Mailman 3 August 2008 - NumPy-Discussion

What/when is the next release ?
by Pierre GM Aug. 4, 2008

Aug. 4, 2008

All, * What will be the next release: 1.1.x (w/ support of Python 2.3) or 1.2.0 (w/o support to Python 2.3) ? I need to correct an elusive bug in numpy.ma.MaskedArray and wondered whether I needed to backport it or not (1.1.x would likely be affected as well). Thanks a lot in advance, P.

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concatenate an array with a number
by Nicolas Chopin Aug. 4, 2008

Aug. 4, 2008

Hi list, I want to do this: y = concatenate(x[0],x) where x is a 1d array. However, the only way I managed to make this work is: y = concatenate( array((x[0],),ndmin=1), x) which is kind of cryptic. (If I remove ndmin, numpy still complains.) 1. Is there a better way? 2. Would it be possible to allow numbers as arguments for concatenate? Many thanks NC

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Renaming MaskedArray._basedict
by Pierre GM Aug. 4, 2008

Aug. 4, 2008

All, I intend to rename a little-known attribute of MaskedArray, _basedict, to something more understandable such as _optinfo. This attribute is a dictionary that comes handy when subclassing MaskedArray or to save information. _basedict would still be available for a while as an alias to _optinfo, but may disappear in the long run. I intend to put a DeprecationWarning at the beginning of numpy.ma.core. A side-effect is that this warning is issued each time numpy.ma is imported, which clutters the output of the tests. Am I missing something ? P.

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ANN: NumPy 1.1.1
by Jarrod Millman Aug. 2, 2008

Aug. 2, 2008

I'm pleased to announce the release of NumPy 1.1.1. NumPy is the fundamental package needed for scientific computing with Python. It contains: * a powerful N-dimensional array object * sophisticated (broadcasting) functions * basic linear algebra functions * basic Fourier transforms * sophisticated random number capabilities * tools for integrating Fortran code. Besides it's obvious scientific uses, NumPy can also be used as an efficient multi-dimensional container of generic data. Arbitrary data-types can be defined. This allows NumPy to seamlessly and speedily integrate with a wide-variety of databases. Numpy 1.1.1 is a bug fix release featuring major improvements in Python 2.3.x compatibility and masked arrays. For information, please see the release notes: http://sourceforge.net/project/shownotes.php?group_id=1369&release_id=617279 Thank you to everybody who contributed to this release. Enjoy, -- Jarrod Millman Computational Infrastructure for Research Labs 10 Giannini Hall, UC Berkeley phone: 510.643.4014 http://cirl.berkeley.edu/

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User-defined data-types
by Francesc Alted Aug. 1, 2008

Aug. 1, 2008

Hi, We need to make a dtype that needs to be defined in the user's application space. In the NumPy book there is a section devoted to this subject, but also warns: """ Adding data-types is one of the less well-tested areas for NumPy 1.0, so there may be bugs remaining in the approach. """ Anybody out there has tried this successfully? Thanks, -- Francesc Alted

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[ANNOUNCE] ETS 3.0.0b1 released!
by Dave Peterson Aug. 1, 2008

Aug. 1, 2008

Hello, I am very pleased to announce that ETS 3.0.0b1 has just been tagged and released! All ETS sub-projects, including Traits, Chaco, Mayavi, and Envisage, have been tagged and released in one form or another (alpha, beta, final) as part of this effort. All ETS projects have now been registered with PyPi and source tarballs have been uploaded! As a result, for the first time ever, you can now easy_install all of ETS via a simple command like: easy_install ETS Or, alternatively, you can get only specific projects with commands like: easy_install Mayavi Or easy_install Chaco We anticipate the final release of ETS 3.0, and all of its sub-projects at their current version number, in a matter of weeks. Please join us in helping make this final release the most robust release it can be by participating in this beta shakeout period. Discussions about the status of ETS and its sub-projects happens on the enthought-dev mailing list, who's home page is at: https://mail.enthought.com/mailman/listinfo/enthought-dev Thank you to all who have worked so hard on making this release possible! -- Dave Enthought Tool Suite --------------------------- The Enthought Tool Suite (ETS) is a collection of components developed by Enthought and open source participants, which we use every day to construct custom scientific applications. It includes a wide variety of components, including: * an extensible application framework * application building blocks * 2-D and 3-D graphics libraries * scientific and math libraries * developer tools The cornerstone on which these tools rest is the Traits package, which provides explicit type declarations in Python; its features include initialization, validation, delegation, notification, and visualization of typed attributes. More information is available for all the packages within ETS from the Enthought Tool Suite development home page at http://code.enthought.com/projects/tool-suite.php. Testimonials ---------------- "I set out to rebuild an application in one week that had been developed over the last seven years (in C by generations of post-docs). Pyface and Traits were my cornerstones and I knew nothing about Pyface or Wx. It has been a hectic week. But here ... sits in front of me a nice application that does most of what it should. I think this has been a huge success. ... Thanks to the tools Enthought built, and thanks to the friendly support from people on the [enthought-dev] list, I have been able to build what I think is the best application so far. I have built similar applications (controlling cameras for imaging Bose-Einstein condensate) in C+MFC, Matlab, and C+labWindows, each time it has taken me at least four times longer to get to a result I regard as inferior. So I just wanted to say a big "thank you". Thank you to Enthought for providing this great software open-source. Thank you for everybody on the list for your replies." — Gaël Varoquaux, Laboratoire Charles Fabry, Institut d’Optique, Palaiseau, France "I'm currently writing a realtime data acquisition/display application … I'm using Enthought Tool Suite and Traits, and Chaco for display. IMHO, I think that in five years ETS/Traits will be the most comonly used framework for scientific applications." — Gary Pajer, Department of Chemistry, Biochemistry and Physics, Rider University, Lawrenceville NJ

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