subprocess.Popen - file like object from stdout=PIPE

e.g. EQ_OUT so that I can loop over the lines of it like for line in EQ_OUT : ... I could use StringIO.StringIO applied to EQ_output but this reads all of the command's output into a big string first. On Unix/Linux a pipe is a file-like object after all, so how to get hold of it. Ma

Re: subprocess.Popen - file like object from stdout=PIPE

Chris Rebert wrote: On Wed, Feb 4, 2009 at 1:22 AM, Helmut Jarausch wrote: Hi, using e.g. import subprocess Package='app-arch/lzma-utils' EQ=subprocess.Popen(['/usr/bin/equery','depends',Package],stdout=subprocess.PIPE) EQ_output= EQ.communicate()[0] EQ_output i

Re: subprocess.Popen - file like object from stdout=PIPE

Clovis Fabricio wrote: 2009/2/4 Helmut Jarausch : using e.g. import subprocess Package='app-arch/lzma-utils' EQ=subprocess.Popen(['/usr/bin/equery','depends',Package],stdout=subprocess.PIPE) EQ_output= EQ.communicate()[0] EQ_output is a string containing multiple

Re: subprocess.Popen - file like object from stdout=PIPE

Clovis Fabricio wrote: 2009/2/4 Helmut Jarausch : EQ.stdout is the filelike object you're looking for. communicate() grabs entire output at once so don't use it. Thanks a lot, I haven't found that in the official documentation. Helmut. That would be a documentation bug. Fortun

double import protection - how to ?

st be executed only once, initializes another OS-thread (java in my case)) Many thanks for a hint, Helmut Jarausch Lehrstuhl fuer Numerische Mathematik RWTH - Aachen University D 52056 Aachen, Germany -- http://mail.python.org/mailman/listinfo/python-list

Re: double import protection - how to ?

Peter Otten wrote: Helmut Jarausch wrote: I have a module which gets imported at several different places not all of which are under my control. How can I achieve that all/some statements within that module get executed only at the very first import? What you describe is Python's de

Re: double import protection - how to ?

Peter Otten wrote: Helmut Jarausch wrote: Peter Otten wrote: Helmut Jarausch wrote: Then it's a problem with a problem with a webserver written in Python (Karrigell-3.0) and probably related to multi-threading (the statements in my module get definitely executed more than once).

Is it safe to modify the dict returned by vars() or locals()

parms) : for N in VList : if N in parms : vars()[N]= parms[N] else : vars()[N]= None Does this work, is it typical Python? Many thanks for a hint, Helmut. -- Helmut Jarausch Lehrstuhl fuer Numerische Mathematik RWTH - Aachen University D 52056 Aachen, Germany -- http://mail.python.org/mailman/listinfo/python-list

Re: Is it safe to modify the dict returned by vars() or locals()

Chris Rebert wrote: On Mon, Dec 1, 2008 at 1:01 PM, Helmut Jarausch <[EMAIL PROTECTED]> wrote: Hi, I am looking for an elegant way to solve the following problem: Within a function def Foo(**parms) I have a list of names, say VList=['A','B','C1'] an

Re: Is it safe to modify the dict returned by vars() or locals()

Duncan Booth wrote: Helmut Jarausch <[EMAIL PROTECTED]> wrote: Chris Rebert wrote: On Mon, Dec 1, 2008 at 1:01 PM, Helmut Jarausch <[EMAIL PROTECTED]> wrote: Hi, I am looking for an elegant way to solve the following problem: Within a function def Foo(**parms) I have a l

python3.0 - any hope it will get faster?

ame war! I know computers get faster, we human beings don't (me, at least) -- Helmut Jarausch Lehrstuhl fuer Numerische Mathematik RWTH - Aachen University D 52056 Aachen, Germany -- http://mail.python.org/mailman/listinfo/python-list

python3 - the hardest hello world ever ?

ython") Thanks for any enlightening on that subject, Helmut. -- Helmut Jarausch Lehrstuhl fuer Numerische Mathematik RWTH - Aachen University D 52056 Aachen, Germany -- http://mail.python.org/mailman/listinfo/python-list

Re: python3 - the hardest hello world ever ?

Ben Finney wrote: Helmut Jarausch <[EMAIL PROTECTED]> writes: I have to set an internal property (with leading underscore) for each output file I'm using - right? If you're referring to the source encoding declaration: No, underscores have no effect. The specific

Re: python3 - the hardest hello world ever ?

