a9f9940d17
- Refacor code to remove duplicate code - Enable async simulation for all vector envs - Remove `collector.close` and rename `VectorEnv` to `DummyVectorEnv` The abstraction of vector env changed. Prior to this pr, each vector env is almost independent. After this pr, each env is wrapped into a worker, and vector envs differ with their worker type. In fact, users can just use `BaseVectorEnv` with different workers, I keep `SubprocVectorEnv`, `ShmemVectorEnv` for backward compatibility. Co-authored-by: n+e <463003665@qq.com> Co-authored-by: magicly <magicly007@gmail.com>
97 lines
3.5 KiB
Python
97 lines
3.5 KiB
Python
import gym
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import time
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import random
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import numpy as np
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from gym.spaces import Discrete, MultiDiscrete, Box, Dict, Tuple
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class MyTestEnv(gym.Env):
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"""This is a "going right" task. The task is to go right ``size`` steps.
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"""
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def __init__(self, size, sleep=0, dict_state=False, recurse_state=False,
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ma_rew=0, multidiscrete_action=False, random_sleep=False):
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assert not (
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dict_state and recurse_state), \
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"dict_state and recurse_state cannot both be true"
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self.size = size
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self.sleep = sleep
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self.random_sleep = random_sleep
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self.dict_state = dict_state
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self.recurse_state = recurse_state
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self.ma_rew = ma_rew
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self._md_action = multidiscrete_action
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if dict_state:
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self.observation_space = Dict(
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{"index": Box(shape=(1, ), low=0, high=size - 1),
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"rand": Box(shape=(1,), low=0, high=1, dtype=np.float64)})
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elif recurse_state:
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self.observation_space = Dict(
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{"index": Box(shape=(1, ), low=0, high=size - 1),
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"dict": Dict({
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"tuple": Tuple((Discrete(2), Box(shape=(2,),
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low=0, high=1, dtype=np.float64))),
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"rand": Box(shape=(1, 2), low=0, high=1,
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dtype=np.float64)})
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})
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else:
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self.observation_space = Box(shape=(1, ), low=0, high=size - 1)
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if multidiscrete_action:
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self.action_space = MultiDiscrete([2, 2])
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else:
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self.action_space = Discrete(2)
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self.done = False
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self.index = 0
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self.seed()
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def seed(self, seed=0):
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self.rng = np.random.RandomState(seed)
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return [seed]
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def reset(self, state=0):
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self.done = False
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self.index = state
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return self._get_state()
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def _get_reward(self):
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"""Generate a non-scalar reward if ma_rew is True."""
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x = int(self.done)
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if self.ma_rew > 0:
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return [x] * self.ma_rew
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return x
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def _get_state(self):
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"""Generate state(observation) of MyTestEnv"""
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if self.dict_state:
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return {'index': np.array([self.index], dtype=np.float32),
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'rand': self.rng.rand(1)}
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elif self.recurse_state:
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return {'index': np.array([self.index], dtype=np.float32),
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'dict': {"tuple": (np.array([1],
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dtype=np.int64), self.rng.rand(2)),
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"rand": self.rng.rand(1, 2)}}
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else:
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return np.array([self.index], dtype=np.float32)
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def step(self, action):
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if self._md_action:
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action = action[0]
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if self.done:
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raise ValueError('step after done !!!')
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if self.sleep > 0:
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sleep_time = random.random() if self.random_sleep else 1
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sleep_time *= self.sleep
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time.sleep(sleep_time)
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if self.index == self.size:
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self.done = True
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return self._get_state(), self._get_reward(), self.done, {}
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if action == 0:
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self.index = max(self.index - 1, 0)
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return self._get_state(), self._get_reward(), self.done, \
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{'key': 1, 'env': self} if self.dict_state else {}
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elif action == 1:
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self.index += 1
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self.done = self.index == self.size
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return self._get_state(), self._get_reward(), \
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self.done, {'key': 1, 'env': self}
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