def test_model_dynamic_lr():
grad = tf.Variable([[0.1]])
model = tf.keras.Sequential([
tf.keras.layers.Dense(
1,
kernel_initializer=tf.keras.initializers.Constant([[1.0]]),
use_bias=False,
)
])
model.build(input_shape=[1, 1])
opt = Lookahead("adam", sync_period=10, slow_step_size=0.4)
_ = opt.apply_gradients(list(zip([grad], model.variables)))
np.testing.assert_allclose(opt.lr.read_value(), 1e-3)
opt.lr = 1e-4
np.testing.assert_allclose(opt.lr.read_value(), 1e-4)
def test_model_dynamic_lr(self):
grad = tf.Variable([[0.1]])
model = tf.keras.Sequential([
tf.keras.layers.Dense(
1,
kernel_initializer=tf.keras.initializers.Constant([[1.0]]),
use_bias=False)
])
model.build(input_shape=[1, 1])
opt = Lookahead('adam', sync_period=10, slow_step_size=0.4)
update = opt.apply_gradients(list(zip([grad], model.variables)))
self.evaluate(tf.compat.v1.global_variables_initializer())
self.evaluate(update)
self.assertAllClose(opt.lr.read_value(), 1e-3)
opt.lr = 1e-4
self.assertAllClose(opt.lr.read_value(), 1e-4)