basic.py 文件源码

def backward(self, x, mask, hc):
        n_in, n_out, activation = self.n_in, self.n_out_t, self.activation

        if hc.ndim > 1:
            c_tm1 = hc[:, :n_out]
            h_tm1 = hc[:, n_out:]
        else:
            c_tm1 = hc[:n_out]
            h_tm1 = hc[n_out:]

        in_t = self.in_gate_b.forward(x,h_tm1)
        forget_t = self.forget_gate_b.forward(x,h_tm1)
        out_t = self.out_gate_b.forward(x, h_tm1)

        c_t = forget_t * c_tm1 + in_t * self.input_layer_b.forward(x,h_tm1)
        c_t = c_t * mask.dimshuffle(0, 'x')
    c_t = T.cast(c_t, 'float32')
        h_t = out_t * T.tanh(c_t)
        h_t = h_t * mask.dimshuffle(0, 'x')
    h_t = T.cast(h_t, 'float32')

        if hc.ndim > 1:
            return T.concatenate([ c_t, h_t ], axis=1)
        else:
            return T.concatenate([ c_t, h_t ])