Re: Balanced trees

Steven D'Aprano : > Proof: I create a hash table that accepts unsigned bytes as keys, where The O(f(n)) notation has no meaning when n is limited. This thing is not just pedantry. The discussion was how a balanced tree fares in comparison with hash tables. A simplistic O(1) vs O(log n) was pres

Re: golang OO removal, benefits. over python?

On Monday, March 10, 2014 10:19:20 AM UTC+5:30, flebber wrote: > I was wondering if a better programmer than I could explain if the removal of > OO features in golang really does offer an great benefit over python. That's a strange locution: You are suggesting that go had OOP and it was removed -

golang OO removal, benefits. over python?

I was wondering if a better programmer than I could explain if the removal of OO features in golang really does offer an great benefit over python. An article I was reading ran through a brief overview of golang in respect of OO features http://areyoufuckingcoding.me/2012/07/25/object-desorient

Re: Balanced trees

On Sun, 09 Mar 2014 18:04:46 -0600, Ian Kelly wrote: > On Sun, Mar 9, 2014 at 4:08 PM, Dan Stromberg > wrote: >> On Sun, Mar 9, 2014 at 2:43 PM, Marko Rauhamaa >> wrote: >>> Dan Stromberg : >>> On Sun, Mar 9, 2014 at 2:32 PM, Marko Rauhamaa wrote: > There is no O(1) hash table. >>

Re: Balanced trees

On Sun, 09 Mar 2014 23:32:54 +0200, Marko Rauhamaa wrote: > Dan Stromberg : > >> This is not just a detail: O(1) tends to be beat O(logn) pretty easily >> for large n. > > There is no O(1) hash table. Of course there are. While it is true that hash tables *in general* are not *always* O(1), th

Windows installation problem with 3.3.5

It looks as if the upgrade from 3.3.4 to 3.3.5 has stolen my copies of py.exe and pyw.exe from c:\windows. Before I raise an issue on the bug tracker could someone please confirm this, as it wouldn't be the first time I've managed to screw something up. -- My fellow Pythonistas, ask not what

Re: gdb unable to read python frame information

On 10/03/2014 02:54, Wesley wrote: If you don't read the loop from the top, and don't tell me exactly what you want by just keep saying context, please ingore this post. Thanks. Wesley 在 2014年3月10日星期一UTC+8上午9时48分41秒，Mark Lawrence写道： On 10/03/2014 01:06, Wesley wrote: What's information do y

Re: gdb unable to read python frame information

If you don't read the loop from the top, and don't tell me exactly what you want by just keep saying context, please ingore this post. Thanks. Wesley 在 2014年3月10日星期一UTC+8上午9时48分41秒，Mark Lawrence写道： > On 10/03/2014 01:06, Wesley wrote: > > > What's information do you want? > > > > > > I told t

Re: Tuples and immutability

On Sun, 09 Mar 2014 17:42:42 -0600, Ian Kelly wrote: > On Sun, Mar 9, 2014 at 4:03 PM, Gregory Ewing > wrote: >> Note that it says "when possible", not "if the implementation feels >> like it". > > That's quite vague, and not much stronger a guarantee than "maybe". It's > technically "possible"

Re: gdb unable to read python frame information

On 10/03/2014 01:06, Wesley wrote: What's information do you want? I told the OS, gdb and python version. And my operation steps. What do you want more, then, I can type here. Wesley Context, you just keep sending messages like the above which on its own is meaningless. Why should anybod

Re: gdb unable to read python frame information

What's information do you want? I told the OS, gdb and python version. And my operation steps. What do you want more, then, I can type here. Wesley -- https://mail.python.org/mailman/listinfo/python-list

Re: better and user friendly IDE recommended?

On Mar 9, 2014, at 19:22, Martin Schöön wrote: > What you don't get as far as I can see is code completion, > syntax highlighting etc since Emacs is doing this with > respect to Orgmode and not the programming language you > use. Put (setq org-src-fontify-natively t) In your ~/.emacs or ~/.ema

Re: Balanced trees

On Sun, Mar 9, 2014 at 4:08 PM, Dan Stromberg wrote: > On Sun, Mar 9, 2014 at 2:43 PM, Marko Rauhamaa wrote: >> Dan Stromberg : >> >>> On Sun, Mar 9, 2014 at 2:32 PM, Marko Rauhamaa wrote: There is no O(1) hash table. >>> >>> http://stackoverflow.com/questions/2771368/can-hash-tables-really

Re: better and user friendly IDE recommended?

