idiomatic python (common mistakes; do it 'pythonically') > - interviews > - challenge of the week (how would you solve that?) > - python for kids > - scientific python news > - new python-books > > - > > >> -- >> http://mail.python.org/mailman/listinfo/python-list > > -- > Michael Poeltl > Computational Materials Physics at University > Wien, Sensengasse 8/12, A-1090 Wien, AUSTRIA > http://cmp.univie.ac.at/ > http://homepage.univie.ac.at/michael.poeltl/ > using elinks-0.12, mutt-1.5.21, and vim-7.3, > with python-3.2.3, on slackware-13.37 :-) > fon: +43-1-4277-51409 > -- > http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: help how to sort a list in order of 'n' in python without using inbuilt functions??
On 25/05/2013 15:28, Steven D'Aprano wrote: On Sat, 25 May 2013 19:14:57 +1000, Chris Angelico wrote: def random_number(): return 7 I call shenanigans! That value isn't generated randomly, you just made it up! I rolled a die *hundreds* of times and not once did it come up seven! Lies, damn lies and statistics? :) -- If you're using GoogleCrap™ please read this http://wiki.python.org/moin/GoogleGroupsPython. Mark Lawrence -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Magazine
In article , Chris Angelico wrote: > > Also, comparison of Python flavors (CPython, PyPy, Cython, Stackles, etc.) Stackles? That sounds like breakfast cereal. "New all-natural stackles, with 12 essential vitamins, plus fiber!" -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Magazine
On Sun, May 26, 2013 at 1:24 AM, Roy Smith wrote: > In article , > Chris Angelico wrote: > >> > Also, comparison of Python flavors (CPython, PyPy, Cython, Stackles, etc.) > > Stackles? That sounds like breakfast cereal. > > "New all-natural stackles, with 12 essential vitamins, plus fiber!" Heh!! But watch the citations please, I didn't say that - my email was quoting Carlos. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Magazine
In article <51a0caac$0$30002$c3e8da3$54964...@news.astraweb.com>, Steven D'Aprano wrote: > On Sat, 25 May 2013 16:41:58 +1000, Chris Angelico wrote: > > > On Sat, May 25, 2013 at 4:38 PM, zoom wrote: > >> But why would anyone want to use IPv6? > > > > I hope you're not serious :) > > He's planning to drop off the Internet once the IP address run out. We already have run out. People have gotten so used to being behind NAT gateways they don't even understand how evil it is. From my phone, I can call any other phone anywhere in the world. But I can't talk directly to the file server in my neighbor's house across the street? -- http://mail.python.org/mailman/listinfo/python-list
Re: help how to sort a list in order of 'n' in python without using inbuilt functions??
On Sun, May 26, 2013 at 12:28 AM, Steven D'Aprano wrote: > On Sat, 25 May 2013 19:14:57 +1000, Chris Angelico wrote: > >> def random_number(): >> return 7 > > I call shenanigans! That value isn't generated randomly, you just made it > up! I rolled a die *hundreds* of times and not once did it come up seven! You've obviously never used a REAL set of dice. Now, I have here with me a set used for maths drill (to be entirely accurate, what I have here is the company's stock of them, so there are multiples of each of these - anyone need to buy dice?) with everything except the classic 1 through 6 that everyone knows: * Six sides, faces marked 7 through 12 * Six sides, faces marked "+x-\xf7+" and a "wild" marker (yes, two of +) * Ten sides, numbered 0 through 9 * Eight sides, numbered 1 through 8 * Twelve sides, as above * Twenty sides, as above Now, tabletop roleplayers will recognize the latter four as the ones notated as d10, d8, d12, and d20, but these are NOT for gameplay, they are for serious educational purposes! Honest! Anyway, all of those can roll a 7... well, one of them has to roll a \xf7, but close enough right? Plus, if you roll 2d6 (that is, two regular six-sided dice and add them up), 7 is statistically the most likely number to come up with. Therefore it IS random. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
RE: Ldap module and base64 oncoding
> Can you give an example of the code you have? I actually just overrode the regex used by the method in the LDIFWriter class to be far more broad about what it interprets as a safe string. I really need to properly handle reading, manipulating and writing non ascii data to solve this... Shame there is no ldap module (with the ldifwriter) in Python 3. jlc -- http://mail.python.org/mailman/listinfo/python-list
Re: Text-to-Sound or Vice Versa (Method NOT the source code)
On May 25, 3:52 pm, Rakshith Nayak wrote: > Always wondered how sound is generated from text. Googling couldn't help. > Devs having knowledge about this could provide, the information, Links, URLs > or anything that could help. > > look for speech synthesis http://en.wikipedia.org/wiki/Speech_synthesis -- http://mail.python.org/mailman/listinfo/python-list
RE: help how to sort a list in order of 'n' in python without using inbuilt functions??
> To: python-list@python.org > From: breamore...@yahoo.co.uk > Subject: Re: help how to sort a list in order of 'n' in python without using > inbuilt functions?? > Date: Sat, 25 May 2013 13:01:06 +0100 [...] > In my book this is another fail as lists are inbuilt (yuck!) and so is > the add function that'll be called for z+=1. Indeed! It's a joke Mark! lol ;) -- http://mail.python.org/mailman/listinfo/python-list
RE: help how to sort a list in order of 'n' in python without using inbuilt functions??
