合并两个双端队列的最快方法

Question

有比这更快的合并两个双端队列的方法吗？

# a, b are two deques. The maximum length 
# of a is greater than the current length 
# of a plus the current length of b

while len(b):
  a.append(b.popleft())

请注意，我不关心保留输入deque，我只关心尽快获得合并后的deque。

- gvgramazio

Answer 1

不需要逐个元素添加，只需使用+=即可：

from collections import deque

a = deque([1, 2, 3])
b = deque([4, 5, 6])

a += b

print(a)

deque([1, 2, 3, 4, 5, 6])

- jpp