Re: [Numpy-discussion] Extending ufunc signature syntax for matmul, frozen dimensions

On Wed, May 2, 2018 at 6:24 AM, Hameer Abbasi <einstein.edison@gmail.com> wrote:

There is always the option of any downstream object overriding matmul, and I fail to see which objects won't have a shape. - Hameer

I think we should not decide too readily on what is "reasonable" to expect for a ufunc input. For instance, I'm currently writing a chained-ufunc class which uses __array_ufunc__ to help make a chain (something like `chained_ufunc = np.sin(np.multiply(Input(), Input()))`). Here, my `Input` class defines `__array_ufunc__` but definitely does not have a shape, and I would like to be able to override `np.matmul` just like every other ufunc. -- Marten