def grad(self, inputs, gout):
        (x,) = inputs
        (gz,) = gout
        assert _is_sparse_variable(x) or _is_sparse_variable(gz)
        return transpose(gz),
dataset/ETHPy150Open rizar/attention-lvcsr/libs/Theano/theano/sparse/basic.py/Transpose.grad/operator `and` -> `or`