Re: building 3.7.1 from source, _ctypes and libffi troubles

>> And as far as I know pkg-config is used by python's configure script >> so everything should be fine. I also set >> LD_LIBRARY_PATH=/home/fetch/opt/lib:/home/fetch/opt/lib64 and also >> C_INCLUDE_PATH=/home/fetch/opt/include > > I looked into this a little. I found that setting C_INCLUDE_PATH as

Re: building 3.7.1 from source, _ctypes and libffi troubles

On 12/20/18, Fetchinson . wrote: > Hi all, I'm trying to build 3.7.1 from source and having trouble with > libffi and _ctypes. I'm on linux and have installed libffi also from > source to a custom location: > > $HOME/opt/lib64/libffi.so.6.0.4 > $HOME/opt/lib64/libffi.a

building 3.7.1 from source, _ctypes and libffi troubles

Hi all, I'm trying to build 3.7.1 from source and having trouble with libffi and _ctypes. I'm on linux and have installed libffi also from source to a custom location: $HOME/opt/lib64/libffi.so.6.0.4 $HOME/opt/lib64/libffi.a $HOME/opt/lib64/libffi.la $HOME/opt/lib64/libffi.so.6 $HOME/opt/lib64/lib

Re: So apparently I've been banned from this list

On 10/1/18, Roel Schroeven wrote: > jkn schreef op 1/10/2018 om 20:25: >> On Monday, October 1, 2018 at 6:57:30 PM UTC+1, Ethan Furman wrote: >>> On 09/30/2018 09:30 AM, Steven D'Aprano wrote: >>> Notwithstanding Ethan's comment about having posted the suspension notice on the list,

Re: compiling 3.7.0 from source with custom libffi path

On 9/24/18, Thomas Jollans wrote: > On 2018-09-24 16:30, Fetchinson . via Python-list wrote: >> [fetch@fetch]$ grep LIBFFI_INCLUDE Makefile >> LIBFFI_INCLUDEDIR= /opt/custom/lib/libffi-3.2.1/include >> >> So I'd say everything should work but it doesn't,

Re: compiling 3.7.0 from source with custom libffi path

On 9/24/18, Thomas Jollans wrote: > On 2018-09-24 14:14, Fetchinson . via Python-list wrote: >>>> I'm trying to compile python 3.7.0 from source with a custom libffi >>>> path and the compiler/linker doesn't seem to pick up the right >>>> versio

Re: compiling 3.7.0 from source with custom libffi path

>> I'm trying to compile python 3.7.0 from source with a custom libffi >> path and the compiler/linker doesn't seem to pick up the right >> version. The system libffi doesn't have the development files so I've >> installed the latest libffi (also from source) to /opt/custom but >> still I get >> >>

compiling 3.7.0 from source with custom libffi path

I'm trying to compile python 3.7.0 from source with a custom libffi path and the compiler/linker doesn't seem to pick up the right version. The system libffi doesn't have the development files so I've installed the latest libffi (also from source) to /opt/custom but still I get INFO: Could not loc

Re: How to make python pick up my new-and-shiny openssl shared object

On 8/8/18, Christian Heimes wrote: > On 2018-08-08 00:07, Fetchinson . via Python-list wrote: >> The highest version of openssl available on my system is 1.0.0 which >> is not good enough for pip these days (or github for that matter). So >> I've installed 1.1.0 to a c

How to make python pick up my new-and-shiny openssl shared object

The highest version of openssl available on my system is 1.0.0 which is not good enough for pip these days (or github for that matter). So I've installed 1.1.0 to a custom location /home/fetch/opt. But if I do import ssl ssl.OPENSSL_VERSION it still shows me that it is using the system default 1.

Re: why does memory consumption keep growing?

On 10/5/17, Chris Angelico wrote: > On Fri, Oct 6, 2017 at 8:06 AM, Fetchinson . via Python-list > wrote: >> Hi folks, >> >> I have a rather simple program which cycles through a bunch of files, >> does some operation on them, and then quits. There are 500 files

why does memory consumption keep growing?

