[sage-support] Strange error
I am running the following Python example from the book Learning Python, from Mark Lutz and David Ascher, but Sage is returning a TypeError after presenting the correct response. Can anyone explain me why? I've found this very strange. sage: class Commuter: : def __init__(self, val): : self.val = val : def __add__(self, other): : print add, self.val, other : def __radd__(self, other): : print radd, self.val, other : sage: x = Commuter(88) sage: y = Commuter(99) sage: x + 1 add 88 1 sage: 1 + y radd 99 1 --- TypeError Traceback (most recent call last) ipython-input-76-e047f7a3a32a in module() 1 Integer(1) + y /usr/local/Sagemath/sage-6.3/local/lib/python2.7/site-packages/sage/structure/element.so in sage.structure.element.RingElement.__add__ (build/cythonized/sage/structure/element.c:14696)() /usr/local/Sagemath/sage-6.3/local/lib/python2.7/site-packages/sage/structure/coerce.so in sage.structure.coerce.CoercionModel_cache_maps.bin_op (build/cythonized/sage/structure/coerce.c:8323)() TypeError: unsupported operand parent(s) for '+': 'Integer Ring' and 'type 'instance'' -- You received this message because you are subscribed to the Google Groups sage-support group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
[sage-support] Strange error using R pexpect interface?
I'm using R matrices to use an R program and then do things with it in
Sage. For some reason Sage doesn't get the right answer for
matrices above a certain size.
The first one is right (it gives the space that is in the returned
string) while the second one makes no sense; ZZ='' is what actually
comes back. But there is no real reason for this - what's special
about the length? - and doing these in Sage's r_console() gives normal
results for the matrix.
So I feel like pexpect must be doing something naughty. Does anyone
have any ideas what might be going on so I can use more data?
Thanks,
- kcrisman
sage: ZZ = r.eval('matrix(c(1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2,
2, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1,
1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1,
1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 4, 4, 4, 4, 2, 2, 2, 2, 4, 4, 4, 4, 2, 2, 2, 2, 3, 3, 3,
3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 1, 1, 1, 1, 4, 4, 4, 4, 1, 1, 1, 1,
3, 3, 3, 3, 2, 2, 2, 2, 4, 4, 4, 4, 1, 1, 1, 1, 4, 4, 4, 4, 1, 1, 1,
1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 1, 1, 1, 1, 3, 3, 3, 3, 1,
1, 1, 1, 2, 2, 2, 2, 4, 4, 4, 4, 3, 3, 3, 3, 4, 4, 4, 4, 2, 2, 2, 2,
3, 3, 3, 3, 2, 2, 2, 2, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 4, 4, 4, 4,
1),ncol=4)'); ZZ[1]
' '
sage: ZZ = r.eval('matrix(c(1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2,
2, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1,
1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1,
1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 4, 4, 4, 4, 2, 2, 2, 2, 4, 4, 4, 4, 2, 2, 2, 2, 3, 3, 3,
3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 1, 1, 1, 1, 4, 4, 4, 4, 1, 1, 1, 1,
3, 3, 3, 3, 2, 2, 2, 2, 4, 4, 4, 4, 1, 1, 1, 1, 4, 4, 4, 4, 1, 1, 1,
1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 1, 1, 1, 1, 3, 3, 3, 3, 1,
1, 1, 1, 2, 2, 2, 2, 4, 4, 4, 4, 3, 3, 3, 3, 4, 4, 4, 4, 2, 2, 2, 2,
3, 3, 3, 3, 2, 2, 2, 2, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 4, 4, 4, 4, 1,
1, 1, 1, 3),ncol=4)'); ZZ[1]
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[sage-support] strange error message when using maxima
When I use sage from the command line I get the following error message: sage: integral(x,x) 'import site' failed; use -v for traceback Traceback (most recent call last): File /home/oscar/sage-4.5.2/local/bin/sage-cleaner, line 21, in module import os, shutil, sys, time, socket File /home/oscar/sage-4.5.2/local/lib/python/os.py, line 49, in module import posixpath as path File /home/oscar/sage-4.5.2/local/lib/python/posixpath.py, line 14, in module import stat File stat.py, line 2, in module from sage.all_cmdline import * # import sage library ImportError: No module named sage.all_cmdline 1/2*x^2 But as you can see, sage returns the correct answer. If I start sage from ~/sage-4.5.2 I don't get the error message: sage: integral(x,x) 1/2*x^2 I think that this might be related to the way in which I added ~/sage-4.5.2 to my PATH: I put the following line at the end of my ~/.bashrc file (Ubuntu 10.04): export PATH=$PATH:/home/oscar/sage-4.5.2 I also think this is Maxima-related, since it appears to happen only when calling Maxima (It does not happen anymore once Maxima has been started). I've had this error since sage 3.x but I thought I was making some no0bish mistake (which might still be the case). thanks! Oscar -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Strange Error in Converting polynomials to vector
I just tried this and when the field is bigger or equal to 2^16 I got following error: 2^15: Fine! K.a = GF(2^15, 'a') V = K.vector_space() z = (a+1)^13 V(z) (1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0) 2^16: Error! K.a = GF(2^16, 'a') V = K.vector_space() z = (a+1)^13 V(z) Exception (click to the left for traceback): ... TypeError: can't initialize vector from nonzero non-list I just wanted to know what is the difference between case 2^15 and 2^16. Thanx in advance! Bests, Ahmad --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://sage.math.washington.edu/sage/ and http://sage.scipy.org/sage/ -~--~~~~--~~--~--~---
