Doubts on memory

[random-user-x]

ACER/memory.py

Line 24 in 3676af0

def sample(self, maxlen=0):

  def sample(self, maxlen=0):
    L = len(self.memory)
    if L > 0:
      e = random.randrange(L)
      mem = self.memory[e]
      T = len(mem)
      # Take a random subset of trajectory if maxlen specified, otherwise return full trajectory
      if maxlen > 0 and T > maxlen + 1:
        t = random.randrange(T - maxlen - 1)  # Include next state after final "maxlen" state
        return mem[t:t + maxlen + 1]
      else:
        return mem
    else :
      return None

Can we write the code in this way? I do not get the reason behind using while (True)