python学习笔记之--list实现堆栈和队列

通过list实现堆栈

堆栈就是存储数据的一种数据结构，后存入的数据，会被先取出（先进后出）

>>> stack = [3, 4, 5]
>>> stack.append(6)
>>> stack.append(7)
>>> print (stack)
[3, 4, 5, 6, 7]
>>> print (stack.pop())
7
>>> print (stack)
[3, 4, 5, 6]
>>> print (stack.pop())
6
>>> print (stack.pop())
5
>>> print (stack)
[3, 4]
>>>

通过list实现队列

先进先出

>>> a=[]

>>> a.append(1)

>>> a.append(2)

>>> a.append(3)

>>> a

[1, 2, 3]

>>> a.pop(0)

Traceback (most recent call last):

File "<stdin>", line 1, in <module>

IndexError: pop from empty list