python from collections import deque queue in python

from collections import deque
lstm_history = deque(maxlen=5)

for ii in range(5):
    lstm_history.append(np.zeros([1]))
# 注意顺序行，那是队头，那是队尾
print('lstm_history:', lstm_history)
lstm_history.append('1')
lstm_history.append('2')
lstm_history.append('3')
lstm_history.append('4')
lstm_history.append('5')
print('--lstm_history:', lstm_history)
'''
lstm_history: deque([array([0.]), array([0.]), array([0.]), array([0.]), array([0.])], maxlen=5)
--lstm_history: deque(['1', '2', '3', '4', '5'], maxlen=5)
'''