day_37

# 队列 先进先出FIFO - 维护秩序的时候用的比较多 买票 秒杀
# from queue import Queue
# q = Queue(5)
# print(q.qsize())
# q.put(12)
# q.put(3)
# q.put(4)
# q.put(4)
# q.put(4)
# q.put_nowait()
# print('***',q.qsize())
# print(q.get())
# print(q.get())
# print(q.get())
# print(q.get())         # 没有值的时候会阻塞
# print(q.get_nowait())  # 当有值的时候取值
# print(q.get_nowait())  # 没有值的时候会报错
# print(q.full())
# print(q.empty())
# print(q.qsize())
# print(q.get())
# print(q.get())
# print(q.qsize())

# 栈 先进后出 - 算法
    # 三级菜单
    # 计算文件夹的总大小