Paul Boddie wrote: On 15 Okt, 12:08, Helmut Jarausch <[EMAIL PROTECTED]> wrote: What defines me as latin1-user? What does sys.stdout.encoding say? In Python 2.x, at least, that It says ansi_x3.4-1968 Where can I change this? attribute should reflect the capabilities of your envir

Re: python3 - the hardest hello world ever ?

odecs.ascii_encode(input, self.errors)[0] UnicodeEncodeError: 'ascii' codec can't encode characters in position 1-2: ordinal not in range(128) So my system seems to be an ASCII system? Thanks, Helmut -- Helmut Jarausch Lehrstuhl fuer Numerische Mathematik RWTH - Aachen University D

Re: python3 - the hardest hello world ever ?

Brian Quinlan wrote: Hey Helmut, Did you try just: print("Hallo, Süßes Python") Yes, but that doesn't work here. Please see my reply to Martin's reply. Thanks, Helmut. -- Helmut Jarausch Lehrstuhl fuer Numerische Mathematik RWTH - Aachen University D 52056 Aac

Re: python3 - the hardest hello world ever ?

very beginning of a script. Why isn't that possible? Helmut. -- Helmut Jarausch Lehrstuhl fuer Numerische Mathematik RWTH - Aachen University D 52056 Aachen, Germany -- http://mail.python.org/mailman/listinfo/python-list

Re: python3 - the hardest hello world ever ?

ither the 'locale' or to switch settings for each output file (by settting the _encoding property. I wished I could override the locale settings within a Python script. Thanks, Helmut. -- Helmut Jarausch Lehrstuhl fuer Numerische Mathematik RWTH - Aachen University D 52056 Aachen,

Re: python3 - the hardest hello world ever ?

Paul Boddie wrote: On 16 Okt, 11:28, Helmut Jarausch <[EMAIL PROTECTED]> wrote: I meant setting the default encoding which is used by print (e.g.) when outputting the internal unicode string to a file. As far as I understood, currently I am fixed to setting either the 'locale&#x

Re: python3 - the hardest hello world ever ?

Ross Ridge wrote: Helmut Jarausch <[EMAIL PROTECTED]> wrote: # but this ugly one (to be done for each output file) sys.stdout._encoding='latin1' Is this writable "_encoding" attribute, with a leading underscore (_), documented anywhere? Does it actually wo

variable length tuple assignment

s there some shorthand for this? Many thanks for a hint, Helmut Jarausch Lehrstuhl fuer Numerische Mathematik RWTH - Aachen University D 52056 Aachen, Germany -- http://mail.python.org/mailman/listinfo/python-list

PyCrypto AES MODE_CBC - How to?

ES.new(PWD, AES.MODE_ECB) txt = 'ea523a664dabaa4476d31226a1e3bab0' c = crypt.encrypt(txt) txt_plain=crypt.decrypt(c) print txt_plain Unfortunately, txt_plain differs from txt - why? (Using MODE_ECB does work however) What am I missing? Many thanks for a hint, Helmut Jarausch Lehrstuhl fuer Numerisc

Re: PyCrypto AES MODE_CBC - How to?

Helmut Jarausch wrote: Hi, I've just tried to write a simple example using PyCrypto's AES (CBC mode) #!/usr/bin/python from Crypto.Cipher import AES PWD='abcdefghijklmnop' Initial16bytes='0123456789ABCDEF' crypt = AES.new(PWD, AES.MODE_CBC,Initial16bytes) # cry

Re: email scanning for X-Spam-Score

Peter Otten wrote: Helmut Jarausch wrote: my emails received from our mailing system contain a field like X-Spam-Score: -2.2 Given the full email message in 'msg' I've tried mailmsg = email.message_from_string(msg) SPAM_CORE = mailmsg['X-Spam-Score'] but it do

email scanning for X-Spam-Score

Many thanks for a hint, Helmut. -- Helmut Jarausch Lehrstuhl fuer Numerische Mathematik RWTH - Aachen University D 52056 Aachen, Germany -- http://mail.python.org/mailman/listinfo/python-list

subprocess - please enhance the documentation

urns None. So I have replaced this by tar_inp.close() tar_exit_code= TAR.wait() if tar_exit_code != 0 : print "some error messages" Perhaps a few lines telling about this would be helpful. Thanks, Helmut. -- Helmut Jarausch Lehrstuhl fuer Numerische Mathematik RWTH - Aachen University D 52056 Aachen, Germany -- http://mail.python.org/mailman/listinfo/python-list

Re: compressing short strings?