> From: steve+comp.lang.pyt...@pearwood.info > Subject: Re: help how to sort a list in order of 'n' in python without using > inbuilt functions?? > Date: Sat, 25 May 2013 14:28:33 + > To: python-list@python.org > > On Sat, 25 May 2013 19:14:57 +1000, Chris Angelico wrote: > >> def random_number(): >> return 7 > > I call shenanigans! That value isn't generated randomly, you just made it > up! I rolled a die *hundreds* of times and not once did it come up seven! lol It worked fine on my d8! lol -- http://mail.python.org/mailman/listinfo/python-list
RE: help how to sort a list in order of 'n' in python without using inbuilt functions??
> Date: Sun, 26 May 2013 01:41:58 +1000 > Subject: Re: help how to sort a list in order of 'n' in python without using > inbuilt functions?? > From: ros...@gmail.com > To: python-list@python.org > > On Sun, May 26, 2013 at 12:28 AM, Steven D'Aprano > wrote: >> On Sat, 25 May 2013 19:14:57 +1000, Chris Angelico wrote: >> >>> def random_number(): >>> return 7 >> >> I call shenanigans! That value isn't generated randomly, you just made it >> up! I rolled a die *hundreds* of times and not once did it come up seven! > > You've obviously never used a REAL set of dice. Now, I have here with > me a set used for maths drill (to be entirely accurate, what I have > here is the company's stock of them, so there are multiples of each of > these - anyone need to buy dice?) with everything except the classic 1 > through 6 that everyone knows: > > * Six sides, faces marked 7 through 12 > * Six sides, faces marked "+x-\xf7+" and a "wild" marker (yes, two of +) > * Ten sides, numbered 0 through 9 > * Eight sides, numbered 1 through 8 > * Twelve sides, as above > * Twenty sides, as above > > Now, tabletop roleplayers will recognize the latter four as the ones > notated as d10, d8, d12, and d20, but these are NOT for gameplay, they > are for serious educational purposes! Honest! > > Anyway, all of those can roll a 7... well, one of them has to roll a > \xf7, but close enough right? Plus, if you roll 2d6 (that is, two > regular six-sided dice and add them up), 7 is statistically the most > likely number to come up with. Therefore it IS random. > > ChrisA > -- > http://mail.python.org/mailman/listinfo/python-list def f(x): return x+1 or you can just go: f(roll_d6()) ;) -- http://mail.python.org/mailman/listinfo/python-list
Re: help how to sort a list in order of 'n' in python without using inbuilt functions??
On Sun, May 26, 2013 at 3:17 AM, Carlos Nepomuceno wrote: > def f(x): > return x+1 > > or you can just go: > > f(roll_d6()) Hmm. Interesting. So now we have a question: Does adding 1 to a random number make it less random? It adds determinism to the number; can a number be more deterministic while still no less random? Ah! I know. The answer comes from common sense: a = random() # a is definitely a random number a -= random() # a is no longer random, we subtracted all the randomness from it Of course, since number-number => number, a is still a number. And so we can conclude that adding 1 to a random dice roll does indeed leave all the randomness still in it. But wait! That means we can do better!! a = random() # a is a random number a *= 5 # a is clearly five times as random now! ChrisA -- http://mail.python.org/mailman/listinfo/python-list
RE: Learning Python
> Date: Sat, 25 May 2013 18:11:11 +0530 > Subject: Learning Python > From: pythona...@gmail.com > To: Python-list@python.org > > Hi All , > > I have started leaning Python through web . Would like to know > if I should follow any book so that basics become clear with examples > also want to know like in perl i use to invoke perl -d to get a > debugged output is there any option in python. > > THanks, > > -- http://mail.python.org/mailman/listinfo/python-list I have used those: "Dive into Python" (2004)[1] "Python Programming" (2012)[2] "Programming Python, 3rd Ed" (2006) [print] [1] http://www.diveintopython.net/ [1] http://en.wikibooks.org/wiki/Python_Programming -- http://mail.python.org/mailman/listinfo/python-list
RE: Python Magazine
> From: r...@panix.com > Subject: Re: Python Magazine > Date: Sat, 25 May 2013 11:24:03 -0400 > To: python-list@python.org > > In article , > Chris Angelico wrote: > >>> Also, comparison of Python flavors (CPython, PyPy, Cython, Stackles, etc.) > > Stackles? That sounds like breakfast cereal. > > "New all-natural stackles, with 12 essential vitamins, plus fiber!" > -- > http://mail.python.org/mailman/listinfo/python-list lol pardon my typo! I'm really considering that cereal! lol -- http://mail.python.org/mailman/listinfo/python-list
RE: help how to sort a list in order of 'n' in python without using inbuilt functions??
> Date: Sun, 26 May 2013 03:23:44 +1000 > Subject: Re: help how to sort a list in order of 'n' in python without using > inbuilt functions?? > From: ros...@gmail.com > To: python-list@python.org > > On Sun, May 26, 2013 at 3:17 AM, Carlos Nepomuceno > wrote: >> def f(x): >> return x+1 >> >> or you can just go: >> >> f(roll_d6()) > > Hmm. Interesting. So now we have a question: Does adding 1 to a random > number make it less random? It adds determinism to the number; can a > number be more deterministic while still no less random? > > Ah! I know. The answer comes from common sense: > > a = random() # a is definitely a random number > a -= random() # a is no longer random, we subtracted all the randomness from > it > > Of course, since number-number => number, a is still a number. And so > we can conclude that adding 1 to a random dice roll does indeed leave > all the randomness still in it. But wait! That means we can do > better!! > > a = random() # a is a random number > a *= 5 # a is clearly five times as random now! > > ChrisA > -- > http://mail.python.org/mailman/listinfo/python-list It depends if the result (any operation) is in the required range. For example: "int(random.random()+1)" it's not random at all! But "int(random.random()*1000)" my look random if it fits your needs. ;) -- http://mail.python.org/mailman/listinfo/python-list
RE: help how to sort a list in order of 'n' in python without using inbuilt functions??