On Mar 9, 2014, at 19:58, Michael Weylandt wrote: > On Mar 9, 2014, at 19:22, Martin Schöön wrote: >> What you don't get as far as I can see is code completion, >> syntax highlighting etc since Emacs is doing this with >> respect to Orgmode and not the programming language you >> use. > > Put

Re: Tuples and immutability

On Sun, Mar 9, 2014 at 4:03 PM, Gregory Ewing wrote: > Ian Kelly wrote: >> >> In my view the second one is wrong. a += b should be understood as >> being equivalent to a = a + b, but with the *possible* and by no means >> guaranteed optimization that the operation may be performed in-place. > > >

Re: better and user friendly IDE recommended?

Den 2014-02-14 skrev Martin Schöön : > Den 2014-02-14 skrev Rustom Mody : >> On Friday, February 14, 2014 2:57:13 AM UTC+5:30, Martin Schöön wrote: >>> Den 2013-09-17 skrev rusi >>> > On Wednesday, September 11, 2013 7:44:04 PM UTC+5:30, >>> > mnishpsyched wrote: >>> > Just saw this >>> > http://

Re: Tuples and immutability

On 3/9/2014 6:03 PM, Gregory Ewing wrote: Ian Kelly wrote: In my view the second one is wrong. a += b should be understood as being equivalent to a = a + b, but with the *possible* and by no means guaranteed optimization that the operation may be performed in-place. This interpretation is at

Re: Making Labels from python

Many thanks for the moment. I will try reportlab the next days. Am 09.03.2014 22:29, schrieb Ulrich Goebel: Hallo, has anybody an idea how to make small formated documents redy to print with python? I would like to print address labels as firstname lastname street and number cip

Re: Making Labels from python

On 3/9/2014 5:29 PM, Ulrich Goebel wrote: Hallo, has anybody an idea how to make small formated documents redy to print with python? I would like to print address labels as firstname lastname street and number cip and city The best should be to form a PDF and send it to the label

Re: Making Labels from python

Ben Finney : > The most reliable “ready to print” document formats are: > > * plain text > * PDF You might also consider PostScript. It can be emitted from any programming language without any special support (and any special support would probably only get in the way). A possibility is also the

Re: Making Labels from python

On 9-3-2014 22:29, Ulrich Goebel wrote: > Hallo, > > has anybody an idea how to make small formated documents redy to print with > python? > > I would like to print address labels as > >firstname lastname >street and number >cip and city > > The best should be to form a PDF and sen

Re: Balanced trees

Dan Stromberg : > On Sun, Mar 9, 2014 at 2:43 PM, Marko Rauhamaa wrote: There is no O(1) hash table. > [...] > > it's still amortized O(1). So we are in perfect agreement. Hash tables are a useful family of techniques but involve quite a bit of cost/benefit heuristics. You can only claim O

Re: Making Labels from python

Ulrich Goebel writes: > has anybody an idea how to make small formated documents redy to print > with python? The most reliable “ready to print” document formats are: * plain text * PDF All others, AFAIK, are significantly less reliable for that purpose. The “ReportLab PDF library” is a compr

Re: Balanced trees

On Sun, Mar 9, 2014 at 2:43 PM, Marko Rauhamaa wrote: > Dan Stromberg : > >> On Sun, Mar 9, 2014 at 2:32 PM, Marko Rauhamaa wrote: >>> There is no O(1) hash table. >> >> http://stackoverflow.com/questions/2771368/can-hash-tables-really-be-o1 > > Please elaborate. A hash table of fixed size is O(

Re: Making Labels from python

On 03/09/2014 02:29 PM, Ulrich Goebel wrote: Hallo, has anybody an idea how to make small formated documents redy to print with python? I would like to print address labels as firstname lastname street and number cip and city The best should be to form a PDF and send it to the labe