DMM code around but am not sure where to look. I'd ask in comp.compression where the specialists are listening and who are very helpful. -- Helmut Jarausch Lehrstuhl fuer Numerische Mathematik RWTH - Aachen University D 52056 Aachen, Germany -- http://mail.python.org/mailman/listinfo/python-list

Re: svg-chart 1.1 SVG Charting Library

Jason R. Coombs wrote: I'm pleased to announce svg-chart 1.1, the first public release of a library for generating Scalable Vector Graphic (SVG) charts. http://sourceforge.net/projects/py-svg This repository seems to be still empty? Helmut. -- Helmut Jarausch Lehrstuhl fuer Numer

Python and Harry Potter?

Hi, just to let you know ... Today I've got an email from Amazon recommending me Harry Potter and the Deathly Hallows and they told me why they recommended this book, because I've bought Core PYTHON Programming Didn't know, Harry Potter is a Python fan. -- Helmut Jarausch

Re: ANN: eGenix pyOpenSSL Distribution 0.7.0-0.9.8h-1

downloading the source doesn't work. Under requirements (to compile the source) there is mxbase version >= 3.0.1 which I couldn't find on your web server. Many thanks, Helmut Jarausch Lehrstuhl fuer Numerische Mathematik RWTH - Aachen University D 52056 Aachen, Germany -- http://mail.pytho

Re: Plotting Graphs using Gnuplot

import Plotting2 #The name of my file... Plotting2.plot( [(2,3), (3,4)], [(4,5), (5,6)], [(1,3), (4,8)] ) -- Helmut Jarausch Lehrstuhl fuer Numerische Mathematik RWTH - Aachen University D 52056 Aachen, Germany -- http://mail.python.org/mailman/listinfo/python-list

Python-3.0b1 build fails on Linux : _gestalt

Hi, trying to build Python-3.0b1 on my Gentoo Linux box fails with Failed to find the necessary bits to build these modules: _gestalt Looking at setup.py it seems that module '_gestalt' is only needed on Darwin but my build on Linux fails nevertheless. Thanks for any hints, Helmu

2to3 bug and question

/bin/python -O Is this a bug or a feature? Thanks for hint, Helmut Jarausch Lehrstuhl fuer Numerische Mathematik RWTH - Aachen University D 52056 Aachen, Germany -- http://mail.python.org/mailman/listinfo/python-list

[2to3] Bug converting import

ValueError: Attempted relative import in non-package thanks for looking into it, Helmut Jarausch Lehrstuhl fuer Numerische Mathematik RWTH - Aachen University D 52056 Aachen, Germany -- http://mail.python.org/mailman/listinfo/python-list

Re: Python internals question

is any Python guru that can help I would be most interested in your thoughts. Please have a look at http://effbot.org/zone/call-by-object.htm and http://rg03.wordpress.com/2007/04/21/semantics-of-python-variable-names-from-a-c-perspective/ -- Helmut Jarausch Lehrstuhl fuer Numerische Ma

append to a sublist - please help

Hi, I must be blind but I don't see what's going wrong with G=[[]]*2 G[0].append('A') G[1].append('B') print G[0] gives ['A', 'B'] as well as print G[1] I was expecting ['A'] and ['B'] respectively. Many thanks for en

Re: Unix Device File Emulation

n.activestate.com/ASPN/Cookbook/Python/Recipe/414771 http://mail.python.org/pipermail/python-list/2002-August/157510.html http://pyinotify.sourceforge.net/ -- Helmut Jarausch Lehrstuhl fuer Numerische Mathematik RWTH - Aachen University D 52056 Aachen, Germany -- http://mail.python.org/mailman/listinfo/python-list

Re: Script to convert Tcl scripts to Python?

r > math operations I asked a similar question some time ago. The summary was - don't do it! Instead, a Tcl interpreter could be loaded and given the job to do. I think that's similar to what Tkinter does. -- Helmut Jarausch Lehrstuhl fuer Numerische Mathematik RWTH - Aachen University D

Re: Regular Expression - Matching Multiples of 3 Characters exactly.

in, and scan for more genes. This would hypothetically yield different genes, since the frame would be shifted. As an alternative - if you do need speed - have a look at http://www.egenix.com/products/python/mxBase/mxTextTools/ Helmut. -- Helmut Jarausch Lehrstuhl fuer Numerische Mathematik

hashing an array - howto

know such a thing? Many thanks for a hint, Helmut Jarausch Lehrstuhl fuer Numerische Mathematik RWTH - Aachen University D 52056 Aachen, Germany -- http://mail.python.org/mailman/listinfo/python-list

check object being a compiled regular expression

,_sre.SRE_Pattern) and if isinstance(RX,re._sre.SRE_Pattern) both fail. Many thanks for a hint, Helmut Jarausch Lehrstuhl fuer Numerische Mathematik RWTH - Aachen University D 52056 Aachen, Germany -- http://mail.python.org/mailman/listinfo/python-list

