Help me create a new class called StatQueue where the operations dequeue() and enqueue(e) should be rewrote in the StatQueue class.

Here is the code: ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

class LinkedQueue:

"""FIFO queue implementation using a singly linked list for storage."""

#-------------------------- nested _Node class --------------------------

class _Node:

"""Lightweight, nonpublic class for storing a singly linked node."""

__slots__ = '_element', '_next' # streamline memory usage

def __init__(self, element, next):

self._element = element

self._next = next

#------------------------------- queue methods -------------------------------

def __init__(self):

self._head = None

self._tail = None

self._size = 0 # number of queue elements

def __len__(self):

return self._size

def is_empty(self):

return self._size == 0

def first(self):

if self.is_empty():

print('Queue is empty')

return ""

return self._head._element

def dequeue(self):

if self.is_empty():

print('Queue is empty')

return ""

# raise Empty('Queue is empty')

answer = self._head._element

self._head = self._head._next

self._size -= 1

if self.is_empty():

self._tail = None

return answer

def enqueue(self, e):

"""Add an element to the back of queue."""

newest = self._Node(e, None)

if self.is_empty():

self._head = newest

else:

self._tail._next = newest

self._tail = newest

self._size += 1

def disp(self):

next = self._head

while next != None:

print(next._element)

next = next._next

if __name__ == '__main__':

lQueue = LinkedQueue()

print(lQueue.is_empty())

lQueue.enqueue(1)

lQueue.enqueue(2)

lQueue.enqueue(3)

print(lQueue.is_empty())

lQueue.disp()