> Date: Fri, 24 May 2013 23:05:17 -0700 > Subject: Re: help how to sort a list in order of 'n' in python without using > inbuilt functions?? > From: lokeshkopp...@gmail.com [...] > ya steven i had done the similar logic but thats not satisfying my professor > he had given the following constrains > 1. No in-built functions should be used > 2. we are expecting a O(n) solution > 3. Don't use count method PS: If you find something faster please let me know! -- http://mail.python.org/mailman/listinfo/python-list
Re: authentication with python-ldap
I have been doing the same thing and I tried to use java for testing the credentials and they are correct. It works perfectly with java. I really don´t know what we´re doing wrong. You are accessing a protected operation of the LDAP server and it (the server) rejects it due to invalid credentials. You may have forgotten to pass on credentials (e.g. a password) or the credentials do not fit to the specified user (maybe the user does not exist at all). http://www.uci.cu -- http://mail.python.org/mailman/listinfo/python-list
RE: authentication with python-ldap
> I have been doing the same thing and I tried to use java for testing the > credentials and they are correct. It works perfectly with java. > I really don´t know what we´re doing wrong. > > > You are accessing a protected operation of the LDAP server > and it (the server) rejects it due to invalid credentials. > You may have forgotten to pass on credentials (e.g. a password) > or the credentials do not fit to the specified user > (maybe the user does not exist at all). Depending on the directory (which we don't know) and the code as well, the way you auth might be the problem. Possibly Java met the directory requirements with the methods you used whereas they did not with Python given your code. For example, certain operations in AD require specific transports to be used... jlc -- http://mail.python.org/mailman/listinfo/python-list
Re: Newbie question about evaluating raw_input() responses
On Thu, 23 May 2013 17:20:19 +1000, Chris Angelico wrote: > Aside: Why was PHP's /e regexp option ever implemented? Because it's a stupid idea, and that's the only requirement for a feature to be implemented in PHP. -- http://mail.python.org/mailman/listinfo/python-list
Re: Newbie question about evaluating raw_input() responses
On Sun, May 26, 2013 at 4:27 AM, Nobody wrote: > On Thu, 23 May 2013 17:20:19 +1000, Chris Angelico wrote: > >> Aside: Why was PHP's /e regexp option ever implemented? > > Because it's a stupid idea, and that's the only requirement for a feature > to be implemented in PHP. Hey, don't be rude. I mean, not that it isn't true, but it's still rude to say it. Ah, who am I kidding. Be as rude as you like. I have to work with PHP all week. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: Newbie question about evaluating raw_input() responses
On 25 May 2013 19:37, "Chris Angelico" wrote: > Ah, who am I kidding. Be as rude as you like. I have to work with PHP all week. > > ChrisA > -- > http://mail.python.org/mailman/listinfo/python-list I have cried. -- http://mail.python.org/mailman/listinfo/python-list
Re: Total Beginner - Extracting Data from a Database Online (Screenshot)
Sorry to be unclear -- it's a screenshot of the webpage, which is publicly accessible, but it contains sensitive information. A bad combination, admittedly, and something that'll be soon fixed. -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Magazine
On Saturday, May 25, 2013 8:30:19 AM UTC-7, Roy Smith wrote: > From my phone, I > can call any other phone anywhere in the world. But I can't talk > directly to the file server in my neighbor's house across the street? Hmmm... I've been an advocate of IPv6, but... now you've got me thinking of what Iran's new cadre of hackers might do with it! :^) -- http://mail.python.org/mailman/listinfo/python-list
Re: Simple algorithm question - how to reorder a sequence economically
On Friday, May 24, 2013 10:33:47 AM UTC-7, Yours Truly wrote: > If you don't reshuffle p, it guarantees the maximum interval between reusing > the same permutation. Of course, that comes at a certain price. Given two permutations p[x] and p[x+1], they will ALWAYS be adjacent, in every repetition of the list, unless you reshuffle. So the "spurious correlation" problem that Peter is worrying about would still exist, albeit at a meta-level. You could play clever games, such as splitting p in half once you get to the end of it, shuffling each half independently, and then concatenating the halves. This algorithm scrambles the p[x]'s and p[x+1]'s pretty well, at the cost of cutting the average interval between repeats of a given p[x] from len(p) to something closer to len(p)/2. Because someone's got to say it... "The generation of random numbers is too important to be left to chance." — Robert R. Coveyou -- http://mail.python.org/mailman/listinfo/python-list
Re: Total Beginner - Extracting Data from a Database Online (Screenshot)
On Friday, May 24, 2013 4:36:35 PM UTC-7, Carlos Nepomuceno wrote:
> #to create the tables list
> tables=[[re.findall('(.*?)',r,re.S) for r in
> re.findall('(.*?)',t,re.S)] for t in
> re.findall('(.*?)',page,re.S)]
>
>
> Pretty simple.
Two nested list comprehensions, with regex pattern matching?
