import collections tmp = collections.deque() tmp.appendleft(1) # appendleft()左边插入 tmp.appendleft(2) tmp.appendleft(3) tmp.append(4) # append() 右边（尾部）插入 tmp.append(5) tmp.append(6) print(tmp) # deque([3, 2, 1, 4, 5, 6]) print(list(tmp)) # [3, 2, 1, 4, 5, 6]
