[SciPy-dev] [SciPy-user] 'object_arrtype' problem
oliphant at ee.byu.edu
Thu Dec 8 13:01:41 CST 2005
Ryan Krauss wrote:
>What do you mean by "hand off behavior of the object to the underlying
>object in all cases"?
All arrays return array scalars. This allows us to control the math and
the methods of the returned objects. This is very useful for the
regular arrays. Object arrays simply inherited that behavior and
therefore there is an "object"-array type. (Run type() on one of your
returned objects...) In this case, though, the array object contains a
pointer to another object (that's the thing that has the methods and
attributes you wanted).
There is the obvious question as to whether or not having a separate
object array-scalar type is even useful, though. It does provide
consistency of behavior but I think the expense is too high in this case.
Right now, I'm leaning to having OBJECT arrays return the actual object
like Numeric did. This will mean, of course that they won't have the
array methods and there will be an "except-for object arrays" cluttered
throughout documentation, but I think it's a better compromise solution .
The change is not difficult and could be done in about 30 minutes.
I'd like to hear from people as to what their attitude is:
1) Have object arrays return the actual Python object like Numeric did
but different from all other array types which return an "array-scalar"
2) Keep the current behavior but soup up the object array type so it
"works better". I don't think we could ever make a generic object that
can always respond as any other object, though, so there will be minor
Let me know.
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