格式：

變量名 = namedtuple(任意名，list)

from collections import namedtuple

Point = namedtuple('point', ['x', 'y', 'z'])
p = Point(1,2,0)
print(p.x)
print(p.y, p.z)

print(isinstance(p, tuple))

運行結果：

1
2 0
True

雙向隊列：deque

https://docs.python.org/2.7/library/collections.html?highlight=deque#collections.deque

from collections import deque
q = deque(['a', 'b', 'c'])
q.append('x')       #尾插
q.appendleft('y')   #頭插
print(q)

運行結果：

deque(['y', 'a', 'b', 'c', 'x'])

python 內置模塊：collections