Hi folks, I have a rather simple program which cycles through a bunch of files, does some operation on them, and then quits. There are 500 files involved and each operation takes about 5-10 MB of memory. As you'll see I tried to make every attempt at removing everything at the end of each cycle so

Re: non-standard glibc location

On 9/7/17, Thomas Jollans wrote: > On 2017-09-06 16:14, Fetchinson . via Python-list wrote: >> Hi folks, >> >> I'm trying to install a binary package (tensorflow) which contains >> some binary C extensions. Now my system glibc is 2.15 but the binaries >

non-standard glibc location

Hi folks, I'm trying to install a binary package (tensorflow) which contains some binary C extensions. Now my system glibc is 2.15 but the binaries in the C extensions were created (apparently) with glibc 2.17. So I thought no problemo I installed glibc 2.17 to a custom location, built python2.7 f

Re: web facing static text db

On 4/30/16, Gordon Levi wrote: > "Fetchinson ." wrote: > >>Hi folks, >> >>I have a very specific set of requirements for a task and was >>wondering if anyone had good suggestions for the best set of tools: >> >>* store text documents (about

web facing static text db

Hi folks, I have a very specific set of requirements for a task and was wondering if anyone had good suggestions for the best set of tools: * store text documents (about 10 pages) * the data set is static (i.e. only lookups are performed, no delete, no edit, no addition) * only one operation

Re: smart scheduling for webapp tester

On 5/12/15, Chris Angelico wrote: > On Tue, May 12, 2015 at 6:31 AM, Fetchinson . > wrote: >> I'm looking into a robust solution for web application testing. While >> selenium is great for the actual testing, I'm thinking of a scheduler >> as the final piece i

smart scheduling for webapp tester

I'm looking into a robust solution for web application testing. While selenium is great for the actual testing, I'm thinking of a scheduler as the final piece in the pipeline. Let's say I have 4 websites that I need to test periodically, A, B, C, D. I'd like to be able to define things like "run th

Re: Great Math Mystery

>> In an altercation with the police, complying with their orders greatly >> increases your chances of survival. > > Ah, the definition of a police state: where ordinary people, whether > breaking the law or not, are forced by fear of death to obey the police at > all times, whether the police are

Re: Python 2 to 3 conversion - embrace the pain

On 3/15/15, Mark Lawrence wrote: > On 15/03/2015 19:05, John Nagle wrote: >> On 3/14/2015 1:00 AM, Marko Rauhamaa wrote: >>> John Nagle : I'm approaching the end of converting a large system from Python 2 to Python 3. Here's why you don't want to do this. >>> >>> A nice report, thanks

python on mobile mailing list

Hi all, the mobile-sig mailing list is alive: https://mail.python.org/pipermail/mobile-sig/2015-January/thread.html If you are interested in python on smart phones that's the place to go! Cheers, Daniel -- Psss, psss, put it down! - http://www.cafepress.com/putitdown -- https://mail.python.o

Re: Python Sanity Proposal: Type Hinting Solution

On 1/24/15, Steven D'Aprano wrote: > Fetchinson . wrote: > >> On 1/23/15, Steven D'Aprano wrote: > [...] >>> Cobra is especially close to Python-like syntax, and supports unit tests >>> as well: >>> >>> >>>

Re: Python Sanity Proposal: Type Hinting Solution

On 1/23/15, Chris Angelico wrote: > On Sat, Jan 24, 2015 at 12:23 AM, Fetchinson . > wrote: >> In any case, I'm pretty sure it was said before, but I can't really >> find it anywhere, can someone tell me what the rationale is for >> *function signature* type

Re: Python Sanity Proposal: Type Hinting Solution

On 1/23/15, Steven D'Aprano wrote: > Terry Reedy wrote: > >> On 1/22/2015 10:59 PM, Chris Angelico wrote: >>> On Fri, Jan 23, 2015 at 2:22 PM, Terry Reedy wrote: This idea is so brilliant that it is already an option in mypy and is part of the new type-hint proposal. The separate

