Python tf_util.flatgrad方法代码示例

# 需要导入模块: from baselines.common import tf_util [as 别名]
# 或者: from baselines.common.tf_util import flatgrad [as 别名]
def setup_critic_optimizer(self):
        logger.info('setting up critic optimizer')
        normalized_critic_target_tf = tf.clip_by_value(normalize(self.critic_target, self.ret_rms), self.return_range[0], self.return_range[1])
        self.critic_loss = tf.reduce_mean(tf.square(self.normalized_critic_tf - normalized_critic_target_tf))
        if self.critic_l2_reg > 0.:
            critic_reg_vars = [var for var in self.critic.trainable_vars if 'kernel' in var.name and 'output' not in var.name]
            for var in critic_reg_vars:
                logger.info('  regularizing: {}'.format(var.name))
            logger.info('  applying l2 regularization with {}'.format(self.critic_l2_reg))
            critic_reg = tc.layers.apply_regularization(
                tc.layers.l2_regularizer(self.critic_l2_reg),
                weights_list=critic_reg_vars
            )
            self.critic_loss += critic_reg
        critic_shapes = [var.get_shape().as_list() for var in self.critic.trainable_vars]
        critic_nb_params = sum([reduce(lambda x, y: x * y, shape) for shape in critic_shapes])
        logger.info('  critic shapes: {}'.format(critic_shapes))
        logger.info('  critic params: {}'.format(critic_nb_params))
        self.critic_grads = U.flatgrad(self.critic_loss, self.critic.trainable_vars, clip_norm=self.clip_norm)
        self.critic_optimizer = MpiAdam(var_list=self.critic.trainable_vars,
            beta1=0.9, beta2=0.999, epsilon=1e-08) 

# 需要导入模块: from baselines.common import tf_util [as 别名]
# 或者: from baselines.common.tf_util import flatgrad [as 别名]
def setup_critic_optimizer(self):
        logger.info('setting up critic optimizer')
        normalized_critic_target_tf = tf.clip_by_value(normalize(self.critic_target, self.ret_rms), self.return_range[0], self.return_range[1])
        self.critic_loss = tf.reduce_mean(tf.square(self.normalized_critic_tf - normalized_critic_target_tf))
        if self.critic_l2_reg > 0.:
            critic_reg_vars = [var for var in self.critic.trainable_vars if var.name.endswith('/w:0') and 'output' not in var.name]
            for var in critic_reg_vars:
                logger.info('  regularizing: {}'.format(var.name))
            logger.info('  applying l2 regularization with {}'.format(self.critic_l2_reg))
            critic_reg = tc.layers.apply_regularization(
                tc.layers.l2_regularizer(self.critic_l2_reg),
                weights_list=critic_reg_vars
            )
            self.critic_loss += critic_reg
        critic_shapes = [var.get_shape().as_list() for var in self.critic.trainable_vars]
        critic_nb_params = sum([reduce(lambda x, y: x * y, shape) for shape in critic_shapes])
        logger.info('  critic shapes: {}'.format(critic_shapes))
        logger.info('  critic params: {}'.format(critic_nb_params))
        self.critic_grads = U.flatgrad(self.critic_loss, self.critic.trainable_vars, clip_norm=self.clip_norm)
        self.critic_optimizer = MpiAdam(var_list=self.critic.trainable_vars,
            beta1=0.9, beta2=0.999, epsilon=1e-08) 

# 需要导入模块: from baselines.common import tf_util [as 别名]
# 或者: from baselines.common.tf_util import flatgrad [as 别名]
def __init__(self, env, hidden_size, entcoeff=0.001, lr_rate=1e-3, scope="adversary"):
        self.scope = scope
        self.observation_shape = env.observation_space.shape
        self.actions_shape = env.action_space.shape
        self.input_shape = tuple([o+a for o, a in zip(self.observation_shape, self.actions_shape)])
        self.num_actions = env.action_space.shape[0]
        self.hidden_size = hidden_size
        self.build_ph()
        # Build grpah
        generator_logits = self.build_graph(self.generator_obs_ph, self.generator_acs_ph, reuse=False)
        expert_logits = self.build_graph(self.expert_obs_ph, self.expert_acs_ph, reuse=True)
        # Build accuracy
        generator_acc = tf.reduce_mean(tf.to_float(tf.nn.sigmoid(generator_logits) < 0.5))
        expert_acc = tf.reduce_mean(tf.to_float(tf.nn.sigmoid(expert_logits) > 0.5))
        # Build regression loss
        # let x = logits, z = targets.
        # z * -log(sigmoid(x)) + (1 - z) * -log(1 - sigmoid(x))
        generator_loss = tf.nn.sigmoid_cross_entropy_with_logits(logits=generator_logits, labels=tf.zeros_like(generator_logits))
        generator_loss = tf.reduce_mean(generator_loss)
        expert_loss = tf.nn.sigmoid_cross_entropy_with_logits(logits=expert_logits, labels=tf.ones_like(expert_logits))
        expert_loss = tf.reduce_mean(expert_loss)
        # Build entropy loss
        logits = tf.concat([generator_logits, expert_logits], 0)
        entropy = tf.reduce_mean(logit_bernoulli_entropy(logits))
        entropy_loss = -entcoeff*entropy
        # Loss + Accuracy terms
        self.losses = [generator_loss, expert_loss, entropy, entropy_loss, generator_acc, expert_acc]
        self.loss_name = ["generator_loss", "expert_loss", "entropy", "entropy_loss", "generator_acc", "expert_acc"]
        self.total_loss = generator_loss + expert_loss + entropy_loss
        # Build Reward for policy
        self.reward_op = -tf.log(1-tf.nn.sigmoid(generator_logits)+1e-8)
        var_list = self.get_trainable_variables()
        self.lossandgrad = U.function([self.generator_obs_ph, self.generator_acs_ph, self.expert_obs_ph, self.expert_acs_ph],
                                      self.losses + [U.flatgrad(self.total_loss, var_list)]) 

