#栈的实现
class Stack():
  def __init__(self,size):
    self.stack=[]
    self.size=size
    self.top=-1
  def push(self,content):
    if self.Full():
      print "Stack is Full"
    else:
      self.stack.append(content)
      self.top=self.top+1
  def out(self):
    if self.Empty():
      print "Stack is Empty"
    else:
      self.top-=1
  def Full(self):
    if self.top==self.size-1:
      return True
    else:
      return False
  def Empty(self):
    if self.top==-1:
      print "Stack is Empty"
if __name__=="__main__":
  q=Stack(7)
  q.Empty()
  q.push("hello")
  q.Empty()

#队列的实现
class Queue():
  def __init__(self,size):
    self.queue=[]
    self.size=size
    self.head=-1
    self.tail=-1
  def Empty(self):
    if self.head==self.tail:
      return True
    else:
      return False
  def Full(self):
    if self.tail-self.head==self.size-1:
      return True
    else:
      return False
  def enQueue(self,content):
    if self.Full():
      print "Queue is Full"
    else:
      self.queue.append(content)
      self.tail+=1
  def outQueue(self):
    if self.Empty():
      print "Queue is Empty!"
    else:
      self.head+=1
if __name__=="__main__":
  q=Queue(6)
  print q.Empty() # True
  q.enQueue("123")
  print q.Empty() #False
  q.outQueue()