Re: Tuples and immutability

Ian Kelly wrote: In my view the second one is wrong. a += b should be understood as being equivalent to a = a + b, but with the *possible* and by no means guaranteed optimization that the operation may be performed in-place. This interpretation is at odds with the Language Reference, section 6

Re: Balanced trees

Dan Stromberg : > On Sun, Mar 9, 2014 at 2:32 PM, Marko Rauhamaa wrote: >> There is no O(1) hash table. > > http://stackoverflow.com/questions/2771368/can-hash-tables-really-be-o1 Please elaborate. Marko -- https://mail.python.org/mailman/listinfo/python-list

Re: Balanced trees

On Sun, Mar 9, 2014 at 2:32 PM, Marko Rauhamaa wrote: > Dan Stromberg : > >> This is not just a detail: O(1) tends to be beat O(logn) pretty easily >> for large n. > > There is no O(1) hash table. http://stackoverflow.com/questions/2771368/can-hash-tables-really-be-o1 -- https://mail.python.org/

Making Labels from python

Hallo, has anybody an idea how to make small formated documents redy to print with python? I would like to print address labels as firstname lastname street and number cip and city The best should be to form a PDF and send it to the label printer. So the PDF could be given the page

Re: Balanced trees

Dan Stromberg : > This is not just a detail: O(1) tends to be beat O(logn) pretty easily > for large n. There is no O(1) hash table. Marko -- https://mail.python.org/mailman/listinfo/python-list

Re: Balanced trees

On Sun, Mar 9, 2014 at 1:27 AM, Marko Rauhamaa wrote: > Dan Stromberg : > >> On Sat, Mar 8, 2014 at 1:21 PM, Marko Rauhamaa wrote: >>> If I had to choose between a hash table and AVL (or RB) tree in the >>> standard library, it would definitely have to be the latter. It is more >>> generally usab

Re: Tuples and immutability

On Mon, Mar 10, 2014 at 6:57 AM, Joshua Landau wrote: > I would probably implement it closer to home. Inside > tuple.__getitem__, there would be something like > > if context_is_augmented_assignment(): > raise TypeError(message+warning) > else: > raise TypeError(message) >

Re: Tuples and immutability

On 9 March 2014 18:13, Chris Angelico wrote: > I think I see what you're saying here. But ignore "top-level"; this > should just be a part of the exception message, no matter what. I don't think I was clear, but yes. That. > What you're saying is that this should notice that it's doing an > augm

Re: image processing in python and opencv

On 03/09/2014 10:56 AM, Varsha Holla wrote: i have no idea how to retrieve indexed images stored in ordered dictionary, using its values like : blue,green,red mean along with contrast, energy, homogeneity and correlation. as i have calculated the euclidean distance and i don't know how to disp

Re: Problem using py-bt, py-locals, etc. during GDB debugging [solved]

On 3/9/2014 10:46 AM, Wesley wrote: I hit a problem alike yours. Cannot fix according your method. Here is snippet: root@localhost python]# gdb python 40290 GNU gdb (GDB) 7.7 Copyright (C) 2014 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later

Re: gdb unable to read python frame information

On 3/9/2014 10:57 AM, Mark Lawrence wrote: On 09/03/2014 03:49, Wesley wrote: Anybody has suggestions? Don't expect crazy things. Send suggestions to the right place (a gdb list for a gdb enhancement). This really makes me crazy... What makes you crazy? The supposed fact that GnuDeBug d

Re: Tuples and immutability

On Mon, Mar 10, 2014 at 4:54 AM, Joshua Landau wrote: > On 28 February 2014 14:43, Chris Angelico wrote: >> On Sat, Mar 1, 2014 at 1:41 AM, Joshua Landau wrote: >>> Would it be better to add a check here, such that if this gets raised >>> to the top-level it includes a warning ("Addition was inp