Re: Future of python on android

On 12/26/14, iMath wrote: > 在 2014年12月25日星期四UTC+8下午11时31分24秒，Fetchinson .写道： >> Hi all, >> >> I was using sl4a for quite some time on android and it basically >> worked very well although some features are missing. It looks like >> sl4a is dead, altho

Re: Future of python on android

On 12/26/14, Steven D'Aprano wrote: > Fetchinson . wrote: > >> Guido is still working at google, right? > > > No. Google is still using Python for lots of things, but Guido is now > working for Dropbox. > > https://www.python.org/~guido/ Thanks, I missed the t

Re: Future of python on android

efully it will be around for a while and won't evaporate like sl4a :) Cheers, Daniel > According to wikipedia http://en.wikipedia.org/wiki/Guido_van_Rossum Guido > works for dropbox. > > Billy > > On Thu, Dec 25, 2014 at 9:31 AM, Fetchinson . > wrote: > >> H

Future of python on android

Hi all, I was using sl4a for quite some time on android and it basically worked very well although some features are missing. It looks like sl4a is dead, although I could be wrong. Does anyone knowledgeable have any further info on the future of sl4a? For instance it doesn't work with android 5 an

Re: If One Line

> Is it possible in python: > > if ((x = a(b,c)) == 'TRUE'): > print x Nope. Assignment is not allowed in a conditional. Cheers, Daniel > Thanks. > -- > https://mail.python.org/mailman/listinfo/python-list > -- Psss, psss, put it down! - http://www.cafepress.com/putitdown -- https://m

Re: Do you like the current design of python.org?

On 12/9/14, Ethan Furman wrote: > On 12/05/2014 03:30 AM, Fetchinson responded to >> Steven D'Aprano's rant of: >>> >>> Many links are broken. When you click on the broken link, it says that >>> it >>> has been reported and will be fixed, but

Re: Do you like the current design of python.org?

>> > Many links are broken. When you click on the broken link, it says that > it >> > has been reported and will be fixed, but weeks later it remains broken, >> > e.g.: >> > >> > https://www.python.org/doc/essays/metaclasses/Eiffel.py >> >> What makes you think that this page is ought to return act

Re: Do you like the current design of python.org?

>> Lest it seem like I am agreeing with these complaints, I'd like to say: >> Either python goes this way or the way of Fortran and Cobol. > > You mean if Cobol had a shiny but disfunctional website we'd be using that > instead of Python? Why would he mean that? If !A implies !B, it does *not* fo

Re: Do you like the current design of python.org?

>> Did you ever hit the "Socialize" button? No, but it doesn't bother me. >> Are you eager to see the latest >> tweets when you are reading a PEP? No, but it doesn't bother me either. You can easily block twitter related things by a number of ways, firewalls, /etc/hosts, etc. >> Do you run away

Re: Iterate over text file, discarding some lines via context manager

On 11/28/14, Dave Angel wrote: > On 11/28/2014 10:04 AM, fetchinson . wrote: >> Hi all, >> >> I have a feeling that I should solve this by a context manager but >> since I've never used them I'm not sure what the optimal (in the >> python sense) solution

Iterate over text file, discarding some lines via context manager

Hi all, I have a feeling that I should solve this by a context manager but since I've never used them I'm not sure what the optimal (in the python sense) solution is. So basically what I do all the time is this: for line in open( 'myfile' ): if not line: # discard empty lines

Re: New to python, do I need an IDE or is vim still good enough?

