Using python list , Stack ADT "peek()"
is implemented using [len (self.item) +1]

Using python list , Stack ADT "size()" is implemented using " len (self.item) "

Deque is a hybrid linear structure, so it requires the LIFO and FIFO ordering.

deque ()
creates a new empty deque. returns an empty queue

Elements are added at one end called(front)

Elements are removed from the other end(front)

dequeue()
removes the rare item, returns the item.

A network printer is an example of a

in Queue is_empty() : tests to see whether the queue is empty. It needs no parameters and returns the item.

enqueue(item) adds a new item to the rear of the queue. It needs the item and returns nothing.

Using python list , Queue ADT "enqueue()" is implemented using pop (0 , item)

the string "bla bla bla" is a palindrome word.

Using python list , Queue ADT "size()" is implemented using len (self.item - 1 )

Deque : New items can be added at either the front or the rear.Likewise, existing items can't be removed from either end

add_front(item) adds a new item to the front of the deque. It needs the item and returns item.

size() returns the number of items in the deque. It needs no parameters and returns an integer

add_rear(item) adds a new item to the front of the deque. It needs the item and returns nothing.

remove_front() removes the front item from the deque. It needs parameters and returns the item