Logan did say he was a "total beginner." :^)
--
http://mail.python.org/mailman/listinfo/python-list
Re: Simple algorithm question - how to reorder a sequence economically
In article <15a1bb3a-514c-454e-a966-243c84123...@googlegroups.com>, John Ladasky wrote: > Because someone's got to say it... "The generation of random numbers is too > important to be left to chance." Robert R. Coveyou Absolutely. I know just enough about random number generation to understand that I don't really know anything about it :-) That being said, people who really care about random numbers, tend to rely on some sort of physical process instead of computer algorithms. A classic example would be /dev/random. A somewhat more fun example is http://www.youtube.com/watch?v=7n8LNxGbZbs. Something radioactive and a geiger counter are a good source of randomness (time intervals between decay events). -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Magazine
In article <7cd17be8-d455-4db8-b8d0-ccc757db5...@googlegroups.com>, John Ladasky wrote: > On Saturday, May 25, 2013 8:30:19 AM UTC-7, Roy Smith wrote: > > From my phone, I > > can call any other phone anywhere in the world. But I can't talk > > directly to the file server in my neighbor's house across the street? > > Hmmm... I've been an advocate of IPv6, but... now you've got me thinking of > what Iran's new cadre of hackers might do with it! :^) You (like many people) are confusing universal addressability with universal connectivity. The converse of that is people confusing NAT with security. Of course not every IPv6 endpoint will be able to talk to every other IPv6 endpoint, even if the both have globally unique addresses. But, the access controls will be implemented in firewalls with appropriately coded security policies. Not as an accident of being behind a NAT box. -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Magazine
On Sun, May 26, 2013 at 11:54 AM, Roy Smith wrote: > In article <7cd17be8-d455-4db8-b8d0-ccc757db5...@googlegroups.com>, > John Ladasky wrote: > >> On Saturday, May 25, 2013 8:30:19 AM UTC-7, Roy Smith wrote: >> > From my phone, I >> > can call any other phone anywhere in the world. But I can't talk >> > directly to the file server in my neighbor's house across the street? >> >> Hmmm... I've been an advocate of IPv6, but... now you've got me thinking of >> what Iran's new cadre of hackers might do with it! :^) > > You (like many people) are confusing universal addressability with > universal connectivity. The converse of that is people confusing NAT > with security. > > Of course not every IPv6 endpoint will be able to talk to every other > IPv6 endpoint, even if the both have globally unique addresses. But, > the access controls will be implemented in firewalls with appropriately > coded security policies. Not as an accident of being behind a NAT box. To be more specific: The control of who can talk to whom is in the hands of the admins of the two endpoints and the nodes in between, rather than being arbitrarily in the hands of the technology. So I would be able to talk to the file server across the street, but only IF its admin lets me. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Magazine
A perfectly fair point, Roy. It's just when you started suggesting connecting to your neighbor's file server -- well, that's not something that many people would ordinarily do. So, my mind leaped to the possibility of uninvited connections. Related question: would denial-of-service attacks be more pernicious without a NAT? -- http://mail.python.org/mailman/listinfo/python-list
Automate Grabbing Email From Outlook On Shared Folder
I am trying to automate Outlook mail client by retrieving a message with an
attachment, using win32com. The message box is a shared folder that is not
really underneath root folder inbox, so I had no success with inbox =
mapi.GetDefaultFolder(6). However, I did have some success with:
import win32com.client
outlook = win32com.client.Dispatch("Outlook.Application")
mapi = outlook.GetNamespace("MAPI").Folders
print mapi[7]
In which the output is "Mailbox - Foo Operations"--- the folder I want.
However, if I tried:
import win32com.client
outlook = win32com.client.Dispatch("Outlook.Application")
mapi = outlook.GetNamespace("MAPI").Folders
messages = mapi[7].Items
message = messages.getLast()
body_content = message.body
print body_content
I get no success. So I am pretty much stuck. I googled many things but no
success. I prefer to win32com since I don't have to use a login in the script.
But if this is possible with another Python module with no login requirement
that would be great also.
--
http://mail.python.org/mailman/listinfo/python-list
Re: help how to sort a list in order of 'n' in python without using inbuilt functions??
On Sun, 26 May 2013 01:41:58 +1000, Chris Angelico wrote:
> On Sun, May 26, 2013 at 12:28 AM, Steven D'Aprano
> wrote:
>> On Sat, 25 May 2013 19:14:57 +1000, Chris Angelico wrote:
>>
>>> def random_number():
>>> return 7
>>
>> I call shenanigans! That value isn't generated randomly, you just made
>> it up! I rolled a die *hundreds* of times and not once did it come up
>> seven!
>
> You've obviously never used a REAL set of dice.
You're right, all my dice are eight-sided and complex:
1+0i
1+1i
1-1i
-1+0i
-1+1i
-1-1i
:-)
But seriously, I have various D&D style gaming dice, d4, d6, d8, d12, d20
and d30. But I thought the opportunity for a joke was more important than
pedantic correctness :-)
> Now, I have here with me
> a set used for maths drill (to be entirely accurate, what I have here is
> the company's stock of them, so there are multiples of each of these -
> anyone need to buy dice?)
Are you serious? What's the cost, posted to Melbourne?
> with everything except the classic 1 through 6 that everyone knows:
>
> * Six sides, faces marked 7 through 12
> * Six sides, faces marked "+x-\xf7+" and a "wild" marker
> (yes, two of +)
Oh, you mean ÷ (division sign)! Why didn't you say so? :-P
And another thing, shame on you, you mean × not x. It's easy to find too:
py> from unicodedata import lookup
py> print(lookup("MULTIPLICATION SIGN"))
×
> * Ten sides, numbered 0 through 9
> * Eight sides, numbered 1 through 8
> * Twelve sides, as above
> * Twenty sides, as above
>
> Now, tabletop roleplayers will recognize the latter four as the ones
> notated as d10, d8, d12, and d20, but these are NOT for gameplay, they
> are for serious educational purposes! Honest!