> I'm new to python, got 10-20 years perl and C experience, all gained on unix > alike machines hacking happily in vi, and later on in vim. > > Now it's python, and currently mainly on my kubuntu desktop. Welcome to the club! > Do I really need a real IDE, as the windows guys around me say I do,

Re: pygnomevfs get_local_path_from_uri replacement

>> Hi folks, I realize this is slightly off topic and maybe belongs to a >> gnome email list but it's nevertheless python: >> >> I use an old python program that was written for gnome 2 and gtk 2 and >> uses the function get_local_path_from_uri. More specifically it uses >> gnomevfs.get_local_path_

pygnomevfs get_local_path_from_uri replacement

Hi folks, I realize this is slightly off topic and maybe belongs to a gnome email list but it's nevertheless python: I use an old python program that was written for gnome 2 and gtk 2 and uses the function get_local_path_from_uri. More specifically it uses gnomevfs.get_local_path_from_uri. Now wi

Re: unpacking first few items of iterable

Hi folks, I swear I used to know this but can't find it anywhere: What's the standard idiom for unpacking the first few items of an iterable whose total length is unknown? Something like a, b, c, _ = myiterable where _ could eat up a variable number

Re: unpacking first few items of iterable

>>Hi folks, I swear I used to know this but can't find it anywhere: >> >>What's the standard idiom for unpacking the first few items of an >>iterable whose total length is unknown? >> >>Something like >> >>a, b, c, _ = myiterable >> >>where _ could eat up a variable number of items, in case I'm onl

unpacking first few items of iterable

Hi folks, I swear I used to know this but can't find it anywhere: What's the standard idiom for unpacking the first few items of an iterable whose total length is unknown? Something like a, b, c, _ = myiterable where _ could eat up a variable number of items, in case I'm only interested in the

assign only first few items of a tuple/list

Hi folks, I swear I used to know this but can't find it anywhere. Say I have a list x = [ 1,2,3,4,5 ] and only care about the first two items. I'd like to assign the first two items to two variables, something like, a, b, _ = x but the above will not work, of course, but what is the common idiom

Re: can we append a list with another list in Python ?

> can we append a list with another list in Python ? using the normal routine > syntax but with a for loop ?? x = [1,2,3] y = [10,20,30] x.extend( y ) print x this will give you [1,2,3,10,20,30] which I guess is what you want. Cheers, Daniel -- Psss, psss, put it down! - http://www.cafepress

Re: system tray or notification area in python

>> So I thought I would write a brand new stand alone system tray or >> notification area in python. I guess I need to use gtk bindings or >> some such but don't really know what my options are. >> >> Where would I start something like this? >> Any pointers would be greatly

Re: Fwd: system tray or notification area in python

Hi folks, So I thought I would write a brand new stand alone system tray or notification area in python. I guess I need to use gtk bindings or some such but don't really know what my options are. Where would I start something like this? Any pointers would be great

Fwd: system tray or notification area in python

>> Hi folks, >> >> I'm using a stand alone window manager without gnome or kde or any >> other de. But I still would like to have a system tray or notification >> area and so far used stalonetray for this. Stalonetray is written in C >> and is a GTK application, works all right but sometimes it doe

system tray or notification area in python

Hi folks, I'm using a stand alone window manager without gnome or kde or any other de. But I still would like to have a system tray or notification area and so far used stalonetray for this. Stalonetray is written in C and is a GTK application, works all right but sometimes it doesn't. For instanc

Re: terminate called after throwing an instance of 'CABRTException'

>> I've noticed a strange thing with python lately: >> >> >> >> Python 2.6.2 (r262:71600, Aug 21 2009, 12:23:57) >> [GCC 4.4.1 20090818 (Red Hat 4.4.1-6)] on linux2 >> Type "help", "copyright", "credits" or "license" for more information. > def f(): print x >> ... > f() >> terminate called

terminate called after throwing an instance of 'CABRTException'

I've noticed a strange thing with python lately: Python 2.6.2 (r262:71600, Aug 21 2009, 12:23:57) [GCC 4.4.1 20090818 (Red Hat 4.4.1-6)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> def f(): print x ... >>> f() terminate called after throwing an instance o

