Mailman 3 November 2005 - NumPy-Discussion

The file DEVELOPERS.TXT
by Colin J. Williams 21 Nov '05

21 Nov '05

scipy._import_tools.py has a comment referring to DEVELOPERS.TXT but I don't find it in the Windows download.

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OT: Enthought IT Admin Job Posting
by Travis N. Vaught 20 Nov '05

20 Nov '05

All, I'm posting this here in the hopes that someone that is passionate about python/numeric/scipy will "answer the call": `Enthought, Inc. <http://www.enthought.com>`__ (Austin, TX, USA) ==================================================================== **Job Description**: Position: IT Administrator --------------------------- Enthought is looking for an exceptional IT Administrator to manage the IT infrastructure for it's Austin, TX offices. This person will have a passion for supporting software development tools and environments. The target server platforms include Linux (RedHat and Fedora), Windows XP, and Solaris. Workstations are a mix of Windows and Linux. We're looking for an Admin that focuses on supporting software developers. Desired Skills and Capabilities: * B.S. in Computer Science of other related field (preferably not MIS) * 5+ Years Experience in Enterprise IT Administration Role * Ability to program or script in a programming language or shell - (Python, Perl and small C programs) * Ability to solve problems quickly and completely * Strong inter-personal and communication skills as well as a team player in a group of highly talented software developers * Willingness to pitch in wherever needed * Interested in making developer's lives easier Duties: * Perform installation, patching and other server maintenance to ensure security and stability of server infrastructure. * Maintain core infrastructure technologies such as Firewall, VPN, apache web server, mail server, NIS, NFS, DNS, DHCP, SSH, network-wide backups, RAID and Samba * Identify routine tasks and automate through shell/Python scripting * Perform on-call duties and out of hours maintenance as necessary * Configure Nortel phone system * Build RPMs for RH/FC Linux * Using development tools on Linux such as gcc/g++, make, autoconf, etc. * Working with Python and building & installing Python packages using distutils * Support developer tools such as SVN repositories, bug trackers, Software Project Management utilities Company: -------- Enthought is a scientific computing company located in downtown Austin, Texas. Founded in 2001, it has grown nearly 100% per year both in staff and revenue to become a stable and profitable technology company. This growth has been possible because of Enthought’s talented team and because of our commitment to developing quality software. We strive to combine advanced algorithm development with modern software practices, such as component based architectures, application scripting, and intuitive user interface design. We take a holistic approach to software development, in which architects and developers team with technical writers, human factors specialists, and project managers (always highly technical individuals) to develop a complete solution for our customers. Much of our work is based on the Python programming language, and we are actively engaged in open source development (www.scipy.org <http://www.scipy.org>). We’re lucky enough to work on interesting problems and are looking for talented people to join us. Some of our current efforts are in the areas of geophysics, electromagnetics, fluid dynamics, micro-rheology, CAD, 2-D and 3-D visualization, and others. All of these tools are developed as plug-ins into our Envisage "Scientific IDE" framework. * **Contact**: Travis N. Vaught, CEO * **E-mail contact**: jobs(a)enthought.com * **Web**: http://www.enthought.com/careers.htm -- ........................ Travis N. Vaught CEO Enthought, Inc. http://www.enthought.com ........................

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Real life examples
by Eduardo Stark 20 Nov '05

20 Nov '05

Dear naumarray and numpy community: Could you tell me where can I get real life examples to apply numarray. I am a Python and numarray begineer. Thanks Eduardo Stark --------------------------------- Correo Yahoo! Comprueba qué es nuevo, aquí http://correo.yahoo.es

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Real life examples
by Eduardo Stark 20 Nov '05

20 Nov '05

Dear naumarray and numpy community: Could you tell me where can I get real life examples to apply numarray. I am a Python and numarray begineer. Thanks Eduardo Stark --------------------------------- Correo Yahoo! Comprueba qué es nuevo, aquí http://correo.yahoo.es

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compilation error on OSX 10.4
by Curzio Basso 19 Nov '05

19 Nov '05

Hi all, I get the following error compiling an extension module using numarray 1.4.1 on Mac OSX 10.4: ----- building 'fmlio' extension gcc-3.3 -fno-strict-aliasing -Wno-long-double -no-cpp-precomp -mno-fused-madd -DNDEBUG -g -O3 -Wall -Wstrict-prototypes -DLINUX -I/home/basso/usr/include/python -I/sw/include/python2.4 -c src/fmlio.cpp -o build/temp.darwin-8.3.0-Power_Macintosh-2.4/src/fmlio.o In file included from /sw/include/python2.4/numarray/libnumarray.h:17, from /sw/include/python2.4/numarray/numarray.h:6, from src/fmlio.h:10, from src/fmlio.cpp:2: /sw/include/python2.4/numarray/nummacro.h:27: error: parse error before `;' token error: command 'gcc-3.3' failed with exit status 1 ----- the same happens with gcc-4. On Gentoo I can compile without problems. Did anyone else get a similar problem? Ah, and numarray.h is included right after Python.h. cheers curzio