>
> Anyway, all of those can roll a 7... well, one of them has to roll a
> \xf7, but close enough right?
I don't think so...
> Plus, if you roll 2d6 (that is, two
> regular six-sided dice and add them up), 7 is statistically the most
> likely number to come up with. Therefore it IS random.
Yes, but if you subtract them the most common is 0, if you multiply the
most common are 6 or 12, and if you divide the most common is 1. If you
decide on the operation randomly, using the +-×÷+ die above (ignoring
wildcards), the most common result is 6. The probability of getting a 7
is just 1/15.
from collections import Counter
from operator import add, sub, mul, truediv as div
ops = (add, sub, mul, div, add)
Counter(op(i, j) for op in ops for i in range(1, 7) for j in range(1, 7))
--
Steven
--
http://mail.python.org/mailman/listinfo/python-list
Re: Python Magazine
In article <8f19e20c-4f77-43dc-a732-4169e482d...@googlegroups.com>, John Ladasky wrote: > A perfectly fair point, Roy. It's just when you started suggesting > connecting to your neighbor's file server -- well, that's not something that > many people would ordinarily do. So, my mind leaped to the possibility of > uninvited connections. > > Related question: would denial-of-service attacks be more pernicious without > a NAT? Not really. If I know the external IP address of your NAT box, I can throw as much traffic at it as your internet connection will deliver. Assuming you have sufficient bandwidth, eventually I'll melt down your router. This is equally true with NAT or without it. -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Magazine
On 26/05/2013 02:58, Chris Angelico wrote: On Sun, May 26, 2013 at 11:54 AM, Roy Smith wrote: In article <7cd17be8-d455-4db8-b8d0-ccc757db5...@googlegroups.com>, John Ladasky wrote: On Saturday, May 25, 2013 8:30:19 AM UTC-7, Roy Smith wrote: From my phone, I can call any other phone anywhere in the world. But I can't talk directly to the file server in my neighbor's house across the street? Hmmm... I've been an advocate of IPv6, but... now you've got me thinking of what Iran's new cadre of hackers might do with it! :^) You (like many people) are confusing universal addressability with universal connectivity. The converse of that is people confusing NAT with security. Of course not every IPv6 endpoint will be able to talk to every other IPv6 endpoint, even if the both have globally unique addresses. But, the access controls will be implemented in firewalls with appropriately coded security policies. Not as an accident of being behind a NAT box. To be more specific: The control of who can talk to whom is in the hands of the admins of the two endpoints and the nodes in between, rather than being arbitrarily in the hands of the technology. So I would be able to talk to the file server across the street, but only IF its admin lets me. ChrisA By such means as leaving the top level admin password set to the factory default? :) -- If you're using GoogleCrap™ please read this http://wiki.python.org/moin/GoogleGroupsPython. Mark Lawrence -- http://mail.python.org/mailman/listinfo/python-list
Re: help how to sort a list in order of 'n' in python without using inbuilt functions??
On Sun, 26 May 2013 03:23:44 +1000, Chris Angelico wrote: > Does adding 1 to a random > number make it less random? It adds determinism to the number; can a > number be more deterministic while still no less random? > > Ah! I know. The answer comes from common sense: [snip spurious answer] I know you're being funny, but in fact adding a constant to a random variable still leaves it equally random. Adding, multiplying, dividing or subtracting a constant from a random variable X just shifts the possible values X can take, it doesn't change the shape of the distribution. However, adding two random variables X and Y does change the distribution. In fact, a very cheap way of simulating an almost normally distributed random variable is to add up a whole lot of uniformly distributed random variables. Adding up 12 calls to random.random(), and subtracting 6, gives you a close approximation to a Gaussian random variable with mean 0 and standard deviation 1. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Magazine
On Sun, May 26, 2013 at 1:04 PM, John Ladasky wrote: > A perfectly fair point, Roy. It's just when you started suggesting > connecting to your neighbor's file server -- well, that's not something that > many people would ordinarily do. So, my mind leaped to the possibility of > uninvited connections. > > Related question: would denial-of-service attacks be more pernicious without > a NAT? Not sure what you mean. If we assume that network topology doesn't change, then what we have is a single uplink (say, an ADSL connection, given that most home users don't have luxuries) going to a router (let's be generous here and say that's a Linux box with two NICs, and you have a smart admin in charge of it), behind which is a set of switches and computers making up a LAN of peers. On IPv4, the LAN would operate on one of the RFC 1918 address blocks - say, 192.168.0.x - and all external communication would be through one single IP address - 203.0.113.47 will do for the purposes of discussion. As far as other hosts on the internet are concerned, that entire network is one single host, with address 203.0.113.47. It's unaware of the three computers 192.168.0.4, .0.87, and .0.92; they merge into one. This means they share the 65536 ports, they share entries on blacklists, etc, etc. With IPv6, that ADSL connection would come with a /64 block - say, 2001:db8:142:857::/64. Within that block, each computer would be assigned a single address - perhaps 2001:db8:142:857::4, 2001:db8:142:857::87, and 2001:db8:142:857::92, or perhaps they'd be assigned them by their MAC addresses eg 2001:db8:142:857:200:5eff:fe00:531a, which can be done automatically. Now all your computers (including the router) are individually addressable; they can be identified separately, or treated as a group (the /64 representing the whole group). Their ports, blacklist entries, etc, are all unique. This means you can run three servers on port 80, etc. The question now is: What sort of DOS attack are you fearing? If it's a simple matter of saturating the connection, it makes absolutely no difference. As Roy said, that's just a question of overloading. If I command more bandwidth than you do, I can saturate you. Easy. (Very easy if I have a botnet, for instance.) Harder to judge are the amplifying attacks; a half-open-connection attack, for instance, attacks a TCP server's RAM allocation. It's possible that some attacks will be easier or harder with NAT than without, but you'd have to evaluate a specific attack technique. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Magazine
On Sat, 25 May 2013 21:54:43 -0400, Roy Smith wrote: > Of course not every IPv6 endpoint will be able to talk to every other > IPv6 endpoint, even if the both have globally unique addresses. But, > the access controls will be implemented in firewalls with appropriately > coded security policies. Or, more likely, *not* implemented in firewalls with *inappropriately* coded security policies. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
CrazyHTTPd - HTTP Daemon in Python
This is a small little Project that I have started. Its a light little Web Server (HTTPd) coded in python. Requirements: Python 2.7 =< And Linux / BSD. I believe this could work in a CLI Emulator in windows too. Welcome to check out the website powered by CrazyHTTPd: http://web.crazycoder.me:14081/index.html Please Email me with any bugs, errors, and/or comments about my little project: cdorm...@gmail.com -- http://mail.python.org/mailman/listinfo/python-list
Re: help how to sort a list in order of 'n' in python without using inbuilt functions??