Re: lambda in list comprehension acting funny

>> You should not be using lambda in this case >> .for x in [2, 3]: >> .funcs = [x**ctr for ctr in range( 5 )] >> .for p in range(5): >> .print x, funcs[p] >> .print > > If you change the requirements, it's always easy to solve problems. But > it is the wrong problem that you ha

Re: lambda in list comprehension acting funny

>>> funcs = [ lambda x: x**i for i in range( 5 ) ] >>> print funcs[0]( 2 ) >>> >>> This gives me >>> 16 >>> >>> When I was excepting >>> 1 >>> >>> Does anyone know why? > >Just the way Python lambda expressions bind their variable > references. Inner 'i' references the outer scope's 'i' variabl

Re: lambda in list comprehension acting funny

> funcs = [ lambda x: x**i for i in range( 5 ) ] > print funcs[0]( 2 ) > print funcs[1]( 2 ) > print funcs[2]( 2 ) > > This gives me > > 16 > 16 > 16 > > When I was excepting > > 1 > 2 > 4 > > Does anyone know why? And more importantly, what's the simplest way to achieve the latter? :) -- Psss,

lambda in list comprehension acting funny

funcs = [ lambda x: x**i for i in range( 5 ) ] print funcs[0]( 2 ) print funcs[1]( 2 ) print funcs[2]( 2 ) This gives me 16 16 16 When I was excepting 1 2 4 Does anyone know why? Cheers, Daniel -- Psss, psss, put it down! - http://www.cafepress.com/putitdown -- http://mail.python.org/mail

Re: Namespace hack

>> Funny, you got to the last line of "import this" but apparently >> skipped the second line: >> >> Explicit is better than implicit. >> >> And you didn't even post your message on April 1 so no, I can't laugh >> even though I'd like to. > > Can you be less condescending? Of course! :) Anyway, t

Re: Namespace hack

> >From the Zen of Python ("import this"): > > Namespaces are one honking great idea -- let's do more of those! > > > Inspired by this, I have a decorator that abuses function closures to > create a namespace type with the following properties: > > - all methods are static methods that do not take

Re: Open Source: you're doing it wrong - the Pyjamas hijack

> Blatantly the pyjs ownership change turned out to be an awkward > operation (as reactions on that ML show it), but a fork could also have > very harmfully "split" pyjs-interested people, so all in all I don't > think there was a perfect solution - dictatorships never fall harmlessly. You say "f

Re: Open Source: you're doing it wrong - the Pyjamas hijack

> the original goal was to purchase a domain and fork -- > i made this very clear in my notes -- `uxpy.net`. however, the most > respectable member of the commit IMO convinced me otherwise. (I'm a total outsider, never used pyjs.) Anthony, you never explained what the reasoning behind the advice

Re: Open Source: you're doing it wrong - the Pyjamas hijack

It's also quite ironic that the initial complaining started from how the domain name www.pyjs.org is not available only pyjs.org is. At the same time the Rebel Chief's listed domain name on github, see https://github.com/xtfxme, gives you a server not found: http://the.xtfx.me/ :) On 5/9/12, ant

Re: Fetching data from a HTML file

On 3/23/12, Sangeet wrote: > Hi, > > I've got to fetch data from the snippet below and have been trying to match > the digits in this to specifically to specific groups. But I can't seem to > figure how to go about stripping the tags! :( > > Sum class="green">24511 align='center'>02561.496 > [min]

Re: format a measurement result and its error in "scientific" way

>> Hi folks, often times in science one expresses a value (say >> 1.03789291) and its error (say 0.00089) in a short way by parentheses >> like so: 1.0379(9) > > Before swallowing any Python solution, you should > realize, the values (value, error) you are using are > a non sense : > > 1.03789291 +

Re: format a measurement result and its error in "scientific" way

>> Thanks, it's simpler indeed, but gives me an error for value=1.267, >> error=0.08: >> >> Traceback (most recent call last): >> File "/home/fetchinson/bin/format_error", line 26, in >>print format_error( sys.argv[1], sys.argv[2] ) >&

