[Numpy-discussion] Some comments on the Numeric3 Draft of 1-Mar-05
oliphant at ee.byu.edu
Thu Mar 3 11:41:24 EST 2005
Colin J. Williams wrote:
> My understanding was that there was to be a new builtin
> multiarray/Array class/type which eventually would replace the
> existing array.ArrayType. Thus, for a time at least, there would be
> at least one new class/type.
The new type will actually be in the standard library. For backwards
compatibility we will not be replacing the existing array.ArrayType but
providing an additional ndarray.ndarray (or some such name -- the name
hasn't been finalized yet).
> In addition, it seemed to be proposed that the new class/type would
> not just be Array but Array_with_Int32, Array_with_Float64 etc.. I'm
> not too clear on this latter point but Konrad says that there would
> not be this multiplicity of basic class/type's.
The arrays have always been homogeneous collections of "something".
This 'something' has been indicated by typecodes characters (Numeric) or
Python classes (numarray). The proposal is that the "something" that
identifies what the homogeneous arrays are collections of will be actual
type objects. Some of these type objects are just "organizational
types" which help to classify the different kinds of homogeneous
arrays. The "leaf-node" types are also the types of new Python scalars
that act as a transition layer between ndarrays with their variety of
objects and traditional Python bool, int, float, complex, string, and
unicode objects which do not "understand" that they could be considered
as 0-dimensional arrays.
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