On Sun, May 26, 2013 at 1:09 PM, Steven D'Aprano
wrote:
> You're right, all my dice are eight-sided and complex:
>
> 1+0i
> 1+1i
> 1-1i
> -1+0i
> -1+1i
> -1-1i
>
>
> :-)
Now THAT is a dice of win!
>> Now, I have here with me
>> a set used for maths drill (to be entirely accurate, what I have here is
>> the company's stock of them, so there are multiples of each of these -
>> anyone need to buy dice?)
>
> Are you serious? What's the cost, posted to Melbourne?
$1 each, postage probably $5 for any number. Or there may even be
option to pick up / hand deliver, depending on where in Melb you are.
http://www.kepl.com.au/ - company's winding down, but we still have stock.
> Oh, you mean ÷ (division sign)! Why didn't you say so? :-P
I tend to stick to ASCII in these posts. :)
> And another thing, shame on you, you mean × not x. It's easy to find too:
>
> py> from unicodedata import lookup
> py> print(lookup("MULTIPLICATION SIGN"))
> ×
I'm aware of that, but see above, I stick to ASCII where possible. The
faces would be better represented with some of the other digits (the
bolded ones, perhaps), but I used the ASCII digits. :)
>> Plus, if you roll 2d6 (that is, two
>> regular six-sided dice and add them up), 7 is statistically the most
>> likely number to come up with. Therefore it IS random.
>
> Yes, but if you subtract them the most common is 0, if you multiply the
> most common are 6 or 12, and if you divide the most common is 1. If you
> decide on the operation randomly, using the +-×÷+ die above (ignoring
> wildcards), the most common result is 6. The probability of getting a 7
> is just 1/15.
>
> from collections import Counter
> from operator import add, sub, mul, truediv as div
> ops = (add, sub, mul, div, add)
> Counter(op(i, j) for op in ops for i in range(1, 7) for j in range(1, 7))
LOL! I never thought to go THAT far into the analysis. Nice one!
ChrisA
--
http://mail.python.org/mailman/listinfo/python-list
RE: Python Magazine
> Date: Sat, 25 May 2013 20:04:28 -0700 > Subject: Re: Python Magazine > From: john_lada...@sbcglobal.net > To: python-list@python.org > > A perfectly fair point, Roy. It's just when you started suggesting connecting > to your neighbor's file server -- well, that's not something that many people > would ordinarily do. So, my mind leaped to the possibility of uninvited > connections. > > Related question: would denial-of-service attacks be more pernicious without > a NAT? > -- > http://mail.python.org/mailman/listinfo/python-list I don't think so. IP blocking still a very common mitigation approach to DDoS, but it may cause denial of service to legitimate clients who share the same blocked public IP address used by the malicious clients. So, NAPT will still benefit DDoS attackers, at least temporarily (until the IP is unblocked). -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Magazine
On Sun, 26 May 2013 11:58:09 +1000, Chris Angelico wrote: > On Sun, May 26, 2013 at 11:54 AM, Roy Smith wrote: >> Of course not every IPv6 endpoint will be able to talk to every other >> IPv6 endpoint, even if the both have globally unique addresses. But, >> the access controls will be implemented in firewalls with appropriately >> coded security policies. Not as an accident of being behind a NAT box. > > To be more specific: The control of who can talk to whom is in the hands > of the admins of the two endpoints and the nodes in between, rather than > being arbitrarily in the hands of the technology. So I would be able to > talk to the file server across the street, but only IF its admin lets > me. Or when (not if) you find a vulnerability in the particular firewall. Make no mistake: the most secure entry point is the one that isn't there. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: CrazyHTTPd - HTTP Daemon in Python
On 26/05/2013 04:55, cdorm...@gmail.com wrote: This is a small little Project that I have started. Its a light little Web Server (HTTPd) coded in python. Requirements: Python 2.7 =< And Linux / BSD. I believe this could work in a CLI Emulator in windows too. Welcome to check out the website powered by CrazyHTTPd: http://web.crazycoder.me:14081/index.html Please Email me with any bugs, errors, and/or comments about my little project: cdorm...@gmail.com IMHO writing a project right now that is limited to Python 2 is about as much use as a chocolate teapot. -- If you're using GoogleCrap™ please read this http://wiki.python.org/moin/GoogleGroupsPython. Mark Lawrence -- http://mail.python.org/mailman/listinfo/python-list
Re: help how to sort a list in order of 'n' in python without using inbuilt functions??
