Lecture Notes on 21 Mar 2018

class Queue (object):
  def __init__ (self):
    self.queue = []

  # add an item to the queue
  def enqueue (self, item):
    self.queue.append (item)

  # remove an item from the queue
  def dequeue (self):
    return (self.queue.pop(0))

  # check if the queue is empty
  def is_empty (self):
    return (len (self.queue) == 0)

  # determine the size of the queue
  def size (self):
    return (len (self.queue))