old_contents: #! -*- coding: utf8 -*-
  from singer import Singer
  
  
  if __name__ == '__main__':
      t = Singer()
      print t.sing(1000000)
  
  
  
  
  
new_contents: #! -*- coding: utf8 -*-
  from __future__ import print_function
  from singer import Singer
  
  
  if __name__ == '__main__':
  
      t = Singer()
      print(t.sing(1000000))
  
  
  
  
  
subject: Improve to support python3