python 队列

>>> import collections
>>> q = collections.deque()
>>> q.append('a')
>>> q.append('b')
>>> q.append('c')
>>> q
deque(['a', 'b', 'c'])

>>> q.appendleft('d')
>>> q
deque(['d', 'a', 'b', 'c'])

>>> q.clear()
>>> q
deque([])

>>> q = collections.deque()
>>> q.append('a')
>>> q.append('b')
>>> q.append('c')
>>> q.append('a')
>>> q.count('a')
2

>>> q.extend(['a','b'])
>>> q
deque(['a', 'b', 'c', 'a', 'a', 'b'])

>>> q
deque(['a', 'b', 'c', 'a', 'a', 'b'])
>>> q.index('a')
0

>>> q
deque(['1', '2', '3', '4', '5'])
>>> q.rotate(2)
>>> q
deque(['4', '5', '1', '2', '3'])

>>> import queue
>>> q = queue.Queue()
>>> q.put('1')
>>> q.put('2')
>>> q.qsize()
2
>>> q.get()
'1'
>>>
>>> q.get()
'2'
>>> q.get()