On 1/26/2011 12:52 PM, Benjamin Kaplan wrote:
If you're trying to learn a language, I would suggest reading
tutorials, not the grammar.
I second that.
As you can see from the error thrown, the
operation is syntactically valid (you don't get a syntax error). It's
just that lists don't accept them. I don't know of any built-in data
type that takes slice lists but numpy matrices will.
a = numpy.matrix([[1,2,3],[4,5,6],[7,8,9]])
matrix([[1, 2, 3],
[4, 5, 6],
[7, 8, 9]])
a[0:2,1:3]
matrix([[2, 3],
[5, 6]])
Which is to say, slice lists are a specialized feature added
specifically for numerical python, now numpy. Ignore then unless and
until you happen to install and use numpy, or something similar that
also uses them.
--
Terry Jan Reedy
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