gem.py 文件源码

def __new__(cls, array):
        array = asarray(array)
        assert numpy.prod(array.shape)

        # Handle children with shape
        child_shape = array.flat[0].shape
        assert all(elem.shape == child_shape for elem in array.flat)

        if child_shape:
            # Destroy structure
            direct_array = numpy.empty(array.shape + child_shape, dtype=object)
            for alpha in numpy.ndindex(array.shape):
                for beta in numpy.ndindex(child_shape):
                    direct_array[alpha + beta] = Indexed(array[alpha], beta)
            array = direct_array

        # Constant folding
        if all(isinstance(elem, Constant) for elem in array.flat):
            return Literal(numpy.vectorize(attrgetter('value'))(array))

        self = super(ListTensor, cls).__new__(cls)
        self.array = array
        return self