mirror of
https://github.com/krahets/hello-algo.git
synced 2024-12-28 05:36:29 +08:00
49 lines
1.3 KiB
Python
49 lines
1.3 KiB
Python
"""
|
|
File: deque.py
|
|
Created Time: 2022-11-29
|
|
Author: Peng Chen (pengchzn@gmail.com)
|
|
"""
|
|
|
|
import os.path as osp
|
|
import sys
|
|
|
|
sys.path.append(osp.dirname(osp.dirname(osp.abspath(__file__))))
|
|
from include import *
|
|
|
|
from collections import deque
|
|
|
|
|
|
""" Driver Code """
|
|
if __name__ == "__main__":
|
|
""" 初始化双向队列 """
|
|
duque = deque()
|
|
|
|
""" 元素入队 """
|
|
duque.append(2) # 添加至队尾
|
|
duque.append(5)
|
|
duque.append(4)
|
|
duque.appendleft(3) # 添加至队首
|
|
duque.appendleft(1)
|
|
print("双向队列 duque =", duque)
|
|
|
|
""" 访问元素 """
|
|
front = duque[0] # 队首元素
|
|
print("队首元素 front =", front)
|
|
rear = duque[-1] # 队尾元素
|
|
print("队尾元素 rear =", rear)
|
|
|
|
""" 元素出队 """
|
|
pop_front = duque.popleft() # 队首元素出队
|
|
print("队首出队元素 pop_front =", pop_front)
|
|
print("队首出队后 duque =", duque)
|
|
pop_rear = duque.pop() # 队尾元素出队
|
|
print("队尾出队元素 pop_rear =", pop_rear)
|
|
print("队尾出队后 duque =", duque)
|
|
|
|
""" 获取双向队列的长度 """
|
|
size = len(duque)
|
|
print("双向队列长度 size =", size)
|
|
|
|
""" 判断双向队列是否为空 """
|
|
is_empty = len(duque) == 0
|
|
print("双向队列是否为空 =", is_empty)
|