35 lines
928 B
Python
35 lines
928 B
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: 2020-06-10 15:27:16
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@LastEditor: John
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LastEditTime: 2021-03-13 11:37:15
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@Discription:
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@Environment: python 3.7.7
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'''
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import random
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class ReplayBuffer:
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def __init__(self, capacity):
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self.capacity = capacity
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self.buffer = []
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self.position = 0
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def push(self, state, action, reward, next_state, done):
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if len(self.buffer) < self.capacity:
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self.buffer.append(None)
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self.buffer[self.position] = (state, action, reward, next_state, done)
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self.position = (self.position + 1) % self.capacity
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def sample(self, batch_size):
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batch = random.sample(self.buffer, batch_size)
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state, action, reward, next_state, done = zip(*batch)
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return state, action, reward, next_state, done
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def __len__(self):
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return len(self.buffer)
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