[PYTHON MATRIX-SIG] Yorick, Python and Array.py
Sat, 11 Nov 95 12:17:10 -0500
I almost completely agree with your comments (now that I think I better
understand what you're talking about). Here is how I see things. Please
shout out if there are any major errors.
I'm creating special objects All, Empty, Star, and Dot in order to capture
the capabilities of Yorick for array subscripting.
I've created a slice object to generalize the notion of start:stop:step indexing.
Right now, my indexing system can take any combination of arbitrary
sequences of ints, slices, or single ints as a full product form index into
The principle problems with this system are potential naming conflicts (or
really ugly names like Matrix.Star) and the ugliness of Slice(None,None,2)
You are working on an extension to the python grammar to remove the extra
brackets, make ::2 <--> some builtin python slice object, and "-" equivalent
to some builtin python pseudo index object. I'd love to see all of these
things happen, and I think that they'd fit in perfectly with my existing
I'm curious as to how you're implementing your slices. Are you creating a
new python C object? This is actually the next step for me with my matrix
object, and I'd love to see what you've done so far so that I can try and
keep my work compatible with yours (and not duplicate too much effort).
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