Re: Best way to convert sequence of bytes to long integer

n Python 3.2a0) since hashlib.md5(key).digest() returns a byte string which has no .encode method. Just my 5 cents, Helmut. -- Helmut Jarausch Lehrstuhl fuer Numerische Mathematik RWTH - Aachen University D 52056 Aachen, Germany -- http://mail.python.org/mailman/listinfo/python-list

Syntax question

group(*choices) + '?' with: TypeError: group() argument after ** must be a mapping, not tuple I'm afraid I don't understand this error message. BTW I'm using python-2.6.3 on the machine where I try to install 3.2a Many thanks for a hint, Helmut. -- Helmut Jarausch Lehrstuhl fuer

Re: Syntax question

Benjamin Peterson wrote: Helmut Jarausch skynet.be> writes: Hi, I'm trying to build the recent Python-3.2a (SVN). It fails in Lib/tokenize.py (line 87) How are you invoking it? As I said, it's 'make' in Python's source directory (SVN revision 75309 Last Chan

Re: Syntax question

Benjamin Peterson wrote: Helmut Jarausch skynet.be> writes: As I said, it's 'make' in Python's source directory (SVN revision 75309 Last Changed Date: 2009-10-10) I can't reproduce your failure. What are the exact commands you are using? CFLAGS='-O3 -mt

Python-3.2 (SVN) bug [was syntax question]

group(*choices) + '?' with: TypeError: group() argument after ** must be a mapping, not tuple Meanwhile I could narrow this down to the --with-tsc configure option. Without it, it builds just fine. Helmut. -- Helmut Jarausch Lehrstuhl fuer Numerische Mathematik RWTH - Aachen University D

pygtk - icons?

perhaps you need to install it. You can get a copy from: http://icon-theme.freedesktop.org/releases On my Gentoo system lots of packages have placed icons under /usr/share/icons/hicolor So, what am I missing. Many thanks for a hint, Helmut. -- Helmut Jarausch Lehrstuhl fuer Numerisch

Re: python regex "negative lookahead assertions" problems

tive lookahead and warning is in the string. '.*' eats all of line. Now, when at end of line, there is no 'warning' anymore, so it matches. What are you trying to achieve? If you just want to single out lines with 'ok' or warning in it, why not just if re.search(&

Re: python regex "negative lookahead assertions" problems

On 11/22/09 16:05, Helmut Jarausch wrote: On 11/22/09 14:58, Jelle Smet wrote: Hi List, I'm trying to match lines in python using the re module. The end goal is to have a regex which enables me to skip lines which have ok and warning in it. But for some reason I can't get negative

Re: Repost: Read a running process output

gt;> p1=Popen(['/usr/sunvts/bin/64/vtsk','-d'],stdout=PIPE) >>>> while 1: > ... a=p1.stdout.readline() > ... print a > ... I've tried #!/usr/bin/python import subprocess p1= subprocess.Popen(['/bin/ls','/LOCAL/'],stdout=subprocess.PIPE) for line in p1.stdout : print ">>>",line which works just fine. Are you sure, your /usr/sunvts/bin/64/vtsk writes a newline character (readline is waiting for that)? Helmut. -- Helmut Jarausch Lehrstuhl fuer Numerische Mathematik RWTH - Aachen University D 52056 Aachen, Germany -- http://mail.python.org/mailman/listinfo/python-list

Re: How to solve an LCP (linear complementarity problem) in python ?

2d contact forces in a rigid body > simulation. Sorry, I can't help you except pointing you to the Complementarity Problem Net http://www.cs.wisc.edu/cpnet/ -- Helmut Jarausch Lehrstuhl fuer Numerische Mathematik RWTH - Aachen University D 52056 Aachen, Germany -- http://mail.python.org/mailman/listinfo/python-list

import site fails - Please Help

Hi, I'm completely puzzled and I hope someone can shed some light on it. After cloning a running system, booting the new machine from a rescue CD, chroot to the new root partition, I get the following strange error from python upon startup python -v > import site failed st= os.stat(path) sta

getdefaultencoding - how to change this?

Hi, I've searched the net but didn't find the information I need. Using Python-2.7.1, I know, I can't modify defaultencoding at run time. Python even ignores export PYTHONIOENCODING=ISO8859-1 locale.getdefaultlocale()[1] returns 'ISO8859-1' still sys.stdout is using the ascii codec. How can I r

Re: getdefaultencoding - how to change this?

