Re: Large number multiplication

On Jul 7, 9:30 am, Ulrich Eckhardt wrote: > That said, I'm sure that the developers would accept a patch that switches > to a different algorithm if the numbers get large enough. I believe it > already doesn't use Karatsuba for small numbers that fit into registers, > too. I'm far from sure that

Re: Does hashlib support a file mode?

Phlip wrote: >> I worded that poorly. None is (AFAIK) the only instance of NoneType, but >> I should've clarified the difference.> The is operator does not compare >> types, it compares instances for identity. > > None is typesafe, because it's strongly typed. Everything in Python is strongly ty

Re: Serial & reset of the device

yorick wrote: > >I'm trying to access a hardware board of my company through a serial >connection using a Python script and the pyserial module. > >I use Python 2.7.1 with Ubuntu 11.04 (pyserial is the package python- >serial with version 2.5.2, http://pyserial.sourceforge.net/pyserial_api.html).

Python for science experiments

Hello, Just posting a link of a project using Python for doing science experiments. with regards ajith -- Dr. Ajith Kumar B.P. Scientist SG Inter-University Accelerator Centre Aruna Asaf Ali Marg New Delhi 110067 www.iuac.res.in Ph: (off) 91 11 26893955 (Ext.230)

Re: Implicit initialization is EVIL!

On 2011.07.07 12:29 PM, rantingrick wrote: > So you prefer to close a gazillion windows one by one? If so, why not > just code the GUI correctly from the start; by creating separate > transactions? Thereby reducing the number of windows a user must > juggle? FYI: You know the user complexity of a G

Finding duplicated photo

Hello, I came across the problem that Gwenview moves the photo from the camera memory by renaming them, but later I forgot which where moved. Then I tought about a small script in python, but I stumbled upon my ignorance on the way to do that. PIL can find similar pictures. I was thinking to re

Re: Finding duplicated photo

On 07/08/2011 07:29 AM, TheSaint wrote: Hello, I came across the problem that Gwenview moves the photo from the camera memory by renaming them, but later I forgot which where moved. Then I tought about a small script in python, but I stumbled upon my ignorance on the way to do that. PIL can fin

Re: Serial & reset of the device

On 07/08/2011 02:45 AM, Tim Roberts wrote: yorick wrote: I'm trying to access a hardware board of my company through a serial connection using a Python script and the pyserial module. The board to which I'm trying to connect works correctly with serial as some other guys did some TCL scripts t

Re: Does hashlib support a file mode?

On Jul 8, 12:42 am, Steven D'Aprano wrote: > Phlip wrote: > >> I worded that poorly. None is (AFAIK) the only instance of NoneType, but > >> I should've clarified the difference.> The is operator does not compare > >> types, it compares instances for identity. > > > None is typesafe, because it's

Re: Serial & reset of the device

On 2011-07-08, Tim Chase wrote: > On 07/08/2011 02:45 AM, Tim Roberts wrote: >> yorick wrote: >>> I'm trying to access a hardware board of my company through a serial >>> connection using a Python script and the pyserial module. >>> >>> The board to which I'm trying to connect works correctly wit

Re: Finding duplicated photo

Billy Mays wrote: > It worked surprisingly well even > with just the 64bit hash it produces. > I'd say that comparing 2 images reduced upto 32x32 bit seems too little to find if one of the 2 portrait has a smile referred to the other. I think it's about that mine and your suggestion are similar,

Re: Finding duplicated photo

On 07/08/2011 10:14 AM, TheSaint wrote: Billy Mays wrote: It worked surprisingly well even with just the 64bit hash it produces. I'd say that comparing 2 images reduced upto 32x32 bit seems too little to find if one of the 2 portrait has a smile referred to the other. I think it's about that

Re: making socket.getaddrinfo use cached dns

my /etc/resolv.conf says: # Dynamic resolv.conf(5) file for glibc resolver(3) generated by > resolvconf(8) > # DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN > nameserver 127.0.0.1 > search Dynex > But getaddrinfo still takes a lot of time for repeated queries. After instal

Re: Python-list Digest, Vol 94, Issue 52

Hi, I need help with a python script to monitor my wireless router internet usage using a Mac address and then backup the report files on the server. i would also like to create login access on the website to have users checkout their bandwidth usage...Please help anyone I'm a newbie in Python..

Re: Python-list Digest, Vol 94, Issue 52

On 07/08/2011 04:45 PM, Mapere Ali wrote: > Hi, > > I need help with a python script to monitor my wireless router > internet usage using a Mac address and then backup the report files on > the server. i would also like to create login access on the website to > have users checkout their bandwidth

Re: Finding duplicated photo

On 07/08/2011 01:29 PM, TheSaint wrote: > Hello, > > I came across the problem that Gwenview moves the photo from the camera > memory by renaming them, but later I forgot which where moved. > Then I tought about a small script in python, but I stumbled upon my > ignorance on the way to do that.

