Wayne Folta wrote:

> I see Ellipsis documented under slicing, though it appears it's not

> used in slicing but rather slicing-like notation for dictionary keys.

> It's a minor thing but none of the books I have even mention it. Is it

> obsolete in python 2.x or still useful?
The Nutshell has it in the chapter about the Numeric package (but not in the

index), and Numeric is the only package I know of that uses the ellipsis:

>>> a = Numeric.reshape(range(, (2,2,2))

>>> a
array([[[0, 1],

[2, 3]],

[[4, 5],

[6, 7]]])

>>> a[1,1,1]
7

>>> a[:,:,1]
array([[1, 3],

[5, 7]])

This can be abbreviated:

>>> a[...,1]
array([[1, 3],

[5, 7]])

Another example:

>>> a[1,...,1]
array([5, 7])

>>> a[1,:,1]
array([5, 7])

I. e. you can specify the leading and the trailing dimension(s), and the

ellipsis inserts defaults for the intermediate dimensions.

Peter