hello-algo/codes/python/chapter_stack_and_queue/stack.py

'''
File: stack.py
Created Time: 2022-11-25
Author: Krahets (krahets@163.com)
'''

import os.path as osp
import sys

sys.path.append(osp.dirname(osp.dirname(osp.abspath(__file__))))
from include import *

if __name__ == "__main__":
    """ 初始化栈 """
    stack = []

    """ 元素入栈 """
    stack.append(1)
    stack.append(3)
    stack.append(2)
    stack.append(5)
    stack.append(4)
    print("栈 stack = ", stack)

    """ 访问栈顶元素 """
    peek = stack[-1]
    print("栈顶元素 peek = ", peek)

    """ 元素出栈 """
    pop = stack.pop()
    print("出栈元素 pop = ", pop)
    print("出栈后 stack = ", stack)

    """ 获取栈的长度 """
    size = len(stack)
    print("栈的长度 size = ", size)

    """ 判断是否为空 """
    isEmpty = (stack == [])