def f(a, b): return crossentropy_softmax_1hot(T.shape_padleft(a) + b, y_idx)[0]
def f(a, b): return crossentropy_softmax_1hot(T.shape_padleft(a)+b, y_idx)[0]
def f(a): return crossentropy_softmax_1hot(a, y_idx)[0]