Re: Tuples and immutability

On 28 February 2014 14:43, Chris Angelico wrote: > On Sat, Mar 1, 2014 at 1:41 AM, Joshua Landau wrote: >> Would it be better to add a check here, such that if this gets raised >> to the top-level it includes a warning ("Addition was inplace; >> variable probably mutated despite assignment failur

image processing in python and opencv

i have no idea how to retrieve indexed images stored in ordered dictionary, using its values like : blue,green,red mean along with contrast, energy, homogeneity and correlation. as i have calculated the euclidean distance and i don't know how to display the images which are similar. thanks in a

Re: gdb unable to read python frame information

On 09/03/2014 03:49, Wesley wrote: Anybody has suggestions? This really makes me crazy... What makes you crazy? You keep sending messages with no context. We might be smart, but we're not (yet :) mind readers. -- My fellow Pythonistas, ask not what our language can do for you, ask what

Re: How is unicode implemented behind the scenes?

On 09/03/2014 10:32, Rustom Mody wrote: On Sunday, March 9, 2014 2:09:32 PM UTC+5:30, wxjm...@gmail.com wrote: Le dimanche 9 mars 2014 03:40:28 UTC+1, MRAB a écrit : On 2014-03-09 02:08, Dan Stromberg wrote: OK, I know that Unicode data is stored in an encoding on disk. But how is it stored in

Re: Problem using py-bt, py-locals, etc. during GDB debugging [solved]

I hit a problem alike yours. Cannot fix according your method. Here is snippet: root@localhost python]# gdb python 40290 GNU gdb (GDB) 7.7 Copyright (C) 2014 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later This is free software: you are

[RELEASED] Python 3.3.5

-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On behalf of the Python development team, I'm very happy to announce the release of Python 3.3.5. Python 3.3.5 includes fixes for these important issues: * a 3.3.4 regression in zipimport (see http://bugs.python.org/issue20621) * a 3.3.4 regression e

Re: How is unicode implemented behind the scenes?

On Sunday, March 9, 2014 2:09:32 PM UTC+5:30, wxjm...@gmail.com wrote: > Le dimanche 9 mars 2014 03:40:28 UTC+1, MRAB a écrit : > > On 2014-03-09 02:08, Dan Stromberg wrote: > > > OK, I know that Unicode data is stored in an encoding on disk. > > > But how is it stored in RAM? > > > I realize I sho

Re: Tuples and immutability

Ian Kelly : > In my view the second one is wrong. a += b should be understood as > being equivalent to a = a + b, but with the *possible* and by no means > guaranteed optimization that the operation may be performed in-place. Some call it an optimization, others call it a side effect. Anyway, th

Re: Balanced trees

Dan Stromberg : > On Sat, Mar 8, 2014 at 1:21 PM, Marko Rauhamaa wrote: >> If I had to choose between a hash table and AVL (or RB) tree in the >> standard library, it would definitely have to be the latter. It is more >> generally usable, has fewer corner cases and probably has an equal >> perfor

Re: Balanced trees

Roy Smith : > Marko Rauhamaa wrote: > >> If I had to choose between a hash table and AVL (or RB) tree in the >> standard library, it would definitely have to be the latter. It is more >> generally usable, has fewer corner cases and probably has an equal >> performance even in hash tables' sweet

Re: process.popen with Japanese args => UTF8 JAVA

On 09Mar2014 16:52, Jun Tanaka wrote: > I have tried to process.popen to run java program with Japanese language. > test.java is compiled with utf8 > '日本語' below means Japanese in Japanese. > but it does not work. Anyone who knows this matter well. Please help. > Jun > > python code>>

Re: How is unicode implemented behind the scenes?

Le dimanche 9 mars 2014 03:40:28 UTC+1, MRAB a écrit : > On 2014-03-09 02:08, Dan Stromberg wrote: > > > OK, I know that Unicode data is stored in an encoding on disk. > > > > > > But how is it stored in RAM? > > > > > > I realize I shouldn't write code that depends on any relevant > > > impl

Re: process.popen with Japanese args => UTF8 JAVA

Jun Tanaka writes: > I have tried to process.popen to run java program with Japanese language. > test.java is compiled with utf8 > '日本語' below means Japanese in Japanese. > but it does not work. What are you expecting to happen, and what happens instead? What error (if any) is produced? -- htt