Python - deque - temp

 

deque
list-like container with fast appends and pops on either end

>>> from collections import deque
>>>
>>>
>>> d = deque("abc")
>>> d
deque(['a', 'b', 'c'])
>>> d = deque([11,22,33])
>>> d
deque([11, 22, 33])
>>> d = deque("abc")
>>> d
deque(['a', 'b', 'c'])
>>> d.append('e')
>>> d
deque(['a', 'b', 'c', 'e'])
>>> d.rotate(1)
>>> d
deque(['e', 'a', 'b', 'c'])
>>> d.rotate(-2)
>>> d
deque(['b', 'c', 'e', 'a'])
>>> d.append("ghi")
>>> d
deque(['b', 'c', 'e', 'a', 'ghi'])
>>> d.extend("jkl")
>>> d
deque(['b', 'c', 'e', 'a', 'ghi', 'j', 'k', 'l'])
>>> d.pop()
'l'
>>> d.popleft()
'b'
>>> d
deque(['c', 'e', 'a', 'ghi', 'j', 'k'])
>>> d[0]
'c'
>>> d[-1]
'k'
>>>