new_contents: class Queue(object):
      def __init__(self):
          """
          initialize your data structure here.
          """
          self.q = []
  
      def push(self, x):
          """
          :type x: int
          :rtype: nothing
          """
          self.q.append(x)
          
  
      def pop(self):
          """
          :rtype: nothing
          """
          self.q
  
      def peek(self):
          """
          :rtype: int
          """
          return self.q[0]
  
      def empty(self):
          """
          :rtype: bool
          """
          return len(self.q) == 0
  
subject: add iqus