Re: Finding duplicated photo

On Fri, Jul 8, 2011 at 8:16 AM, Thomas Jollans wrote: > On 07/08/2011 01:29 PM, TheSaint wrote: > > Hello, > > > > I came across the problem that Gwenview moves the photo from the camera > > memory by renaming them, but later I forgot which where moved. > > Then I tought about a small script in p

Re: Finding duplicated photo

On 01/-10/-28163 02:59 PM, TheSaint wrote: Hello, I came across the problem that Gwenview moves the photo from the camera memory by renaming them, but later I forgot which where moved. Then I tought about a small script in python, but I stumbled upon my ignorance on the way to do that. PIL can

ANN: ActivePython 2.7.2.5 is now available

ActiveState is pleased to announce ActivePython 2.7.2.5, a complete, ready-to-install binary distribution of Python 2.7. http://www.activestate.com/activepython/downloads What's New in ActivePython-2.7.2.5 == New Features & Upgrades --- -

ANN: ActivePython 2.6.7.20 is now available

ActiveState is pleased to announce ActivePython 2.6.7.20, a complete, ready-to-install binary distribution of Python 2.6. http://www.activestate.com/activepython/downloads What's New in ActivePythonEE-2.6.7.20 = New Features & Upgrades

ANN: ActivePython 2.5.6.10 is now available

ActiveState is pleased to announce ActivePython 2.5.6.10, a complete, ready-to-install binary distribution of Python 2.5. http://www.activestate.com/activepython/downloads What's New in ActivePython-2.5.6.10 === New Features & Upgrades ---

Re: Implicit initialization is EVIL!

On Jul 7, 8:25 pm, Steven D'Aprano wrote: > rantingrick wrote: > > On Jul 7, 12:34 am, Gregory Ewing wrote: > >> The important thing is that it's okay for an app to stay > >> alive until its *last* top level window is closed. > > I partially disagree with Greg on this. This is not the only model:

Re: The end to all language wars and the great unity API to come!

On Jul 6, 7:45 am, Steven D'Aprano wrote: > sal migondis wrote: > > How could a belief be wrong? > I believe... Shifting from 'belief' to 'believe', the latter having a considerably wider semantic scope. After that, anything goes.. naturally. > you are a small glass of beer. Are you *actually

Re: The end to all language wars and the great unity API to come!

On Fri, Jul 8, 2011 at 1:05 PM, sal migondis wrote: >> I believe... > > Shifting from 'belief' to 'believe', the latter having a considerably > wider semantic scope. Wider how? Would you care to give an example of something that is believed but is not a belief? -- http://mail.python.org/mailman

ANN: psutil 0.3.0 released

Hi folks, I'm pleased to announce the 0.3.0 release of psutil: http://code.google.com/p/psutil === Major enhancements === * disk usage * mounted disk partitions * system per-cpu percentage utilization and times * per-process terminal * physical and virtual memory usage including percentage === N

String concatenation vs. string formatting

Is it bad practice to use this > logger.error(self.preset_file + ' could not be stored - ' + > sys.exc_info()[1]) Instead of this? > logger.error('{file} could not be stored - > {error}'.format(file=self.preset_file, error=sys.exc_info()[1])) Other than the case where a variable isn't a string (f

Re: String concatenation vs. string formatting

In Andrew Berg writes: > Is it bad practice to use this > > logger.error(self.preset_file + ' could not be stored - ' + > > sys.exc_info()[1]) > Instead of this? > > logger.error('{file} could not be stored - > > {error}'.format(file=self.preset_file, error=sys.exc_info()[1])) > Other than the

Re: String concatenation vs. string formatting

On 07/08/2011 04:18 PM, Andrew Berg wrote: Is it bad practice to use this logger.error(self.preset_file + ' could not be stored - ' + sys.exc_info()[1]) Instead of this? logger.error('{file} could not be stored - {error}'.format(file=self.preset_file, error=sys.exc_info()[1])) Other than th

Re: String concatenation vs. string formatting

On Fri, Jul 8, 2011 at 1:18 PM, Andrew Berg wrote: > Is it bad practice to use this > > logger.error(self.preset_file + ' could not be stored - ' + > > sys.exc_info()[1]) > Instead of this? > > logger.error('{file} could not be stored - > > {error}'.format(file=self.preset_file, error=sys.exc_info

Re: String concatenation vs. string formatting

On Fri, Jul 8, 2011 at 3:23 PM, Benjamin Kaplan wrote: > String formatting is the One Right Way here. It's fine to use string > concatenation for a few things, but the operation is O(n^2) because each > concat occurs one at a time: Python allocates space for a string the size of > the first 2 thin

Re: String concatenation vs. string formatting

John Gordon writes: > I prefer this usage: > > logger.error('%s could not be stored - %s' % \ > (self.preset_file, sys.exc_info()[1])) That can be improved by learning two things: * The backslash-linebreak is ugly and fragile, and almost never needed, since Python knows to continue a st

Re: String concatenation vs. string formatting

Andrew Berg writes: > Is it bad practice to use this > > logger.error(self.preset_file + ' could not be stored - ' + > > sys.exc_info()[1]) This is not necessarily bad practice, but there are not many points in its favour. It's inflexible and makes the eventual formatting harder to discern. > I

Re: String concatenation vs. string formatting

On Fri, Jul 8, 2011 at 3:50 PM, Ben Finney wrote: > * The ‘%’ string formatting operator is superseded in current Python > versions by the more flexible ‘format’ method of string objects. > AFAIK, % formatting is the only kind of formatting that works portably across all of CPythons 2.5, 2.6, 2.

