[Numpy-discussion] ufunc for user-defined type

[Travis E. Oliphant]

Neal Becker wrote:
> Now that I have my user-defined type, I want to add some funcs.
> According to the numpy book, I need to use:
>
> PyUFunc_RegisterLoopForType
>
> The book says I first need a ufunc.  The only way I see to create one is
>
> PyUFunc_FromFuncAndData.
>
> Is the the correct procedure?
>   
You'll have to do some digging because the API allowing low-level loops 
for user-defined types is not well tested or vetted.   Also, don't be 
surprised if you uncover some bugs.

The concept is that you create the UFunc with the "built-in" types using 
PyUFunc_FromFuncAndData and then you add loops for the user-defined type 
using RegisterLoopForType.

So, you have the basic procedure down.

-Travis