from collections import deque
 
# 創(chuàng)建帶有容量的隊列
q = deque([], 5)
# 一次添加多個元素
a = [1, 2, 3, 4, 5]
q.extend(a)
print(q)
# 添加第6個元素，查看隊列時發(fā)現(xiàn)第1個元素已經(jīng)被擠出去了
q.append(6)
print(q)

q = deque([1, 2, 3, 4, 5], maxlen=5)
# 存儲對象到文件
pickle.dump(q, open('history', 'wb'))
# 讀取文件中對象
q2 = pickle.load(open('history', 'rb'))
print(q2)

from random import randint
from collections import deque
import pickle
# 猜數(shù)字游戲，首先產(chǎn)生一個0到100數(shù)字，然后讓用戶猜
N = randint(0, 100)
print('答案：' + str(N))
# 初始化隊列，容量為5
history = deque([], 5)
# 讀取文件中的歷史記錄
history = pickle.load(open('history', 'rb'))
print(history)
def guess(k):
    if k == N:
        print('right')
        return True
    if k < N:
        print('%s is less-than N' % k)
    else:
        print('%s is greater-than N' % k)
    return False
while True:
    line = input("Please input a number: ")
    if line.isdigit():
        k = int(line)
        # 記錄用戶輸入數(shù)字
        history.append(k)
        if guess(k):
            break
    elif line == 'history' or line == 'h?':
        # 用戶可以輸入命令查看歷史記錄
        print(list(history))
# 將歷史記錄保存到文件中
pickle.dump(history, open('history', 'wb'))