old_contents: from .transition import Transition
  
  
  class CircularBuffer(object):
      def __init__(self, capacity=100000):
          self.capacity = capacity
          self.memory = []
          self.position = 0
  
      def push(self, *args):
          if len(self.memory) < self.capacity:
              self.memory.append(Transition(*args))
          else:
              self.memory[self.position] = Transition(*args)
          self.position = self.position % self.capacity
  
      def get_batch(self):
          return self.memory[:self.position]
  
      def reset(self):
          self.memory.clear()
          self.position = 0
  
      def __len__(self):
          return len(self.memory)
  
new_contents: from .transition import Transition
  
  
  class CircularBuffer(object):
      def __init__(self, capacity=100000):
          self.capacity = capacity
          self.memory = []
          self.position = 0
  
      def push(self, *args):
          if len(self.memory) < self.capacity:
              self.memory.append(Transition(*args))
          else:
              self.memory[self.position] = Transition(*args)
          self.position = (self.position + 1) % self.capacity
  
      def get_batch(self):
          return self.memory[:self.position]
  
      def reset(self):
          self.memory.clear()
          self.position = 0
  
      def __len__(self):
          return len(self.memory)
  
subject: Fix index. Caught by Tudor.