Zachary Pincus wrote:

>  Thanks Travis for the replies and the new functionality in the SVN!
> 
>  I think I have enough (well, maybe once I figure out  
>  __array_priority__) to get a decent wiki entry for subclassing  
>  ndarray, and maybe some template subclasses that others can use.
> 
>  I presume __array_priority__ determines the resulting type when two  
>  different type arrays are ufunc'd together? The exact mechanism of  
>  which object gets selected as the parent, etc., is still unclear though.

When two different subclasses appear in a ufunc (or in other places in 
ndarray), the subclass chosen for creation is the one with highest 
__array_priority__.

The "parent" concept is entirely separate is the object passed to 
__array_finalize__ and should be of the same type as self (or None).

-Travis




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