A Tuesday 29 July 2008, David Huard escrigué:
Hi,
Silent casting is often a source of bugs and I appreciate the strict rules you want to enforce. However, I think there should be a simpler mechanism for operations between different types than creating a copy of a variable with the correct type.
My suggestion is to have a dtype argument for methods such as add and subs:
numpy.ones(3, dtype="t8[Y]").add(numpy.zeros(3, dtype="t8[fs]"),
dtype="t8[fs]")
This way, `implicit` operations (+,-) enforce strict rules, and `explicit` operations (add, subs) let's you do want you want at your own risk.
Hmm, the idea of the ``.add()`` and ``.subtract()`` methods is tempting, but I not sure it is a good idea to add new methods to the ndarray object that are meant to be used with just the date/time dtype. I'm afraid that I'm -1 here. Cheers, -- Francesc Alted