93 lines
3.2 KiB
Python
93 lines
3.2 KiB
Python
#!/usr/bin/env python
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# coding=utf-8
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'''
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@Author: John
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@Email: johnjim0816@gmail.com
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@Date: 2020-06-12 00:48:57
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@LastEditor: John
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LastEditTime: 2021-03-30 16:59:19
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@Discription:
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@Environment: python 3.7.7
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'''
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import sys,os
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from pathlib import Path
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import sys,os
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curr_path = os.path.dirname(__file__)
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parent_path=os.path.dirname(curr_path)
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sys.path.append(parent_path) # add current terminal path to sys.path
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import gym
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import torch
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import datetime
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from DQN.agent import DQN
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from common.plot import plot_rewards
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from common.utils import save_results
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SEQUENCE = datetime.datetime.now().strftime("%Y%m%d-%H%M%S") # obtain current time
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SAVED_MODEL_PATH = curr_path+"/saved_model/"+SEQUENCE+'/' # path to save model
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if not os.path.exists(curr_path+"/saved_model/"):
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os.mkdir(curr_path+"/saved_model/")
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if not os.path.exists(SAVED_MODEL_PATH):
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os.mkdir(SAVED_MODEL_PATH)
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RESULT_PATH = curr_path+"/results/"+SEQUENCE+'/' # path to save rewards
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if not os.path.exists(curr_path+"/results/"):
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os.mkdir(curr_path+"/results/")
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if not os.path.exists(RESULT_PATH):
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os.mkdir(RESULT_PATH)
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class DQNConfig:
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def __init__(self):
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self.algo = "DQN" # name of algo
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self.gamma = 0.95
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self.epsilon_start = 1 # e-greedy策略的初始epsilon
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self.epsilon_end = 0.01
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self.epsilon_decay = 500
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self.lr = 0.0001 # learning rate
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self.memory_capacity = 10000 # Replay Memory容量
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self.batch_size = 32
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self.train_eps = 300 # 训练的episode数目
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self.target_update = 2 # target net的更新频率
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self.eval_eps = 20 # 测试的episode数目
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self.device = torch.device("cuda" if torch.cuda.is_available() else "cpu") # 检测gpu
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self.hidden_dim = 256 # 神经网络隐藏层维度
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def train(cfg,env,agent):
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print('Start to train !')
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rewards = []
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ma_rewards = [] # moveing average reward
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for i_episode in range(cfg.train_eps):
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state = env.reset()
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done = False
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ep_reward = 0
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while not done:
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action = agent.choose_action(state)
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next_state, reward, done, _ = env.step(action)
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ep_reward += reward
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agent.memory.push(state, action, reward, next_state, done)
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state = next_state
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agent.update()
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if i_episode % cfg.target_update == 0:
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agent.target_net.load_state_dict(agent.policy_net.state_dict())
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print('Episode:{}/{}, Reward:{}'.format(i_episode+1,cfg.train_eps,ep_reward))
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rewards.append(ep_reward)
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# 计算滑动窗口的reward
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if ma_rewards:
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ma_rewards.append(
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0.9*ma_rewards[-1]+0.1*ep_reward)
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else:
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ma_rewards.append(ep_reward)
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print('Complete training！')
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return rewards,ma_rewards
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if __name__ == "__main__":
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cfg = DQNConfig()
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env = gym.make('CartPole-v0')
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env.seed(1)
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state_dim = env.observation_space.shape[0]
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action_dim = env.action_space.n
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agent = DQN(state_dim,action_dim,cfg)
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rewards,ma_rewards = train(cfg,env,agent)
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agent.save(path=SAVED_MODEL_PATH)
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save_results(rewards,ma_rewards,tag='train',path=RESULT_PATH)
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plot_rewards(rewards,ma_rewards,tag="train",algo = cfg.algo,path=RESULT_PATH)
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