On Thu, 20 Jan 2011 14:31:09 +, Helmut Jarausch wrote: > Hi, > I've searched the net but didn't find the information I need. Using > Python-2.7.1, I know, I can't modify defaultencoding at run time. Python > even ignores > export PYTHONIOENCODING=ISO8859-1 &g

printing a list with non-ascii strings

Hi, I don't understand Python's behaviour when printing a list. The following example uses 2 German non-ascii characters. #!/usr/bin/python # _*_ coding: latin1 _*_ L=["abc","süß","def"] print L[1],L The output of L[1] is correct, while the output of L shows up as ['abc', 's\xfc\xdf', 'def'] H

Re: getdefaultencoding - how to change this?

On Thu, 20 Jan 2011 10:46:37 -0600, Robert Kern wrote: > On 1/20/11 8:31 AM, Helmut Jarausch wrote: >> Hi, >> I've searched the net but didn't find the information I need. Using >> Python-2.7.1, I know, I can't modify defaultencoding at run time. > > You

Re: Operations on sparse matrices

rse matrix. Note, in nearly all cases the inverse of a sparse matrix is a full matrix. Instead of inverting a matrix solve a linear system with that matrix. What do you need the inverse for? Helmut. -- Helmut Jarausch Lehrstuhl fuer Numerische Mathematik RWTH - Aachen University D 52056 Aach

Re: how to debug python application crashed occasionally

s yet. >> >> I will be really appreciated if somebody can help me about how to >> debug the python crashes. >> For me, it sounds like a hardware problem. Have run memory tests like memtest86+ and/or memtester? You could try a more recent version of Python like 2.6.5 and see if you get the same sort of errors. Try to run your application on a different machine if possible, to exclude hardware errors. Have you rebuild all Python packages you're using and which use an extension in C / C++ ? after upgrading? I hope this helps a bit, Helmut. -- Helmut Jarausch Lehrstuhl fuer Numerische Mathematik RWTH - Aachen University D 52056 Aachen, Germany -- http://mail.python.org/mailman/listinfo/python-list

External Hashing [was Re: matching strings in a large set of strings]

I think one could apply an external hashing technique which would require only very few disk accesses per lookup. Unfortunately, I'm now aware of an implementation in Python. Does anybody know about a Python implementation of external hashing? Thanks, Helmut. -- Helmut Jarausch Lehrstuhl

Re: HTTP server + SQLite?

application. This > is just for a proof-of-concept, so it doesn't need to be > shipping-quality. > You might have a look at http://www.karrigell.fr/doc/ Helmut. -- Helmut Jarausch Lehrstuhl fuer Numerische Mathematik RWTH - Aachen University D 52056 Aachen, Germany -- http://mail.python.org/mailman/listinfo/python-list

Re: Teaching Programming

f nearly each statement in Perl, that it is hard to understand and debug unless you're using it several hours a day (each day). What convinced me is clearly written in http://www.linuxjournal.com/article/3882 Please have a look at it, Helmut. (I'm teaching programming for more than 15

Re: fast regex

On 05/06/10 16:52, james_027 wrote: > hi, > > I was working with regex on a very large text, really large but I have > time constrained. Does python has any other regex library or string > manipulation library that works really fast? Have a look at http://www.egenix.com/products/python/mxBase/mx

convert Dbase (.dbf) files to SQLite databases

s for a hint, Helmut. -- Helmut Jarausch Lehrstuhl fuer Numerische Mathematik RWTH - Aachen University D 52056 Aachen, Germany -- http://mail.python.org/mailman/listinfo/python-list

How to search this newsgroup by a python script.

Hi, I haven't found anything with Google's group search, so let me ask it (again?). How can I search this newsgroup from within a Python script. (Perhaps by searching Google Groups or Gmane by some Python code.) Many thanks for a hint, Helmut. -- Helmut Jarausch Lehrstuhl fuer

importing site fails - why?

Hi, as often before, I've cloned a working system (GenToo) onto another machine. There, from a livecd and chroot to the cloned root partition python -v import site fails with the following error Python 2.6.6 (r266:84292, Oct 13 2010, 09:06:24) [GCC 4.4.4] on linux2 Type "help", "copyright", "cr

Re: importing site fails - why?

On Fri, 12 Nov 2010 19:42:46 +0100, Stefan Sonnenberg-Carstens wrote: > Am 12.11.2010 19:32, schrieb Helmut Jarausch: >> Hi, >> >> as often before, I've cloned a working system (GenToo) onto another >> machine. There, from a livecd and chroot to the cloned root par

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