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numarray CVS seems to have an __array_struct__ bug
by Andrew Straw 16 Nov '05

16 Nov '05

Hi, I think there's a bug in the new __array_struct__ code in numarray CVS. Consider an object a which implements the __array_struct__ interface. If one constructs a numarray "view" of this array using aview = numarray.asarray(a), the numarray.ndarray instance does not keep a reference to a.__array_struct__. Thus, a segfault may occur because a.data can be freed although aview may attempt to access it. In particular code like this will crash: buf = numarray.asarray( array_struct_factory() ) # buffer is freed buf[1] = 2 # attempt is made to write to the non-existant buffer, causing a segfault I've "fixed" this issue with the following, which I'm sure is not the right way, but it's all I can do at this point. diff -u -r1.130 numarraycore.py --- Lib/numarraycore.py 4 Nov 2005 20:27:11 -0000 1.130 +++ Lib/numarraycore.py 17 Nov 2005 11:38:29 -0000 @@ -357,6 +357,7 @@ a = None if hasattr(sequence, "__array_struct__"): a = _numarray._array_from_array_struct(sequence.__array_struct__) + a._hack_to_hold_reference_ = sequence.__array_struct__ elif (hasattr(sequence, "__array_shape__") and hasattr(sequence, "__array_typestr__")): typestr = sequence.__array_typestr__ And while I'm at it, can the "from distutils.command.config import log" be turned off in setup.py? I like to see those errors, warnings, and status strings whiz past...

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compiling 24.2 on solaris 8
by John Hunter 16 Nov '05

16 Nov '05

To compile numpy 24.2 on solaris 8, I needed to make the following change to Packages/RNG/Src/ranf.c #if !defined(__sgi) //int gettimeofday(struct timeval *, struct timezone *); //old int gettimeofday(); //new #endif Not sure why __sgi is defined... JDH

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Call for a Scientific/Engineering Tutorial or Two at PyCon 2006
by Jeff Rush 15 Nov '05

15 Nov '05

Greetings. I'm working with the Python Conference planning group, for a conference to be held in Dallas in 2006. As you probably know from postings to python-announce, this year, for the first time, we're having a full day (Feb 23, 2006) of trainer-compensated tutorials, structured as either half-day or full-day sessions. From the feedback we received at last year's PyCon, there was a strong interest in scientific/engineering uses of Python, which has a rich set of tools and frameworks. We hope this year to dedicate one room on Tutorial Day to such topics. While I was looking over the submissions for the tutorials tonight, I noticed there were none related to science/engineering. It would be cool to have a half-day class on one of the underlying packages used across disciplines. Note that these are to be professionally-run half or full day classes, suggested with handouts or notebooks. And the trainer will receive monetary compensation, depending upon the number of attendees that register for specific tutorials. If you or someone on your staff is interested, there is more information at: http://us.pycon.org/TX2006/CallForTutorials While the submission deadline expires tonight, we have some flexibility. Jeff Rush

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FIFO/circular buffer class in Numeric?
by RayS 14 Nov '05

14 Nov '05

Has anyone implemented a fast, generic circular array buffer in Numpy? I didn't see one in the usual searches, but I don't want to re-invent one either. I did see a number of C implementations like http://www.codeproject.com/csharp/circularbuffer.asp (http://www.gois.ws/files/attach/200209/200209201850040.zip) which could be weave'd, I suppose. I have some previous implementations I've used, but what I had in mind was making a new FIFO class with attributes of address, state<None,reading,writing>, pointer, size etc., and methods like flush (if I implement it as a memmap) and other things, like queue has. The important part of the idea is that multiple threads and processes could fully access it. Currently, I will have an ADC process fill it, and other processes use it. I'll post code as I go, in any case. Ray

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Numeric 24.2 build fails
by N. Volbers 12 Nov '05

12 Nov '05

Sorry to once again report a build error ;-) Numeric 24.1 builds just fine, while Numeric 24.2 produces the attaced messages (out.txt) and error messages (err.txt). HTH, Niklas. /usr/lib/gcc-lib/i486-slackware-linux/3.3.4/../../../../i486-slackware-linux/bin/ld: cannot find -llapack collect2: ld returned 1 exit status error: command 'gcc' failed with exit status 1 running build running build_py package init file 'Include/__init__.py' not found (or not a regular file) package init file 'Include/__init__.py' not found (or not a regular file) running build_ext building 'lapack_lite' extension gcc -pthread -shared build/temp.linux-i686-2.4/Src/lapack_litemodule.o -L/usr/lib/atlas -llapack -lcblas -lf77blas -latlas -lg2c -o build/lib.linux-i686-2.4/lapack_lite.so

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