Re: format a measurement result and its error in "scientific" way

On 2/16/12, Ian Kelly wrote: > On Thu, Feb 16, 2012 at 1:36 AM, Daniel Fetchinson > wrote: >>>> Hi folks, often times in science one expresses a value (say >>>> 1.03789291) and its error (say 0.00089) in a short way by parentheses >>>> like so: 1.0379(9

Re: format a measurement result and its error in "scientific" way

>> Hi folks, often times in science one expresses a value (say >> 1.03789291) and its error (say 0.00089) in a short way by parentheses >> like so: 1.0379(9) >> >> One can vary things a bit, but let's take the simplest case when we >> only keep 1 digit of the error (and round it of course) and roun

format a measurement result and its error in "scientific" way

Hi folks, often times in science one expresses a value (say 1.03789291) and its error (say 0.00089) in a short way by parentheses like so: 1.0379(9) One can vary things a bit, but let's take the simplest case when we only keep 1 digit of the error (and round it of course) and round the value corre

Re: SQLObject 1.2.0

Thanks a million Oleg! Cheers, Daniel On 11/20/11, Oleg Broytman wrote: > Hello! > > I'm pleased to announce version 1.2.0, the first stable release of branch > 1.2 of SQLObject. > > > What is SQLObject > = > > SQLObject is an object-relational mapper. Your database tables are

OT

I'll be 59 in a couple of months. -- Psss, psss, put it down! - http://www.cafepress.com/putitdown -- http://mail.python.org/mailman/listinfo/python-list

Re: web hosting, first hand experiences?

>> Hi folks, I know this comes up regularly but the thing is that the >> quality of service changes also quite regularly with many of the >> hosting companies. What's currently the best option for shared hosting >> of a turbogears application? I'm thinking of dreamhost and webfaction >> does anyone

web hosting, first hand experiences?

Hi folks, I know this comes up regularly but the thing is that the quality of service changes also quite regularly with many of the hosting companies. What's currently the best option for shared hosting of a turbogears application? I'm thinking of dreamhost and webfaction does anyone have any recen

Re: New member intro and question

> > I'm a new list member from the United States. Long time programmer, > fairly new to Python and absolutely loving it so far! I'm 36, live in > Oklahoma, and own a small Linux software development and consulting > firm. Python has made my life a *lot* easier and, the more I learn, > the easier i

Re: Postmortem on Unladen Swallow

> There's a postmortem on the failure of Unladen Swallow by one of the > developers at: > > http://qinsb.blogspot.com/2011/03/unladen-swallow-retrospective.html This outcome of things is really a testament to the hard work of the pypy folks. They, a volunteer bunch, beat google! And that's somethi

Common practice for multiple python versions sharing 3rd party modules

Hi folks, In order to test my own modules with various python versions I've installed python 2.4, 2.5, 2.6, 2.7, 3.1, 3.2. The original installation on my fedora box was 2.6 and all 3rd party modules so far were installed under /usr/lib/python2.6/site-packages. Since now the executable 'python' po

Re: Fun python 3.2 one-liner

what is the character limit on a one liner :P. >>> >>> For PEP 8 compliance, 80 characters. :-) >> >> Yeah, but we don't live in the 80's or 90's anymore and our screens can >> support xterms (or let alone IDE widows) much wider than 80 characters. >> I'm using 140 for python these days. Serio

Re: Fun python 3.2 one-liner

>> what is the character limit on a one liner :P. > > For PEP 8 compliance, 80 characters. :-) Yeah, but we don't live in the 80's or 90's anymore and our screens can support xterms (or let alone IDE widows) much wider than 80 characters. I'm using 140 for python these days. Seriously, who would w

Re: Suggestion Reqd for Designing a Website in Python

>> >I have developed one big Machine Learning software a Machine >> >Translation system in Python. >> >Now, I am thinking to make a User Interface of it and upload it in a >> >web site. >> >> Do you mean you want people to download this from a web site as an >> executable, and then run it locally o

