Python deque extendleft與元組？

Question

我有一個deque最大長度爲10.是可能的.extendleft並添加一個元組。例如：

from collections import deque 

x = deque(maxlen = 10) 
z = [(1,4),(1,3),(2,5),(7,1),(6,4),(8,2),(9,1),(9,5),(7,3),(8,3)] 
for y in z: 
    x.append(y) 
print x 
x.extendleft((6,7)) 
print x 

返回：

deque([(1, 4), (1, 3), (2, 5), (7, 1), (6, 4), (8, 2), (9, 1), (9, 5), (7, 3), (8, 3)], maxlen=10) 
deque([7, 6, (1, 4), (1, 3), (2, 5), (7, 1), (6, 4), (8, 2), (9, 1), (9, 5)], maxlen=10) 

我嘗試： 對=（6,7） x.extendleft（對） 具有相同的結果。

Answer 1

In [7]: x.extendleft([(6,7)]) 

In [8]: x 
Out[8]: deque([(6, 7), (1, 4), (1, 3), (2, 5), (7, 1), (6, 4), (8, 2), (9, 1), (9, 5), (7, 3)], maxlen=10) 

，或者更簡單的：

In [10]: x.appendleft((6, 7))