Присоединяйтесь к двум деке
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])
Jack Williams
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])