On Sun, 26 May 2013 03:38:12 +, Steven D'Aprano wrote: > ... adding a constant to a random variable still leaves it equally > random. Adding, multiplying, dividing or subtracting a constant from a > random variable X just shifts the possible values X can take ... That's mathematically true, but this is the Python mailing list. Adding, subtracting, or dividing by a sufficiently large constant loses all the randomness. Python 3.2.4 (default, May 8 2013, 20:55:18) [GCC 4.7.3] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import random >>> random.random() + 1e200 1e+200 >>> random.random() - 1e200 -1e+200 >>> random.random() / 1e309 0.0 But you knew that. ;-) Dan -- http://mail.python.org/mailman/listinfo/python-list
RE: CrazyHTTPd - HTTP Daemon in Python
Your code isn't threaded. I suggest you consider[1] and take that road! ;) Good luck! [1] http://bulk.fefe.de/scalable-networking.pdf > To: python-list@python.org > From: breamore...@yahoo.co.uk > Subject: Re: CrazyHTTPd - HTTP Daemon in Python > Date: Sun, 26 May 2013 05:06:50 +0100 > > On 26/05/2013 04:55, cdorm...@gmail.com wrote: >> This is a small little Project that I have started. Its a light little Web >> Server (HTTPd) coded in python. Requirements: Python 2.7 =< And Linux / BSD. >> I believe this could work in a CLI Emulator in windows too. >> Welcome to check out the website powered by CrazyHTTPd: >> http://web.crazycoder.me:14081/index.html >> >> Please Email me with any bugs, errors, and/or comments about my little >> project: cdorm...@gmail.com >> > > IMHO writing a project right now that is limited to Python 2 is about as > much use as a chocolate teapot. > > -- > If you're using GoogleCrap™ please read this > http://wiki.python.org/moin/GoogleGroupsPython. > > Mark Lawrence > > -- > http://mail.python.org/mailman/listinfo/python-list > -- http://mail.python.org/mailman/listinfo/python-list
Re: help how to sort a list in order of 'n' in python without using inbuilt functions??
On Sun, May 26, 2013 at 1:38 PM, Steven D'Aprano wrote: > On Sun, 26 May 2013 03:23:44 +1000, Chris Angelico wrote: > >> Does adding 1 to a random >> number make it less random? It adds determinism to the number; can a >> number be more deterministic while still no less random? >> >> Ah! I know. The answer comes from common sense: > [snip spurious answer] > > I know you're being funny, but in fact adding a constant to a random > variable still leaves it equally random. Adding, multiplying, dividing or > subtracting a constant from a random variable X just shifts the possible > values X can take, it doesn't change the shape of the distribution. In real numbers, that's correct. However, computers don't work with real numbers, so there's the very, uhh, REAL possibility that some of the entropy will be lost. For instance, multiplying and dividing when working with integers results in truncation, and adding huge numbers to small floats results in precision loss. I was deliberately playing around, but unfortunately there have been many people who've genuinely thought things similar to what I was saying - and then implemented into code. > However, adding two random variables X and Y does change the > distribution. In fact, a very cheap way of simulating an almost normally > distributed random variable is to add up a whole lot of uniformly > distributed random variables. Adding up 12 calls to random.random(), and > subtracting 6, gives you a close approximation to a Gaussian random > variable with mean 0 and standard deviation 1. Yep. The more dice you roll, the more normal the distribution. Which means that d100 is extremely swingy, but 11d10-10 is much less so, and 99d2-98 quite stable. The more randomness you add, the more predictable the result. Does that seem right to you? ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Magazine
On Sun, May 26, 2013 at 2:01 PM, Carlos Nepomuceno wrote: > >> Date: Sat, 25 May 2013 20:04:28 -0700 >> Subject: Re: Python Magazine >> From: john_lada...@sbcglobal.net >> To: python-list@python.org >> >> A perfectly fair point, Roy. It's just when you started suggesting >> connecting to your neighbor's file server -- well, that's not something that >> many people would ordinarily do. So, my mind leaped to the possibility of >> uninvited connections. >> >> Related question: would denial-of-service attacks be more pernicious without >> a NAT? >> -- >> http://mail.python.org/mailman/listinfo/python-list > > I don't think so. > > IP blocking still a very common mitigation approach to DDoS, but it may cause > denial of service to legitimate clients who share the same blocked public IP > address used by the malicious clients. So, NAPT will still benefit DDoS > attackers, at least temporarily (until the IP is unblocked). I expect that IP blocks will be upgraded to /64 block blocks, if that starts being a problem. But it often won't, and specific IP address blocks will still be the norm. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Magazine
On Sun, May 26, 2013 at 2:03 PM, Steven D'Aprano wrote: > On Sun, 26 May 2013 11:58:09 +1000, Chris Angelico wrote: > >> On Sun, May 26, 2013 at 11:54 AM, Roy Smith wrote: > >>> Of course not every IPv6 endpoint will be able to talk to every other >>> IPv6 endpoint, even if the both have globally unique addresses. But, >>> the access controls will be implemented in firewalls with appropriately >>> coded security policies. Not as an accident of being behind a NAT box. >> >> To be more specific: The control of who can talk to whom is in the hands >> of the admins of the two endpoints and the nodes in between, rather than >> being arbitrarily in the hands of the technology. So I would be able to >> talk to the file server across the street, but only IF its admin lets >> me. > > Or when (not if) you find a vulnerability in the particular firewall. > Make no mistake: the most secure entry point is the one that isn't there. Packets have to get somewhere. If they come into this computer, it has to deliberately forward them to that computer or they won't get there. Same thing. All it takes is # ip6tables -p FORWARD DROP and you have a "secure unless I specifically permit it" router. Obviously an attacker can target the router itself (which is exactly the same as current situation), but can't attack anything beyond it without an explicit forwarding rule (which is also exactly the same). ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: CrazyHTTPd - HTTP Daemon in Python
