the major advantage of deques over lists is that inserting items at the beginning of deque is much faster than inserting items at the beginning of listalthough inserting items at the end of deque is very slightly slower than the equivalent operation on list deques are threadsafe and can be serialized using the pickle module useful way of thinking about deques is in terms of populating and consuming items items in deques are usually populated and consumed sequentially from either endwe can use the pop(and popleft(methods for consuming items in the dequefor examplewe can also use the rotate(nmethod to move and rotate all items of steps to the right for positive values of the integer nor left for negative values of the leftusing positive integers as the argumentfor example