Re: Use the Source Luke

> For the Python world though, there does seem > to have been a change. A decade ago in this newsgroup, there were > frequent references to standard library source. I don't see that > much anymore. Popularity has a price. A decade ago only hackers were exposed to python who are happy to chat abo

Re: Interesting bug

> Dear Group, > > Hope all of you are fine and spending nice new year evenings. > > I get a bug in Python over the last 4 years or so, since I am using > it. The language is superb, no doubt about it. It helped me finish > many a projects, with extraordinary accuracy. But long since, I was > gettin

Re: Interning own classes like strings for speed and size?

>> I believe what you are looking for is (some variant of) the singleton >> pattern: >> >> http://en.wikipedia.org/wiki/Singleton_pattern > > Actually, no. What I want is the flyweight pattern instead: > > http://en.wikipedia.org/wiki/Flyweight_pattern Oh I see. I did not know about this pattern,

Re: Interning own classes like strings for speed and size?

> I'm trying to solve a computational problem and of course speed and size is > important there. Apart from picking the right algorithm, I came across an > idea that could help speed up things and keep memory requirements down. What > I have is regions described by min and max coordinates. At first

Re: Python Web App

Anybody know where I can find a Python Development Environment in the form of a web app for use with Chrome OS. I have been looking for a few days and all i have been able to find is some old discussions with python developers talking about they will want one for the OS to be a

Re: Added Python, WSGI to XAMPP

> How-To: Add VirtualEnv and Pylons (WSGI framework) to XAMPP > >>> >>> Maybe, if there's no Zope. Or we'll run away screaming... >> >> That is rather pathetically true... >> >> Ah well, each to their own... >> >> Chris >> > What

Re: inverse of a matrix with Fraction entries

>> > I wouldn't do it that way. Let M be your matrix. Work out the LCM l of >> > the denominators, and multiply the matrix by that to make it an integer >> > matrix N = l M. Then work out the determinant d of that integer matrix. >> > Next, the big step: use Gaussian elimination to find a matrix

Re: inverse of a matrix with Fraction entries

>> So after all I might just code the inversion via Gauss elimination >> myself in a way that can deal with fractions, shouldn't be that hard. > > I wouldn't do it that way. Let M be your matrix. Work out the LCM l of > the denominators, and multiply the matrix by that to make it an integer > mat

Re: inverse of a matrix with Fraction entries

>> It's a mathematical problem so no uncertainty is present in the >> initial values. And even if there was, if there are many orders of >> magnitude differences between the entries in the matrix floating point >> does not suffice for various things like eigenvalue calculation and >> stuff like tha

Re: inverse of a matrix with Fraction entries

>> I'm using fractions.Fraction as entries in a matrix because I need to >> have very high precision and fractions.Fraction provides infinite >> precision . . . >> >> Probably it doesn't matter but the matrix has all components non-zero >> and is about a thousand by thousand in size. > > I wonder h

Re: inverse of a matrix with Fraction entries

I guess this is a question to folks with some numpy background (but not necessarily). I'm using fractions.Fraction as entries in a matrix because I need to have very high precision and fractions.Fraction provides infinite precision (as I've learned from advice from thi

Re: inverse of a matrix with Fraction entries

>> I guess this is a question to folks with some numpy background (but >> not necessarily). >> >> I'm using fractions.Fraction as entries in a matrix because I need to >> have very high precision and fractions.Fraction provides infinite >> precision (as I've learned from advice from this list). > >

inverse of a matrix with Fraction entries

I guess this is a question to folks with some numpy background (but not necessarily). I'm using fractions.Fraction as entries in a matrix because I need to have very high precision and fractions.Fraction provides infinite precision (as I've learned from advice from this list). Now I need to calcul

Re: what's the precision of fractions.Fraction?

