how to get a wrap aound slice of numpy array

Hi, I am learning Numpy and using it for a course project. Suppose x = [0, 1, 2, 3, 4], I know that x[0:2] would give [0,1], and x[-1] give [4], is there a way that I can get [4,0,1]. I try x[-1:2], but it returns an empty array. I am doing convolution (e.g. convolve [0, 1, 2, 3, 4] with [1,-2,1])

Re: how to get a wrap aound slice of numpy array

Thanks. I didn't know numpy can do vector indexing as in Matlab. -- http://mail.python.org/mailman/listinfo/python-list

No speedup on multi-processor machine?

Hi, I am using Python Thread library for my parallel processing course project. I am doing matrix convolution on a multi-processor machine running Solaris. I just found out that no speed-up is obtained with threading. It is probably because of something called GIL in Python. How can I get around th

Re: No speedup on multi-processor machine?

Thanks guys. But I think IronPython only works on Windows machine, but I am using a Sun machine. I was suggested to use Jython, which can run on Sun. But I need to use Numpy for matrix operations, which is only available to CPython. -- http://mail.python.org/mailman/listinfo/python-list