[Numpy-discussion] question about ufuncs

Darren Dale dsdale24@gmail....
Sun Feb 1 17:32:41 CST 2009

I've been playing with __array_wrap__ to make quantities with units play
well with numpy's ufuncs. For example, __array_wrap__ makes it is possible
to do the following:

>>> numpy.sqrt([1.,4.,9.]*m**2)

Is there an analog to __array_wrap__ for preprocessing arrays on their way
*into* a ufunc? For example, it would be nice if one could do something


where we have the opportunity to inspect the context, convert the Quantity
to units of radians, and then actually call the ufunc. Is this possible, or
does one have to reimplement such functions?

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