>> I do a recursive evaluation of an expression involving fractions and >> unsurprisingly the numerator and denominator grows pretty quickly. >> After 10-20 iterations the number of digits in the numerator and >> denominator (as integers) reaches 80-100. And I'm wondering until what >> point I can

what's the precision of fractions.Fraction?

I do a recursive evaluation of an expression involving fractions and unsurprisingly the numerator and denominator grows pretty quickly. After 10-20 iterations the number of digits in the numerator and denominator (as integers) reaches 80-100. And I'm wondering until what point I can trust the resul

Re: Am I The Only One Who Keeps Reading “Numpy” as “Numpty”?

As in Numpty Dumpty? > Sorry... -- Psss, psss, put it down! - http://www.cafepress.com/putitdown -- http://mail.python.org/mailman/listinfo/python-list

Re: ANN: PyGUI 2.3

>> The problem is that some part of the application gets installed to >> >> /home/fetchinson/.local/lib/python2.6/site-packages/GUI >> >> and some other parts get installed to >> >> /home/fetchinson/.local/lib/python/site-packages/GUI > > Which par

Re: cms 4 static pages?

> m looking 4 a framework, that allows to build static community software > (similar to facebook) without having to start scripts, database > connects, admin cookies, e.t.c. > > means - should be dynamic without really being dynamic, delivering just > static pages. (yes, i know e.g. nginx does that

Re: playful coding problems for 10 year olds

>> Hi folks, >> >> My niece is interested in programming and python looks like a good >> choice (she already wrote a couple of lines :)) She is 10 and I >> thought it would be good to have a bunch of playful coding problems >> for her, stuff that she could code herself maybe after some initial >> h

playful coding problems for 10 year olds

Hi folks, My niece is interested in programming and python looks like a good choice (she already wrote a couple of lines :)) She is 10 and I thought it would be good to have a bunch of playful coding problems for her, stuff that she could code herself maybe after some initial help. Do you guys kn

Re: ANN: PyGUI 2.3

> and have a highly Pythonic API. Installation to a custom location with python setup.py install --home=/home/fetchinson/.local makes GUI un-importable: [fetchin...@fetch ~]$ python Python 2.6.2 (r262:71600, Aug 21 2009, 12:23:57) [GCC 4.4.1 20090818 (Red Hat 4.4.1-6)] on linux2 Type "help"

Re: ANN: PyGUI 2.3

> PyGUI 2.3 is available: > >http://www.cosc.canterbury.ac.nz/greg.ewing/python_gui/ > > This version works on Snow Leopard with PyObjC 2.3. Any reason your project is not easy_installable? Cheers, Daniel -- Psss, psss, put it down! - http://www.cafepress.com/putitdown -- http://mail.pyth

Re: [OFF] sed equivalent of something easy in python

>> using python. The pattern is that the first line is deleted, >> then 2 lines are kept, 3 lines are deleted, 2 lines are kept, >> 3 lines are deleted, etc, etc. > > If you have GNU sed, you can use > >sed -n '2~5{N;p}' > > which makes use of the GNU "~" extension. If you need a more > portabl

[OFF] sed equivalent of something easy in python

This question is really about sed not python, hence it's totally off. But since lots of unix heads are frequenting this list I thought I'd try my luck nevertheless. If I have a file with content 1 2 3 4 5 6 7 8 ... i.e. each line contains simply its line number, then it's quite easy to conve

Does everyone keep getting recruiting emails from google?

I keep getting recruiting emails from charlesngu...@google.com about working for google as an engineer. The messages are pretty much the same and go like this: I am part of the Google Staffing team and was wondering if you would be open to exploring engineering

Re: how do I search python mailing list archives?

> What are the various ways to search the python mailing list archives? If you are searching for 'foo' and 'bar' you can try this in google: foo bar site:mail.python.org inurl:python-list Cheers, Daniel -- Psss, psss, put it down! - http://www.cafepress.com/putitdown -- http://mail.python.or

  1   2   3   4   5   >