Re: String concatenation vs. string formatting

Ben Finney writes: > logger.error( > '{0} could not be stored - {1}'.format( > (self.preset_file, sys.exc_info()[1])) > > I usually prefer to use named placeholders instead of positional, but > this duplicates your original. Ah, I see that the OP *did* use named placeholders.

Re: String concatenation vs. string formatting

On 2011.07.08 05:59 PM, Ben Finney wrote: > With the caveat that the formatting of that line should be using PEP 8 > indentation for clarity: PEP 8 isn't bad, but I don't agree with everything in it. Certain lines look good in chunks, some don't, at least to me. It's quite likely I'm going to be wr

CI and BDD with Python

Moving to Python from Ruby, first time poster. Anyone any opinions (non-religious) on investing time in Lettuce (www.lettuce.it) or Freshen (https://github.com/rlisagor/freshen#readme) for their BDD ? And for CI having been using Hudson for a while, any real advantages in a Python / Django wo

meaning of numpy.fft coefficients

the list generated by numpy is of form [ a+bi, c+di, ...] could anybody tell me the meaning of the coefficients a and b? I am very confused about fourier transform! information provided by numpy reference says Ak = Sum of a[m] * exp{-2*pi * i * m * k / n} for m from 0 to n-1 Which part is a and

Re: meaning of numpy.fft coefficients

Excerpts from Joey's message of Fri Jul 08 20:14:29 -0400 2011: > the list generated by numpy is of form [ a+bi, c+di, ...] > > could anybody tell me the meaning of the coefficients a and b? I am > very confused about fourier transform! > a+bi is a typical complex number. a is the real part, b i

Re: String concatenation vs. string formatting

* John Gordon (Fri, 8 Jul 2011 20:23:52 + (UTC)) > I prefer this usage: > > logger.error('%s could not be stored - %s' % \ > (self.preset_file, sys.exc_info()[1])) The syntax for formatting logging messages according to the documentation is: Logger.error(msg, *args) NOT Logger.erro

Re: CI and BDD with Python

mark curphey, 09.07.2011 01:41: And for CI having been using Hudson for a while, any real advantages in a Python / Django world for adopting something native like Trac and one of the CI plugins like Bitten? I warmly recommend Jenkins (i.e. Hudson) for anything CI. It gives you tons of plugin

Re: Implicit initialization is EVIL!

rantingrick wrote: > On Jul 7, 8:25 pm, Steven D'Aprano +comp.lang.pyt...@pearwood.info> wrote: >> rantingrick wrote: >> > On Jul 7, 12:34 am, Gregory Ewing wrote: >> >> The important thing is that it's okay for an app to stay >> >> alive until its *last* top level window is closed. >> >> I part

Re: Does hashlib support a file mode?

Phlip wrote: > On Jul 8, 12:42 am, Steven D'Aprano +comp.lang.pyt...@pearwood.info> wrote: >> Phlip wrote: >> >> I worded that poorly. None is (AFAIK) the only instance of NoneType, >> >> but I should've clarified the difference.> The is operator does not >> >> compare types, it compares instance

Re: String concatenation vs. string formatting

Andrew Berg wrote: > Is it bad practice to use this >> logger.error(self.preset_file + ' could not be stored - ' + >> sys.exc_info()[1]) > Instead of this? >> logger.error('{file} could not be stored - >> {error}'.format(file=self.preset_file, error=sys.exc_info()[1])) > > > Other than the case

Re: String concatenation vs. string formatting

Billy Mays wrote: > If it means anything, I think concatenation is faster. You are measuring the speed of an implementation-specific optimization. You'll likely get *very* different results with Jython or IronPython, or old versions of CPython, or even if you use instance attributes instead of lo

Re: String concatenation vs. string formatting

On Fri, Jul 8, 2011 at 11:30 PM, Steven D'Aprano wrote: > Billy Mays wrote: > >> If it means anything, I think concatenation is faster. > > You are measuring the speed of an implementation-specific optimization. > You'll likely get *very* different results with Jython or IronPython, or > old versi

Re: String concatenation vs. string formatting

On Sat, Jul 9, 2011 at 3:30 PM, Steven D'Aprano wrote: > It also doesn't generalise: only appends are optimized, not prepends. > > If you're interested in learning about the optimization: > > http://utcc.utoronto.ca/~cks/space/blog/python/ExaminingStringConcatOpt >From that page: "Also, this is o

Re: String concatenation vs. string formatting

On Sat, Jul 9, 2011 at 12:16 AM, Chris Angelico wrote: > Has the same optimization been implemented for Unicode? The page > doesn't mention Python 3 at all, and I would guess that the realloc > optimization would work fine for both types of string. Seems to be implemented for strs in 3.2, but not