Python实现历史记录功能(实际案例)

from collections import deque
 
# 创建带有容量的队列
q = deque([], 5)
# 一次添加多个元素
a = [1, 2, 3, 4, 5]
q.extend(a)
print(q)
# 添加第6个元素，查看队列时发现第1个元素已经被挤出去了
q.append(6)
print(q)

q = deque([1, 2, 3, 4, 5], maxlen=5)
# 存储对象到文件
pickle.dump(q, open('history', 'wb'))
# 读取文件中对象
q2 = pickle.load(open('history', 'rb'))
print(q2)

from random import randint
from collections import deque
import pickle
# 猜数字游戏，首先产生一个0到100数字，然后让用户猜
N = randint(0, 100)
print('答案：' + str(N))
# 初始化队列，容量为5
history = deque([], 5)
# 读取文件中的历史记录
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)
        # 记录用户输入数字
        history.append(k)
        if guess(k):
            break
    elif line == 'history' or line == 'h?':
        # 用户可以输入命令查看历史记录
        print(list(history))
# 将历史记录保存到文件中
pickle.dump(history, open('history', 'wb'))