On Sunday, May 26, 2013 12:21:46 PM UTC+8, Carlos Nepomuceno wrote: > Your code isn't threaded. I suggest you consider[1] and take that road! ;) > Good luck! > > [1] http://bulk.fefe.de/scalable-networking.pdf > > > > To: python-list@python.org > > From: breamore...@yahoo.co.uk > > Subject: Re: CrazyHTTPd - HTTP Daemon in Python > > Date: Sun, 26 May 2013 05:06:50 +0100 > > > > On 26/05/2013 04:55, cdorm...@gmail.com wrote: > >> This is a small little Project that I have started. Its a light little Web > >> Server (HTTPd) coded in python. Requirements: Python 2.7 =< And Linux / > >> BSD. I believe this could work in a CLI Emulator in windows too. > >> Welcome to check out the website powered by CrazyHTTPd: > >> http://web.crazycoder.me:14081/index.html > >> > >> Please Email me with any bugs, errors, and/or comments about my little > >> project: cdorm...@gmail.com > >> > > > > IMHO writing a project right now that is limited to Python 2 is about as > > much use as a chocolate teapot. > > > > -- > > If you're using GoogleCrap™ please read this > > http://wiki.python.org/moin/GoogleGroupsPython. > > > > Mark Lawrence > > > > -- > > http://mail.python.org/mailman/listinfo/python-list Thanks, I plan on doing this. Then CrazyHTTPd will support bigger file downloading and multiple network connections at once. Thanks Again! -- http://mail.python.org/mailman/listinfo/python-list
RE: Python Magazine
> Date: Sun, 26 May 2013 14:31:57 +1000 > Subject: Re: Python Magazine > From: ros...@gmail.com > To: python-list@python.org [...] > I expect that IP blocks will be upgraded to /64 block blocks, if that > starts being a problem. But it often won't, and specific IP address > blocks will still be the norm. > > ChrisA Blocking a whole network (/65) is totally undesirable and may even become illegal. Currently it may not only happen at the target of the DDoS attack, but be spread all over the internet where block lists are enforced. I don't expect that to happen and if it happens I'm surely in favor of protection against this type of 'solution' because it will block not only malicious clients but potentially many other legitimate clients. -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Magazine
On Sun, May 26, 2013 at 3:00 PM, Carlos Nepomuceno wrote: > >> Date: Sun, 26 May 2013 14:31:57 +1000 >> Subject: Re: Python Magazine >> From: ros...@gmail.com >> To: python-list@python.org > [...] >> I expect that IP blocks will be upgraded to /64 block blocks, if that >> starts being a problem. But it often won't, and specific IP address >> blocks will still be the norm. >> >> ChrisA > > > Blocking a whole network (/65) is totally undesirable and may even become > illegal. Blocking a /64 is exactly the same as blocking a /32 with NAT behind it. And how could it be illegal? I provide service to those I choose to provide to. > Currently it may not only happen at the target of the DDoS attack, but be > spread all over the internet where block lists are enforced. > > I don't expect that to happen and if it happens I'm surely in favor of > protection against this type of 'solution' because it will block not only > malicious clients but potentially many other legitimate clients. Banning a wide netblock is of course going to lock out legit clients. But IP rotation means that can happen anyway. You block a single IPv4 address that right now represents an abusive user; that user disconnects and reconnects, gets a new IP, and someone else gets the other one. Can happen all too easily. That's why IP-banning is at best a temporary solution anyway. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: authentication with python-ldap
Jorge Alberto Diaz Orozco wrote at 2013-5-25 14:00 -0400: >I have been doing the same thing and I tried to use java for testing the >credentials and they are correct. It works perfectly with java. >I really don´t know what we´re doing wrong. Neither do I. But the error message definitely originates from the LDAP server. This means that the server sees different things for the (successful) Java connection and the (unsuccessful) Python connection. Maybe, you can convince your LDAP server administrator to configure a form of logging that allows you to compare the two requests (this may not be easy - because sensitive information is involved). Comparing the requests may provide valuable clues towards the cause of the problem. One may also try some guesswork: There is an important difference between Java and Python 2. Java uses unicode as the typical type for text variables while in Python 2, you use normally the type "str" for text. "str" means no unicode but encoded text. When the Java-LDAP bridge passes text to the LDAP server, it must encode the text - and maybe, it uses the correct encoding (the one the LDAP server expects). The Python-LDAP bridge, on the other hand, does not get unicode but "str" and likely passes the "str" values directly. Thus, if your "str" values do not use the correct encoding (the one expected by the LDAP server), things will not work out correctly. I expect the LDAP server to expect the "utf-8" encoding. In this case, problems could be expected when the data passed on to the LDAP server contains non ascii characters while all ascii data should not see problems. -- Dieter -- http://mail.python.org/mailman/listinfo/python-list
