updates.py 文件源码

def setUp(self):
    self.initial = -2.0
    self.approx_solution = 0.0
    x = theano.shared(np.array(self.initial, dtype='float32'))

    self.params = [x]

    self.inputs = []

    loss = -T.nnet.sigmoid(10.0 * x) * T.nnet.sigmoid(-10.0 * x)

    self.loss = loss

    x_sub = T.fscalar('x sub')
    self.get_loss = theano.function([x_sub] + self.inputs, self.loss, givens=[(self.params[0], x_sub)])