Mailman 3 November 2004 - NumPy-Discussion

KeyboardInterrupt shows strange behavior
by Norbert Nemec Nov. 18, 2004

Nov. 18, 2004

Hi there, I have the following dummy code, doing garbage until I interrupt it: ------------------------------------ from numarray import * A = zeros((100,100)) try: while 1: A = dot(A,A) except KeyboardInterrupt: print "Interrupted" -------------------------------------- Now, if I hit Ctrl-C to interrupt it, it behaves strangely. Most of the time, I see a message: -------------------- Exception exceptions.KeyboardInterrupt in <bound method NumArray.__del__ of array([[0, 0, 0, ..., 0, 0, 0], [0, 0, 0, ..., 0, 0, 0], [0, 0, 0, ..., 0, 0, 0], ..., [0, 0, 0, ..., 0, 0, 0], [0, 0, 0, ..., 0, 0, 0], [0, 0, 0, ..., 0, 0, 0]])> ignored ------------------------- after which the program continues to run, unimpressed by the fact that I would have liked to stop it. Only one out of ten attempts of pressing Ctrl-C is successful (probably depending on the exact position in the code where I hit the keys) - but even then, the program does not quit cleanly with an exception but it crashes hard with a SegFault! I am using a self-compiled glibc including the patch by Andrew Straw (see http://aspn.activestate.com/ASPN/Mail/Message/numpy-discussion/2207861) Might it be that this patch causes the problem? Ciao, Nobbi

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Re: Thank you!
by Numpy-discussion Nov. 17, 2004

Nov. 17, 2004

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failure notice
by MAILER-DAEMON＠mx.teleo.net Nov. 16, 2004

Nov. 16, 2004

Hi. This is the qmail-send program at mx.teleo.net. I'm afraid I wasn't able to deliver your message to the following addresses. This is a permanent error; I've given up. Sorry it didn't work out. <patrick.phalen(a)gmail.com>: 64.233.171.27 failed after I sent the message. Remote host said: 552 5.7.0 Illegal Attachment --- Below this line is a copy of the message.

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"Head Nummie" Semi-Abdicates...
by Todd Miller Nov. 16, 2004

Nov. 16, 2004

Due to the importance of on-going and future maintenance for Numeric and the fact that my own work is limited to numarray, I think we should split the role of "Head Nummie" into "Head Numeric Nummie" and "Head numarray Nummie". This really amounts to a clarification of who is doing what. My impression is that Travis Oliphant is the one doing most or all of the current Numeric work, so he is the logical Head Numeric Nummie. I am the most active with fundamental numarray so I am the logical Head numarray Nummie. Presuming that Travis wants the title "Head Numeric Nummie", All those in favor say +1 or nothing All those opposed say -1

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Re: Thanks :)
by Numpy-discussion Nov. 16, 2004

Nov. 16, 2004

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failure notice
by MAILER-DAEMON＠mx.teleo.net Nov. 15, 2004

Nov. 15, 2004

Hi. This is the qmail-send program at mx.teleo.net. I'm afraid I wasn't able to deliver your message to the following addresses. This is a permanent error; I've given up. Sorry it didn't work out. <patrick.phalen(a)gmail.com>: 64.233.171.27 failed after I sent the message. Remote host said: 552 5.7.0 Illegal Attachment --- Below this line is a copy of the message.

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Numeric 23.6 and vecLib (Apple's optimized implementation of BLAS)
by Chris Barker Nov. 15, 2004

Nov. 15, 2004

Hi all, I'm forwarding this on from Bob Ippolito (with his permission). I'd love to see this patch applied to the next Numeric release, as well as the setup.py fixed so as not to try to default to atlas. OS-X may be the only common platform where you can count on a native BLAS being there. Let's us it! -Chris From Bob: I've patched Numeric 23.6's setup.py to link against Apple's BLAS implementation. It shouldn't cause any problems for other platforms: http://undefined.org/python/mpkg/patch/Numeric-23.6/setup.py -- Christopher Barker, Ph.D. Oceanographer NOAA/OR&R/HAZMAT (206) 526-6959 voice 7600 Sand Point Way NE (206) 526-6329 fax Seattle, WA 98115 (206) 526-6317 main reception Chris.Barker(a)noaa.gov

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Sobel question
by Bob Klimek Nov. 15, 2004

Nov. 15, 2004

Hi, I recently started playing with numarray and especially nd_image for processing grayscale and RGB images. nd_image looks very interesting and I'm looking forward to checking. My question deals with the axis parameter of the Sobel filter. What does the function return when axis=-1? I figured out that when axis=0, the function returns the vertical gradient component and when axis=1 the horizontal gradient component. Since -1 is the default I expected that it would return the gradient magnitude (sqrt(x*x + y*y)) but that's not the case. Bob

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Re: Details
by numpy-discussion＠lists.sourceforge.net Nov. 12, 2004

Nov. 12, 2004

------------------ Virus Warning Message (on octopussy) Found virus WORM_NETSKY.D in file my_details.pif The uncleanable file is deleted. ---------------------------------------------------------

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Use __slots__ with numarray?
by Jens Jorgen Mortensen Nov. 12, 2004

Nov. 12, 2004

A few days ago, I found this page: http://mail.python.org/pipermail/python-list/2004-May/220513.html where speedups for creating objects using __slots__ is demonstrated. I have read somewhere that creation of numarrays is much slower than creation of Numeric arrays - so maybe using __slots__ should be considered? Just a suggestion from a happy numarray user! JJ

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