# 需要导入模块: from baselines.common import tf_util [as 别名]
# 或者: from baselines.common.tf_util import flatgrad [as 别名]
def learn(env, policy_func, dataset, optim_batch_size=128, max_iters=1e4,
          adam_epsilon=1e-5, optim_stepsize=3e-4,
          ckpt_dir=None, log_dir=None, task_name=None,
          verbose=False):

    val_per_iter = int(max_iters/10)
    ob_space = env.observation_space
    ac_space = env.action_space
    pi = policy_func("pi", ob_space, ac_space)  # Construct network for new policy
    # placeholder
    ob = U.get_placeholder_cached(name="ob")
    ac = pi.pdtype.sample_placeholder([None])
    stochastic = U.get_placeholder_cached(name="stochastic")
    loss = tf.reduce_mean(tf.square(ac-pi.ac))
    var_list = pi.get_trainable_variables()
    adam = MpiAdam(var_list, epsilon=adam_epsilon)
    lossandgrad = U.function([ob, ac, stochastic], [loss]+[U.flatgrad(loss, var_list)])

    U.initialize()
    adam.sync()
    logger.log("Pretraining with Behavior Cloning...")
    for iter_so_far in tqdm(range(int(max_iters))):
        ob_expert, ac_expert = dataset.get_next_batch(optim_batch_size, 'train')
        train_loss, g = lossandgrad(ob_expert, ac_expert, True)
        adam.update(g, optim_stepsize)
        if verbose and iter_so_far % val_per_iter == 0:
            ob_expert, ac_expert = dataset.get_next_batch(-1, 'val')
            val_loss, _ = lossandgrad(ob_expert, ac_expert, True)
            logger.log("Training loss: {}, Validation loss: {}".format(train_loss, val_loss))

    if ckpt_dir is None:
        savedir_fname = tempfile.TemporaryDirectory().name
    else:
        savedir_fname = osp.join(ckpt_dir, task_name)
    U.save_state(savedir_fname, var_list=pi.get_variables())
    return savedir_fname 

# 需要导入模块: from baselines.common import tf_util [as 别名]
# 或者: from baselines.common.tf_util import flatgrad [as 别名]
def test_MpiAdam():
    np.random.seed(0)
    tf.set_random_seed(0)

    a = tf.Variable(np.random.randn(3).astype('float32'))
    b = tf.Variable(np.random.randn(2,5).astype('float32'))
    loss = tf.reduce_sum(tf.square(a)) + tf.reduce_sum(tf.sin(b))

    stepsize = 1e-2
    update_op = tf.train.AdamOptimizer(stepsize).minimize(loss)
    do_update = U.function([], loss, updates=[update_op])

    tf.get_default_session().run(tf.global_variables_initializer())
    for i in range(10):
        print(i,do_update())

    tf.set_random_seed(0)
    tf.get_default_session().run(tf.global_variables_initializer())

    var_list = [a,b]
    lossandgrad = U.function([], [loss, U.flatgrad(loss, var_list)], updates=[update_op])
    adam = MpiAdam(var_list)

    for i in range(10):
        l,g = lossandgrad()
        adam.update(g, stepsize)
        print(i,l) 

# 需要导入模块: from baselines.common import tf_util [as 别名]
# 或者: from baselines.common.tf_util import flatgrad [as 别名]
def setup_actor_optimizer(self):
        logger.info('setting up actor optimizer')
        self.actor_loss = -tf.reduce_mean(self.critic_with_actor_tf)
        actor_shapes = [var.get_shape().as_list() for var in self.actor.trainable_vars]
        actor_nb_params = sum([reduce(lambda x, y: x * y, shape) for shape in actor_shapes])
        logger.info('  actor shapes: {}'.format(actor_shapes))
        logger.info('  actor params: {}'.format(actor_nb_params))
        self.actor_grads = U.flatgrad(self.actor_loss, self.actor.trainable_vars, clip_norm=self.clip_norm)
        self.actor_optimizer = MpiAdam(var_list=self.actor.trainable_vars,
            beta1=0.9, beta2=0.999, epsilon=1e-08) 

# 需要导入模块: from baselines.common import tf_util [as 别名]
# 或者: from baselines.common.tf_util import flatgrad [as 别名]
def test_MpiAdam():
    np.random.seed(0)
    tf.set_random_seed(0)
    
    a = tf.Variable(np.random.randn(3).astype('float32'))
    b = tf.Variable(np.random.randn(2,5).astype('float32'))
    loss = tf.reduce_sum(tf.square(a)) + tf.reduce_sum(tf.sin(b))

    stepsize = 1e-2
    update_op = tf.train.AdamOptimizer(stepsize).minimize(loss)
    do_update = U.function([], loss, updates=[update_op])

    tf.get_default_session().run(tf.global_variables_initializer())
    for i in range(10):
        print(i,do_update())

    tf.set_random_seed(0)
    tf.get_default_session().run(tf.global_variables_initializer())

    var_list = [a,b]
    lossandgrad = U.function([], [loss, U.flatgrad(loss, var_list)], updates=[update_op])
    adam = MpiAdam(var_list)

    for i in range(10):
        l,g = lossandgrad()
        adam.update(g, stepsize)
        print(i,l)