#For a stack (LIFO), stack with append() and destack with pop():
>>> a = [5,8,9]
>>> a.append(11)
>>> a
[5, 8, 9, 11]
>>> a.pop()
11
>>> a.pop()
9
>>> a
[5, 8]
>>>

#For a queue (FIFO), enqueue with append() and dequeue with pop(0):
>>> a = [5,8,9]
>>> a.append(11)
>>> a
[5, 8, 9, 11]
>>> a.pop(0)
5
>>> a.pop(0)
8
>>> a
[9, 11]
#//python/202